/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-1-dsl.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 22:28:41,836 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 22:28:41,837 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 22:28:41,876 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 22:28:41,931 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 22:28:41,931 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 22:28:41,932 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 22:28:41,938 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 22:28:41,971 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 22:28:41,972 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 22:28:41,972 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 22:28:41,972 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 22:28:41,974 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 22:28:41,975 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 22:28:41,975 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 22:28:41,975 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 22:28:41,975 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 22:28:41,975 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 22:28:41,976 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 22:28:41,976 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 22:28:41,976 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 22:28:41,976 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 22:28:41,976 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 22:28:41,977 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 22:28:41,977 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 22:28:41,977 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 22:28:41,977 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 22:28:41,977 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 22:28:41,977 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 22:28:41,977 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 22:28:41,977 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 22:28:41,978 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 22:28:41,978 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 22:28:41,978 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 22:28:41,978 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 22:28:41,978 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 22:28:41,978 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 22:28:41,978 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 22:28:41,978 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 22:28:41,979 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 22:28:42,259 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 22:28:42,276 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 22:28:42,278 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 22:28:42,279 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 22:28:42,280 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 22:28:42,281 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-1-dsl.wvr.bpl [2021-06-05 22:28:42,281 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-1-dsl.wvr.bpl' [2021-06-05 22:28:42,303 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 22:28:42,304 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 22:28:42,305 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 22:28:42,305 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 22:28:42,305 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 22:28:42,315 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:28:42" (1/1) ... [2021-06-05 22:28:42,322 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:28:42" (1/1) ... [2021-06-05 22:28:42,328 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 22:28:42,333 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 22:28:42,333 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 22:28:42,333 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 22:28:42,339 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:28:42" (1/1) ... [2021-06-05 22:28:42,339 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:28:42" (1/1) ... [2021-06-05 22:28:42,340 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:28:42" (1/1) ... [2021-06-05 22:28:42,340 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:28:42" (1/1) ... [2021-06-05 22:28:42,343 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:28:42" (1/1) ... [2021-06-05 22:28:42,346 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:28:42" (1/1) ... [2021-06-05 22:28:42,347 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:28:42" (1/1) ... [2021-06-05 22:28:42,352 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 22:28:42,353 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 22:28:42,353 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 22:28:42,353 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 22:28:42,358 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:28:42" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 22:28:42,428 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 22:28:42,428 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 22:28:42,428 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 22:28:42,428 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 22:28:42,428 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 22:28:42,429 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 22:28:42,430 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 22:28:42,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 22:28:42,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 22:28:42,430 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 22:28:42,430 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 22:28:42,432 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 22:28:42,432 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-06-05 22:28:42,432 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-06-05 22:28:42,432 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-06-05 22:28:42,432 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2021-06-05 22:28:42,432 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2021-06-05 22:28:42,433 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2021-06-05 22:28:42,433 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread6 given in one single declaration [2021-06-05 22:28:42,433 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2021-06-05 22:28:42,434 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2021-06-05 22:28:42,435 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 22:28:42,701 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 22:28:42,701 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-06-05 22:28:42,702 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-06-05 22:28:42,703 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-06-05 22:28:42,703 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread5EXIT is neither atomic block end nor error location. [2021-06-05 22:28:42,703 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread6EXIT is neither atomic block end nor error location. [2021-06-05 22:28:42,704 INFO L202 PluginConnector]: Adding new model parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 10:28:42 BoogieIcfgContainer [2021-06-05 22:28:42,704 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 22:28:42,712 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 22:28:42,712 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 22:28:42,714 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 22:28:42,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:28:42" (1/2) ... [2021-06-05 22:28:42,715 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a11f8b6 and model type parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 10:28:42, skipping insertion in model container [2021-06-05 22:28:42,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 10:28:42" (2/2) ... [2021-06-05 22:28:42,716 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-sum-1-dsl.wvr.bpl [2021-06-05 22:28:42,736 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 22:28:42,737 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 22:28:42,737 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 22:28:42,737 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 22:28:42,873 INFO L149 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2021-06-05 22:28:42,892 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-05 22:28:42,909 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 22:28:42,909 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 22:28:42,909 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 22:28:42,909 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 22:28:42,909 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 22:28:42,910 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 22:28:42,910 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 22:28:42,910 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == thread4Thread1of1ForFork1======== [2021-06-05 22:28:42,924 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 59 places, 48 transitions, 168 flow [2021-06-05 22:28:42,973 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 405 states, 403 states have (on average 3.880893300248139) internal successors, (1564), 404 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:42,976 INFO L276 IsEmpty]: Start isEmpty. Operand has 405 states, 403 states have (on average 3.880893300248139) internal successors, (1564), 404 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:42,996 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 22:28:42,997 INFO L301 ceAbstractionStarter]: Result for error location thread4Thread1of1ForFork1 was SAFE (1/5) [2021-06-05 22:28:43,000 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-05 22:28:43,008 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 22:28:43,009 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 22:28:43,009 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 22:28:43,009 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 22:28:43,009 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 22:28:43,009 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 22:28:43,009 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 22:28:43,009 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == thread1======== [2021-06-05 22:28:43,011 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 59 places, 48 transitions, 168 flow [2021-06-05 22:28:43,026 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 405 states, 403 states have (on average 3.880893300248139) internal successors, (1564), 404 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:43,027 INFO L276 IsEmpty]: Start isEmpty. Operand has 405 states, 403 states have (on average 3.880893300248139) internal successors, (1564), 404 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:43,028 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 22:28:43,029 INFO L301 ceAbstractionStarter]: Result for error location thread1 was SAFE (2/5) [2021-06-05 22:28:43,029 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-05 22:28:43,040 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 22:28:43,041 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 22:28:43,041 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 22:28:43,041 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 22:28:43,041 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 22:28:43,041 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 22:28:43,041 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 22:28:43,041 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == thread4======== [2021-06-05 22:28:43,043 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 59 places, 48 transitions, 168 flow [2021-06-05 22:28:43,062 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 405 states, 403 states have (on average 3.880893300248139) internal successors, (1564), 404 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:43,063 INFO L276 IsEmpty]: Start isEmpty. Operand has 405 states, 403 states have (on average 3.880893300248139) internal successors, (1564), 404 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:43,064 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 22:28:43,065 INFO L301 ceAbstractionStarter]: Result for error location thread4 was SAFE (3/5) [2021-06-05 22:28:43,066 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-05 22:28:43,069 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 22:28:43,069 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 22:28:43,070 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 22:28:43,070 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 22:28:43,070 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 22:28:43,070 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 22:28:43,070 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 22:28:43,070 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == thread1Thread1of1ForFork0======== [2021-06-05 22:28:43,075 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 59 places, 48 transitions, 168 flow [2021-06-05 22:28:43,088 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 405 states, 403 states have (on average 3.880893300248139) internal successors, (1564), 404 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:43,089 INFO L276 IsEmpty]: Start isEmpty. Operand has 405 states, 403 states have (on average 3.880893300248139) internal successors, (1564), 404 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:43,091 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 22:28:43,091 INFO L301 ceAbstractionStarter]: Result for error location thread1Thread1of1ForFork0 was SAFE (4/5) [2021-06-05 22:28:43,091 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 22:28:43,092 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 22:28:43,093 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 22:28:43,093 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 22:28:43,093 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 22:28:43,093 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 22:28:43,093 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 22:28:43,093 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 22:28:43,093 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 22:28:43,096 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 59 places, 48 transitions, 168 flow [2021-06-05 22:28:43,109 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 405 states, 403 states have (on average 3.880893300248139) internal successors, (1564), 404 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:43,111 INFO L276 IsEmpty]: Start isEmpty. Operand has 405 states, 403 states have (on average 3.880893300248139) internal successors, (1564), 404 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:43,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:28:43,113 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:43,114 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:43,114 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:43,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:43,119 INFO L82 PathProgramCache]: Analyzing trace with hash 361941206, now seen corresponding path program 1 times [2021-06-05 22:28:43,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:43,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492213139] [2021-06-05 22:28:43,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:43,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:43,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:43,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:43,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492213139] [2021-06-05 22:28:43,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492213139] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:28:43,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:28:43,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 22:28:43,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739840571] [2021-06-05 22:28:43,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 22:28:43,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:43,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 22:28:43,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 22:28:43,435 INFO L87 Difference]: Start difference. First operand has 405 states, 403 states have (on average 3.880893300248139) internal successors, (1564), 404 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:43,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:43,532 INFO L93 Difference]: Finished difference Result 1089 states and 4336 transitions. [2021-06-05 22:28:43,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 22:28:43,534 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:28:43,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:43,564 INFO L225 Difference]: With dead ends: 1089 [2021-06-05 22:28:43,565 INFO L226 Difference]: Without dead ends: 1068 [2021-06-05 22:28:43,566 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:28:43,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2021-06-05 22:28:43,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 525. [2021-06-05 22:28:43,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 3.881679389312977) internal successors, (2034), 524 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:43,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 2034 transitions. [2021-06-05 22:28:43,672 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 2034 transitions. Word has length 22 [2021-06-05 22:28:43,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:43,673 INFO L482 AbstractCegarLoop]: Abstraction has 525 states and 2034 transitions. [2021-06-05 22:28:43,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:43,674 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 2034 transitions. [2021-06-05 22:28:43,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 22:28:43,676 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:43,676 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:43,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 22:28:43,677 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:43,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:43,677 INFO L82 PathProgramCache]: Analyzing trace with hash -250335374, now seen corresponding path program 2 times [2021-06-05 22:28:43,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:43,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037044540] [2021-06-05 22:28:43,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:43,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:43,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:43,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:43,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037044540] [2021-06-05 22:28:43,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037044540] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:28:43,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:28:43,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 22:28:43,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407932879] [2021-06-05 22:28:43,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 22:28:43,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:43,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 22:28:43,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 22:28:43,770 INFO L87 Difference]: Start difference. First operand 525 states and 2034 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:43,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:43,812 INFO L93 Difference]: Finished difference Result 1218 states and 4830 transitions. [2021-06-05 22:28:43,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 22:28:43,813 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 22:28:43,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:43,822 INFO L225 Difference]: With dead ends: 1218 [2021-06-05 22:28:43,822 INFO L226 Difference]: Without dead ends: 1197 [2021-06-05 22:28:43,823 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:28:43,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2021-06-05 22:28:43,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 545. [2021-06-05 22:28:43,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 544 states have (on average 3.8529411764705883) internal successors, (2096), 544 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:43,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 2096 transitions. [2021-06-05 22:28:43,847 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 2096 transitions. Word has length 22 [2021-06-05 22:28:43,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:43,847 INFO L482 AbstractCegarLoop]: Abstraction has 545 states and 2096 transitions. [2021-06-05 22:28:43,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:43,847 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 2096 transitions. [2021-06-05 22:28:43,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:28:43,850 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:43,850 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:43,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 22:28:43,851 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:43,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:43,851 INFO L82 PathProgramCache]: Analyzing trace with hash 568064983, now seen corresponding path program 1 times [2021-06-05 22:28:43,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:43,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081618280] [2021-06-05 22:28:43,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:43,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:43,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:43,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:43,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081618280] [2021-06-05 22:28:43,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081618280] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:28:43,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:28:43,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 22:28:43,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591159828] [2021-06-05 22:28:43,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 22:28:43,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:43,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 22:28:43,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 22:28:43,911 INFO L87 Difference]: Start difference. First operand 545 states and 2096 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:43,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:43,938 INFO L93 Difference]: Finished difference Result 545 states and 1997 transitions. [2021-06-05 22:28:43,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 22:28:43,939 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:28:43,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:43,944 INFO L225 Difference]: With dead ends: 545 [2021-06-05 22:28:43,944 INFO L226 Difference]: Without dead ends: 529 [2021-06-05 22:28:43,944 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 22:28:43,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-06-05 22:28:43,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 529. [2021-06-05 22:28:43,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 528 states have (on average 3.6761363636363638) internal successors, (1941), 528 states have internal predecessors, (1941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:43,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 1941 transitions. [2021-06-05 22:28:43,966 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 1941 transitions. Word has length 24 [2021-06-05 22:28:43,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:43,966 INFO L482 AbstractCegarLoop]: Abstraction has 529 states and 1941 transitions. [2021-06-05 22:28:43,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:43,967 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 1941 transitions. [2021-06-05 22:28:43,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:28:43,970 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:43,970 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:43,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 22:28:43,970 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:43,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:43,971 INFO L82 PathProgramCache]: Analyzing trace with hash -2009965705, now seen corresponding path program 1 times [2021-06-05 22:28:43,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:43,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443036510] [2021-06-05 22:28:43,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:43,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:44,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:44,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:44,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443036510] [2021-06-05 22:28:44,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443036510] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:28:44,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:28:44,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:28:44,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874889943] [2021-06-05 22:28:44,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:28:44,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:44,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:28:44,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:28:44,022 INFO L87 Difference]: Start difference. First operand 529 states and 1941 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:44,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:44,201 INFO L93 Difference]: Finished difference Result 1358 states and 5017 transitions. [2021-06-05 22:28:44,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:28:44,202 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:28:44,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:44,210 INFO L225 Difference]: With dead ends: 1358 [2021-06-05 22:28:44,210 INFO L226 Difference]: Without dead ends: 1346 [2021-06-05 22:28:44,210 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 89.9ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:28:44,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1346 states. [2021-06-05 22:28:44,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1346 to 680. [2021-06-05 22:28:44,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 679 states have (on average 3.787923416789396) internal successors, (2572), 679 states have internal predecessors, (2572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:44,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 2572 transitions. [2021-06-05 22:28:44,241 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 2572 transitions. Word has length 24 [2021-06-05 22:28:44,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:44,241 INFO L482 AbstractCegarLoop]: Abstraction has 680 states and 2572 transitions. [2021-06-05 22:28:44,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:44,242 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 2572 transitions. [2021-06-05 22:28:44,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:28:44,244 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:44,244 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:44,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 22:28:44,245 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:44,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:44,245 INFO L82 PathProgramCache]: Analyzing trace with hash 881171321, now seen corresponding path program 1 times [2021-06-05 22:28:44,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:44,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447843326] [2021-06-05 22:28:44,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:44,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:44,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:44,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:44,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447843326] [2021-06-05 22:28:44,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447843326] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:28:44,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:28:44,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 22:28:44,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328041357] [2021-06-05 22:28:44,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 22:28:44,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:44,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 22:28:44,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 22:28:44,278 INFO L87 Difference]: Start difference. First operand 680 states and 2572 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:44,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:44,307 INFO L93 Difference]: Finished difference Result 652 states and 2325 transitions. [2021-06-05 22:28:44,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 22:28:44,308 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:28:44,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:44,311 INFO L225 Difference]: With dead ends: 652 [2021-06-05 22:28:44,311 INFO L226 Difference]: Without dead ends: 604 [2021-06-05 22:28:44,311 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 22:28:44,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-06-05 22:28:44,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 604. [2021-06-05 22:28:44,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 603 states have (on average 3.583747927031509) internal successors, (2161), 603 states have internal predecessors, (2161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:44,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 2161 transitions. [2021-06-05 22:28:44,328 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 2161 transitions. Word has length 24 [2021-06-05 22:28:44,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:44,328 INFO L482 AbstractCegarLoop]: Abstraction has 604 states and 2161 transitions. [2021-06-05 22:28:44,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:44,328 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 2161 transitions. [2021-06-05 22:28:44,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:28:44,330 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:44,330 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:44,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 22:28:44,331 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:44,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:44,331 INFO L82 PathProgramCache]: Analyzing trace with hash 456543479, now seen corresponding path program 1 times [2021-06-05 22:28:44,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:44,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602083706] [2021-06-05 22:28:44,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:44,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:44,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:44,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:44,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602083706] [2021-06-05 22:28:44,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602083706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:44,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936844393] [2021-06-05 22:28:44,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:44,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:44,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 22:28:44,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:44,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:44,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936844393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:44,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:44,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 22:28:44,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057268052] [2021-06-05 22:28:44,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 22:28:44,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:44,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 22:28:44,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:28:44,611 INFO L87 Difference]: Start difference. First operand 604 states and 2161 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:44,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:44,692 INFO L93 Difference]: Finished difference Result 1057 states and 3653 transitions. [2021-06-05 22:28:44,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:28:44,693 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:28:44,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:44,698 INFO L225 Difference]: With dead ends: 1057 [2021-06-05 22:28:44,698 INFO L226 Difference]: Without dead ends: 989 [2021-06-05 22:28:44,699 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 34.4ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:28:44,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2021-06-05 22:28:44,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 685. [2021-06-05 22:28:44,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 684 states have (on average 3.6271929824561404) internal successors, (2481), 684 states have internal predecessors, (2481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:44,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 2481 transitions. [2021-06-05 22:28:44,730 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 2481 transitions. Word has length 24 [2021-06-05 22:28:44,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:44,730 INFO L482 AbstractCegarLoop]: Abstraction has 685 states and 2481 transitions. [2021-06-05 22:28:44,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:44,731 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 2481 transitions. [2021-06-05 22:28:44,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:28:44,733 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:44,733 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:44,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-06-05 22:28:44,957 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:44,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:44,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1051081059, now seen corresponding path program 2 times [2021-06-05 22:28:44,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:44,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085312008] [2021-06-05 22:28:44,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:44,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:45,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:45,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:45,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085312008] [2021-06-05 22:28:45,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085312008] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:28:45,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:28:45,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:28:45,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819367526] [2021-06-05 22:28:45,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:28:45,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:45,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:28:45,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:28:45,005 INFO L87 Difference]: Start difference. First operand 685 states and 2481 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:45,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:45,094 INFO L93 Difference]: Finished difference Result 990 states and 3448 transitions. [2021-06-05 22:28:45,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 22:28:45,095 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:28:45,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:45,100 INFO L225 Difference]: With dead ends: 990 [2021-06-05 22:28:45,100 INFO L226 Difference]: Without dead ends: 963 [2021-06-05 22:28:45,100 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 51.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:28:45,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2021-06-05 22:28:45,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 703. [2021-06-05 22:28:45,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 3.6210826210826212) internal successors, (2542), 702 states have internal predecessors, (2542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:45,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 2542 transitions. [2021-06-05 22:28:45,122 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 2542 transitions. Word has length 24 [2021-06-05 22:28:45,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:45,123 INFO L482 AbstractCegarLoop]: Abstraction has 703 states and 2542 transitions. [2021-06-05 22:28:45,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:45,123 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 2542 transitions. [2021-06-05 22:28:45,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:28:45,127 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:45,127 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:45,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 22:28:45,128 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:45,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:45,130 INFO L82 PathProgramCache]: Analyzing trace with hash -219308433, now seen corresponding path program 2 times [2021-06-05 22:28:45,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:45,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563929209] [2021-06-05 22:28:45,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:45,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:45,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:45,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:45,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563929209] [2021-06-05 22:28:45,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563929209] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:28:45,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:28:45,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:28:45,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906619868] [2021-06-05 22:28:45,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:28:45,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:45,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:28:45,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:28:45,191 INFO L87 Difference]: Start difference. First operand 703 states and 2542 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:45,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:45,271 INFO L93 Difference]: Finished difference Result 1033 states and 3563 transitions. [2021-06-05 22:28:45,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:28:45,272 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:28:45,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:45,277 INFO L225 Difference]: With dead ends: 1033 [2021-06-05 22:28:45,277 INFO L226 Difference]: Without dead ends: 949 [2021-06-05 22:28:45,278 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:28:45,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2021-06-05 22:28:45,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 628. [2021-06-05 22:28:45,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 627 states have (on average 3.5964912280701755) internal successors, (2255), 627 states have internal predecessors, (2255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:45,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 2255 transitions. [2021-06-05 22:28:45,305 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 2255 transitions. Word has length 24 [2021-06-05 22:28:45,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:45,305 INFO L482 AbstractCegarLoop]: Abstraction has 628 states and 2255 transitions. [2021-06-05 22:28:45,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:45,305 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 2255 transitions. [2021-06-05 22:28:45,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:28:45,308 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:45,308 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:45,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 22:28:45,309 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:45,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:45,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1513578361, now seen corresponding path program 3 times [2021-06-05 22:28:45,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:45,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65048283] [2021-06-05 22:28:45,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:45,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:45,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:45,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:45,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65048283] [2021-06-05 22:28:45,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65048283] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:28:45,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:28:45,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:28:45,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131874270] [2021-06-05 22:28:45,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:28:45,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:45,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:28:45,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:28:45,344 INFO L87 Difference]: Start difference. First operand 628 states and 2255 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:45,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:45,434 INFO L93 Difference]: Finished difference Result 847 states and 3018 transitions. [2021-06-05 22:28:45,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 22:28:45,434 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:28:45,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:45,439 INFO L225 Difference]: With dead ends: 847 [2021-06-05 22:28:45,439 INFO L226 Difference]: Without dead ends: 827 [2021-06-05 22:28:45,439 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 30.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:28:45,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2021-06-05 22:28:45,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 620. [2021-06-05 22:28:45,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 619 states have (on average 3.61389337641357) internal successors, (2237), 619 states have internal predecessors, (2237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:45,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 2237 transitions. [2021-06-05 22:28:45,459 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 2237 transitions. Word has length 24 [2021-06-05 22:28:45,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:45,459 INFO L482 AbstractCegarLoop]: Abstraction has 620 states and 2237 transitions. [2021-06-05 22:28:45,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:45,459 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 2237 transitions. [2021-06-05 22:28:45,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:28:45,461 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:45,461 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:45,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-05 22:28:45,461 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:45,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:45,462 INFO L82 PathProgramCache]: Analyzing trace with hash -939014659, now seen corresponding path program 3 times [2021-06-05 22:28:45,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:45,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534386142] [2021-06-05 22:28:45,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:45,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:45,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:45,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:45,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534386142] [2021-06-05 22:28:45,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534386142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:45,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108911888] [2021-06-05 22:28:45,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:45,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:28:45,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:45,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 22:28:45,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:45,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:45,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108911888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:45,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:45,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 22:28:45,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376546833] [2021-06-05 22:28:45,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 22:28:45,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:45,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 22:28:45,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 22:28:45,672 INFO L87 Difference]: Start difference. First operand 620 states and 2237 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:45,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:45,749 INFO L93 Difference]: Finished difference Result 857 states and 3066 transitions. [2021-06-05 22:28:45,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:28:45,749 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:28:45,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:45,754 INFO L225 Difference]: With dead ends: 857 [2021-06-05 22:28:45,754 INFO L226 Difference]: Without dead ends: 857 [2021-06-05 22:28:45,754 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 33.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:28:45,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2021-06-05 22:28:45,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 548. [2021-06-05 22:28:45,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 3.579524680073126) internal successors, (1958), 547 states have internal predecessors, (1958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:45,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 1958 transitions. [2021-06-05 22:28:45,772 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 1958 transitions. Word has length 24 [2021-06-05 22:28:45,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:45,772 INFO L482 AbstractCegarLoop]: Abstraction has 548 states and 1958 transitions. [2021-06-05 22:28:45,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:45,772 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 1958 transitions. [2021-06-05 22:28:45,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:28:45,775 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:45,775 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:45,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 22:28:45,989 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:45,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:45,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1997239533, now seen corresponding path program 4 times [2021-06-05 22:28:45,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:45,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126575711] [2021-06-05 22:28:45,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:45,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:46,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:46,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:46,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126575711] [2021-06-05 22:28:46,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126575711] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:28:46,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:28:46,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:28:46,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515510184] [2021-06-05 22:28:46,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:28:46,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:46,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:28:46,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:28:46,013 INFO L87 Difference]: Start difference. First operand 548 states and 1958 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:46,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:46,083 INFO L93 Difference]: Finished difference Result 866 states and 3014 transitions. [2021-06-05 22:28:46,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 22:28:46,084 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:28:46,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:46,088 INFO L225 Difference]: With dead ends: 866 [2021-06-05 22:28:46,088 INFO L226 Difference]: Without dead ends: 842 [2021-06-05 22:28:46,089 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 25.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:28:46,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2021-06-05 22:28:46,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 608. [2021-06-05 22:28:46,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 607 states have (on average 3.602965403624382) internal successors, (2187), 607 states have internal predecessors, (2187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:46,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 2187 transitions. [2021-06-05 22:28:46,106 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 2187 transitions. Word has length 24 [2021-06-05 22:28:46,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:46,106 INFO L482 AbstractCegarLoop]: Abstraction has 608 states and 2187 transitions. [2021-06-05 22:28:46,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:46,106 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 2187 transitions. [2021-06-05 22:28:46,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:28:46,108 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:46,108 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:46,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-05 22:28:46,109 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:46,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:46,109 INFO L82 PathProgramCache]: Analyzing trace with hash 469269651, now seen corresponding path program 4 times [2021-06-05 22:28:46,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:46,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491462880] [2021-06-05 22:28:46,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:46,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:46,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:46,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:46,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491462880] [2021-06-05 22:28:46,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491462880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:46,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431172180] [2021-06-05 22:28:46,131 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:46,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:28:46,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:46,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 22:28:46,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:46,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:46,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431172180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:46,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:46,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 22:28:46,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762354377] [2021-06-05 22:28:46,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 22:28:46,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:46,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 22:28:46,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:28:46,255 INFO L87 Difference]: Start difference. First operand 608 states and 2187 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:46,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:46,328 INFO L93 Difference]: Finished difference Result 825 states and 2855 transitions. [2021-06-05 22:28:46,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:28:46,329 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:28:46,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:46,333 INFO L225 Difference]: With dead ends: 825 [2021-06-05 22:28:46,334 INFO L226 Difference]: Without dead ends: 757 [2021-06-05 22:28:46,334 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 29.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:28:46,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2021-06-05 22:28:46,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 603. [2021-06-05 22:28:46,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 602 states have (on average 3.5930232558139537) internal successors, (2163), 602 states have internal predecessors, (2163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:46,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 2163 transitions. [2021-06-05 22:28:46,350 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 2163 transitions. Word has length 24 [2021-06-05 22:28:46,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:46,350 INFO L482 AbstractCegarLoop]: Abstraction has 603 states and 2163 transitions. [2021-06-05 22:28:46,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:46,350 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 2163 transitions. [2021-06-05 22:28:46,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:28:46,352 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:46,352 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:46,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-06-05 22:28:46,574 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:46,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:46,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1038354887, now seen corresponding path program 5 times [2021-06-05 22:28:46,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:46,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789435128] [2021-06-05 22:28:46,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:46,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:46,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:46,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:46,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789435128] [2021-06-05 22:28:46,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789435128] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:28:46,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:28:46,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:28:46,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440315730] [2021-06-05 22:28:46,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:28:46,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:46,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:28:46,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:28:46,596 INFO L87 Difference]: Start difference. First operand 603 states and 2163 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:46,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:46,706 INFO L93 Difference]: Finished difference Result 985 states and 3379 transitions. [2021-06-05 22:28:46,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 22:28:46,706 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:28:46,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:46,711 INFO L225 Difference]: With dead ends: 985 [2021-06-05 22:28:46,711 INFO L226 Difference]: Without dead ends: 946 [2021-06-05 22:28:46,711 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 39.4ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:28:46,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-06-05 22:28:46,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 591. [2021-06-05 22:28:46,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 3.6) internal successors, (2124), 590 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:46,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 2124 transitions. [2021-06-05 22:28:46,730 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 2124 transitions. Word has length 24 [2021-06-05 22:28:46,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:46,730 INFO L482 AbstractCegarLoop]: Abstraction has 591 states and 2124 transitions. [2021-06-05 22:28:46,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:46,731 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 2124 transitions. [2021-06-05 22:28:46,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:28:46,732 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:46,732 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:46,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-05 22:28:46,734 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:46,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:46,734 INFO L82 PathProgramCache]: Analyzing trace with hash -206582261, now seen corresponding path program 5 times [2021-06-05 22:28:46,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:46,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575806867] [2021-06-05 22:28:46,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:46,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:46,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:46,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:46,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575806867] [2021-06-05 22:28:46,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575806867] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:28:46,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:28:46,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:28:46,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221725183] [2021-06-05 22:28:46,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:28:46,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:46,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:28:46,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:28:46,758 INFO L87 Difference]: Start difference. First operand 591 states and 2124 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:46,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:46,820 INFO L93 Difference]: Finished difference Result 783 states and 2748 transitions. [2021-06-05 22:28:46,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:28:46,821 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:28:46,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:46,825 INFO L225 Difference]: With dead ends: 783 [2021-06-05 22:28:46,825 INFO L226 Difference]: Without dead ends: 783 [2021-06-05 22:28:46,825 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:28:46,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2021-06-05 22:28:46,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 582. [2021-06-05 22:28:46,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 581 states have (on average 3.604130808950086) internal successors, (2094), 581 states have internal predecessors, (2094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:46,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 2094 transitions. [2021-06-05 22:28:46,841 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 2094 transitions. Word has length 24 [2021-06-05 22:28:46,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:46,841 INFO L482 AbstractCegarLoop]: Abstraction has 582 states and 2094 transitions. [2021-06-05 22:28:46,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:46,841 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 2094 transitions. [2021-06-05 22:28:46,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:28:46,843 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:46,843 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:46,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-05 22:28:46,843 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:46,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:46,843 INFO L82 PathProgramCache]: Analyzing trace with hash 831548115, now seen corresponding path program 6 times [2021-06-05 22:28:46,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:46,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684018247] [2021-06-05 22:28:46,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:46,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:46,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:46,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:46,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684018247] [2021-06-05 22:28:46,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684018247] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:28:46,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:28:46,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:28:46,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688576536] [2021-06-05 22:28:46,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:28:46,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:46,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:28:46,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:28:46,883 INFO L87 Difference]: Start difference. First operand 582 states and 2094 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:46,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:46,952 INFO L93 Difference]: Finished difference Result 597 states and 2122 transitions. [2021-06-05 22:28:46,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 22:28:46,952 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:28:46,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:46,956 INFO L225 Difference]: With dead ends: 597 [2021-06-05 22:28:46,956 INFO L226 Difference]: Without dead ends: 565 [2021-06-05 22:28:46,956 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 29.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:28:46,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-06-05 22:28:46,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 565. [2021-06-05 22:28:46,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 564 states have (on average 3.6382978723404253) internal successors, (2052), 564 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:46,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 2052 transitions. [2021-06-05 22:28:46,971 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 2052 transitions. Word has length 24 [2021-06-05 22:28:46,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:46,972 INFO L482 AbstractCegarLoop]: Abstraction has 565 states and 2052 transitions. [2021-06-05 22:28:46,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:46,972 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 2052 transitions. [2021-06-05 22:28:46,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 22:28:46,973 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:46,973 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:46,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-06-05 22:28:46,974 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:46,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:46,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1474843077, now seen corresponding path program 6 times [2021-06-05 22:28:46,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:46,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165459704] [2021-06-05 22:28:46,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:46,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:46,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:46,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:46,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165459704] [2021-06-05 22:28:46,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165459704] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:28:46,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:28:46,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 22:28:46,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965192905] [2021-06-05 22:28:46,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 22:28:46,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:46,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 22:28:46,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 22:28:46,996 INFO L87 Difference]: Start difference. First operand 565 states and 2052 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:47,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:47,052 INFO L93 Difference]: Finished difference Result 595 states and 2146 transitions. [2021-06-05 22:28:47,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 22:28:47,053 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 22:28:47,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:47,055 INFO L225 Difference]: With dead ends: 595 [2021-06-05 22:28:47,055 INFO L226 Difference]: Without dead ends: 595 [2021-06-05 22:28:47,055 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 22:28:47,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-06-05 22:28:47,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 487. [2021-06-05 22:28:47,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 3.625514403292181) internal successors, (1762), 486 states have internal predecessors, (1762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:47,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1762 transitions. [2021-06-05 22:28:47,069 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1762 transitions. Word has length 24 [2021-06-05 22:28:47,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:47,070 INFO L482 AbstractCegarLoop]: Abstraction has 487 states and 1762 transitions. [2021-06-05 22:28:47,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:47,070 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1762 transitions. [2021-06-05 22:28:47,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:28:47,071 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:47,071 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:47,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-06-05 22:28:47,071 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:47,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:47,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1291494568, now seen corresponding path program 1 times [2021-06-05 22:28:47,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:47,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946484611] [2021-06-05 22:28:47,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:47,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:47,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:47,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:47,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946484611] [2021-06-05 22:28:47,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946484611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:47,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039079112] [2021-06-05 22:28:47,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:47,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:47,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:28:47,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:47,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:28:47,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 22:28:47,482 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:28:47,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:28:47,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:28:47,492 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-05 22:28:47,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:47,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039079112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:47,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:47,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 22:28:47,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280468784] [2021-06-05 22:28:47,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:28:47,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:47,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:28:47,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:28:47,545 INFO L87 Difference]: Start difference. First operand 487 states and 1762 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:47,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:47,953 INFO L93 Difference]: Finished difference Result 985 states and 3663 transitions. [2021-06-05 22:28:47,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:28:47,954 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:28:47,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:47,962 INFO L225 Difference]: With dead ends: 985 [2021-06-05 22:28:47,963 INFO L226 Difference]: Without dead ends: 904 [2021-06-05 22:28:47,963 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 248.7ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:28:47,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2021-06-05 22:28:47,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 559. [2021-06-05 22:28:47,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 558 states have (on average 3.6469534050179213) internal successors, (2035), 558 states have internal predecessors, (2035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:47,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 2035 transitions. [2021-06-05 22:28:47,994 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 2035 transitions. Word has length 26 [2021-06-05 22:28:47,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:47,994 INFO L482 AbstractCegarLoop]: Abstraction has 559 states and 2035 transitions. [2021-06-05 22:28:47,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:47,994 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 2035 transitions. [2021-06-05 22:28:47,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:28:47,995 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:47,996 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:48,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:48,218 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:48,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:48,219 INFO L82 PathProgramCache]: Analyzing trace with hash 13244826, now seen corresponding path program 1 times [2021-06-05 22:28:48,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:48,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686241260] [2021-06-05 22:28:48,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:48,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:48,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:48,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:48,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686241260] [2021-06-05 22:28:48,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686241260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:48,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464550722] [2021-06-05 22:28:48,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:48,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:48,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:28:48,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:48,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:28:48,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 22:28:48,614 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:28:48,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:28:48,625 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:28:48,625 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-05 22:28:48,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:48,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464550722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:48,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:48,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 22:28:48,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103198742] [2021-06-05 22:28:48,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:28:48,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:48,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:28:48,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:28:48,670 INFO L87 Difference]: Start difference. First operand 559 states and 2035 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:49,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:49,089 INFO L93 Difference]: Finished difference Result 985 states and 3680 transitions. [2021-06-05 22:28:49,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:28:49,089 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:28:49,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:49,092 INFO L225 Difference]: With dead ends: 985 [2021-06-05 22:28:49,092 INFO L226 Difference]: Without dead ends: 904 [2021-06-05 22:28:49,092 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 232.3ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:28:49,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2021-06-05 22:28:49,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 569. [2021-06-05 22:28:49,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 568 states have (on average 3.653169014084507) internal successors, (2075), 568 states have internal predecessors, (2075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:49,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 2075 transitions. [2021-06-05 22:28:49,108 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 2075 transitions. Word has length 26 [2021-06-05 22:28:49,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:49,109 INFO L482 AbstractCegarLoop]: Abstraction has 569 states and 2075 transitions. [2021-06-05 22:28:49,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:49,109 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 2075 transitions. [2021-06-05 22:28:49,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:28:49,110 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:49,110 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:49,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 22:28:49,333 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:49,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:49,333 INFO L82 PathProgramCache]: Analyzing trace with hash -848673696, now seen corresponding path program 2 times [2021-06-05 22:28:49,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:49,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307296939] [2021-06-05 22:28:49,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:49,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:49,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:28:49,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:49,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307296939] [2021-06-05 22:28:49,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307296939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:49,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544706430] [2021-06-05 22:28:49,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:49,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:28:49,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:49,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:28:49,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:49,583 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:28:49,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 22:28:49,585 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:28:49,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:28:49,597 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:28:49,597 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 22:28:49,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:49,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544706430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:49,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:49,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 22:28:49,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126404495] [2021-06-05 22:28:49,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:28:49,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:49,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:28:49,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:28:49,736 INFO L87 Difference]: Start difference. First operand 569 states and 2075 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:51,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:51,026 INFO L93 Difference]: Finished difference Result 2058 states and 7632 transitions. [2021-06-05 22:28:51,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:28:51,027 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:28:51,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:51,033 INFO L225 Difference]: With dead ends: 2058 [2021-06-05 22:28:51,033 INFO L226 Difference]: Without dead ends: 1785 [2021-06-05 22:28:51,034 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 930.3ms TimeCoverageRelationStatistics Valid=306, Invalid=1100, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:28:51,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1785 states. [2021-06-05 22:28:51,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1785 to 654. [2021-06-05 22:28:51,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 653 states have (on average 3.7304747320061256) internal successors, (2436), 653 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:51,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 2436 transitions. [2021-06-05 22:28:51,058 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 2436 transitions. Word has length 26 [2021-06-05 22:28:51,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:51,059 INFO L482 AbstractCegarLoop]: Abstraction has 654 states and 2436 transitions. [2021-06-05 22:28:51,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:51,059 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 2436 transitions. [2021-06-05 22:28:51,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:28:51,061 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:51,061 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:51,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:51,277 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:51,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:51,277 INFO L82 PathProgramCache]: Analyzing trace with hash 704098248, now seen corresponding path program 3 times [2021-06-05 22:28:51,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:51,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220402151] [2021-06-05 22:28:51,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:51,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:51,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:28:51,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:51,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220402151] [2021-06-05 22:28:51,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220402151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:51,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318358719] [2021-06-05 22:28:51,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:51,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:28:51,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:51,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:28:51,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:51,532 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:28:51,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 22:28:51,534 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:28:51,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:28:51,551 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:28:51,551 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 22:28:51,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:51,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318358719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:51,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:51,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 22:28:51,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229124168] [2021-06-05 22:28:51,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:28:51,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:51,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:28:51,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:28:51,683 INFO L87 Difference]: Start difference. First operand 654 states and 2436 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:53,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:53,013 INFO L93 Difference]: Finished difference Result 2227 states and 8282 transitions. [2021-06-05 22:28:53,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 22:28:53,013 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:28:53,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:53,019 INFO L225 Difference]: With dead ends: 2227 [2021-06-05 22:28:53,019 INFO L226 Difference]: Without dead ends: 1955 [2021-06-05 22:28:53,020 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 932.4ms TimeCoverageRelationStatistics Valid=319, Invalid=1163, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:28:53,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1955 states. [2021-06-05 22:28:53,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1955 to 695. [2021-06-05 22:28:53,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 694 states have (on average 3.80835734870317) internal successors, (2643), 694 states have internal predecessors, (2643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:53,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 2643 transitions. [2021-06-05 22:28:53,045 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 2643 transitions. Word has length 26 [2021-06-05 22:28:53,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:53,045 INFO L482 AbstractCegarLoop]: Abstraction has 695 states and 2643 transitions. [2021-06-05 22:28:53,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:53,046 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 2643 transitions. [2021-06-05 22:28:53,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:28:53,048 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:53,048 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:53,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:53,270 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:53,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:53,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1279803746, now seen corresponding path program 2 times [2021-06-05 22:28:53,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:53,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955030187] [2021-06-05 22:28:53,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:53,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:53,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:53,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:53,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955030187] [2021-06-05 22:28:53,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955030187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:53,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63745685] [2021-06-05 22:28:53,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:53,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:28:53,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:53,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:28:53,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:53,499 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:28:53,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 22:28:53,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:28:53,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:28:53,511 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:28:53,511 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 22:28:53,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:53,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63745685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:53,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:53,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 22:28:53,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506981951] [2021-06-05 22:28:53,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:28:53,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:53,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:28:53,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:28:53,658 INFO L87 Difference]: Start difference. First operand 695 states and 2643 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:54,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:54,751 INFO L93 Difference]: Finished difference Result 1519 states and 5838 transitions. [2021-06-05 22:28:54,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:28:54,752 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:28:54,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:54,756 INFO L225 Difference]: With dead ends: 1519 [2021-06-05 22:28:54,757 INFO L226 Difference]: Without dead ends: 1446 [2021-06-05 22:28:54,757 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 781.1ms TimeCoverageRelationStatistics Valid=260, Invalid=1000, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:28:54,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1446 states. [2021-06-05 22:28:54,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1446 to 706. [2021-06-05 22:28:54,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 705 states have (on average 3.819858156028369) internal successors, (2693), 705 states have internal predecessors, (2693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:54,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 2693 transitions. [2021-06-05 22:28:54,779 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 2693 transitions. Word has length 26 [2021-06-05 22:28:54,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:54,779 INFO L482 AbstractCegarLoop]: Abstraction has 706 states and 2693 transitions. [2021-06-05 22:28:54,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:54,779 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 2693 transitions. [2021-06-05 22:28:54,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:28:54,781 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:54,781 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:54,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 22:28:54,997 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:54,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:54,997 INFO L82 PathProgramCache]: Analyzing trace with hash -115783330, now seen corresponding path program 3 times [2021-06-05 22:28:54,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:54,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967137025] [2021-06-05 22:28:54,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:55,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:55,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:55,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:55,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967137025] [2021-06-05 22:28:55,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967137025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:55,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905117184] [2021-06-05 22:28:55,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:55,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:28:55,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:55,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:28:55,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:55,225 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:28:55,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 22:28:55,241 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:28:55,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:28:55,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:28:55,253 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 22:28:55,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:55,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905117184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:55,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:55,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 22:28:55,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723678644] [2021-06-05 22:28:55,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:28:55,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:55,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:28:55,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:28:55,389 INFO L87 Difference]: Start difference. First operand 706 states and 2693 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:56,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:56,655 INFO L93 Difference]: Finished difference Result 1567 states and 6047 transitions. [2021-06-05 22:28:56,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:28:56,655 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:28:56,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:56,659 INFO L225 Difference]: With dead ends: 1567 [2021-06-05 22:28:56,660 INFO L226 Difference]: Without dead ends: 1484 [2021-06-05 22:28:56,660 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 910.0ms TimeCoverageRelationStatistics Valid=319, Invalid=1241, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:28:56,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1484 states. [2021-06-05 22:28:56,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1484 to 704. [2021-06-05 22:28:56,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 703 states have (on average 3.8207681365576103) internal successors, (2686), 703 states have internal predecessors, (2686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:56,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 2686 transitions. [2021-06-05 22:28:56,681 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 2686 transitions. Word has length 26 [2021-06-05 22:28:56,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:56,682 INFO L482 AbstractCegarLoop]: Abstraction has 704 states and 2686 transitions. [2021-06-05 22:28:56,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:56,683 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 2686 transitions. [2021-06-05 22:28:56,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:28:56,684 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:56,685 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:56,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:56,911 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:56,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:56,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1792060410, now seen corresponding path program 1 times [2021-06-05 22:28:56,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:56,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743107393] [2021-06-05 22:28:56,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:56,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:56,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:56,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:56,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743107393] [2021-06-05 22:28:56,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743107393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:56,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770539015] [2021-06-05 22:28:56,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:57,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:57,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:28:57,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:57,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:28:57,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:28:57,114 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:28:57,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:28:57,123 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:28:57,123 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 22:28:57,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:57,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770539015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:57,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:57,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:28:57,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973829802] [2021-06-05 22:28:57,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:28:57,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:57,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:28:57,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:28:57,183 INFO L87 Difference]: Start difference. First operand 704 states and 2686 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:57,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:57,401 INFO L93 Difference]: Finished difference Result 1121 states and 4306 transitions. [2021-06-05 22:28:57,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:28:57,401 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:28:57,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:57,404 INFO L225 Difference]: With dead ends: 1121 [2021-06-05 22:28:57,404 INFO L226 Difference]: Without dead ends: 1039 [2021-06-05 22:28:57,404 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 164.9ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:28:57,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2021-06-05 22:28:57,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 733. [2021-06-05 22:28:57,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 732 states have (on average 3.8278688524590163) internal successors, (2802), 732 states have internal predecessors, (2802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:57,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 2802 transitions. [2021-06-05 22:28:57,421 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 2802 transitions. Word has length 26 [2021-06-05 22:28:57,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:57,421 INFO L482 AbstractCegarLoop]: Abstraction has 733 states and 2802 transitions. [2021-06-05 22:28:57,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:57,421 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 2802 transitions. [2021-06-05 22:28:57,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:28:57,423 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:57,423 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:57,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 22:28:57,637 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:57,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:57,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1071626942, now seen corresponding path program 2 times [2021-06-05 22:28:57,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:57,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977048453] [2021-06-05 22:28:57,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:57,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:57,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:57,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:57,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977048453] [2021-06-05 22:28:57,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977048453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:57,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488078676] [2021-06-05 22:28:57,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:57,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:28:57,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:57,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:28:57,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:57,861 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:28:57,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 22:28:57,863 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:28:57,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:28:57,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:28:57,881 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:38 [2021-06-05 22:28:58,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:58,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488078676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:58,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:58,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 22:28:58,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917104481] [2021-06-05 22:28:58,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:28:58,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:58,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:28:58,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:28:58,025 INFO L87 Difference]: Start difference. First operand 733 states and 2802 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:58,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:28:58,744 INFO L93 Difference]: Finished difference Result 1208 states and 4645 transitions. [2021-06-05 22:28:58,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:28:58,744 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:28:58,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:28:58,747 INFO L225 Difference]: With dead ends: 1208 [2021-06-05 22:28:58,747 INFO L226 Difference]: Without dead ends: 1135 [2021-06-05 22:28:58,747 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 562.3ms TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:28:58,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1135 states. [2021-06-05 22:28:58,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1135 to 731. [2021-06-05 22:28:58,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 730 states have (on average 3.828767123287671) internal successors, (2795), 730 states have internal predecessors, (2795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:58,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 2795 transitions. [2021-06-05 22:28:58,765 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 2795 transitions. Word has length 26 [2021-06-05 22:28:58,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:28:58,765 INFO L482 AbstractCegarLoop]: Abstraction has 731 states and 2795 transitions. [2021-06-05 22:28:58,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:28:58,765 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 2795 transitions. [2021-06-05 22:28:58,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:28:58,767 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:28:58,767 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:28:58,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 22:28:58,981 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:28:58,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:28:58,981 INFO L82 PathProgramCache]: Analyzing trace with hash -126478080, now seen corresponding path program 3 times [2021-06-05 22:28:58,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:28:58,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872952887] [2021-06-05 22:28:58,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:28:58,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:28:59,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:59,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:28:59,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872952887] [2021-06-05 22:28:59,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872952887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:59,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598000288] [2021-06-05 22:28:59,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:28:59,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:28:59,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:28:59,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:28:59,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:28:59,274 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:28:59,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 22:28:59,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:28:59,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:28:59,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:28:59,297 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:35 [2021-06-05 22:28:59,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:28:59,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598000288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:28:59,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:28:59,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 22:28:59,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376472807] [2021-06-05 22:28:59,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:28:59,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:28:59,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:28:59,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:28:59,393 INFO L87 Difference]: Start difference. First operand 731 states and 2795 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:00,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:00,046 INFO L93 Difference]: Finished difference Result 1248 states and 4784 transitions. [2021-06-05 22:29:00,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:29:00,046 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:29:00,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:00,050 INFO L225 Difference]: With dead ends: 1248 [2021-06-05 22:29:00,050 INFO L226 Difference]: Without dead ends: 1177 [2021-06-05 22:29:00,050 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 478.9ms TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:29:00,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2021-06-05 22:29:00,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 755. [2021-06-05 22:29:00,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 754 states have (on average 3.815649867374005) internal successors, (2877), 754 states have internal predecessors, (2877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:00,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 2877 transitions. [2021-06-05 22:29:00,069 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 2877 transitions. Word has length 26 [2021-06-05 22:29:00,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:00,069 INFO L482 AbstractCegarLoop]: Abstraction has 755 states and 2877 transitions. [2021-06-05 22:29:00,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:00,069 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 2877 transitions. [2021-06-05 22:29:00,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:29:00,071 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:00,071 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:00,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:00,294 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:00,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:00,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1178261314, now seen corresponding path program 1 times [2021-06-05 22:29:00,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:00,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304136902] [2021-06-05 22:29:00,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:00,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:00,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:00,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:00,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304136902] [2021-06-05 22:29:00,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304136902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:00,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821355139] [2021-06-05 22:29:00,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:00,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:00,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:29:00,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:00,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:29:00,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 22:29:00,580 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:29:00,585 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:00,586 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:00,587 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-05 22:29:00,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:00,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821355139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:00,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:00,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 22:29:00,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012638278] [2021-06-05 22:29:00,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:29:00,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:00,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:29:00,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:29:00,621 INFO L87 Difference]: Start difference. First operand 755 states and 2877 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:00,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:00,924 INFO L93 Difference]: Finished difference Result 1113 states and 4258 transitions. [2021-06-05 22:29:00,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:29:00,925 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:29:00,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:00,927 INFO L225 Difference]: With dead ends: 1113 [2021-06-05 22:29:00,927 INFO L226 Difference]: Without dead ends: 1042 [2021-06-05 22:29:00,928 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 178.7ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:29:00,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2021-06-05 22:29:00,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 731. [2021-06-05 22:29:00,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 730 states have (on average 3.828767123287671) internal successors, (2795), 730 states have internal predecessors, (2795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:00,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 2795 transitions. [2021-06-05 22:29:00,944 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 2795 transitions. Word has length 26 [2021-06-05 22:29:00,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:00,944 INFO L482 AbstractCegarLoop]: Abstraction has 731 states and 2795 transitions. [2021-06-05 22:29:00,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:00,944 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 2795 transitions. [2021-06-05 22:29:00,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:29:00,946 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:00,946 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:01,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 22:29:01,167 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:01,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:01,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1995337340, now seen corresponding path program 2 times [2021-06-05 22:29:01,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:01,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643938340] [2021-06-05 22:29:01,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:01,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:01,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:01,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:01,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643938340] [2021-06-05 22:29:01,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643938340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:01,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293663884] [2021-06-05 22:29:01,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:01,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:29:01,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:01,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:29:01,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:01,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:29:01,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:29:01,377 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:29:01,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:01,386 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:01,386 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 22:29:01,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:01,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293663884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:01,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:01,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:29:01,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126223537] [2021-06-05 22:29:01,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:29:01,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:01,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:29:01,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:29:01,440 INFO L87 Difference]: Start difference. First operand 731 states and 2795 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:01,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:01,679 INFO L93 Difference]: Finished difference Result 1082 states and 4150 transitions. [2021-06-05 22:29:01,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:29:01,679 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:29:01,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:01,681 INFO L225 Difference]: With dead ends: 1082 [2021-06-05 22:29:01,681 INFO L226 Difference]: Without dead ends: 1009 [2021-06-05 22:29:01,681 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 169.4ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:29:01,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2021-06-05 22:29:01,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 740. [2021-06-05 22:29:01,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 3.8335588633288227) internal successors, (2833), 739 states have internal predecessors, (2833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:01,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 2833 transitions. [2021-06-05 22:29:01,697 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 2833 transitions. Word has length 26 [2021-06-05 22:29:01,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:01,697 INFO L482 AbstractCegarLoop]: Abstraction has 740 states and 2833 transitions. [2021-06-05 22:29:01,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:01,697 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 2833 transitions. [2021-06-05 22:29:01,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:29:01,699 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:01,699 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:01,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:01,921 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:01,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:01,921 INFO L82 PathProgramCache]: Analyzing trace with hash -489476008, now seen corresponding path program 3 times [2021-06-05 22:29:01,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:01,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118141121] [2021-06-05 22:29:01,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:01,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:01,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:01,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:01,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118141121] [2021-06-05 22:29:01,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118141121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:01,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578052855] [2021-06-05 22:29:01,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:02,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:29:02,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:02,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:29:02,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:02,167 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:02,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 22:29:02,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:29:02,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:02,183 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:02,183 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:38 [2021-06-05 22:29:02,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:02,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578052855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:02,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:02,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 22:29:02,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855842712] [2021-06-05 22:29:02,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:29:02,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:02,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:29:02,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:29:02,302 INFO L87 Difference]: Start difference. First operand 740 states and 2833 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:03,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:03,040 INFO L93 Difference]: Finished difference Result 1158 states and 4457 transitions. [2021-06-05 22:29:03,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:29:03,040 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:29:03,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:03,043 INFO L225 Difference]: With dead ends: 1158 [2021-06-05 22:29:03,043 INFO L226 Difference]: Without dead ends: 1083 [2021-06-05 22:29:03,043 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 553.3ms TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:29:03,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2021-06-05 22:29:03,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 736. [2021-06-05 22:29:03,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 735 states have (on average 3.83265306122449) internal successors, (2817), 735 states have internal predecessors, (2817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:03,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 2817 transitions. [2021-06-05 22:29:03,061 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 2817 transitions. Word has length 26 [2021-06-05 22:29:03,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:03,061 INFO L482 AbstractCegarLoop]: Abstraction has 736 states and 2817 transitions. [2021-06-05 22:29:03,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:03,061 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 2817 transitions. [2021-06-05 22:29:03,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:29:03,063 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:03,063 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:03,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 22:29:03,277 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:03,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:03,277 INFO L82 PathProgramCache]: Analyzing trace with hash 197192494, now seen corresponding path program 4 times [2021-06-05 22:29:03,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:03,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072737070] [2021-06-05 22:29:03,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:03,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:03,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:03,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:03,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072737070] [2021-06-05 22:29:03,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072737070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:03,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517960605] [2021-06-05 22:29:03,367 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:03,401 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:29:03,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:03,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:29:03,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:03,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:29:03,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:29:03,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:29:03,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:03,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:03,476 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-06-05 22:29:03,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:03,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517960605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:03,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:03,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:29:03,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873693603] [2021-06-05 22:29:03,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:29:03,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:03,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:29:03,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:29:03,517 INFO L87 Difference]: Start difference. First operand 736 states and 2817 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:03,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:03,898 INFO L93 Difference]: Finished difference Result 1414 states and 5349 transitions. [2021-06-05 22:29:03,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:29:03,898 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:29:03,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:03,901 INFO L225 Difference]: With dead ends: 1414 [2021-06-05 22:29:03,902 INFO L226 Difference]: Without dead ends: 1323 [2021-06-05 22:29:03,902 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 191.2ms TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:29:03,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1323 states. [2021-06-05 22:29:03,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1323 to 814. [2021-06-05 22:29:03,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 813 states have (on average 3.88929889298893) internal successors, (3162), 813 states have internal predecessors, (3162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:03,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 3162 transitions. [2021-06-05 22:29:03,921 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 3162 transitions. Word has length 26 [2021-06-05 22:29:03,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:03,921 INFO L482 AbstractCegarLoop]: Abstraction has 814 states and 3162 transitions. [2021-06-05 22:29:03,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:03,921 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 3162 transitions. [2021-06-05 22:29:03,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:29:03,923 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:03,923 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:04,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:04,145 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:04,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:04,146 INFO L82 PathProgramCache]: Analyzing trace with hash -389275864, now seen corresponding path program 4 times [2021-06-05 22:29:04,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:04,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708043702] [2021-06-05 22:29:04,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:04,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:04,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:04,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:04,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708043702] [2021-06-05 22:29:04,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708043702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:04,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611609614] [2021-06-05 22:29:04,249 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:04,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:29:04,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:04,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:29:04,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:04,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:29:04,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:29:04,369 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:29:04,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:04,377 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:04,377 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-06-05 22:29:04,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:04,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611609614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:04,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:04,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:29:04,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353147177] [2021-06-05 22:29:04,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:29:04,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:04,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:29:04,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:29:04,423 INFO L87 Difference]: Start difference. First operand 814 states and 3162 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:04,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:04,708 INFO L93 Difference]: Finished difference Result 1224 states and 4746 transitions. [2021-06-05 22:29:04,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:29:04,708 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:29:04,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:04,710 INFO L225 Difference]: With dead ends: 1224 [2021-06-05 22:29:04,710 INFO L226 Difference]: Without dead ends: 1142 [2021-06-05 22:29:04,710 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 203.5ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:29:04,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2021-06-05 22:29:04,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 814. [2021-06-05 22:29:04,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 813 states have (on average 3.88929889298893) internal successors, (3162), 813 states have internal predecessors, (3162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:04,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 3162 transitions. [2021-06-05 22:29:04,726 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 3162 transitions. Word has length 26 [2021-06-05 22:29:04,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:04,726 INFO L482 AbstractCegarLoop]: Abstraction has 814 states and 3162 transitions. [2021-06-05 22:29:04,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:04,727 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 3162 transitions. [2021-06-05 22:29:04,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:29:04,729 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:04,729 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:04,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-05 22:29:04,929 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:04,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:04,930 INFO L82 PathProgramCache]: Analyzing trace with hash 112793720, now seen corresponding path program 5 times [2021-06-05 22:29:04,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:04,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278258934] [2021-06-05 22:29:04,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:04,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:05,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:05,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:05,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278258934] [2021-06-05 22:29:05,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278258934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:05,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612352265] [2021-06-05 22:29:05,031 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:05,066 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:29:05,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:05,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:29:05,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:05,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:29:05,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:29:05,145 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:29:05,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:05,155 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:05,155 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 22:29:05,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:05,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612352265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:05,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:05,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:29:05,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179641205] [2021-06-05 22:29:05,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:29:05,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:05,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:29:05,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:29:05,212 INFO L87 Difference]: Start difference. First operand 814 states and 3162 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:05,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:05,553 INFO L93 Difference]: Finished difference Result 1332 states and 5142 transitions. [2021-06-05 22:29:05,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:29:05,554 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:29:05,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:05,556 INFO L225 Difference]: With dead ends: 1332 [2021-06-05 22:29:05,556 INFO L226 Difference]: Without dead ends: 1241 [2021-06-05 22:29:05,556 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 215.0ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:29:05,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2021-06-05 22:29:05,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 832. [2021-06-05 22:29:05,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 831 states have (on average 3.931407942238267) internal successors, (3267), 831 states have internal predecessors, (3267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:05,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 3267 transitions. [2021-06-05 22:29:05,573 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 3267 transitions. Word has length 26 [2021-06-05 22:29:05,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:05,573 INFO L482 AbstractCegarLoop]: Abstraction has 832 states and 3267 transitions. [2021-06-05 22:29:05,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:05,574 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 3267 transitions. [2021-06-05 22:29:05,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:29:05,575 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:05,575 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:05,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 22:29:05,791 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:05,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:05,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1004083728, now seen corresponding path program 6 times [2021-06-05 22:29:05,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:05,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139148279] [2021-06-05 22:29:05,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:05,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:05,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:05,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:05,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139148279] [2021-06-05 22:29:05,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139148279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:05,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797682463] [2021-06-05 22:29:05,890 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:05,928 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:29:05,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:05,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:29:05,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:05,991 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:05,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 22:29:05,992 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:29:06,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:06,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:06,004 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:32 [2021-06-05 22:29:06,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:06,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797682463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:06,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:06,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 22:29:06,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587389183] [2021-06-05 22:29:06,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:29:06,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:06,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:29:06,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:29:06,118 INFO L87 Difference]: Start difference. First operand 832 states and 3267 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:07,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:07,154 INFO L93 Difference]: Finished difference Result 1857 states and 7226 transitions. [2021-06-05 22:29:07,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:29:07,155 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:29:07,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:07,157 INFO L225 Difference]: With dead ends: 1857 [2021-06-05 22:29:07,158 INFO L226 Difference]: Without dead ends: 1694 [2021-06-05 22:29:07,158 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 752.4ms TimeCoverageRelationStatistics Valid=217, Invalid=839, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:29:07,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1694 states. [2021-06-05 22:29:07,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1694 to 856. [2021-06-05 22:29:07,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 855 states have (on average 3.9742690058479533) internal successors, (3398), 855 states have internal predecessors, (3398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:07,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 3398 transitions. [2021-06-05 22:29:07,180 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 3398 transitions. Word has length 26 [2021-06-05 22:29:07,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:07,180 INFO L482 AbstractCegarLoop]: Abstraction has 856 states and 3398 transitions. [2021-06-05 22:29:07,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:07,180 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 3398 transitions. [2021-06-05 22:29:07,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:29:07,182 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:07,182 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:07,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 22:29:07,397 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:07,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:07,397 INFO L82 PathProgramCache]: Analyzing trace with hash -317823172, now seen corresponding path program 5 times [2021-06-05 22:29:07,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:07,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912212201] [2021-06-05 22:29:07,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:07,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:07,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:07,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:07,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912212201] [2021-06-05 22:29:07,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912212201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:07,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556940807] [2021-06-05 22:29:07,475 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:07,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:29:07,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:07,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:29:07,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:07,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:29:07,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:29:07,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:29:07,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:07,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:07,584 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 22:29:07,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:07,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556940807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:07,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:07,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:29:07,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13224931] [2021-06-05 22:29:07,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:29:07,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:07,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:29:07,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:29:07,645 INFO L87 Difference]: Start difference. First operand 856 states and 3398 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:07,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:07,822 INFO L93 Difference]: Finished difference Result 1245 states and 4901 transitions. [2021-06-05 22:29:07,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:29:07,823 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:29:07,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:07,825 INFO L225 Difference]: With dead ends: 1245 [2021-06-05 22:29:07,825 INFO L226 Difference]: Without dead ends: 1163 [2021-06-05 22:29:07,825 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 171.7ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:29:07,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2021-06-05 22:29:07,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 865. [2021-06-05 22:29:07,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 864 states have (on average 3.9756944444444446) internal successors, (3435), 864 states have internal predecessors, (3435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:07,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 3435 transitions. [2021-06-05 22:29:07,841 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 3435 transitions. Word has length 26 [2021-06-05 22:29:07,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:07,841 INFO L482 AbstractCegarLoop]: Abstraction has 865 states and 3435 transitions. [2021-06-05 22:29:07,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:07,842 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 3435 transitions. [2021-06-05 22:29:07,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:29:07,843 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:07,843 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:08,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 22:29:08,052 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:08,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:08,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1699738576, now seen corresponding path program 6 times [2021-06-05 22:29:08,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:08,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592649876] [2021-06-05 22:29:08,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:08,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:08,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:08,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:08,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592649876] [2021-06-05 22:29:08,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592649876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:08,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742381702] [2021-06-05 22:29:08,131 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:08,174 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:29:08,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:08,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:29:08,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:08,242 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:08,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 22:29:08,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:29:08,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:08,257 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:08,258 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:32 [2021-06-05 22:29:08,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:08,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742381702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:08,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:08,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 22:29:08,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102846667] [2021-06-05 22:29:08,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:29:08,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:08,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:29:08,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:29:08,363 INFO L87 Difference]: Start difference. First operand 865 states and 3435 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:09,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:09,592 INFO L93 Difference]: Finished difference Result 1646 states and 6434 transitions. [2021-06-05 22:29:09,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:29:09,592 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:29:09,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:09,595 INFO L225 Difference]: With dead ends: 1646 [2021-06-05 22:29:09,595 INFO L226 Difference]: Without dead ends: 1573 [2021-06-05 22:29:09,595 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 887.3ms TimeCoverageRelationStatistics Valid=306, Invalid=1100, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:29:09,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1573 states. [2021-06-05 22:29:09,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1573 to 856. [2021-06-05 22:29:09,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 855 states have (on average 3.9742690058479533) internal successors, (3398), 855 states have internal predecessors, (3398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:09,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 3398 transitions. [2021-06-05 22:29:09,613 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 3398 transitions. Word has length 26 [2021-06-05 22:29:09,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:09,614 INFO L482 AbstractCegarLoop]: Abstraction has 856 states and 3398 transitions. [2021-06-05 22:29:09,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:09,614 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 3398 transitions. [2021-06-05 22:29:09,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:29:09,616 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:09,616 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:09,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:09,829 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:09,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:09,829 INFO L82 PathProgramCache]: Analyzing trace with hash -248765392, now seen corresponding path program 4 times [2021-06-05 22:29:09,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:09,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093921601] [2021-06-05 22:29:09,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:09,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:09,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:09,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:09,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093921601] [2021-06-05 22:29:09,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093921601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:09,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976529907] [2021-06-05 22:29:09,899 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:09,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:29:09,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:09,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:29:09,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:10,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:29:10,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:29:10,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:29:10,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:10,021 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:10,021 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-06-05 22:29:10,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:10,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976529907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:10,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:10,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:29:10,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176639674] [2021-06-05 22:29:10,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:29:10,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:10,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:29:10,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:29:10,059 INFO L87 Difference]: Start difference. First operand 856 states and 3398 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:10,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:10,293 INFO L93 Difference]: Finished difference Result 1278 states and 4997 transitions. [2021-06-05 22:29:10,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:29:10,293 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:29:10,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:10,296 INFO L225 Difference]: With dead ends: 1278 [2021-06-05 22:29:10,296 INFO L226 Difference]: Without dead ends: 1205 [2021-06-05 22:29:10,296 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 168.8ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:29:10,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2021-06-05 22:29:10,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 892. [2021-06-05 22:29:10,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 3.9551066217732886) internal successors, (3524), 891 states have internal predecessors, (3524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:10,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 3524 transitions. [2021-06-05 22:29:10,314 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 3524 transitions. Word has length 26 [2021-06-05 22:29:10,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:10,314 INFO L482 AbstractCegarLoop]: Abstraction has 892 states and 3524 transitions. [2021-06-05 22:29:10,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:10,314 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 3524 transitions. [2021-06-05 22:29:10,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:29:10,316 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:10,316 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:10,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:10,539 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:10,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:10,539 INFO L82 PathProgramCache]: Analyzing trace with hash -959064550, now seen corresponding path program 4 times [2021-06-05 22:29:10,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:10,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137984006] [2021-06-05 22:29:10,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:10,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:10,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:10,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:10,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137984006] [2021-06-05 22:29:10,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137984006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:10,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179339692] [2021-06-05 22:29:10,629 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:10,665 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:29:10,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:10,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:29:10,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:10,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:29:10,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:29:10,734 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:29:10,740 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:10,741 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:10,741 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-06-05 22:29:10,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:10,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179339692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:10,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:10,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:29:10,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783452021] [2021-06-05 22:29:10,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:29:10,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:10,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:29:10,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:29:10,777 INFO L87 Difference]: Start difference. First operand 892 states and 3524 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:11,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:11,042 INFO L93 Difference]: Finished difference Result 1234 states and 4842 transitions. [2021-06-05 22:29:11,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:29:11,043 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:29:11,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:11,045 INFO L225 Difference]: With dead ends: 1234 [2021-06-05 22:29:11,045 INFO L226 Difference]: Without dead ends: 1161 [2021-06-05 22:29:11,045 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 181.9ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:29:11,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2021-06-05 22:29:11,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 868. [2021-06-05 22:29:11,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 3.980392156862745) internal successors, (3451), 867 states have internal predecessors, (3451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:11,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 3451 transitions. [2021-06-05 22:29:11,058 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 3451 transitions. Word has length 26 [2021-06-05 22:29:11,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:11,059 INFO L482 AbstractCegarLoop]: Abstraction has 868 states and 3451 transitions. [2021-06-05 22:29:11,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:11,059 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 3451 transitions. [2021-06-05 22:29:11,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:29:11,061 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:11,061 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:11,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-06-05 22:29:11,276 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:11,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:11,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1223906964, now seen corresponding path program 5 times [2021-06-05 22:29:11,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:11,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898609614] [2021-06-05 22:29:11,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:11,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:11,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:11,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:11,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898609614] [2021-06-05 22:29:11,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898609614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:11,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261760044] [2021-06-05 22:29:11,349 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:11,392 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:29:11,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:11,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:29:11,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:11,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:29:11,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:29:11,445 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:29:11,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:11,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:11,453 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 22:29:11,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:11,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261760044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:11,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:11,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:29:11,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001531294] [2021-06-05 22:29:11,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:29:11,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:11,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:29:11,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:29:11,512 INFO L87 Difference]: Start difference. First operand 868 states and 3451 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:11,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:11,773 INFO L93 Difference]: Finished difference Result 1243 states and 4884 transitions. [2021-06-05 22:29:11,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:29:11,773 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:29:11,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:11,775 INFO L225 Difference]: With dead ends: 1243 [2021-06-05 22:29:11,775 INFO L226 Difference]: Without dead ends: 1170 [2021-06-05 22:29:11,775 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 160.2ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:29:11,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2021-06-05 22:29:11,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 877. [2021-06-05 22:29:11,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 876 states have (on average 3.9817351598173514) internal successors, (3488), 876 states have internal predecessors, (3488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:11,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 3488 transitions. [2021-06-05 22:29:11,789 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 3488 transitions. Word has length 26 [2021-06-05 22:29:11,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:11,789 INFO L482 AbstractCegarLoop]: Abstraction has 877 states and 3488 transitions. [2021-06-05 22:29:11,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:11,790 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 3488 transitions. [2021-06-05 22:29:11,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:29:11,791 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:11,791 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:11,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:11,992 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:11,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:11,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1537433360, now seen corresponding path program 6 times [2021-06-05 22:29:11,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:11,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116461466] [2021-06-05 22:29:11,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:11,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:12,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:12,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:12,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116461466] [2021-06-05 22:29:12,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116461466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:12,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151822753] [2021-06-05 22:29:12,059 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:12,093 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:29:12,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:12,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:29:12,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:12,154 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:12,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 22:29:12,155 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:29:12,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:12,168 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:12,168 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 22:29:12,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:12,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151822753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:12,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:12,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 22:29:12,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153156168] [2021-06-05 22:29:12,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:29:12,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:12,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:29:12,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:29:12,318 INFO L87 Difference]: Start difference. First operand 877 states and 3488 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:13,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:13,138 INFO L93 Difference]: Finished difference Result 1415 states and 5519 transitions. [2021-06-05 22:29:13,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:29:13,138 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:29:13,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:13,140 INFO L225 Difference]: With dead ends: 1415 [2021-06-05 22:29:13,141 INFO L226 Difference]: Without dead ends: 1332 [2021-06-05 22:29:13,141 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 569.3ms TimeCoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:29:13,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1332 states. [2021-06-05 22:29:13,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1332 to 868. [2021-06-05 22:29:13,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 3.980392156862745) internal successors, (3451), 867 states have internal predecessors, (3451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:13,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 3451 transitions. [2021-06-05 22:29:13,157 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 3451 transitions. Word has length 26 [2021-06-05 22:29:13,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:13,157 INFO L482 AbstractCegarLoop]: Abstraction has 868 states and 3451 transitions. [2021-06-05 22:29:13,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:13,157 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 3451 transitions. [2021-06-05 22:29:13,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:29:13,159 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:13,159 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:13,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-05 22:29:13,359 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:13,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:13,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1898034838, now seen corresponding path program 5 times [2021-06-05 22:29:13,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:13,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104815894] [2021-06-05 22:29:13,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:13,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:13,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:13,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:13,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104815894] [2021-06-05 22:29:13,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104815894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:13,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431387107] [2021-06-05 22:29:13,431 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:13,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:29:13,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:13,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:29:13,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:13,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:29:13,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:29:13,523 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:29:13,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:13,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:13,533 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 22:29:13,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:13,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431387107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:13,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:13,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:29:13,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953959726] [2021-06-05 22:29:13,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:29:13,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:13,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:29:13,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:29:13,599 INFO L87 Difference]: Start difference. First operand 868 states and 3451 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:13,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:13,803 INFO L93 Difference]: Finished difference Result 1197 states and 4721 transitions. [2021-06-05 22:29:13,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:29:13,804 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:29:13,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:13,806 INFO L225 Difference]: With dead ends: 1197 [2021-06-05 22:29:13,806 INFO L226 Difference]: Without dead ends: 1124 [2021-06-05 22:29:13,806 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 163.6ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:29:13,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1124 states. [2021-06-05 22:29:13,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1124 to 877. [2021-06-05 22:29:13,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 876 states have (on average 3.982876712328767) internal successors, (3489), 876 states have internal predecessors, (3489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:13,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 3489 transitions. [2021-06-05 22:29:13,822 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 3489 transitions. Word has length 26 [2021-06-05 22:29:13,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:13,822 INFO L482 AbstractCegarLoop]: Abstraction has 877 states and 3489 transitions. [2021-06-05 22:29:13,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:13,823 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 3489 transitions. [2021-06-05 22:29:13,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:29:13,824 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:13,825 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:14,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 22:29:14,040 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:14,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:14,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1725832690, now seen corresponding path program 6 times [2021-06-05 22:29:14,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:14,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494364973] [2021-06-05 22:29:14,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:14,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:14,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:14,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:14,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494364973] [2021-06-05 22:29:14,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494364973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:14,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211864290] [2021-06-05 22:29:14,117 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:14,160 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:29:14,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:14,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:29:14,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:14,242 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:14,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 22:29:14,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:29:14,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:14,252 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:14,252 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 22:29:14,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:14,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211864290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:14,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:14,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 22:29:14,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904767723] [2021-06-05 22:29:14,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:29:14,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:14,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:29:14,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:29:14,379 INFO L87 Difference]: Start difference. First operand 877 states and 3489 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:15,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:15,136 INFO L93 Difference]: Finished difference Result 1349 states and 5259 transitions. [2021-06-05 22:29:15,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:29:15,137 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:29:15,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:15,139 INFO L225 Difference]: With dead ends: 1349 [2021-06-05 22:29:15,139 INFO L226 Difference]: Without dead ends: 1274 [2021-06-05 22:29:15,139 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 579.0ms TimeCoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2021-06-05 22:29:15,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2021-06-05 22:29:15,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 868. [2021-06-05 22:29:15,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 3.980392156862745) internal successors, (3451), 867 states have internal predecessors, (3451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:15,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 3451 transitions. [2021-06-05 22:29:15,160 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 3451 transitions. Word has length 26 [2021-06-05 22:29:15,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:15,160 INFO L482 AbstractCegarLoop]: Abstraction has 868 states and 3451 transitions. [2021-06-05 22:29:15,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:15,160 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 3451 transitions. [2021-06-05 22:29:15,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:29:15,162 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:15,162 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:15,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 22:29:15,375 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:15,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:15,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1901898462, now seen corresponding path program 7 times [2021-06-05 22:29:15,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:15,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642743693] [2021-06-05 22:29:15,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:15,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:15,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:15,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:15,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642743693] [2021-06-05 22:29:15,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642743693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:15,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542631190] [2021-06-05 22:29:15,455 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:15,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:15,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:29:15,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:15,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:29:15,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 22:29:15,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:29:15,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:15,623 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:15,623 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-05 22:29:15,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:15,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542631190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:15,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:15,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 22:29:15,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719339199] [2021-06-05 22:29:15,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:29:15,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:15,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:29:15,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:29:15,658 INFO L87 Difference]: Start difference. First operand 868 states and 3451 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:15,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:15,942 INFO L93 Difference]: Finished difference Result 1481 states and 5795 transitions. [2021-06-05 22:29:15,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:29:15,942 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:29:15,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:15,945 INFO L225 Difference]: With dead ends: 1481 [2021-06-05 22:29:15,945 INFO L226 Difference]: Without dead ends: 1400 [2021-06-05 22:29:15,945 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 225.1ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:29:15,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2021-06-05 22:29:15,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 910. [2021-06-05 22:29:15,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 910 states, 909 states have (on average 3.957095709570957) internal successors, (3597), 909 states have internal predecessors, (3597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:15,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 3597 transitions. [2021-06-05 22:29:15,962 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 3597 transitions. Word has length 26 [2021-06-05 22:29:15,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:15,962 INFO L482 AbstractCegarLoop]: Abstraction has 910 states and 3597 transitions. [2021-06-05 22:29:15,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:15,962 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 3597 transitions. [2021-06-05 22:29:15,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:29:15,964 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:15,964 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:16,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:16,164 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:16,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:16,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1088329440, now seen corresponding path program 7 times [2021-06-05 22:29:16,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:16,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738529013] [2021-06-05 22:29:16,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:16,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:16,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:16,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:16,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738529013] [2021-06-05 22:29:16,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738529013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:16,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501606129] [2021-06-05 22:29:16,276 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:16,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:16,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:29:16,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:16,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:29:16,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 22:29:16,440 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:29:16,447 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:16,448 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:16,448 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-05 22:29:16,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:16,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501606129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:16,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:16,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 22:29:16,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137505943] [2021-06-05 22:29:16,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:29:16,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:16,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:29:16,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:29:16,487 INFO L87 Difference]: Start difference. First operand 910 states and 3597 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:16,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:16,849 INFO L93 Difference]: Finished difference Result 1431 states and 5615 transitions. [2021-06-05 22:29:16,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:29:16,849 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:29:16,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:16,851 INFO L225 Difference]: With dead ends: 1431 [2021-06-05 22:29:16,851 INFO L226 Difference]: Without dead ends: 1350 [2021-06-05 22:29:16,851 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 234.2ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:29:16,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2021-06-05 22:29:16,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 880. [2021-06-05 22:29:16,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 879 states have (on average 3.973833902161547) internal successors, (3493), 879 states have internal predecessors, (3493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:16,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 3493 transitions. [2021-06-05 22:29:16,864 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 3493 transitions. Word has length 26 [2021-06-05 22:29:16,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:16,864 INFO L482 AbstractCegarLoop]: Abstraction has 880 states and 3493 transitions. [2021-06-05 22:29:16,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:16,864 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 3493 transitions. [2021-06-05 22:29:16,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:29:16,866 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:16,866 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:17,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:17,066 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:17,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:17,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1950247962, now seen corresponding path program 8 times [2021-06-05 22:29:17,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:17,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117150724] [2021-06-05 22:29:17,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:17,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:17,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:17,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:17,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117150724] [2021-06-05 22:29:17,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117150724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:17,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374639368] [2021-06-05 22:29:17,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:17,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:29:17,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:17,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:29:17,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:17,312 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:17,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 22:29:17,313 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:29:17,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:17,325 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:17,325 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 22:29:17,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:17,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374639368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:17,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:17,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 22:29:17,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428861310] [2021-06-05 22:29:17,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:29:17,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:17,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:29:17,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:29:17,465 INFO L87 Difference]: Start difference. First operand 880 states and 3493 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:18,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:18,751 INFO L93 Difference]: Finished difference Result 2510 states and 9509 transitions. [2021-06-05 22:29:18,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 22:29:18,751 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:29:18,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:18,755 INFO L225 Difference]: With dead ends: 2510 [2021-06-05 22:29:18,755 INFO L226 Difference]: Without dead ends: 2237 [2021-06-05 22:29:18,755 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 1015.4ms TimeCoverageRelationStatistics Valid=363, Invalid=1529, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:29:18,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2237 states. [2021-06-05 22:29:18,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2237 to 886. [2021-06-05 22:29:18,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 3.977401129943503) internal successors, (3520), 885 states have internal predecessors, (3520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:18,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 3520 transitions. [2021-06-05 22:29:18,772 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 3520 transitions. Word has length 26 [2021-06-05 22:29:18,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:18,772 INFO L482 AbstractCegarLoop]: Abstraction has 886 states and 3520 transitions. [2021-06-05 22:29:18,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:18,772 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 3520 transitions. [2021-06-05 22:29:18,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:29:18,774 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:18,774 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:18,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:18,975 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:18,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:18,975 INFO L82 PathProgramCache]: Analyzing trace with hash -397476018, now seen corresponding path program 9 times [2021-06-05 22:29:18,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:18,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603347166] [2021-06-05 22:29:18,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:18,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:19,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:19,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:19,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603347166] [2021-06-05 22:29:19,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603347166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:19,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558180375] [2021-06-05 22:29:19,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:19,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:29:19,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:19,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:29:19,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:19,207 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:19,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 22:29:19,208 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:29:19,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:19,219 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:19,220 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 22:29:19,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:19,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558180375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:19,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:19,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 22:29:19,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854976765] [2021-06-05 22:29:19,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 22:29:19,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:19,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 22:29:19,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:29:19,350 INFO L87 Difference]: Start difference. First operand 886 states and 3520 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:20,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:20,686 INFO L93 Difference]: Finished difference Result 2599 states and 9825 transitions. [2021-06-05 22:29:20,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 22:29:20,686 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:29:20,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:20,690 INFO L225 Difference]: With dead ends: 2599 [2021-06-05 22:29:20,690 INFO L226 Difference]: Without dead ends: 2327 [2021-06-05 22:29:20,691 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 1022.9ms TimeCoverageRelationStatistics Valid=394, Invalid=1676, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 22:29:20,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2327 states. [2021-06-05 22:29:20,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2327 to 880. [2021-06-05 22:29:20,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 879 states have (on average 3.973833902161547) internal successors, (3493), 879 states have internal predecessors, (3493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:20,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 3493 transitions. [2021-06-05 22:29:20,707 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 3493 transitions. Word has length 26 [2021-06-05 22:29:20,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:20,708 INFO L482 AbstractCegarLoop]: Abstraction has 880 states and 3493 transitions. [2021-06-05 22:29:20,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:20,708 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 3493 transitions. [2021-06-05 22:29:20,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:29:20,709 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:20,709 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:20,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:20,910 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:20,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:20,910 INFO L82 PathProgramCache]: Analyzing trace with hash 178229480, now seen corresponding path program 8 times [2021-06-05 22:29:20,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:20,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283433940] [2021-06-05 22:29:20,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:20,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:20,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:20,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:20,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283433940] [2021-06-05 22:29:20,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283433940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:20,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194283634] [2021-06-05 22:29:20,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:21,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:29:21,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:21,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:29:21,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:21,111 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:21,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 22:29:21,112 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:29:21,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:21,122 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:21,122 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 22:29:21,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:21,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194283634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:21,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:21,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 22:29:21,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109957534] [2021-06-05 22:29:21,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:29:21,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:21,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:29:21,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:29:21,228 INFO L87 Difference]: Start difference. First operand 880 states and 3493 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:22,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:22,413 INFO L93 Difference]: Finished difference Result 1683 states and 6604 transitions. [2021-06-05 22:29:22,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:29:22,413 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:29:22,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:22,416 INFO L225 Difference]: With dead ends: 1683 [2021-06-05 22:29:22,416 INFO L226 Difference]: Without dead ends: 1610 [2021-06-05 22:29:22,416 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 824.1ms TimeCoverageRelationStatistics Valid=298, Invalid=1262, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:29:22,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1610 states. [2021-06-05 22:29:22,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1610 to 889. [2021-06-05 22:29:22,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 3.975225225225225) internal successors, (3530), 888 states have internal predecessors, (3530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:22,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 3530 transitions. [2021-06-05 22:29:22,430 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 3530 transitions. Word has length 26 [2021-06-05 22:29:22,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:22,430 INFO L482 AbstractCegarLoop]: Abstraction has 889 states and 3530 transitions. [2021-06-05 22:29:22,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:22,430 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 3530 transitions. [2021-06-05 22:29:22,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:29:22,431 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:22,431 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:22,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 22:29:22,632 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:22,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:22,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1217357596, now seen corresponding path program 9 times [2021-06-05 22:29:22,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:22,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686785677] [2021-06-05 22:29:22,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:22,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:22,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:22,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:22,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686785677] [2021-06-05 22:29:22,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686785677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:22,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86770541] [2021-06-05 22:29:22,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:22,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:29:22,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:22,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:29:22,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:22,830 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:22,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 22:29:22,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:29:22,860 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:22,861 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:22,861 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 22:29:22,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:22,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86770541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:22,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:22,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 22:29:22,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894534870] [2021-06-05 22:29:22,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:29:22,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:22,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:29:22,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:29:22,986 INFO L87 Difference]: Start difference. First operand 889 states and 3530 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:24,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:24,085 INFO L93 Difference]: Finished difference Result 1683 states and 6635 transitions. [2021-06-05 22:29:24,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:29:24,086 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:29:24,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:24,088 INFO L225 Difference]: With dead ends: 1683 [2021-06-05 22:29:24,088 INFO L226 Difference]: Without dead ends: 1600 [2021-06-05 22:29:24,089 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 799.3ms TimeCoverageRelationStatistics Valid=314, Invalid=1326, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:29:24,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1600 states. [2021-06-05 22:29:24,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1600 to 871. [2021-06-05 22:29:24,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 3.9770114942528734) internal successors, (3460), 870 states have internal predecessors, (3460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:24,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 3460 transitions. [2021-06-05 22:29:24,102 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 3460 transitions. Word has length 26 [2021-06-05 22:29:24,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:24,102 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 3460 transitions. [2021-06-05 22:29:24,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:24,102 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 3460 transitions. [2021-06-05 22:29:24,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:29:24,104 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:24,104 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:24,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 22:29:24,304 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:24,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:24,305 INFO L82 PathProgramCache]: Analyzing trace with hash 2024916790, now seen corresponding path program 10 times [2021-06-05 22:29:24,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:24,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684153582] [2021-06-05 22:29:24,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:24,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:24,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:24,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:24,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684153582] [2021-06-05 22:29:24,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684153582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:24,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703173121] [2021-06-05 22:29:24,391 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:24,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:29:24,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:24,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:29:24,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:24,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:29:24,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 22:29:24,573 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:29:24,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:24,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:24,580 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-05 22:29:24,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:24,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703173121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:24,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:24,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 22:29:24,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714935354] [2021-06-05 22:29:24,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:29:24,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:24,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:29:24,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:29:24,615 INFO L87 Difference]: Start difference. First operand 871 states and 3460 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:25,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:25,086 INFO L93 Difference]: Finished difference Result 2026 states and 7973 transitions. [2021-06-05 22:29:25,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:29:25,087 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:29:25,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:25,090 INFO L225 Difference]: With dead ends: 2026 [2021-06-05 22:29:25,090 INFO L226 Difference]: Without dead ends: 1945 [2021-06-05 22:29:25,090 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 250.1ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:29:25,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1945 states. [2021-06-05 22:29:25,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1945 to 911. [2021-06-05 22:29:25,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 910 states have (on average 3.9472527472527474) internal successors, (3592), 910 states have internal predecessors, (3592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:25,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 3592 transitions. [2021-06-05 22:29:25,105 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 3592 transitions. Word has length 26 [2021-06-05 22:29:25,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:25,105 INFO L482 AbstractCegarLoop]: Abstraction has 911 states and 3592 transitions. [2021-06-05 22:29:25,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:25,106 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 3592 transitions. [2021-06-05 22:29:25,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:29:25,107 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:25,107 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:25,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:25,308 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:25,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:25,308 INFO L82 PathProgramCache]: Analyzing trace with hash -965311112, now seen corresponding path program 10 times [2021-06-05 22:29:25,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:25,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791153920] [2021-06-05 22:29:25,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:25,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:25,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:25,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:25,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791153920] [2021-06-05 22:29:25,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791153920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:25,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633387453] [2021-06-05 22:29:25,404 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:25,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:29:25,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:25,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:29:25,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:25,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:29:25,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 22:29:25,568 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:29:25,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:25,574 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:25,574 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-05 22:29:25,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:25,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633387453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:25,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:25,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 22:29:25,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325627026] [2021-06-05 22:29:25,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:29:25,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:25,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:29:25,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:29:25,608 INFO L87 Difference]: Start difference. First operand 911 states and 3592 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:26,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:26,019 INFO L93 Difference]: Finished difference Result 1975 states and 7789 transitions. [2021-06-05 22:29:26,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:29:26,019 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:29:26,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:26,022 INFO L225 Difference]: With dead ends: 1975 [2021-06-05 22:29:26,023 INFO L226 Difference]: Without dead ends: 1894 [2021-06-05 22:29:26,023 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 229.3ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:29:26,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1894 states. [2021-06-05 22:29:26,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1894 to 881. [2021-06-05 22:29:26,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 881 states, 880 states have (on average 3.963636363636364) internal successors, (3488), 880 states have internal predecessors, (3488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:26,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 3488 transitions. [2021-06-05 22:29:26,039 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 3488 transitions. Word has length 26 [2021-06-05 22:29:26,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:26,039 INFO L482 AbstractCegarLoop]: Abstraction has 881 states and 3488 transitions. [2021-06-05 22:29:26,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:26,039 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 3488 transitions. [2021-06-05 22:29:26,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:29:26,041 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:26,041 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:26,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:26,241 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:26,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:26,242 INFO L82 PathProgramCache]: Analyzing trace with hash -406560492, now seen corresponding path program 7 times [2021-06-05 22:29:26,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:26,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96441588] [2021-06-05 22:29:26,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:26,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:26,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:26,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:26,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96441588] [2021-06-05 22:29:26,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96441588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:26,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188843560] [2021-06-05 22:29:26,308 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:26,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:26,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:29:26,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:26,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:29:26,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:29:26,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:29:26,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:26,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:26,440 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 22:29:26,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:26,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188843560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:26,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:26,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:29:26,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094854340] [2021-06-05 22:29:26,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:29:26,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:26,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:29:26,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:29:26,496 INFO L87 Difference]: Start difference. First operand 881 states and 3488 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:26,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:26,928 INFO L93 Difference]: Finished difference Result 1399 states and 5520 transitions. [2021-06-05 22:29:26,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:29:26,929 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:29:26,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:26,932 INFO L225 Difference]: With dead ends: 1399 [2021-06-05 22:29:26,932 INFO L226 Difference]: Without dead ends: 1317 [2021-06-05 22:29:26,933 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 244.6ms TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:29:26,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1317 states. [2021-06-05 22:29:26,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1317 to 902. [2021-06-05 22:29:26,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 3.9633740288568258) internal successors, (3571), 901 states have internal predecessors, (3571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:26,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 3571 transitions. [2021-06-05 22:29:26,951 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 3571 transitions. Word has length 26 [2021-06-05 22:29:26,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:26,951 INFO L482 AbstractCegarLoop]: Abstraction has 902 states and 3571 transitions. [2021-06-05 22:29:26,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:26,951 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 3571 transitions. [2021-06-05 22:29:26,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:29:26,955 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:26,955 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:27,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:27,177 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:27,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:27,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1126993960, now seen corresponding path program 8 times [2021-06-05 22:29:27,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:27,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564451830] [2021-06-05 22:29:27,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:27,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:27,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:27,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:27,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564451830] [2021-06-05 22:29:27,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564451830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:27,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210813311] [2021-06-05 22:29:27,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:27,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:29:27,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:27,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:29:27,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:27,387 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:27,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 22:29:27,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:29:27,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:27,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:27,406 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:38 [2021-06-05 22:29:27,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:27,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210813311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:27,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:27,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 22:29:27,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418864554] [2021-06-05 22:29:27,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:29:27,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:27,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:29:27,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:29:27,537 INFO L87 Difference]: Start difference. First operand 902 states and 3571 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:28,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:28,260 INFO L93 Difference]: Finished difference Result 1442 states and 5673 transitions. [2021-06-05 22:29:28,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:29:28,261 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:29:28,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:28,263 INFO L225 Difference]: With dead ends: 1442 [2021-06-05 22:29:28,263 INFO L226 Difference]: Without dead ends: 1369 [2021-06-05 22:29:28,263 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 566.4ms TimeCoverageRelationStatistics Valid=160, Invalid=596, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:29:28,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2021-06-05 22:29:28,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 893. [2021-06-05 22:29:28,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 3.9618834080717487) internal successors, (3534), 892 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:28,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 3534 transitions. [2021-06-05 22:29:28,280 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 3534 transitions. Word has length 26 [2021-06-05 22:29:28,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:28,280 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 3534 transitions. [2021-06-05 22:29:28,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:28,280 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 3534 transitions. [2021-06-05 22:29:28,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:29:28,282 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:28,282 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:28,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-06-05 22:29:28,497 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:28,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:28,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1969868314, now seen corresponding path program 9 times [2021-06-05 22:29:28,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:28,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189036808] [2021-06-05 22:29:28,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:28,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:28,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:28,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:28,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189036808] [2021-06-05 22:29:28,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189036808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:28,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108161822] [2021-06-05 22:29:28,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:28,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:29:28,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:28,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:29:28,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:28,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:29:28,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 22:29:28,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:29:28,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:28,743 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:28,743 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-05 22:29:28,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:28,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108161822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:28,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:28,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 22:29:28,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325878762] [2021-06-05 22:29:28,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:29:28,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:28,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:29:28,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:29:28,783 INFO L87 Difference]: Start difference. First operand 893 states and 3534 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:29,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:29,202 INFO L93 Difference]: Finished difference Result 1409 states and 5525 transitions. [2021-06-05 22:29:29,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:29:29,202 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:29:29,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:29,205 INFO L225 Difference]: With dead ends: 1409 [2021-06-05 22:29:29,205 INFO L226 Difference]: Without dead ends: 1338 [2021-06-05 22:29:29,205 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 237.2ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:29:29,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1338 states. [2021-06-05 22:29:29,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1338 to 917. [2021-06-05 22:29:29,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 916 states have (on average 3.947598253275109) internal successors, (3616), 916 states have internal predecessors, (3616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:29,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 3616 transitions. [2021-06-05 22:29:29,220 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 3616 transitions. Word has length 26 [2021-06-05 22:29:29,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:29,220 INFO L482 AbstractCegarLoop]: Abstraction has 917 states and 3616 transitions. [2021-06-05 22:29:29,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:29,220 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 3616 transitions. [2021-06-05 22:29:29,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:29:29,222 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:29,222 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:29,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-05 22:29:29,424 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:29,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:29,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1020359588, now seen corresponding path program 7 times [2021-06-05 22:29:29,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:29,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574195486] [2021-06-05 22:29:29,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:29,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:29,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:29,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:29,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574195486] [2021-06-05 22:29:29,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574195486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:29,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066915198] [2021-06-05 22:29:29,501 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:29,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:29,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:29:29,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:29,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:29:29,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 22:29:29,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:29:29,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:29,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:29,676 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-05 22:29:29,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:29,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066915198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:29,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:29,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 22:29:29,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932781326] [2021-06-05 22:29:29,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:29:29,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:29,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:29:29,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:29:29,717 INFO L87 Difference]: Start difference. First operand 917 states and 3616 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:30,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:30,103 INFO L93 Difference]: Finished difference Result 1368 states and 5378 transitions. [2021-06-05 22:29:30,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:29:30,104 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:29:30,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:30,106 INFO L225 Difference]: With dead ends: 1368 [2021-06-05 22:29:30,106 INFO L226 Difference]: Without dead ends: 1297 [2021-06-05 22:29:30,106 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 232.6ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:29:30,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1297 states. [2021-06-05 22:29:30,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1297 to 893. [2021-06-05 22:29:30,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 3.9618834080717487) internal successors, (3534), 892 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:30,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 3534 transitions. [2021-06-05 22:29:30,118 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 3534 transitions. Word has length 26 [2021-06-05 22:29:30,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:30,118 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 3534 transitions. [2021-06-05 22:29:30,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:30,119 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 3534 transitions. [2021-06-05 22:29:30,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:29:30,120 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:30,120 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:30,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 22:29:30,320 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:30,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:30,321 INFO L82 PathProgramCache]: Analyzing trace with hash -203283562, now seen corresponding path program 8 times [2021-06-05 22:29:30,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:30,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159650268] [2021-06-05 22:29:30,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:30,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:30,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:30,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:30,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159650268] [2021-06-05 22:29:30,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159650268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:30,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754997080] [2021-06-05 22:29:30,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:30,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:29:30,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:30,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:29:30,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:30,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:29:30,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:29:30,512 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:29:30,518 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:30,519 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:30,519 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 22:29:30,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:30,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754997080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:30,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:30,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:29:30,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034561060] [2021-06-05 22:29:30,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:29:30,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:30,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:29:30,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:29:30,566 INFO L87 Difference]: Start difference. First operand 893 states and 3534 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:30,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:30,892 INFO L93 Difference]: Finished difference Result 1337 states and 5270 transitions. [2021-06-05 22:29:30,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:29:30,893 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:29:30,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:30,895 INFO L225 Difference]: With dead ends: 1337 [2021-06-05 22:29:30,895 INFO L226 Difference]: Without dead ends: 1264 [2021-06-05 22:29:30,895 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 201.3ms TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:29:30,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2021-06-05 22:29:30,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 902. [2021-06-05 22:29:30,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 3.9644839067702553) internal successors, (3572), 901 states have internal predecessors, (3572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:30,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 3572 transitions. [2021-06-05 22:29:30,908 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 3572 transitions. Word has length 26 [2021-06-05 22:29:30,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:30,908 INFO L482 AbstractCegarLoop]: Abstraction has 902 states and 3572 transitions. [2021-06-05 22:29:30,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:30,908 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 3572 transitions. [2021-06-05 22:29:30,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:29:30,910 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:30,910 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:31,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:31,112 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:31,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:31,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1606870386, now seen corresponding path program 9 times [2021-06-05 22:29:31,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:31,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297065074] [2021-06-05 22:29:31,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:31,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:31,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:31,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:31,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297065074] [2021-06-05 22:29:31,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297065074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:31,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39892626] [2021-06-05 22:29:31,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:31,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:29:31,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:31,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:29:31,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:31,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:29:31,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:29:31,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:29:31,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:31,320 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:31,320 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 22:29:31,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:31,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39892626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:31,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:31,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:29:31,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154127274] [2021-06-05 22:29:31,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:29:31,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:31,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:29:31,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:29:31,374 INFO L87 Difference]: Start difference. First operand 902 states and 3572 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:31,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:31,753 INFO L93 Difference]: Finished difference Result 1333 states and 5253 transitions. [2021-06-05 22:29:31,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:29:31,754 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:29:31,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:31,756 INFO L225 Difference]: With dead ends: 1333 [2021-06-05 22:29:31,757 INFO L226 Difference]: Without dead ends: 1258 [2021-06-05 22:29:31,757 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 214.6ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:29:31,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2021-06-05 22:29:31,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 884. [2021-06-05 22:29:31,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.9614949037372593) internal successors, (3498), 883 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:31,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 3498 transitions. [2021-06-05 22:29:31,776 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 3498 transitions. Word has length 26 [2021-06-05 22:29:31,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:31,776 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 3498 transitions. [2021-06-05 22:29:31,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:31,776 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 3498 transitions. [2021-06-05 22:29:31,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:29:31,778 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:31,778 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:31,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:31,989 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:31,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:31,989 INFO L82 PathProgramCache]: Analyzing trace with hash -131055850, now seen corresponding path program 10 times [2021-06-05 22:29:31,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:31,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161121735] [2021-06-05 22:29:31,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:31,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:32,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:32,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:32,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161121735] [2021-06-05 22:29:32,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161121735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:32,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103329370] [2021-06-05 22:29:32,061 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:32,124 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:29:32,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:32,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:29:32,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:32,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:29:32,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 22:29:32,231 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:29:32,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:32,238 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:32,238 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-05 22:29:32,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:32,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103329370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:32,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:32,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 22:29:32,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088374466] [2021-06-05 22:29:32,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:29:32,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:32,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:29:32,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:29:32,277 INFO L87 Difference]: Start difference. First operand 884 states and 3498 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:32,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:32,704 INFO L93 Difference]: Finished difference Result 1770 states and 6860 transitions. [2021-06-05 22:29:32,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:29:32,704 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:29:32,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:32,707 INFO L225 Difference]: With dead ends: 1770 [2021-06-05 22:29:32,707 INFO L226 Difference]: Without dead ends: 1699 [2021-06-05 22:29:32,707 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 220.7ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:29:32,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1699 states. [2021-06-05 22:29:32,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1699 to 916. [2021-06-05 22:29:32,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 915 states have (on average 3.9366120218579237) internal successors, (3602), 915 states have internal predecessors, (3602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:32,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 3602 transitions. [2021-06-05 22:29:32,725 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 3602 transitions. Word has length 26 [2021-06-05 22:29:32,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:32,725 INFO L482 AbstractCegarLoop]: Abstraction has 916 states and 3602 transitions. [2021-06-05 22:29:32,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:32,725 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 3602 transitions. [2021-06-05 22:29:32,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:29:32,727 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:32,727 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:32,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:32,927 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:32,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:32,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1173683544, now seen corresponding path program 10 times [2021-06-05 22:29:32,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:32,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628222857] [2021-06-05 22:29:32,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:32,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:32,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:32,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:32,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628222857] [2021-06-05 22:29:32,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628222857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:32,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94328807] [2021-06-05 22:29:32,992 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:33,026 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:29:33,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:33,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:29:33,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:33,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:29:33,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 22:29:33,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:29:33,152 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:33,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:33,153 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-05 22:29:33,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:33,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94328807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:33,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:33,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 22:29:33,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502850358] [2021-06-05 22:29:33,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:29:33,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:33,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:29:33,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:29:33,185 INFO L87 Difference]: Start difference. First operand 916 states and 3602 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:33,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:33,608 INFO L93 Difference]: Finished difference Result 1728 states and 6709 transitions. [2021-06-05 22:29:33,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:29:33,608 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:29:33,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:33,611 INFO L225 Difference]: With dead ends: 1728 [2021-06-05 22:29:33,611 INFO L226 Difference]: Without dead ends: 1657 [2021-06-05 22:29:33,611 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 204.9ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:29:33,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1657 states. [2021-06-05 22:29:33,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1657 to 884. [2021-06-05 22:29:33,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.9614949037372593) internal successors, (3498), 883 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:33,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 3498 transitions. [2021-06-05 22:29:33,624 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 3498 transitions. Word has length 26 [2021-06-05 22:29:33,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:33,624 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 3498 transitions. [2021-06-05 22:29:33,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:33,624 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 3498 transitions. [2021-06-05 22:29:33,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:29:33,633 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:33,633 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:33,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:33,834 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:33,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:33,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1946545164, now seen corresponding path program 11 times [2021-06-05 22:29:33,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:33,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177046315] [2021-06-05 22:29:33,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:33,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:33,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:33,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:33,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177046315] [2021-06-05 22:29:33,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177046315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:33,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313151887] [2021-06-05 22:29:33,913 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:33,962 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:29:33,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:33,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:29:33,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:34,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:29:34,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:29:34,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:29:34,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:34,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:34,054 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-06-05 22:29:34,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:34,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313151887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:34,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:34,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 22:29:34,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682617140] [2021-06-05 22:29:34,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:29:34,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:34,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:29:34,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:29:34,092 INFO L87 Difference]: Start difference. First operand 884 states and 3498 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:34,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:34,324 INFO L93 Difference]: Finished difference Result 1395 states and 5445 transitions. [2021-06-05 22:29:34,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:29:34,324 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:29:34,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:34,327 INFO L225 Difference]: With dead ends: 1395 [2021-06-05 22:29:34,327 INFO L226 Difference]: Without dead ends: 1314 [2021-06-05 22:29:34,327 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 188.5ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:29:34,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1314 states. [2021-06-05 22:29:34,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1314 to 923. [2021-06-05 22:29:34,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 922 states have (on average 3.9425162689804774) internal successors, (3635), 922 states have internal predecessors, (3635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:34,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 3635 transitions. [2021-06-05 22:29:34,346 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 3635 transitions. Word has length 26 [2021-06-05 22:29:34,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:34,347 INFO L482 AbstractCegarLoop]: Abstraction has 923 states and 3635 transitions. [2021-06-05 22:29:34,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:34,347 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 3635 transitions. [2021-06-05 22:29:34,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:29:34,348 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:34,348 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:34,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-06-05 22:29:34,565 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:34,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:34,565 INFO L82 PathProgramCache]: Analyzing trace with hash -641805770, now seen corresponding path program 11 times [2021-06-05 22:29:34,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:34,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586284470] [2021-06-05 22:29:34,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:34,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:34,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:34,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:34,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586284470] [2021-06-05 22:29:34,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586284470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:34,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249582300] [2021-06-05 22:29:34,665 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:34,698 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:29:34,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:34,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:29:34,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:34,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:29:34,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:29:34,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:29:34,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:34,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:34,787 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-06-05 22:29:34,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:34,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249582300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:34,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:34,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 22:29:34,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280682262] [2021-06-05 22:29:34,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:29:34,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:34,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:29:34,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:29:34,832 INFO L87 Difference]: Start difference. First operand 923 states and 3635 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:35,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:35,076 INFO L93 Difference]: Finished difference Result 1351 states and 5290 transitions. [2021-06-05 22:29:35,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:29:35,076 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:29:35,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:35,078 INFO L225 Difference]: With dead ends: 1351 [2021-06-05 22:29:35,078 INFO L226 Difference]: Without dead ends: 1270 [2021-06-05 22:29:35,078 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 208.6ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:29:35,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1270 states. [2021-06-05 22:29:35,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1270 to 893. [2021-06-05 22:29:35,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 3.958520179372197) internal successors, (3531), 892 states have internal predecessors, (3531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:35,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 3531 transitions. [2021-06-05 22:29:35,090 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 3531 transitions. Word has length 26 [2021-06-05 22:29:35,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:35,091 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 3531 transitions. [2021-06-05 22:29:35,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:35,091 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 3531 transitions. [2021-06-05 22:29:35,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:29:35,092 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:35,092 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:35,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:35,293 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:35,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:35,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1503724292, now seen corresponding path program 12 times [2021-06-05 22:29:35,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:35,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805394281] [2021-06-05 22:29:35,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:35,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:35,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:29:35,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:35,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805394281] [2021-06-05 22:29:35,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805394281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:35,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994195611] [2021-06-05 22:29:35,379 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:35,414 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:29:35,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:35,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:29:35,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:35,477 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:35,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 22:29:35,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:29:35,487 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:35,488 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:35,488 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 22:29:35,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:35,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994195611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:35,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:35,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 22:29:35,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515698464] [2021-06-05 22:29:35,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:29:35,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:35,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:29:35,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:29:35,644 INFO L87 Difference]: Start difference. First operand 893 states and 3531 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:36,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:36,430 INFO L93 Difference]: Finished difference Result 2174 states and 8231 transitions. [2021-06-05 22:29:36,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:29:36,430 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:29:36,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:36,434 INFO L225 Difference]: With dead ends: 2174 [2021-06-05 22:29:36,434 INFO L226 Difference]: Without dead ends: 1901 [2021-06-05 22:29:36,434 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 615.4ms TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:29:36,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1901 states. [2021-06-05 22:29:36,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1901 to 899. [2021-06-05 22:29:36,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 3.9621380846325165) internal successors, (3558), 898 states have internal predecessors, (3558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:36,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 3558 transitions. [2021-06-05 22:29:36,449 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 3558 transitions. Word has length 26 [2021-06-05 22:29:36,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:36,449 INFO L482 AbstractCegarLoop]: Abstraction has 899 states and 3558 transitions. [2021-06-05 22:29:36,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:36,449 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 3558 transitions. [2021-06-05 22:29:36,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:29:36,451 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:36,451 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:36,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-06-05 22:29:36,651 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:36,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:36,651 INFO L82 PathProgramCache]: Analyzing trace with hash 49047652, now seen corresponding path program 13 times [2021-06-05 22:29:36,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:36,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361858945] [2021-06-05 22:29:36,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:36,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:36,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:29:36,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:36,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361858945] [2021-06-05 22:29:36,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361858945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:36,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440859023] [2021-06-05 22:29:36,744 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:36,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:36,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:29:36,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:36,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:29:36,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:29:36,831 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:29:36,837 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:36,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:36,838 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 22:29:36,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:36,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440859023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:36,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:36,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:29:36,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867758121] [2021-06-05 22:29:36,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:29:36,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:36,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:29:36,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:29:36,887 INFO L87 Difference]: Start difference. First operand 899 states and 3558 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:37,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:37,156 INFO L93 Difference]: Finished difference Result 1423 states and 5561 transitions. [2021-06-05 22:29:37,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:29:37,156 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:29:37,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:37,158 INFO L225 Difference]: With dead ends: 1423 [2021-06-05 22:29:37,158 INFO L226 Difference]: Without dead ends: 1333 [2021-06-05 22:29:37,159 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 200.7ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:29:37,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1333 states. [2021-06-05 22:29:37,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1333 to 899. [2021-06-05 22:29:37,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 3.961024498886414) internal successors, (3557), 898 states have internal predecessors, (3557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:37,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 3557 transitions. [2021-06-05 22:29:37,181 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 3557 transitions. Word has length 26 [2021-06-05 22:29:37,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:37,181 INFO L482 AbstractCegarLoop]: Abstraction has 899 states and 3557 transitions. [2021-06-05 22:29:37,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:37,181 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 3557 transitions. [2021-06-05 22:29:37,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:29:37,182 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:37,182 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:37,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:37,383 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:37,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:37,383 INFO L82 PathProgramCache]: Analyzing trace with hash 624753150, now seen corresponding path program 12 times [2021-06-05 22:29:37,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:37,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717092080] [2021-06-05 22:29:37,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:37,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:37,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:37,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:37,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717092080] [2021-06-05 22:29:37,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717092080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:37,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133005746] [2021-06-05 22:29:37,464 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:37,500 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:29:37,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:37,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:29:37,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:37,556 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:37,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 22:29:37,557 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:29:37,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:37,567 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:37,567 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 22:29:37,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:37,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133005746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:37,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:37,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 22:29:37,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833257896] [2021-06-05 22:29:37,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:29:37,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:37,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:29:37,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:29:37,701 INFO L87 Difference]: Start difference. First operand 899 states and 3557 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:39,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:39,886 INFO L93 Difference]: Finished difference Result 2044 states and 7778 transitions. [2021-06-05 22:29:39,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 22:29:39,886 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:29:39,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:39,890 INFO L225 Difference]: With dead ends: 2044 [2021-06-05 22:29:39,890 INFO L226 Difference]: Without dead ends: 1885 [2021-06-05 22:29:39,890 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 1612.7ms TimeCoverageRelationStatistics Valid=641, Invalid=2551, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 22:29:39,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1885 states. [2021-06-05 22:29:39,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1885 to 928. [2021-06-05 22:29:39,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 927 states have (on average 3.9525350593311757) internal successors, (3664), 927 states have internal predecessors, (3664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:39,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 3664 transitions. [2021-06-05 22:29:39,912 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 3664 transitions. Word has length 26 [2021-06-05 22:29:39,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:39,912 INFO L482 AbstractCegarLoop]: Abstraction has 928 states and 3664 transitions. [2021-06-05 22:29:39,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:39,912 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 3664 transitions. [2021-06-05 22:29:39,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:29:39,914 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:39,914 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:40,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-05 22:29:40,129 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:40,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:40,129 INFO L82 PathProgramCache]: Analyzing trace with hash -770833926, now seen corresponding path program 13 times [2021-06-05 22:29:40,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:40,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883115907] [2021-06-05 22:29:40,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:40,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:40,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:40,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:40,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883115907] [2021-06-05 22:29:40,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883115907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:40,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021222753] [2021-06-05 22:29:40,270 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:40,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:40,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:29:40,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:40,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:29:40,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:29:40,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:29:40,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:40,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:40,414 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 22:29:40,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:40,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021222753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:40,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:40,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:29:40,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878251945] [2021-06-05 22:29:40,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:29:40,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:40,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:29:40,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:29:40,462 INFO L87 Difference]: Start difference. First operand 928 states and 3664 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:40,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:40,671 INFO L93 Difference]: Finished difference Result 1337 states and 5240 transitions. [2021-06-05 22:29:40,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:29:40,671 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:29:40,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:40,673 INFO L225 Difference]: With dead ends: 1337 [2021-06-05 22:29:40,673 INFO L226 Difference]: Without dead ends: 1254 [2021-06-05 22:29:40,673 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 202.7ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:29:40,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1254 states. [2021-06-05 22:29:40,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1254 to 922. [2021-06-05 22:29:40,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 3.958740499457112) internal successors, (3646), 921 states have internal predecessors, (3646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:40,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 3646 transitions. [2021-06-05 22:29:40,692 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 3646 transitions. Word has length 26 [2021-06-05 22:29:40,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:40,693 INFO L482 AbstractCegarLoop]: Abstraction has 922 states and 3646 transitions. [2021-06-05 22:29:40,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:40,693 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 3646 transitions. [2021-06-05 22:29:40,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:29:40,694 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:40,694 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:40,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:40,895 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:40,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:40,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1137009814, now seen corresponding path program 11 times [2021-06-05 22:29:40,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:40,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010131776] [2021-06-05 22:29:40,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:40,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:40,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:40,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:40,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010131776] [2021-06-05 22:29:40,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010131776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:40,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278846183] [2021-06-05 22:29:40,964 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:41,002 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:29:41,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:41,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:29:41,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:41,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:29:41,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:29:41,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:29:41,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:41,064 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:41,064 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 22:29:41,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:41,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278846183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:41,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:41,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:29:41,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841011521] [2021-06-05 22:29:41,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:29:41,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:41,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:29:41,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:29:41,111 INFO L87 Difference]: Start difference. First operand 922 states and 3646 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:41,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:41,385 INFO L93 Difference]: Finished difference Result 1346 states and 5288 transitions. [2021-06-05 22:29:41,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:29:41,386 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:29:41,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:41,388 INFO L225 Difference]: With dead ends: 1346 [2021-06-05 22:29:41,388 INFO L226 Difference]: Without dead ends: 1264 [2021-06-05 22:29:41,388 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 163.9ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:29:41,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2021-06-05 22:29:41,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 940. [2021-06-05 22:29:41,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 939 states have (on average 3.9605963791267307) internal successors, (3719), 939 states have internal predecessors, (3719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:41,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 3719 transitions. [2021-06-05 22:29:41,401 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 3719 transitions. Word has length 26 [2021-06-05 22:29:41,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:41,401 INFO L482 AbstractCegarLoop]: Abstraction has 940 states and 3719 transitions. [2021-06-05 22:29:41,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:41,401 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 3719 transitions. [2021-06-05 22:29:41,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:29:41,402 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:41,402 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:41,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:41,603 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:41,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:41,603 INFO L82 PathProgramCache]: Analyzing trace with hash 416576346, now seen corresponding path program 12 times [2021-06-05 22:29:41,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:41,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126150493] [2021-06-05 22:29:41,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:41,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:41,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:41,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:41,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126150493] [2021-06-05 22:29:41,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126150493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:41,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124949568] [2021-06-05 22:29:41,668 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:41,709 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:29:41,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:41,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:29:41,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:41,769 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:41,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 22:29:41,770 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:29:41,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:41,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:41,778 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:21 [2021-06-05 22:29:41,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:41,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124949568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:41,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:41,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 22:29:41,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571829264] [2021-06-05 22:29:41,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:29:41,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:41,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:29:41,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:29:41,883 INFO L87 Difference]: Start difference. First operand 940 states and 3719 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:42,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:42,399 INFO L93 Difference]: Finished difference Result 1447 states and 5652 transitions. [2021-06-05 22:29:42,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:29:42,399 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:29:42,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:42,402 INFO L225 Difference]: With dead ends: 1447 [2021-06-05 22:29:42,402 INFO L226 Difference]: Without dead ends: 1374 [2021-06-05 22:29:42,402 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 355.4ms TimeCoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:29:42,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1374 states. [2021-06-05 22:29:42,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1374 to 931. [2021-06-05 22:29:42,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.9591397849462364) internal successors, (3682), 930 states have internal predecessors, (3682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:42,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3682 transitions. [2021-06-05 22:29:42,418 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3682 transitions. Word has length 26 [2021-06-05 22:29:42,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:42,418 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 3682 transitions. [2021-06-05 22:29:42,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:42,418 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3682 transitions. [2021-06-05 22:29:42,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:29:42,420 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:42,420 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:42,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-06-05 22:29:42,621 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:42,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:42,621 INFO L82 PathProgramCache]: Analyzing trace with hash -781528676, now seen corresponding path program 13 times [2021-06-05 22:29:42,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:42,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437384919] [2021-06-05 22:29:42,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:42,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:42,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:42,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:42,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437384919] [2021-06-05 22:29:42,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437384919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:42,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675191613] [2021-06-05 22:29:42,696 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:42,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:42,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:29:42,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:42,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:29:42,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:29:42,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:29:42,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:42,805 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:42,805 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-06-05 22:29:42,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:42,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675191613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:42,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:42,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 22:29:42,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457450787] [2021-06-05 22:29:42,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:29:42,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:42,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:29:42,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:29:42,850 INFO L87 Difference]: Start difference. First operand 931 states and 3682 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:43,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:43,081 INFO L93 Difference]: Finished difference Result 1363 states and 5323 transitions. [2021-06-05 22:29:43,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:29:43,082 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:29:43,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:43,084 INFO L225 Difference]: With dead ends: 1363 [2021-06-05 22:29:43,084 INFO L226 Difference]: Without dead ends: 1292 [2021-06-05 22:29:43,084 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 178.7ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:29:43,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1292 states. [2021-06-05 22:29:43,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1292 to 955. [2021-06-05 22:29:43,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 954 states have (on average 3.9454926624737947) internal successors, (3764), 954 states have internal predecessors, (3764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:43,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 3764 transitions. [2021-06-05 22:29:43,096 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 3764 transitions. Word has length 26 [2021-06-05 22:29:43,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:43,097 INFO L482 AbstractCegarLoop]: Abstraction has 955 states and 3764 transitions. [2021-06-05 22:29:43,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:43,097 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 3764 transitions. [2021-06-05 22:29:43,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:29:43,098 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:43,098 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:43,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:43,299 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:43,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:43,299 INFO L82 PathProgramCache]: Analyzing trace with hash 523210718, now seen corresponding path program 11 times [2021-06-05 22:29:43,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:43,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365189912] [2021-06-05 22:29:43,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:43,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:43,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:43,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:43,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365189912] [2021-06-05 22:29:43,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365189912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:43,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984282668] [2021-06-05 22:29:43,373 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:43,497 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:29:43,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:43,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:29:43,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:43,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:29:43,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:29:43,608 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:29:43,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:43,616 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:43,616 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-06-05 22:29:43,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:43,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984282668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:43,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:43,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 22:29:43,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142488193] [2021-06-05 22:29:43,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:29:43,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:43,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:29:43,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:29:43,658 INFO L87 Difference]: Start difference. First operand 955 states and 3764 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:43,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:43,911 INFO L93 Difference]: Finished difference Result 1327 states and 5197 transitions. [2021-06-05 22:29:43,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:29:43,912 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:29:43,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:43,914 INFO L225 Difference]: With dead ends: 1327 [2021-06-05 22:29:43,914 INFO L226 Difference]: Without dead ends: 1256 [2021-06-05 22:29:43,914 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 177.9ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:29:43,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2021-06-05 22:29:43,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 931. [2021-06-05 22:29:43,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.9591397849462364) internal successors, (3682), 930 states have internal predecessors, (3682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:43,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3682 transitions. [2021-06-05 22:29:43,933 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3682 transitions. Word has length 26 [2021-06-05 22:29:43,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:43,933 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 3682 transitions. [2021-06-05 22:29:43,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:43,933 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3682 transitions. [2021-06-05 22:29:43,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:29:43,935 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:43,935 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:44,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-06-05 22:29:44,159 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:44,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:44,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1340286744, now seen corresponding path program 12 times [2021-06-05 22:29:44,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:44,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147270035] [2021-06-05 22:29:44,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:44,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:44,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:44,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:44,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147270035] [2021-06-05 22:29:44,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147270035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:44,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325105834] [2021-06-05 22:29:44,240 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:44,275 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:29:44,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:44,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:29:44,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:44,332 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:44,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 22:29:44,333 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:29:44,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:44,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:44,349 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:38 [2021-06-05 22:29:44,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:44,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325105834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:44,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:44,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 22:29:44,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650691433] [2021-06-05 22:29:44,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:29:44,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:44,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:29:44,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:29:44,459 INFO L87 Difference]: Start difference. First operand 931 states and 3682 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:45,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:45,139 INFO L93 Difference]: Finished difference Result 1347 states and 5273 transitions. [2021-06-05 22:29:45,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:29:45,139 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:29:45,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:45,141 INFO L225 Difference]: With dead ends: 1347 [2021-06-05 22:29:45,142 INFO L226 Difference]: Without dead ends: 1274 [2021-06-05 22:29:45,142 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 504.4ms TimeCoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:29:45,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2021-06-05 22:29:45,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 940. [2021-06-05 22:29:45,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 939 states have (on average 3.961661341853035) internal successors, (3720), 939 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:45,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 3720 transitions. [2021-06-05 22:29:45,154 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 3720 transitions. Word has length 26 [2021-06-05 22:29:45,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:45,154 INFO L482 AbstractCegarLoop]: Abstraction has 940 states and 3720 transitions. [2021-06-05 22:29:45,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:45,154 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 3720 transitions. [2021-06-05 22:29:45,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:29:45,156 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:45,156 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:45,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-05 22:29:45,357 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:45,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:45,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1144526604, now seen corresponding path program 13 times [2021-06-05 22:29:45,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:45,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487836755] [2021-06-05 22:29:45,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:45,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:45,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:45,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:45,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487836755] [2021-06-05 22:29:45,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487836755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:45,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925745441] [2021-06-05 22:29:45,427 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:45,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:45,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:29:45,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:45,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:29:45,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:29:45,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:29:45,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:45,538 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:45,539 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 22:29:45,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:45,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925745441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:45,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:45,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:29:45,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583075756] [2021-06-05 22:29:45,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:29:45,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:45,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:29:45,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:29:45,591 INFO L87 Difference]: Start difference. First operand 940 states and 3720 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:45,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:45,835 INFO L93 Difference]: Finished difference Result 1292 states and 5072 transitions. [2021-06-05 22:29:45,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:29:45,836 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:29:45,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:45,838 INFO L225 Difference]: With dead ends: 1292 [2021-06-05 22:29:45,838 INFO L226 Difference]: Without dead ends: 1217 [2021-06-05 22:29:45,838 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 169.1ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:29:45,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2021-06-05 22:29:45,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 922. [2021-06-05 22:29:45,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 3.958740499457112) internal successors, (3646), 921 states have internal predecessors, (3646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:45,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 3646 transitions. [2021-06-05 22:29:45,850 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 3646 transitions. Word has length 26 [2021-06-05 22:29:45,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:45,850 INFO L482 AbstractCegarLoop]: Abstraction has 922 states and 3646 transitions. [2021-06-05 22:29:45,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:45,850 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 3646 transitions. [2021-06-05 22:29:45,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:29:45,851 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:45,851 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:46,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:46,052 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:46,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:46,052 INFO L82 PathProgramCache]: Analyzing trace with hash -457858102, now seen corresponding path program 14 times [2021-06-05 22:29:46,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:46,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911107796] [2021-06-05 22:29:46,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:46,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:46,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:46,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:46,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911107796] [2021-06-05 22:29:46,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911107796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:46,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286573176] [2021-06-05 22:29:46,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:46,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:29:46,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:46,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:29:46,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:46,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:29:46,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 22:29:46,247 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:29:46,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:46,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:46,253 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-05 22:29:46,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:46,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286573176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:46,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:46,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:29:46,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690729968] [2021-06-05 22:29:46,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:29:46,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:46,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:29:46,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:29:46,293 INFO L87 Difference]: Start difference. First operand 922 states and 3646 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:46,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:46,623 INFO L93 Difference]: Finished difference Result 1628 states and 6288 transitions. [2021-06-05 22:29:46,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:29:46,623 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:29:46,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:46,625 INFO L225 Difference]: With dead ends: 1628 [2021-06-05 22:29:46,625 INFO L226 Difference]: Without dead ends: 1537 [2021-06-05 22:29:46,625 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 202.1ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:29:46,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1537 states. [2021-06-05 22:29:46,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1537 to 964. [2021-06-05 22:29:46,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 964 states, 963 states have (on average 3.936656282450675) internal successors, (3791), 963 states have internal predecessors, (3791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:46,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 3791 transitions. [2021-06-05 22:29:46,639 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 3791 transitions. Word has length 26 [2021-06-05 22:29:46,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:46,639 INFO L482 AbstractCegarLoop]: Abstraction has 964 states and 3791 transitions. [2021-06-05 22:29:46,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:46,639 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 3791 transitions. [2021-06-05 22:29:46,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:29:46,641 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:46,641 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:46,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-06-05 22:29:46,842 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:46,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:46,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1044326460, now seen corresponding path program 14 times [2021-06-05 22:29:46,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:46,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174600532] [2021-06-05 22:29:46,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:46,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:46,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:46,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:46,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174600532] [2021-06-05 22:29:46,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174600532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:46,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394143684] [2021-06-05 22:29:46,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:46,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:29:46,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:46,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:29:46,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:47,070 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:47,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 22:29:47,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:29:47,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:47,086 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:47,086 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:35 [2021-06-05 22:29:47,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:47,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394143684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:47,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:47,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 22:29:47,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139790897] [2021-06-05 22:29:47,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:29:47,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:47,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:29:47,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:29:47,177 INFO L87 Difference]: Start difference. First operand 964 states and 3791 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:47,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:47,760 INFO L93 Difference]: Finished difference Result 1476 states and 5781 transitions. [2021-06-05 22:29:47,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:29:47,760 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:29:47,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:47,762 INFO L225 Difference]: With dead ends: 1476 [2021-06-05 22:29:47,762 INFO L226 Difference]: Without dead ends: 1394 [2021-06-05 22:29:47,762 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 426.9ms TimeCoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:29:47,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1394 states. [2021-06-05 22:29:47,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1394 to 931. [2021-06-05 22:29:47,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.955913978494624) internal successors, (3679), 930 states have internal predecessors, (3679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:47,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3679 transitions. [2021-06-05 22:29:47,775 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3679 transitions. Word has length 26 [2021-06-05 22:29:47,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:47,775 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 3679 transitions. [2021-06-05 22:29:47,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:47,775 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3679 transitions. [2021-06-05 22:29:47,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:29:47,777 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:47,777 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:47,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:47,977 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:47,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:47,978 INFO L82 PathProgramCache]: Analyzing trace with hash -542256876, now seen corresponding path program 15 times [2021-06-05 22:29:47,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:47,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360915528] [2021-06-05 22:29:47,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:47,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:48,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:48,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:48,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360915528] [2021-06-05 22:29:48,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360915528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:48,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050298304] [2021-06-05 22:29:48,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:48,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:29:48,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:48,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:29:48,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:48,160 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:48,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 22:29:48,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:29:48,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:48,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:48,179 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:38 [2021-06-05 22:29:48,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:48,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050298304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:48,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:48,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 22:29:48,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045905962] [2021-06-05 22:29:48,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:29:48,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:48,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:29:48,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:29:48,303 INFO L87 Difference]: Start difference. First operand 931 states and 3679 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:48,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:48,967 INFO L93 Difference]: Finished difference Result 1720 states and 6672 transitions. [2021-06-05 22:29:48,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:29:48,967 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:29:48,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:48,969 INFO L225 Difference]: With dead ends: 1720 [2021-06-05 22:29:48,969 INFO L226 Difference]: Without dead ends: 1556 [2021-06-05 22:29:48,970 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 513.4ms TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:29:48,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1556 states. [2021-06-05 22:29:48,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1556 to 931. [2021-06-05 22:29:48,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.955913978494624) internal successors, (3679), 930 states have internal predecessors, (3679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:48,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3679 transitions. [2021-06-05 22:29:48,982 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3679 transitions. Word has length 26 [2021-06-05 22:29:48,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:48,982 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 3679 transitions. [2021-06-05 22:29:48,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:48,983 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3679 transitions. [2021-06-05 22:29:48,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:29:48,984 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:48,984 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:49,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-06-05 22:29:49,185 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:49,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:49,185 INFO L82 PathProgramCache]: Analyzing trace with hash 349033132, now seen corresponding path program 16 times [2021-06-05 22:29:49,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:49,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170907435] [2021-06-05 22:29:49,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:49,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:49,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:49,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:49,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170907435] [2021-06-05 22:29:49,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170907435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:49,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038996613] [2021-06-05 22:29:49,277 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:49,311 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:29:49,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:49,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:29:49,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:49,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:29:49,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:29:49,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:29:49,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:49,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:49,372 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 22:29:49,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:49,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038996613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:49,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:49,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:29:49,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844511072] [2021-06-05 22:29:49,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:29:49,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:49,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:29:49,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:29:49,424 INFO L87 Difference]: Start difference. First operand 931 states and 3679 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:49,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:49,766 INFO L93 Difference]: Finished difference Result 1440 states and 5633 transitions. [2021-06-05 22:29:49,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:29:49,766 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:29:49,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:49,769 INFO L225 Difference]: With dead ends: 1440 [2021-06-05 22:29:49,769 INFO L226 Difference]: Without dead ends: 1350 [2021-06-05 22:29:49,769 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 197.8ms TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:29:49,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2021-06-05 22:29:49,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 931. [2021-06-05 22:29:49,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.955913978494624) internal successors, (3679), 930 states have internal predecessors, (3679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:49,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3679 transitions. [2021-06-05 22:29:49,781 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3679 transitions. Word has length 26 [2021-06-05 22:29:49,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:49,782 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 3679 transitions. [2021-06-05 22:29:49,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:49,782 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3679 transitions. [2021-06-05 22:29:49,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:29:49,784 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:49,784 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:49,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:49,984 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:49,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:49,985 INFO L82 PathProgramCache]: Analyzing trace with hash -972873768, now seen corresponding path program 15 times [2021-06-05 22:29:49,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:49,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70566626] [2021-06-05 22:29:49,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:49,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:50,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:50,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:50,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70566626] [2021-06-05 22:29:50,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70566626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:50,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427466701] [2021-06-05 22:29:50,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:50,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:29:50,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:50,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:29:50,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:50,178 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:50,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 22:29:50,179 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:29:50,188 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:50,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:50,190 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:32 [2021-06-05 22:29:50,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:50,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427466701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:50,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:50,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 22:29:50,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48158907] [2021-06-05 22:29:50,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 22:29:50,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:50,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 22:29:50,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:29:50,278 INFO L87 Difference]: Start difference. First operand 931 states and 3679 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:51,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:51,332 INFO L93 Difference]: Finished difference Result 1839 states and 7230 transitions. [2021-06-05 22:29:51,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:29:51,332 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:29:51,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:51,335 INFO L225 Difference]: With dead ends: 1839 [2021-06-05 22:29:51,335 INFO L226 Difference]: Without dead ends: 1757 [2021-06-05 22:29:51,335 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 762.9ms TimeCoverageRelationStatistics Valid=286, Invalid=1046, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:29:51,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1757 states. [2021-06-05 22:29:51,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1757 to 940. [2021-06-05 22:29:51,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 939 states have (on average 3.957401490947817) internal successors, (3716), 939 states have internal predecessors, (3716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:51,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 3716 transitions. [2021-06-05 22:29:51,349 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 3716 transitions. Word has length 26 [2021-06-05 22:29:51,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:51,349 INFO L482 AbstractCegarLoop]: Abstraction has 940 states and 3716 transitions. [2021-06-05 22:29:51,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:51,350 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 3716 transitions. [2021-06-05 22:29:51,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:29:51,351 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:51,351 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:51,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-05 22:29:51,551 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:51,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:51,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1940178124, now seen corresponding path program 16 times [2021-06-05 22:29:51,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:51,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413706795] [2021-06-05 22:29:51,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:51,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:51,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:51,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:51,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413706795] [2021-06-05 22:29:51,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413706795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:51,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110855369] [2021-06-05 22:29:51,617 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:51,650 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:29:51,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:51,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:29:51,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:51,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:29:51,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:29:51,701 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:29:51,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:51,711 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:51,711 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 22:29:51,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:51,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110855369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:51,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:51,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:29:51,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317857191] [2021-06-05 22:29:51,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:29:51,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:51,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:29:51,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:29:51,762 INFO L87 Difference]: Start difference. First operand 940 states and 3716 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:51,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:51,978 INFO L93 Difference]: Finished difference Result 1338 states and 5238 transitions. [2021-06-05 22:29:51,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:29:51,978 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:29:51,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:51,981 INFO L225 Difference]: With dead ends: 1338 [2021-06-05 22:29:51,981 INFO L226 Difference]: Without dead ends: 1265 [2021-06-05 22:29:51,981 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 158.8ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:29:51,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2021-06-05 22:29:51,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 922. [2021-06-05 22:29:51,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 3.958740499457112) internal successors, (3646), 921 states have internal predecessors, (3646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:51,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 3646 transitions. [2021-06-05 22:29:51,993 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 3646 transitions. Word has length 26 [2021-06-05 22:29:51,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:51,994 INFO L482 AbstractCegarLoop]: Abstraction has 922 states and 3646 transitions. [2021-06-05 22:29:51,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:51,994 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 3646 transitions. [2021-06-05 22:29:51,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:29:51,995 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:51,995 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:52,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:52,196 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:52,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:52,196 INFO L82 PathProgramCache]: Analyzing trace with hash -903815988, now seen corresponding path program 14 times [2021-06-05 22:29:52,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:52,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169509285] [2021-06-05 22:29:52,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:52,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:52,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:52,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:52,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169509285] [2021-06-05 22:29:52,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169509285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:52,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824217495] [2021-06-05 22:29:52,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:52,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:29:52,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:52,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:29:52,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:52,385 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:52,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 22:29:52,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:29:52,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:52,398 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:52,398 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:20 [2021-06-05 22:29:52,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:52,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824217495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:52,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:52,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 22:29:52,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561787625] [2021-06-05 22:29:52,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:29:52,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:52,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:29:52,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:29:52,462 INFO L87 Difference]: Start difference. First operand 922 states and 3646 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:53,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:53,253 INFO L93 Difference]: Finished difference Result 1733 states and 6757 transitions. [2021-06-05 22:29:53,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:29:53,253 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:29:53,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:53,256 INFO L225 Difference]: With dead ends: 1733 [2021-06-05 22:29:53,256 INFO L226 Difference]: Without dead ends: 1660 [2021-06-05 22:29:53,256 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 533.8ms TimeCoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:29:53,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1660 states. [2021-06-05 22:29:53,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1660 to 958. [2021-06-05 22:29:53,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 958 states, 957 states have (on average 3.941483803552769) internal successors, (3772), 957 states have internal predecessors, (3772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:53,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 3772 transitions. [2021-06-05 22:29:53,270 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 3772 transitions. Word has length 26 [2021-06-05 22:29:53,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:53,270 INFO L482 AbstractCegarLoop]: Abstraction has 958 states and 3772 transitions. [2021-06-05 22:29:53,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:53,270 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 3772 transitions. [2021-06-05 22:29:53,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:29:53,272 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:53,272 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:53,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:53,477 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:53,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:53,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1614115146, now seen corresponding path program 14 times [2021-06-05 22:29:53,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:53,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383208848] [2021-06-05 22:29:53,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:53,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:53,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:53,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:53,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383208848] [2021-06-05 22:29:53,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383208848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:53,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332064992] [2021-06-05 22:29:53,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:53,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:29:53,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:53,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:29:53,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:53,716 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:53,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 22:29:53,717 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:29:53,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:53,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:53,731 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:20 [2021-06-05 22:29:53,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:53,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332064992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:53,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:53,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 22:29:53,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791652153] [2021-06-05 22:29:53,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:29:53,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:53,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:29:53,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:29:53,809 INFO L87 Difference]: Start difference. First operand 958 states and 3772 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:54,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:54,721 INFO L93 Difference]: Finished difference Result 1686 states and 6593 transitions. [2021-06-05 22:29:54,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:29:54,721 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:29:54,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:54,724 INFO L225 Difference]: With dead ends: 1686 [2021-06-05 22:29:54,724 INFO L226 Difference]: Without dead ends: 1613 [2021-06-05 22:29:54,724 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 554.5ms TimeCoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:29:54,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1613 states. [2021-06-05 22:29:54,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1613 to 931. [2021-06-05 22:29:54,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.9591397849462364) internal successors, (3682), 930 states have internal predecessors, (3682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:54,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3682 transitions. [2021-06-05 22:29:54,738 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3682 transitions. Word has length 26 [2021-06-05 22:29:54,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:54,738 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 3682 transitions. [2021-06-05 22:29:54,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:54,738 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3682 transitions. [2021-06-05 22:29:54,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:29:54,739 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:54,739 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:54,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:54,940 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:54,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:54,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1878957560, now seen corresponding path program 15 times [2021-06-05 22:29:54,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:54,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192571095] [2021-06-05 22:29:54,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:54,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:55,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:55,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:55,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192571095] [2021-06-05 22:29:55,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192571095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:55,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892333475] [2021-06-05 22:29:55,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:55,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:29:55,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:55,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:29:55,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:55,134 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:55,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 22:29:55,136 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:29:55,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:55,145 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:55,145 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 22:29:55,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:55,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892333475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:55,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:55,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 22:29:55,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596115707] [2021-06-05 22:29:55,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:29:55,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:55,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:29:55,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:29:55,246 INFO L87 Difference]: Start difference. First operand 931 states and 3682 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:56,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:56,357 INFO L93 Difference]: Finished difference Result 1771 states and 6888 transitions. [2021-06-05 22:29:56,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:29:56,358 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:29:56,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:56,360 INFO L225 Difference]: With dead ends: 1771 [2021-06-05 22:29:56,360 INFO L226 Difference]: Without dead ends: 1698 [2021-06-05 22:29:56,361 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 818.0ms TimeCoverageRelationStatistics Valid=337, Invalid=1223, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:29:56,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1698 states. [2021-06-05 22:29:56,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1698 to 940. [2021-06-05 22:29:56,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 939 states have (on average 3.9605963791267307) internal successors, (3719), 939 states have internal predecessors, (3719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:56,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 3719 transitions. [2021-06-05 22:29:56,375 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 3719 transitions. Word has length 26 [2021-06-05 22:29:56,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:56,375 INFO L482 AbstractCegarLoop]: Abstraction has 940 states and 3719 transitions. [2021-06-05 22:29:56,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:56,375 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 3719 transitions. [2021-06-05 22:29:56,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:29:56,376 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:56,376 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:56,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-05 22:29:56,577 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:56,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:56,577 INFO L82 PathProgramCache]: Analyzing trace with hash 2102483340, now seen corresponding path program 16 times [2021-06-05 22:29:56,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:56,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400840229] [2021-06-05 22:29:56,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:56,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:56,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:56,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:56,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400840229] [2021-06-05 22:29:56,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400840229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:56,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533313120] [2021-06-05 22:29:56,640 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:56,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:29:56,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:56,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:29:56,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:56,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:29:56,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:29:56,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:29:56,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:56,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:56,761 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 22:29:56,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:56,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533313120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:56,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:56,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:29:56,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26390899] [2021-06-05 22:29:56,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:29:56,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:56,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:29:56,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:29:56,818 INFO L87 Difference]: Start difference. First operand 940 states and 3719 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:57,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:57,162 INFO L93 Difference]: Finished difference Result 1357 states and 5335 transitions. [2021-06-05 22:29:57,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:29:57,162 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:29:57,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:57,165 INFO L225 Difference]: With dead ends: 1357 [2021-06-05 22:29:57,165 INFO L226 Difference]: Without dead ends: 1274 [2021-06-05 22:29:57,165 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 177.7ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:29:57,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2021-06-05 22:29:57,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 931. [2021-06-05 22:29:57,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.9591397849462364) internal successors, (3682), 930 states have internal predecessors, (3682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:57,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3682 transitions. [2021-06-05 22:29:57,181 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3682 transitions. Word has length 26 [2021-06-05 22:29:57,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:57,181 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 3682 transitions. [2021-06-05 22:29:57,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:57,182 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3682 transitions. [2021-06-05 22:29:57,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:29:57,183 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:57,183 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:57,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-06-05 22:29:57,405 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:57,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:57,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1242984242, now seen corresponding path program 15 times [2021-06-05 22:29:57,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:57,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605952956] [2021-06-05 22:29:57,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:57,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:57,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:57,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:57,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605952956] [2021-06-05 22:29:57,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605952956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:57,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416827125] [2021-06-05 22:29:57,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:57,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:29:57,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:57,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:29:57,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:57,587 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:57,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 22:29:57,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:29:57,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:57,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:57,600 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 22:29:57,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:57,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416827125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:57,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:57,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 22:29:57,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062840277] [2021-06-05 22:29:57,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:29:57,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:57,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:29:57,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:29:57,701 INFO L87 Difference]: Start difference. First operand 931 states and 3682 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:58,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:58,489 INFO L93 Difference]: Finished difference Result 1666 states and 6528 transitions. [2021-06-05 22:29:58,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:29:58,490 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:29:58,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:58,492 INFO L225 Difference]: With dead ends: 1666 [2021-06-05 22:29:58,492 INFO L226 Difference]: Without dead ends: 1593 [2021-06-05 22:29:58,492 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 582.8ms TimeCoverageRelationStatistics Valid=187, Invalid=743, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:29:58,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1593 states. [2021-06-05 22:29:58,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1593 to 940. [2021-06-05 22:29:58,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 939 states have (on average 3.961661341853035) internal successors, (3720), 939 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:58,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 3720 transitions. [2021-06-05 22:29:58,508 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 3720 transitions. Word has length 26 [2021-06-05 22:29:58,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:58,508 INFO L482 AbstractCegarLoop]: Abstraction has 940 states and 3720 transitions. [2021-06-05 22:29:58,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:58,508 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 3720 transitions. [2021-06-05 22:29:58,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:29:58,509 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:58,509 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:58,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-06-05 22:29:58,710 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:58,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:58,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1070782094, now seen corresponding path program 16 times [2021-06-05 22:29:58,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:58,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524444095] [2021-06-05 22:29:58,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:58,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:58,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:58,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:58,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524444095] [2021-06-05 22:29:58,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524444095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:58,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398811154] [2021-06-05 22:29:58,770 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:58,804 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:29:58,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:58,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:29:58,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:58,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:29:58,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:29:58,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:29:58,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:58,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:58,873 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 22:29:58,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:58,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398811154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:58,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:58,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:29:58,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148775539] [2021-06-05 22:29:58,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:29:58,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:58,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:29:58,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:29:58,923 INFO L87 Difference]: Start difference. First operand 940 states and 3720 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:59,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:29:59,121 INFO L93 Difference]: Finished difference Result 1299 states and 5104 transitions. [2021-06-05 22:29:59,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:29:59,121 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:29:59,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:29:59,123 INFO L225 Difference]: With dead ends: 1299 [2021-06-05 22:29:59,123 INFO L226 Difference]: Without dead ends: 1224 [2021-06-05 22:29:59,123 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 160.6ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:29:59,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1224 states. [2021-06-05 22:29:59,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1224 to 922. [2021-06-05 22:29:59,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 3.958740499457112) internal successors, (3646), 921 states have internal predecessors, (3646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:59,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 3646 transitions. [2021-06-05 22:29:59,135 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 3646 transitions. Word has length 26 [2021-06-05 22:29:59,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:29:59,135 INFO L482 AbstractCegarLoop]: Abstraction has 922 states and 3646 transitions. [2021-06-05 22:29:59,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:29:59,135 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 3646 transitions. [2021-06-05 22:29:59,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:29:59,136 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:29:59,136 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:29:59,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:59,339 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:29:59,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:29:59,339 INFO L82 PathProgramCache]: Analyzing trace with hash 514209786, now seen corresponding path program 17 times [2021-06-05 22:29:59,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:29:59,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48654370] [2021-06-05 22:29:59,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:29:59,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:29:59,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:59,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:29:59,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48654370] [2021-06-05 22:29:59,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48654370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:59,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285570556] [2021-06-05 22:29:59,425 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:29:59,459 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:29:59,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:29:59,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:29:59,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:29:59,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:29:59,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 22:29:59,533 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:29:59,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:29:59,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:29:59,539 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-05 22:29:59,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:29:59,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285570556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:29:59,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:29:59,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 22:29:59,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313726310] [2021-06-05 22:29:59,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:29:59,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:29:59,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:29:59,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:29:59,580 INFO L87 Difference]: Start difference. First operand 922 states and 3646 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:00,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:00,151 INFO L93 Difference]: Finished difference Result 2168 states and 8464 transitions. [2021-06-05 22:30:00,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:30:00,151 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:30:00,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:00,154 INFO L225 Difference]: With dead ends: 2168 [2021-06-05 22:30:00,154 INFO L226 Difference]: Without dead ends: 2086 [2021-06-05 22:30:00,154 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 318.0ms TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:30:00,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2086 states. [2021-06-05 22:30:00,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2086 to 984. [2021-06-05 22:30:00,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 984 states, 983 states have (on average 3.9114954221770093) internal successors, (3845), 983 states have internal predecessors, (3845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:00,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 3845 transitions. [2021-06-05 22:30:00,170 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 3845 transitions. Word has length 26 [2021-06-05 22:30:00,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:00,170 INFO L482 AbstractCegarLoop]: Abstraction has 984 states and 3845 transitions. [2021-06-05 22:30:00,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:00,170 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 3845 transitions. [2021-06-05 22:30:00,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:30:00,171 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:00,171 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:00,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:00,372 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:00,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:00,372 INFO L82 PathProgramCache]: Analyzing trace with hash -72258572, now seen corresponding path program 17 times [2021-06-05 22:30:00,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:00,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746598868] [2021-06-05 22:30:00,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:00,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:00,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:00,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:00,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746598868] [2021-06-05 22:30:00,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746598868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:00,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653517876] [2021-06-05 22:30:00,441 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:00,475 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:30:00,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:00,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:30:00,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:00,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:30:00,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 22:30:00,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:00,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:00,557 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:00,557 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-05 22:30:00,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:00,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653517876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:00,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:00,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:30:00,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433565482] [2021-06-05 22:30:00,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:30:00,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:00,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:30:00,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:30:00,596 INFO L87 Difference]: Start difference. First operand 984 states and 3845 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:01,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:01,036 INFO L93 Difference]: Finished difference Result 2118 states and 8296 transitions. [2021-06-05 22:30:01,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:30:01,037 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:30:01,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:01,040 INFO L225 Difference]: With dead ends: 2118 [2021-06-05 22:30:01,040 INFO L226 Difference]: Without dead ends: 2036 [2021-06-05 22:30:01,040 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 217.2ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:30:01,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2036 states. [2021-06-05 22:30:01,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2036 to 954. [2021-06-05 22:30:01,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 953 states have (on average 3.931794333683106) internal successors, (3747), 953 states have internal predecessors, (3747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:01,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 3747 transitions. [2021-06-05 22:30:01,061 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 3747 transitions. Word has length 26 [2021-06-05 22:30:01,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:01,061 INFO L482 AbstractCegarLoop]: Abstraction has 954 states and 3747 transitions. [2021-06-05 22:30:01,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:01,061 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 3747 transitions. [2021-06-05 22:30:01,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:30:01,063 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:01,063 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:01,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:01,281 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:01,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:01,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1300056958, now seen corresponding path program 18 times [2021-06-05 22:30:01,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:01,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287069166] [2021-06-05 22:30:01,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:01,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:01,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:01,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:01,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287069166] [2021-06-05 22:30:01,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287069166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:01,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866841497] [2021-06-05 22:30:01,370 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:01,405 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:30:01,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:01,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:30:01,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:01,490 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:01,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 22:30:01,491 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:30:01,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:01,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:01,499 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:18 [2021-06-05 22:30:01,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:01,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866841497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:01,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:01,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 22:30:01,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471999377] [2021-06-05 22:30:01,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:30:01,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:01,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:30:01,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:30:01,565 INFO L87 Difference]: Start difference. First operand 954 states and 3747 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:02,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:02,226 INFO L93 Difference]: Finished difference Result 2208 states and 8474 transitions. [2021-06-05 22:30:02,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:30:02,226 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:30:02,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:02,230 INFO L225 Difference]: With dead ends: 2208 [2021-06-05 22:30:02,230 INFO L226 Difference]: Without dead ends: 2044 [2021-06-05 22:30:02,230 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 429.9ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:30:02,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2044 states. [2021-06-05 22:30:02,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2044 to 996. [2021-06-05 22:30:02,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 995 states have (on average 3.9115577889447235) internal successors, (3892), 995 states have internal predecessors, (3892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:02,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 3892 transitions. [2021-06-05 22:30:02,246 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 3892 transitions. Word has length 26 [2021-06-05 22:30:02,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:02,247 INFO L482 AbstractCegarLoop]: Abstraction has 996 states and 3892 transitions. [2021-06-05 22:30:02,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:02,247 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 3892 transitions. [2021-06-05 22:30:02,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:30:02,248 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:02,248 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:02,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2021-06-05 22:30:02,449 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:02,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:02,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1886525316, now seen corresponding path program 18 times [2021-06-05 22:30:02,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:02,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908119249] [2021-06-05 22:30:02,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:02,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:02,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:02,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:02,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908119249] [2021-06-05 22:30:02,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908119249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:02,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251857334] [2021-06-05 22:30:02,548 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:02,581 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:30:02,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:02,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:30:02,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:02,710 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:02,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 22:30:02,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:30:02,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:02,728 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:02,728 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:35 [2021-06-05 22:30:02,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:02,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251857334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:02,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:02,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 22:30:02,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92574874] [2021-06-05 22:30:02,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:30:02,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:02,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:30:02,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:30:02,811 INFO L87 Difference]: Start difference. First operand 996 states and 3892 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:03,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:03,491 INFO L93 Difference]: Finished difference Result 1639 states and 6401 transitions. [2021-06-05 22:30:03,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:30:03,491 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:30:03,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:03,494 INFO L225 Difference]: With dead ends: 1639 [2021-06-05 22:30:03,494 INFO L226 Difference]: Without dead ends: 1557 [2021-06-05 22:30:03,494 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 470.3ms TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:30:03,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1557 states. [2021-06-05 22:30:03,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1557 to 963. [2021-06-05 22:30:03,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.9293139293139294) internal successors, (3780), 962 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:03,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3780 transitions. [2021-06-05 22:30:03,508 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3780 transitions. Word has length 26 [2021-06-05 22:30:03,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:03,508 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3780 transitions. [2021-06-05 22:30:03,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:03,509 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3780 transitions. [2021-06-05 22:30:03,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:30:03,510 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:03,510 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:03,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-05 22:30:03,711 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:03,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:03,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1153064272, now seen corresponding path program 19 times [2021-06-05 22:30:03,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:03,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280506936] [2021-06-05 22:30:03,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:03,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:03,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:03,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:03,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280506936] [2021-06-05 22:30:03,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280506936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:03,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6120062] [2021-06-05 22:30:03,815 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:03,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:03,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:30:03,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:03,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:30:03,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:30:03,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:03,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:03,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:03,929 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 22:30:03,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:03,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6120062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:03,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:03,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 22:30:03,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518263928] [2021-06-05 22:30:03,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:30:03,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:03,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:30:03,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:30:03,983 INFO L87 Difference]: Start difference. First operand 963 states and 3780 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:04,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:04,493 INFO L93 Difference]: Finished difference Result 1759 states and 6856 transitions. [2021-06-05 22:30:04,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:30:04,493 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:30:04,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:04,496 INFO L225 Difference]: With dead ends: 1759 [2021-06-05 22:30:04,496 INFO L226 Difference]: Without dead ends: 1668 [2021-06-05 22:30:04,496 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 319.1ms TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:30:04,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1668 states. [2021-06-05 22:30:04,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1668 to 963. [2021-06-05 22:30:04,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.9293139293139294) internal successors, (3780), 962 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:04,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3780 transitions. [2021-06-05 22:30:04,510 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3780 transitions. Word has length 26 [2021-06-05 22:30:04,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:04,511 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3780 transitions. [2021-06-05 22:30:04,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:04,511 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3780 transitions. [2021-06-05 22:30:04,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:30:04,512 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:04,512 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:04,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-06-05 22:30:04,717 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:04,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:04,718 INFO L82 PathProgramCache]: Analyzing trace with hash 2044354280, now seen corresponding path program 20 times [2021-06-05 22:30:04,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:04,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421496933] [2021-06-05 22:30:04,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:04,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:04,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:04,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:04,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421496933] [2021-06-05 22:30:04,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421496933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:04,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165175624] [2021-06-05 22:30:04,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:04,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:30:04,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:04,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:30:04,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:04,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:30:04,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:30:04,929 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:04,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:04,937 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:04,937 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 22:30:04,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:04,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165175624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:04,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:04,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 22:30:04,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962468185] [2021-06-05 22:30:04,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:30:04,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:04,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:30:04,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:30:04,990 INFO L87 Difference]: Start difference. First operand 963 states and 3780 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:05,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:05,546 INFO L93 Difference]: Finished difference Result 1718 states and 6708 transitions. [2021-06-05 22:30:05,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:30:05,546 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:30:05,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:05,549 INFO L225 Difference]: With dead ends: 1718 [2021-06-05 22:30:05,549 INFO L226 Difference]: Without dead ends: 1628 [2021-06-05 22:30:05,549 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 349.1ms TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:30:05,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1628 states. [2021-06-05 22:30:05,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1628 to 963. [2021-06-05 22:30:05,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.9293139293139294) internal successors, (3780), 962 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:05,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3780 transitions. [2021-06-05 22:30:05,563 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3780 transitions. Word has length 26 [2021-06-05 22:30:05,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:05,564 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3780 transitions. [2021-06-05 22:30:05,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:05,564 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3780 transitions. [2021-06-05 22:30:05,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:30:05,565 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:05,565 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:05,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:05,767 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:05,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:05,768 INFO L82 PathProgramCache]: Analyzing trace with hash 722447380, now seen corresponding path program 19 times [2021-06-05 22:30:05,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:05,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324069650] [2021-06-05 22:30:05,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:05,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:05,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:05,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:05,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324069650] [2021-06-05 22:30:05,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324069650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:05,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908672583] [2021-06-05 22:30:05,850 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:05,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:05,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:30:05,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:05,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:30:05,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:30:05,952 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:05,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:05,959 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:05,960 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 22:30:06,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:06,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908672583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:06,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:06,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:30:06,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579341386] [2021-06-05 22:30:06,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:30:06,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:06,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:30:06,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:30:06,011 INFO L87 Difference]: Start difference. First operand 963 states and 3780 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:06,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:06,346 INFO L93 Difference]: Finished difference Result 1509 states and 5906 transitions. [2021-06-05 22:30:06,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:30:06,346 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:30:06,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:06,349 INFO L225 Difference]: With dead ends: 1509 [2021-06-05 22:30:06,349 INFO L226 Difference]: Without dead ends: 1427 [2021-06-05 22:30:06,349 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 207.8ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:30:06,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1427 states. [2021-06-05 22:30:06,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1427 to 972. [2021-06-05 22:30:06,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 971 states have (on average 3.9309989701338828) internal successors, (3817), 971 states have internal predecessors, (3817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:06,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 3817 transitions. [2021-06-05 22:30:06,375 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 3817 transitions. Word has length 26 [2021-06-05 22:30:06,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:06,375 INFO L482 AbstractCegarLoop]: Abstraction has 972 states and 3817 transitions. [2021-06-05 22:30:06,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:06,375 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 3817 transitions. [2021-06-05 22:30:06,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:30:06,377 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:06,377 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:06,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:06,593 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:06,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:06,593 INFO L82 PathProgramCache]: Analyzing trace with hash -659468024, now seen corresponding path program 20 times [2021-06-05 22:30:06,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:06,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773162211] [2021-06-05 22:30:06,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:06,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:06,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:06,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:06,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773162211] [2021-06-05 22:30:06,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773162211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:06,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154901470] [2021-06-05 22:30:06,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:06,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:30:06,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:06,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:30:06,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:06,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:30:06,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:30:06,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:06,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:06,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:06,778 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 22:30:06,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:06,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154901470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:06,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:06,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:30:06,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366766852] [2021-06-05 22:30:06,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:30:06,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:06,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:30:06,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:30:06,829 INFO L87 Difference]: Start difference. First operand 972 states and 3817 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:07,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:07,156 INFO L93 Difference]: Finished difference Result 1493 states and 5826 transitions. [2021-06-05 22:30:07,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:30:07,156 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:30:07,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:07,158 INFO L225 Difference]: With dead ends: 1493 [2021-06-05 22:30:07,158 INFO L226 Difference]: Without dead ends: 1420 [2021-06-05 22:30:07,158 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 213.9ms TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:30:07,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1420 states. [2021-06-05 22:30:07,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1420 to 954. [2021-06-05 22:30:07,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 953 states have (on average 3.931794333683106) internal successors, (3747), 953 states have internal predecessors, (3747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:07,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 3747 transitions. [2021-06-05 22:30:07,174 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 3747 transitions. Word has length 26 [2021-06-05 22:30:07,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:07,174 INFO L482 AbstractCegarLoop]: Abstraction has 954 states and 3747 transitions. [2021-06-05 22:30:07,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:07,174 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 3747 transitions. [2021-06-05 22:30:07,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:30:07,175 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:07,175 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:07,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:07,381 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:07,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:07,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1371947268, now seen corresponding path program 17 times [2021-06-05 22:30:07,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:07,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672125423] [2021-06-05 22:30:07,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:07,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:07,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:07,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:07,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672125423] [2021-06-05 22:30:07,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672125423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:07,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87018648] [2021-06-05 22:30:07,543 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:07,584 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:30:07,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:07,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:30:07,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:07,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:30:07,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 22:30:07,676 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:07,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:07,683 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:07,683 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-05 22:30:07,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:07,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87018648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:07,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:07,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:30:07,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186347943] [2021-06-05 22:30:07,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:30:07,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:07,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:30:07,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:30:07,724 INFO L87 Difference]: Start difference. First operand 954 states and 3747 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:08,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:08,245 INFO L93 Difference]: Finished difference Result 1935 states and 7456 transitions. [2021-06-05 22:30:08,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:30:08,246 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:30:08,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:08,249 INFO L225 Difference]: With dead ends: 1935 [2021-06-05 22:30:08,249 INFO L226 Difference]: Without dead ends: 1862 [2021-06-05 22:30:08,249 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 278.0ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:30:08,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1862 states. [2021-06-05 22:30:08,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1862 to 1004. [2021-06-05 22:30:08,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1004 states, 1003 states have (on average 3.8913260219341974) internal successors, (3903), 1003 states have internal predecessors, (3903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:08,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 3903 transitions. [2021-06-05 22:30:08,265 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 3903 transitions. Word has length 26 [2021-06-05 22:30:08,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:08,265 INFO L482 AbstractCegarLoop]: Abstraction has 1004 states and 3903 transitions. [2021-06-05 22:30:08,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:08,265 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 3903 transitions. [2021-06-05 22:30:08,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:30:08,266 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:08,266 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:08,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:08,467 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:08,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:08,468 INFO L82 PathProgramCache]: Analyzing trace with hash -2082246426, now seen corresponding path program 17 times [2021-06-05 22:30:08,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:08,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548635623] [2021-06-05 22:30:08,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:08,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:08,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:08,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:08,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548635623] [2021-06-05 22:30:08,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548635623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:08,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976378820] [2021-06-05 22:30:08,536 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:08,578 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:30:08,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:08,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:30:08,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:08,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:30:08,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 22:30:08,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:08,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:08,701 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:08,701 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-05 22:30:08,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:08,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976378820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:08,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:08,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:30:08,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456167361] [2021-06-05 22:30:08,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:30:08,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:08,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:30:08,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:30:08,746 INFO L87 Difference]: Start difference. First operand 1004 states and 3903 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:09,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:09,162 INFO L93 Difference]: Finished difference Result 1890 states and 7297 transitions. [2021-06-05 22:30:09,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:30:09,162 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:30:09,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:09,165 INFO L225 Difference]: With dead ends: 1890 [2021-06-05 22:30:09,165 INFO L226 Difference]: Without dead ends: 1817 [2021-06-05 22:30:09,165 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 213.2ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:30:09,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1817 states. [2021-06-05 22:30:09,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1817 to 960. [2021-06-05 22:30:09,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 3.9280500521376434) internal successors, (3767), 959 states have internal predecessors, (3767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:09,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3767 transitions. [2021-06-05 22:30:09,181 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3767 transitions. Word has length 26 [2021-06-05 22:30:09,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:09,181 INFO L482 AbstractCegarLoop]: Abstraction has 960 states and 3767 transitions. [2021-06-05 22:30:09,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:09,181 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3767 transitions. [2021-06-05 22:30:09,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:30:09,183 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:09,183 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:09,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-05 22:30:09,397 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:09,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:09,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1349864576, now seen corresponding path program 18 times [2021-06-05 22:30:09,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:09,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126187030] [2021-06-05 22:30:09,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:09,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:09,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:09,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:09,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126187030] [2021-06-05 22:30:09,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126187030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:09,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390742614] [2021-06-05 22:30:09,453 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:09,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:30:09,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:09,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:30:09,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:09,593 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:09,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 22:30:09,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:30:09,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:09,611 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:09,611 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:20 [2021-06-05 22:30:09,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:09,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390742614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:09,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:09,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 22:30:09,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375902396] [2021-06-05 22:30:09,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:30:09,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:09,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:30:09,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:30:09,683 INFO L87 Difference]: Start difference. First operand 960 states and 3767 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:10,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:10,512 INFO L93 Difference]: Finished difference Result 1716 states and 6679 transitions. [2021-06-05 22:30:10,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:30:10,512 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:30:10,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:10,514 INFO L225 Difference]: With dead ends: 1716 [2021-06-05 22:30:10,514 INFO L226 Difference]: Without dead ends: 1643 [2021-06-05 22:30:10,515 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 566.6ms TimeCoverageRelationStatistics Valid=220, Invalid=970, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:30:10,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1643 states. [2021-06-05 22:30:10,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1643 to 996. [2021-06-05 22:30:10,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 995 states have (on average 3.912562814070352) internal successors, (3893), 995 states have internal predecessors, (3893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:10,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 3893 transitions. [2021-06-05 22:30:10,528 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 3893 transitions. Word has length 26 [2021-06-05 22:30:10,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:10,528 INFO L482 AbstractCegarLoop]: Abstraction has 996 states and 3893 transitions. [2021-06-05 22:30:10,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:10,529 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 3893 transitions. [2021-06-05 22:30:10,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:30:10,530 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:10,530 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:10,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-05 22:30:10,730 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:10,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:10,731 INFO L82 PathProgramCache]: Analyzing trace with hash -2060163734, now seen corresponding path program 18 times [2021-06-05 22:30:10,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:10,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719808087] [2021-06-05 22:30:10,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:10,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:10,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:10,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:10,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719808087] [2021-06-05 22:30:10,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719808087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:10,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251128427] [2021-06-05 22:30:10,784 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:10,818 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:30:10,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:10,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:30:10,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:10,920 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:10,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 22:30:10,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:30:10,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:10,932 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:10,933 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:20 [2021-06-05 22:30:10,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:10,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251128427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:10,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:10,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 22:30:10,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084829979] [2021-06-05 22:30:10,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:30:10,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:10,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:30:10,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:30:10,999 INFO L87 Difference]: Start difference. First operand 996 states and 3893 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:11,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:11,872 INFO L93 Difference]: Finished difference Result 1669 states and 6515 transitions. [2021-06-05 22:30:11,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:30:11,873 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:30:11,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:11,875 INFO L225 Difference]: With dead ends: 1669 [2021-06-05 22:30:11,875 INFO L226 Difference]: Without dead ends: 1596 [2021-06-05 22:30:11,875 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 552.6ms TimeCoverageRelationStatistics Valid=220, Invalid=970, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:30:11,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1596 states. [2021-06-05 22:30:11,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1596 to 969. [2021-06-05 22:30:11,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 969 states, 968 states have (on average 3.928719008264463) internal successors, (3803), 968 states have internal predecessors, (3803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:11,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 3803 transitions. [2021-06-05 22:30:11,889 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 3803 transitions. Word has length 26 [2021-06-05 22:30:11,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:11,889 INFO L482 AbstractCegarLoop]: Abstraction has 969 states and 3803 transitions. [2021-06-05 22:30:11,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:11,889 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 3803 transitions. [2021-06-05 22:30:11,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:30:11,890 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:11,890 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:12,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 22:30:12,091 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:12,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:12,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1969961148, now seen corresponding path program 19 times [2021-06-05 22:30:12,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:12,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706462102] [2021-06-05 22:30:12,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:12,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:12,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:12,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:12,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706462102] [2021-06-05 22:30:12,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706462102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:12,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061281230] [2021-06-05 22:30:12,157 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:12,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:12,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:30:12,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:12,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:30:12,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:30:12,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:12,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:12,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:12,279 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 22:30:12,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:12,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061281230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:12,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:12,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:30:12,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560261395] [2021-06-05 22:30:12,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:30:12,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:12,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:30:12,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:30:12,328 INFO L87 Difference]: Start difference. First operand 969 states and 3803 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:12,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:12,623 INFO L93 Difference]: Finished difference Result 1492 states and 5839 transitions. [2021-06-05 22:30:12,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:30:12,623 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:30:12,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:12,625 INFO L225 Difference]: With dead ends: 1492 [2021-06-05 22:30:12,625 INFO L226 Difference]: Without dead ends: 1419 [2021-06-05 22:30:12,626 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 184.9ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:30:12,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1419 states. [2021-06-05 22:30:12,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1419 to 978. [2021-06-05 22:30:12,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 978 states, 977 states have (on average 3.930399181166837) internal successors, (3840), 977 states have internal predecessors, (3840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:12,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 3840 transitions. [2021-06-05 22:30:12,638 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 3840 transitions. Word has length 26 [2021-06-05 22:30:12,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:12,638 INFO L482 AbstractCegarLoop]: Abstraction has 978 states and 3840 transitions. [2021-06-05 22:30:12,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:12,639 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 3840 transitions. [2021-06-05 22:30:12,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:30:12,640 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:12,640 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:12,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-06-05 22:30:12,841 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:12,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:12,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1656434752, now seen corresponding path program 20 times [2021-06-05 22:30:12,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:12,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461914457] [2021-06-05 22:30:12,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:12,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:12,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:12,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:12,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461914457] [2021-06-05 22:30:12,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461914457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:12,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236570656] [2021-06-05 22:30:12,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:12,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:30:12,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:12,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:30:12,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:13,030 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:13,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 22:30:13,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:30:13,042 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:13,042 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:13,042 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 22:30:13,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:13,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236570656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:13,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:13,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 22:30:13,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149318893] [2021-06-05 22:30:13,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:30:13,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:13,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:30:13,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:30:13,159 INFO L87 Difference]: Start difference. First operand 978 states and 3840 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:14,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:14,329 INFO L93 Difference]: Finished difference Result 1759 states and 6869 transitions. [2021-06-05 22:30:14,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:30:14,329 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:30:14,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:14,332 INFO L225 Difference]: With dead ends: 1759 [2021-06-05 22:30:14,332 INFO L226 Difference]: Without dead ends: 1676 [2021-06-05 22:30:14,332 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 751.5ms TimeCoverageRelationStatistics Valid=298, Invalid=1262, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:30:14,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1676 states. [2021-06-05 22:30:14,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1676 to 969. [2021-06-05 22:30:14,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 969 states, 968 states have (on average 3.928719008264463) internal successors, (3803), 968 states have internal predecessors, (3803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:14,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 3803 transitions. [2021-06-05 22:30:14,346 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 3803 transitions. Word has length 26 [2021-06-05 22:30:14,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:14,346 INFO L482 AbstractCegarLoop]: Abstraction has 969 states and 3803 transitions. [2021-06-05 22:30:14,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:14,346 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 3803 transitions. [2021-06-05 22:30:14,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:30:14,348 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:14,348 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:14,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:14,548 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:14,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:14,549 INFO L82 PathProgramCache]: Analyzing trace with hash 796935654, now seen corresponding path program 19 times [2021-06-05 22:30:14,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:14,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270138889] [2021-06-05 22:30:14,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:14,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:14,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:14,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:14,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270138889] [2021-06-05 22:30:14,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270138889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:14,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708243065] [2021-06-05 22:30:14,609 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:14,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:14,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 22:30:14,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:14,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:30:14,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:30:14,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:14,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:14,711 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:14,711 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 22:30:14,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:14,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708243065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:14,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:14,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 22:30:14,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132657398] [2021-06-05 22:30:14,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 22:30:14,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:14,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 22:30:14,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:30:14,760 INFO L87 Difference]: Start difference. First operand 969 states and 3803 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:15,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:15,088 INFO L93 Difference]: Finished difference Result 1439 states and 5646 transitions. [2021-06-05 22:30:15,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 22:30:15,089 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:30:15,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:15,091 INFO L225 Difference]: With dead ends: 1439 [2021-06-05 22:30:15,091 INFO L226 Difference]: Without dead ends: 1366 [2021-06-05 22:30:15,091 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 175.4ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:30:15,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1366 states. [2021-06-05 22:30:15,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1366 to 978. [2021-06-05 22:30:15,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 978 states, 977 states have (on average 3.9314227226202663) internal successors, (3841), 977 states have internal predecessors, (3841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:15,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 3841 transitions. [2021-06-05 22:30:15,104 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 3841 transitions. Word has length 26 [2021-06-05 22:30:15,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:15,104 INFO L482 AbstractCegarLoop]: Abstraction has 978 states and 3841 transitions. [2021-06-05 22:30:15,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:15,104 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 3841 transitions. [2021-06-05 22:30:15,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 22:30:15,106 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:15,106 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:15,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:15,318 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:15,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:15,318 INFO L82 PathProgramCache]: Analyzing trace with hash 624733506, now seen corresponding path program 20 times [2021-06-05 22:30:15,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:15,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145175156] [2021-06-05 22:30:15,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:15,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:15,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:15,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:15,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145175156] [2021-06-05 22:30:15,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145175156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:15,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094620612] [2021-06-05 22:30:15,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:15,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:30:15,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:15,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 22:30:15,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:15,495 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:15,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 22:30:15,496 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:30:15,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:15,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:15,506 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 22:30:15,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:15,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094620612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:15,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:15,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 22:30:15,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804676964] [2021-06-05 22:30:15,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 22:30:15,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:15,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 22:30:15,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:30:15,609 INFO L87 Difference]: Start difference. First operand 978 states and 3841 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:16,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:16,712 INFO L93 Difference]: Finished difference Result 1688 states and 6589 transitions. [2021-06-05 22:30:16,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:30:16,713 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 22:30:16,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:16,715 INFO L225 Difference]: With dead ends: 1688 [2021-06-05 22:30:16,715 INFO L226 Difference]: Without dead ends: 1613 [2021-06-05 22:30:16,716 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 727.6ms TimeCoverageRelationStatistics Valid=298, Invalid=1262, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:30:16,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1613 states. [2021-06-05 22:30:16,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1613 to 960. [2021-06-05 22:30:16,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 3.9280500521376434) internal successors, (3767), 959 states have internal predecessors, (3767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:16,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3767 transitions. [2021-06-05 22:30:16,729 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3767 transitions. Word has length 26 [2021-06-05 22:30:16,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:16,729 INFO L482 AbstractCegarLoop]: Abstraction has 960 states and 3767 transitions. [2021-06-05 22:30:16,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:16,729 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3767 transitions. [2021-06-05 22:30:16,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:30:16,731 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:16,731 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:16,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:16,932 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:16,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:16,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1823844999, now seen corresponding path program 21 times [2021-06-05 22:30:16,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:16,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435039874] [2021-06-05 22:30:16,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:16,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:16,960 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:16,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:16,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435039874] [2021-06-05 22:30:16,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435039874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:16,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605048815] [2021-06-05 22:30:16,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:16,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:30:16,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:16,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:30:16,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:17,067 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:17,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605048815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:17,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:17,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 22:30:17,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404939265] [2021-06-05 22:30:17,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:30:17,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:17,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:30:17,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:30:17,068 INFO L87 Difference]: Start difference. First operand 960 states and 3767 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:17,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:17,302 INFO L93 Difference]: Finished difference Result 3279 states and 12423 transitions. [2021-06-05 22:30:17,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:30:17,302 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 22:30:17,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:17,307 INFO L225 Difference]: With dead ends: 3279 [2021-06-05 22:30:17,307 INFO L226 Difference]: Without dead ends: 3102 [2021-06-05 22:30:17,307 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 143.6ms TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:30:17,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3102 states. [2021-06-05 22:30:17,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3102 to 1434. [2021-06-05 22:30:17,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1434 states, 1433 states have (on average 4.174459176552687) internal successors, (5982), 1433 states have internal predecessors, (5982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:17,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1434 states to 1434 states and 5982 transitions. [2021-06-05 22:30:17,333 INFO L78 Accepts]: Start accepts. Automaton has 1434 states and 5982 transitions. Word has length 28 [2021-06-05 22:30:17,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:17,333 INFO L482 AbstractCegarLoop]: Abstraction has 1434 states and 5982 transitions. [2021-06-05 22:30:17,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:17,333 INFO L276 IsEmpty]: Start isEmpty. Operand 1434 states and 5982 transitions. [2021-06-05 22:30:17,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:30:17,335 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:17,335 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:17,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-06-05 22:30:17,536 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:17,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:17,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1964500729, now seen corresponding path program 22 times [2021-06-05 22:30:17,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:17,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523565536] [2021-06-05 22:30:17,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:17,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:17,563 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:17,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:17,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523565536] [2021-06-05 22:30:17,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523565536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:17,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252978433] [2021-06-05 22:30:17,563 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:17,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:30:17,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:17,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:30:17,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:17,668 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:17,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252978433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:17,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:17,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 22:30:17,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928884322] [2021-06-05 22:30:17,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:30:17,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:17,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:30:17,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:30:17,669 INFO L87 Difference]: Start difference. First operand 1434 states and 5982 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:17,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:17,865 INFO L93 Difference]: Finished difference Result 3236 states and 12555 transitions. [2021-06-05 22:30:17,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:30:17,866 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 22:30:17,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:17,871 INFO L225 Difference]: With dead ends: 3236 [2021-06-05 22:30:17,871 INFO L226 Difference]: Without dead ends: 2982 [2021-06-05 22:30:17,871 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 107.4ms TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:30:17,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2982 states. [2021-06-05 22:30:17,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2982 to 1795. [2021-06-05 22:30:17,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1795 states, 1794 states have (on average 4.193979933110368) internal successors, (7524), 1794 states have internal predecessors, (7524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:17,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1795 states to 1795 states and 7524 transitions. [2021-06-05 22:30:17,901 INFO L78 Accepts]: Start accepts. Automaton has 1795 states and 7524 transitions. Word has length 28 [2021-06-05 22:30:17,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:17,901 INFO L482 AbstractCegarLoop]: Abstraction has 1795 states and 7524 transitions. [2021-06-05 22:30:17,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:17,901 INFO L276 IsEmpty]: Start isEmpty. Operand 1795 states and 7524 transitions. [2021-06-05 22:30:17,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:30:17,903 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:17,903 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:18,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-05 22:30:18,104 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:18,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:18,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1098043517, now seen corresponding path program 23 times [2021-06-05 22:30:18,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:18,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450331543] [2021-06-05 22:30:18,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:18,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:18,122 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:18,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:18,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450331543] [2021-06-05 22:30:18,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450331543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:18,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035904947] [2021-06-05 22:30:18,122 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:18,156 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:30:18,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:18,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:30:18,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:18,215 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:18,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035904947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:18,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:18,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 22:30:18,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693799253] [2021-06-05 22:30:18,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:30:18,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:18,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:30:18,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:30:18,216 INFO L87 Difference]: Start difference. First operand 1795 states and 7524 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:18,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:18,420 INFO L93 Difference]: Finished difference Result 3187 states and 12461 transitions. [2021-06-05 22:30:18,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:30:18,421 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 22:30:18,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:18,426 INFO L225 Difference]: With dead ends: 3187 [2021-06-05 22:30:18,426 INFO L226 Difference]: Without dead ends: 3089 [2021-06-05 22:30:18,426 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 109.6ms TimeCoverageRelationStatistics Valid=135, Invalid=285, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:30:18,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3089 states. [2021-06-05 22:30:18,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3089 to 1790. [2021-06-05 22:30:18,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1790 states, 1789 states have (on average 4.18278367803242) internal successors, (7483), 1789 states have internal predecessors, (7483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:18,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1790 states to 1790 states and 7483 transitions. [2021-06-05 22:30:18,478 INFO L78 Accepts]: Start accepts. Automaton has 1790 states and 7483 transitions. Word has length 28 [2021-06-05 22:30:18,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:18,479 INFO L482 AbstractCegarLoop]: Abstraction has 1790 states and 7483 transitions. [2021-06-05 22:30:18,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:18,479 INFO L276 IsEmpty]: Start isEmpty. Operand 1790 states and 7483 transitions. [2021-06-05 22:30:18,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:30:18,482 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:18,482 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:18,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-05 22:30:18,683 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:18,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:18,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1929816143, now seen corresponding path program 24 times [2021-06-05 22:30:18,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:18,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000518575] [2021-06-05 22:30:18,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:18,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:18,700 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:18,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:18,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000518575] [2021-06-05 22:30:18,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000518575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:18,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225526210] [2021-06-05 22:30:18,701 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:18,736 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:30:18,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:18,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:30:18,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:18,791 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:18,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225526210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:18,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:18,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 22:30:18,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950440807] [2021-06-05 22:30:18,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:30:18,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:18,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:30:18,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:30:18,792 INFO L87 Difference]: Start difference. First operand 1790 states and 7483 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:18,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:18,947 INFO L93 Difference]: Finished difference Result 3507 states and 13666 transitions. [2021-06-05 22:30:18,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:30:18,948 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 22:30:18,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:18,953 INFO L225 Difference]: With dead ends: 3507 [2021-06-05 22:30:18,953 INFO L226 Difference]: Without dead ends: 3255 [2021-06-05 22:30:18,953 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 64.8ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:30:18,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3255 states. [2021-06-05 22:30:18,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3255 to 2159. [2021-06-05 22:30:18,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2159 states, 2158 states have (on average 4.244670991658944) internal successors, (9160), 2158 states have internal predecessors, (9160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:18,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2159 states to 2159 states and 9160 transitions. [2021-06-05 22:30:18,990 INFO L78 Accepts]: Start accepts. Automaton has 2159 states and 9160 transitions. Word has length 28 [2021-06-05 22:30:18,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:18,990 INFO L482 AbstractCegarLoop]: Abstraction has 2159 states and 9160 transitions. [2021-06-05 22:30:18,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:18,990 INFO L276 IsEmpty]: Start isEmpty. Operand 2159 states and 9160 transitions. [2021-06-05 22:30:18,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:30:18,993 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:18,993 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:19,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-05 22:30:19,194 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:19,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:19,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1419687985, now seen corresponding path program 25 times [2021-06-05 22:30:19,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:19,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682344444] [2021-06-05 22:30:19,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:19,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:19,211 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:19,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:19,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682344444] [2021-06-05 22:30:19,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682344444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:19,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603600917] [2021-06-05 22:30:19,211 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:19,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:19,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:30:19,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:19,310 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:19,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603600917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:19,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:19,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 22:30:19,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645326508] [2021-06-05 22:30:19,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:30:19,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:19,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:30:19,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:30:19,311 INFO L87 Difference]: Start difference. First operand 2159 states and 9160 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:19,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:19,474 INFO L93 Difference]: Finished difference Result 3239 states and 13025 transitions. [2021-06-05 22:30:19,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:30:19,474 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 22:30:19,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:19,480 INFO L225 Difference]: With dead ends: 3239 [2021-06-05 22:30:19,480 INFO L226 Difference]: Without dead ends: 3150 [2021-06-05 22:30:19,480 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 85.8ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:30:19,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3150 states. [2021-06-05 22:30:19,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3150 to 2206. [2021-06-05 22:30:19,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2206 states, 2205 states have (on average 4.284353741496599) internal successors, (9447), 2205 states have internal predecessors, (9447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:19,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2206 states to 2206 states and 9447 transitions. [2021-06-05 22:30:19,515 INFO L78 Accepts]: Start accepts. Automaton has 2206 states and 9447 transitions. Word has length 28 [2021-06-05 22:30:19,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:19,516 INFO L482 AbstractCegarLoop]: Abstraction has 2206 states and 9447 transitions. [2021-06-05 22:30:19,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:19,516 INFO L276 IsEmpty]: Start isEmpty. Operand 2206 states and 9447 transitions. [2021-06-05 22:30:19,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:30:19,519 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:19,519 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:19,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:19,719 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:19,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:19,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1022624813, now seen corresponding path program 26 times [2021-06-05 22:30:19,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:19,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483807653] [2021-06-05 22:30:19,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:19,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:19,744 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:19,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:19,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483807653] [2021-06-05 22:30:19,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483807653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:19,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046827584] [2021-06-05 22:30:19,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:19,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:30:19,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:19,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:30:19,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:19,860 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:19,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046827584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:19,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:19,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 22:30:19,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702073792] [2021-06-05 22:30:19,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:30:19,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:19,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:30:19,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:30:19,862 INFO L87 Difference]: Start difference. First operand 2206 states and 9447 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:20,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:20,040 INFO L93 Difference]: Finished difference Result 5842 states and 23522 transitions. [2021-06-05 22:30:20,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:30:20,040 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 22:30:20,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:20,080 INFO L225 Difference]: With dead ends: 5842 [2021-06-05 22:30:20,080 INFO L226 Difference]: Without dead ends: 5604 [2021-06-05 22:30:20,080 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 91.3ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:30:20,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5604 states. [2021-06-05 22:30:20,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5604 to 3077. [2021-06-05 22:30:20,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3077 states, 3076 states have (on average 4.447009102730819) internal successors, (13679), 3076 states have internal predecessors, (13679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:20,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3077 states to 3077 states and 13679 transitions. [2021-06-05 22:30:20,143 INFO L78 Accepts]: Start accepts. Automaton has 3077 states and 13679 transitions. Word has length 28 [2021-06-05 22:30:20,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:20,143 INFO L482 AbstractCegarLoop]: Abstraction has 3077 states and 13679 transitions. [2021-06-05 22:30:20,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:20,143 INFO L276 IsEmpty]: Start isEmpty. Operand 3077 states and 13679 transitions. [2021-06-05 22:30:20,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:30:20,148 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:20,148 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:20,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:20,348 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:20,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:20,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1332519461, now seen corresponding path program 27 times [2021-06-05 22:30:20,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:20,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085992795] [2021-06-05 22:30:20,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:20,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:20,372 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:30:20,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:20,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085992795] [2021-06-05 22:30:20,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085992795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:20,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874948659] [2021-06-05 22:30:20,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:20,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:30:20,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:20,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:30:20,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:20,474 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:20,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874948659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:20,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:20,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 22:30:20,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956759917] [2021-06-05 22:30:20,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:30:20,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:20,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:30:20,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:30:20,475 INFO L87 Difference]: Start difference. First operand 3077 states and 13679 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:20,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:20,707 INFO L93 Difference]: Finished difference Result 5963 states and 23745 transitions. [2021-06-05 22:30:20,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:30:20,707 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 22:30:20,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:20,717 INFO L225 Difference]: With dead ends: 5963 [2021-06-05 22:30:20,717 INFO L226 Difference]: Without dead ends: 5804 [2021-06-05 22:30:20,717 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 134.5ms TimeCoverageRelationStatistics Valid=165, Invalid=297, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:30:20,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5804 states. [2021-06-05 22:30:20,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5804 to 2984. [2021-06-05 22:30:20,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2984 states, 2983 states have (on average 4.44217230975528) internal successors, (13251), 2983 states have internal predecessors, (13251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:20,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2984 states to 2984 states and 13251 transitions. [2021-06-05 22:30:20,781 INFO L78 Accepts]: Start accepts. Automaton has 2984 states and 13251 transitions. Word has length 28 [2021-06-05 22:30:20,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:20,781 INFO L482 AbstractCegarLoop]: Abstraction has 2984 states and 13251 transitions. [2021-06-05 22:30:20,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:20,781 INFO L276 IsEmpty]: Start isEmpty. Operand 2984 states and 13251 transitions. [2021-06-05 22:30:20,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:30:20,785 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:20,785 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:20,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:20,986 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:20,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:20,986 INFO L82 PathProgramCache]: Analyzing trace with hash 80086205, now seen corresponding path program 28 times [2021-06-05 22:30:20,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:20,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940110666] [2021-06-05 22:30:20,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:20,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:21,007 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:21,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:21,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940110666] [2021-06-05 22:30:21,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940110666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:21,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340851165] [2021-06-05 22:30:21,007 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:21,041 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:30:21,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:21,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:30:21,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:21,110 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:21,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340851165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:21,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:21,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 22:30:21,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420166311] [2021-06-05 22:30:21,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:30:21,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:21,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:30:21,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:30:21,111 INFO L87 Difference]: Start difference. First operand 2984 states and 13251 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:21,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:21,354 INFO L93 Difference]: Finished difference Result 5675 states and 22909 transitions. [2021-06-05 22:30:21,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:30:21,354 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 22:30:21,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:21,385 INFO L225 Difference]: With dead ends: 5675 [2021-06-05 22:30:21,385 INFO L226 Difference]: Without dead ends: 5594 [2021-06-05 22:30:21,385 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 141.4ms TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:30:21,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5594 states. [2021-06-05 22:30:21,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5594 to 3213. [2021-06-05 22:30:21,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3213 states, 3212 states have (on average 4.452988792029888) internal successors, (14303), 3212 states have internal predecessors, (14303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:21,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3213 states to 3213 states and 14303 transitions. [2021-06-05 22:30:21,448 INFO L78 Accepts]: Start accepts. Automaton has 3213 states and 14303 transitions. Word has length 28 [2021-06-05 22:30:21,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:21,448 INFO L482 AbstractCegarLoop]: Abstraction has 3213 states and 14303 transitions. [2021-06-05 22:30:21,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:21,448 INFO L276 IsEmpty]: Start isEmpty. Operand 3213 states and 14303 transitions. [2021-06-05 22:30:21,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:30:21,453 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:21,453 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:21,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:21,653 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:21,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:21,654 INFO L82 PathProgramCache]: Analyzing trace with hash 420207487, now seen corresponding path program 29 times [2021-06-05 22:30:21,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:21,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491601794] [2021-06-05 22:30:21,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:21,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:21,675 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:21,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:21,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491601794] [2021-06-05 22:30:21,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491601794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:21,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661744442] [2021-06-05 22:30:21,675 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:21,716 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:30:21,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:21,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:30:21,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:21,770 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:21,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661744442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:21,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:21,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 22:30:21,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444196052] [2021-06-05 22:30:21,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:30:21,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:21,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:30:21,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:30:21,771 INFO L87 Difference]: Start difference. First operand 3213 states and 14303 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:21,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:21,991 INFO L93 Difference]: Finished difference Result 5452 states and 22207 transitions. [2021-06-05 22:30:21,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:30:21,991 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 22:30:21,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:22,001 INFO L225 Difference]: With dead ends: 5452 [2021-06-05 22:30:22,001 INFO L226 Difference]: Without dead ends: 5364 [2021-06-05 22:30:22,001 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 103.2ms TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:30:22,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5364 states. [2021-06-05 22:30:22,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5364 to 3341. [2021-06-05 22:30:22,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3341 states, 3340 states have (on average 4.440718562874252) internal successors, (14832), 3340 states have internal predecessors, (14832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:22,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3341 states to 3341 states and 14832 transitions. [2021-06-05 22:30:22,073 INFO L78 Accepts]: Start accepts. Automaton has 3341 states and 14832 transitions. Word has length 28 [2021-06-05 22:30:22,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:22,073 INFO L482 AbstractCegarLoop]: Abstraction has 3341 states and 14832 transitions. [2021-06-05 22:30:22,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:22,073 INFO L276 IsEmpty]: Start isEmpty. Operand 3341 states and 14832 transitions. [2021-06-05 22:30:22,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:30:22,080 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:22,080 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:22,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:22,301 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:22,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:22,301 INFO L82 PathProgramCache]: Analyzing trace with hash -86414081, now seen corresponding path program 30 times [2021-06-05 22:30:22,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:22,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085355342] [2021-06-05 22:30:22,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:22,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:22,321 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:22,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:22,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085355342] [2021-06-05 22:30:22,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085355342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:22,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052365922] [2021-06-05 22:30:22,321 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:22,357 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:30:22,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:22,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:30:22,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:22,409 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:22,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052365922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:22,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:22,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 22:30:22,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527958899] [2021-06-05 22:30:22,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:30:22,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:22,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:30:22,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:30:22,410 INFO L87 Difference]: Start difference. First operand 3341 states and 14832 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:22,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:22,567 INFO L93 Difference]: Finished difference Result 4165 states and 17900 transitions. [2021-06-05 22:30:22,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:30:22,567 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 22:30:22,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:22,576 INFO L225 Difference]: With dead ends: 4165 [2021-06-05 22:30:22,576 INFO L226 Difference]: Without dead ends: 4165 [2021-06-05 22:30:22,576 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 72.8ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:30:22,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4165 states. [2021-06-05 22:30:22,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4165 to 3293. [2021-06-05 22:30:22,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3293 states, 3292 states have (on average 4.427703523693803) internal successors, (14576), 3292 states have internal predecessors, (14576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:22,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3293 states to 3293 states and 14576 transitions. [2021-06-05 22:30:22,647 INFO L78 Accepts]: Start accepts. Automaton has 3293 states and 14576 transitions. Word has length 28 [2021-06-05 22:30:22,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:22,648 INFO L482 AbstractCegarLoop]: Abstraction has 3293 states and 14576 transitions. [2021-06-05 22:30:22,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:22,648 INFO L276 IsEmpty]: Start isEmpty. Operand 3293 states and 14576 transitions. [2021-06-05 22:30:22,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:30:22,653 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:22,653 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:22,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:22,853 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:22,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:22,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1040039817, now seen corresponding path program 31 times [2021-06-05 22:30:22,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:22,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756730780] [2021-06-05 22:30:22,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:22,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:22,875 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:22,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:22,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756730780] [2021-06-05 22:30:22,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756730780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:22,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131964691] [2021-06-05 22:30:22,875 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:22,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:22,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:30:22,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:22,963 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:22,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131964691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:22,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:22,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 22:30:22,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700537136] [2021-06-05 22:30:22,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:30:22,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:22,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:30:22,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:30:22,963 INFO L87 Difference]: Start difference. First operand 3293 states and 14576 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:23,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:23,198 INFO L93 Difference]: Finished difference Result 6120 states and 24890 transitions. [2021-06-05 22:30:23,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:30:23,198 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 22:30:23,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:23,209 INFO L225 Difference]: With dead ends: 6120 [2021-06-05 22:30:23,209 INFO L226 Difference]: Without dead ends: 6031 [2021-06-05 22:30:23,209 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 100.0ms TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:30:23,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6031 states. [2021-06-05 22:30:23,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6031 to 3429. [2021-06-05 22:30:23,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3429 states, 3428 states have (on average 4.4518669778296385) internal successors, (15261), 3428 states have internal predecessors, (15261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:23,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3429 states to 3429 states and 15261 transitions. [2021-06-05 22:30:23,280 INFO L78 Accepts]: Start accepts. Automaton has 3429 states and 15261 transitions. Word has length 28 [2021-06-05 22:30:23,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:23,280 INFO L482 AbstractCegarLoop]: Abstraction has 3429 states and 15261 transitions. [2021-06-05 22:30:23,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:23,280 INFO L276 IsEmpty]: Start isEmpty. Operand 3429 states and 15261 transitions. [2021-06-05 22:30:23,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:30:23,286 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:23,286 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:23,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:23,501 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:23,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:23,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1402272981, now seen corresponding path program 32 times [2021-06-05 22:30:23,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:23,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684910662] [2021-06-05 22:30:23,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:23,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:23,522 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:23,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:23,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684910662] [2021-06-05 22:30:23,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684910662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:23,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652768808] [2021-06-05 22:30:23,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:23,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:30:23,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:23,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:30:23,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:23,610 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:23,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652768808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:23,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:23,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 22:30:23,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438293802] [2021-06-05 22:30:23,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:30:23,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:23,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:30:23,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:30:23,611 INFO L87 Difference]: Start difference. First operand 3429 states and 15261 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:23,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:23,785 INFO L93 Difference]: Finished difference Result 5654 states and 23169 transitions. [2021-06-05 22:30:23,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:30:23,786 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 22:30:23,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:23,795 INFO L225 Difference]: With dead ends: 5654 [2021-06-05 22:30:23,795 INFO L226 Difference]: Without dead ends: 5416 [2021-06-05 22:30:23,795 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 72.6ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:30:23,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5416 states. [2021-06-05 22:30:23,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5416 to 3560. [2021-06-05 22:30:23,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3560 states, 3559 states have (on average 4.421747681933128) internal successors, (15737), 3559 states have internal predecessors, (15737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:23,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3560 states to 3560 states and 15737 transitions. [2021-06-05 22:30:23,892 INFO L78 Accepts]: Start accepts. Automaton has 3560 states and 15737 transitions. Word has length 28 [2021-06-05 22:30:23,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:23,892 INFO L482 AbstractCegarLoop]: Abstraction has 3560 states and 15737 transitions. [2021-06-05 22:30:23,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:23,892 INFO L276 IsEmpty]: Start isEmpty. Operand 3560 states and 15737 transitions. [2021-06-05 22:30:23,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:30:23,898 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:23,898 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:24,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-06-05 22:30:24,098 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:24,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:24,098 INFO L82 PathProgramCache]: Analyzing trace with hash -952871293, now seen corresponding path program 33 times [2021-06-05 22:30:24,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:24,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348338335] [2021-06-05 22:30:24,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:24,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:24,119 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:24,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:24,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348338335] [2021-06-05 22:30:24,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348338335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:24,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872251954] [2021-06-05 22:30:24,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:24,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:30:24,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:24,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:30:24,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:24,207 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:24,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872251954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:24,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:24,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 22:30:24,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988372475] [2021-06-05 22:30:24,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:30:24,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:24,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:30:24,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:30:24,208 INFO L87 Difference]: Start difference. First operand 3560 states and 15737 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:24,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:24,426 INFO L93 Difference]: Finished difference Result 4955 states and 20688 transitions. [2021-06-05 22:30:24,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:30:24,426 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 22:30:24,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:24,435 INFO L225 Difference]: With dead ends: 4955 [2021-06-05 22:30:24,435 INFO L226 Difference]: Without dead ends: 4857 [2021-06-05 22:30:24,435 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 104.1ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:30:24,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4857 states. [2021-06-05 22:30:24,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4857 to 3479. [2021-06-05 22:30:24,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3479 states, 3478 states have (on average 4.4399079930994825) internal successors, (15442), 3478 states have internal predecessors, (15442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:24,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3479 states to 3479 states and 15442 transitions. [2021-06-05 22:30:24,493 INFO L78 Accepts]: Start accepts. Automaton has 3479 states and 15442 transitions. Word has length 28 [2021-06-05 22:30:24,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:24,493 INFO L482 AbstractCegarLoop]: Abstraction has 3479 states and 15442 transitions. [2021-06-05 22:30:24,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:24,493 INFO L276 IsEmpty]: Start isEmpty. Operand 3479 states and 15442 transitions. [2021-06-05 22:30:24,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:30:24,498 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:24,498 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:24,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-06-05 22:30:24,699 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:24,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:24,699 INFO L82 PathProgramCache]: Analyzing trace with hash -121098667, now seen corresponding path program 34 times [2021-06-05 22:30:24,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:24,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360984020] [2021-06-05 22:30:24,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:24,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:24,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:24,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:24,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360984020] [2021-06-05 22:30:24,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360984020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:24,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105461457] [2021-06-05 22:30:24,759 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:24,818 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:30:24,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:24,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:30:24,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:24,876 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:24,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105461457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:24,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:24,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 22:30:24,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816971116] [2021-06-05 22:30:24,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:30:24,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:24,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:30:24,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:30:24,877 INFO L87 Difference]: Start difference. First operand 3479 states and 15442 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:25,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:25,054 INFO L93 Difference]: Finished difference Result 5688 states and 23360 transitions. [2021-06-05 22:30:25,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:30:25,055 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 22:30:25,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:25,068 INFO L225 Difference]: With dead ends: 5688 [2021-06-05 22:30:25,068 INFO L226 Difference]: Without dead ends: 5374 [2021-06-05 22:30:25,068 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 84.4ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:30:25,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5374 states. [2021-06-05 22:30:25,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5374 to 3228. [2021-06-05 22:30:25,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3228 states, 3227 states have (on average 4.4465447784319805) internal successors, (14349), 3227 states have internal predecessors, (14349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:25,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3228 states to 3228 states and 14349 transitions. [2021-06-05 22:30:25,198 INFO L78 Accepts]: Start accepts. Automaton has 3228 states and 14349 transitions. Word has length 28 [2021-06-05 22:30:25,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:25,198 INFO L482 AbstractCegarLoop]: Abstraction has 3228 states and 14349 transitions. [2021-06-05 22:30:25,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:25,198 INFO L276 IsEmpty]: Start isEmpty. Operand 3228 states and 14349 transitions. [2021-06-05 22:30:25,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:30:25,205 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:25,205 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:25,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-06-05 22:30:25,428 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:25,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:25,429 INFO L82 PathProgramCache]: Analyzing trace with hash 73354585, now seen corresponding path program 35 times [2021-06-05 22:30:25,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:25,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35949721] [2021-06-05 22:30:25,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:25,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:25,454 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:25,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:25,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35949721] [2021-06-05 22:30:25,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35949721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:25,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588166177] [2021-06-05 22:30:25,455 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:25,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:30:25,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:25,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:30:25,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:25,551 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:25,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588166177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:25,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:25,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 22:30:25,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266468891] [2021-06-05 22:30:25,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 22:30:25,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:25,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 22:30:25,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:30:25,552 INFO L87 Difference]: Start difference. First operand 3228 states and 14349 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:25,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:25,688 INFO L93 Difference]: Finished difference Result 3905 states and 17063 transitions. [2021-06-05 22:30:25,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 22:30:25,688 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 22:30:25,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:25,697 INFO L225 Difference]: With dead ends: 3905 [2021-06-05 22:30:25,697 INFO L226 Difference]: Without dead ends: 3862 [2021-06-05 22:30:25,697 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 67.5ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:30:25,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3862 states. [2021-06-05 22:30:25,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3862 to 3217. [2021-06-05 22:30:25,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3217 states, 3216 states have (on average 4.453980099502488) internal successors, (14324), 3216 states have internal predecessors, (14324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:25,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3217 states to 3217 states and 14324 transitions. [2021-06-05 22:30:25,752 INFO L78 Accepts]: Start accepts. Automaton has 3217 states and 14324 transitions. Word has length 28 [2021-06-05 22:30:25,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:25,752 INFO L482 AbstractCegarLoop]: Abstraction has 3217 states and 14324 transitions. [2021-06-05 22:30:25,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:25,752 INFO L276 IsEmpty]: Start isEmpty. Operand 3217 states and 14324 transitions. [2021-06-05 22:30:25,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:30:25,757 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:25,757 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:25,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:25,958 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:25,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:25,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1068507869, now seen corresponding path program 36 times [2021-06-05 22:30:25,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:25,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855325175] [2021-06-05 22:30:25,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:25,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:25,979 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:25,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:25,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855325175] [2021-06-05 22:30:25,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855325175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:25,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155565805] [2021-06-05 22:30:25,979 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:26,014 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:30:26,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:26,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:30:26,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:26,061 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:26,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155565805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:26,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:26,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 22:30:26,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408406893] [2021-06-05 22:30:26,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 22:30:26,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:26,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 22:30:26,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:30:26,062 INFO L87 Difference]: Start difference. First operand 3217 states and 14324 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:26,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:26,144 INFO L93 Difference]: Finished difference Result 4261 states and 18540 transitions. [2021-06-05 22:30:26,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 22:30:26,144 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 22:30:26,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:26,152 INFO L225 Difference]: With dead ends: 4261 [2021-06-05 22:30:26,152 INFO L226 Difference]: Without dead ends: 4261 [2021-06-05 22:30:26,152 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 43.9ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:30:26,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4261 states. [2021-06-05 22:30:26,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4261 to 3247. [2021-06-05 22:30:26,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3247 states, 3246 states have (on average 4.457486136783734) internal successors, (14469), 3246 states have internal predecessors, (14469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:26,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3247 states to 3247 states and 14469 transitions. [2021-06-05 22:30:26,203 INFO L78 Accepts]: Start accepts. Automaton has 3247 states and 14469 transitions. Word has length 28 [2021-06-05 22:30:26,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:26,203 INFO L482 AbstractCegarLoop]: Abstraction has 3247 states and 14469 transitions. [2021-06-05 22:30:26,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:26,203 INFO L276 IsEmpty]: Start isEmpty. Operand 3247 states and 14469 transitions. [2021-06-05 22:30:26,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:30:26,208 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:26,208 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:26,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2021-06-05 22:30:26,410 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:26,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:26,411 INFO L82 PathProgramCache]: Analyzing trace with hash 32724757, now seen corresponding path program 37 times [2021-06-05 22:30:26,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:26,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034912712] [2021-06-05 22:30:26,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:26,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:26,440 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:26,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:26,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034912712] [2021-06-05 22:30:26,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034912712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:26,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111486306] [2021-06-05 22:30:26,441 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:26,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:26,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:30:26,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:26,536 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:26,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111486306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:26,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:26,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 22:30:26,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688935135] [2021-06-05 22:30:26,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:30:26,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:26,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:30:26,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:30:26,537 INFO L87 Difference]: Start difference. First operand 3247 states and 14469 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:26,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:26,792 INFO L93 Difference]: Finished difference Result 5371 states and 22050 transitions. [2021-06-05 22:30:26,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:30:26,792 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 22:30:26,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:26,802 INFO L225 Difference]: With dead ends: 5371 [2021-06-05 22:30:26,802 INFO L226 Difference]: Without dead ends: 5194 [2021-06-05 22:30:26,802 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 161.5ms TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:30:26,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5194 states. [2021-06-05 22:30:26,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5194 to 3332. [2021-06-05 22:30:26,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3332 states, 3331 states have (on average 4.473431401981387) internal successors, (14901), 3331 states have internal predecessors, (14901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:26,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3332 states to 3332 states and 14901 transitions. [2021-06-05 22:30:26,882 INFO L78 Accepts]: Start accepts. Automaton has 3332 states and 14901 transitions. Word has length 28 [2021-06-05 22:30:26,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:26,882 INFO L482 AbstractCegarLoop]: Abstraction has 3332 states and 14901 transitions. [2021-06-05 22:30:26,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:26,882 INFO L276 IsEmpty]: Start isEmpty. Operand 3332 states and 14901 transitions. [2021-06-05 22:30:26,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:30:26,887 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:26,887 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:27,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:27,088 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:27,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:27,088 INFO L82 PathProgramCache]: Analyzing trace with hash -473896811, now seen corresponding path program 38 times [2021-06-05 22:30:27,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:27,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946706105] [2021-06-05 22:30:27,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:27,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:27,119 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:27,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:27,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946706105] [2021-06-05 22:30:27,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946706105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:27,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161811304] [2021-06-05 22:30:27,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:27,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:30:27,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:27,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:30:27,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:27,227 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:27,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161811304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:27,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:27,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 22:30:27,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157914263] [2021-06-05 22:30:27,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:30:27,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:27,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:30:27,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:30:27,228 INFO L87 Difference]: Start difference. First operand 3332 states and 14901 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:27,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:27,409 INFO L93 Difference]: Finished difference Result 4983 states and 20920 transitions. [2021-06-05 22:30:27,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:30:27,409 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 22:30:27,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:27,417 INFO L225 Difference]: With dead ends: 4983 [2021-06-05 22:30:27,418 INFO L226 Difference]: Without dead ends: 4684 [2021-06-05 22:30:27,418 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 94.1ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:27,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4684 states. [2021-06-05 22:30:27,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4684 to 3540. [2021-06-05 22:30:27,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3540 states, 3539 states have (on average 4.495620231703871) internal successors, (15910), 3539 states have internal predecessors, (15910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:27,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3540 states to 3540 states and 15910 transitions. [2021-06-05 22:30:27,479 INFO L78 Accepts]: Start accepts. Automaton has 3540 states and 15910 transitions. Word has length 28 [2021-06-05 22:30:27,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:27,479 INFO L482 AbstractCegarLoop]: Abstraction has 3540 states and 15910 transitions. [2021-06-05 22:30:27,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:27,479 INFO L276 IsEmpty]: Start isEmpty. Operand 3540 states and 15910 transitions. [2021-06-05 22:30:27,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:30:27,485 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:27,485 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:27,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2021-06-05 22:30:27,686 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:27,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:27,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1340354023, now seen corresponding path program 39 times [2021-06-05 22:30:27,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:27,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998492190] [2021-06-05 22:30:27,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:27,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:27,705 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:27,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:27,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998492190] [2021-06-05 22:30:27,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998492190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:27,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135483703] [2021-06-05 22:30:27,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:27,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:30:27,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:27,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:30:27,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:27,802 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:27,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135483703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:27,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:27,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 22:30:27,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925105816] [2021-06-05 22:30:27,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:30:27,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:27,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:30:27,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:30:27,803 INFO L87 Difference]: Start difference. First operand 3540 states and 15910 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:28,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:28,008 INFO L93 Difference]: Finished difference Result 4609 states and 19684 transitions. [2021-06-05 22:30:28,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:30:28,009 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 22:30:28,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:28,018 INFO L225 Difference]: With dead ends: 4609 [2021-06-05 22:30:28,018 INFO L226 Difference]: Without dead ends: 4511 [2021-06-05 22:30:28,018 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 85.0ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:30:28,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4511 states. [2021-06-05 22:30:28,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4511 to 3315. [2021-06-05 22:30:28,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3315 states, 3314 states have (on average 4.492757996378998) internal successors, (14889), 3314 states have internal predecessors, (14889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:28,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3315 states to 3315 states and 14889 transitions. [2021-06-05 22:30:28,081 INFO L78 Accepts]: Start accepts. Automaton has 3315 states and 14889 transitions. Word has length 28 [2021-06-05 22:30:28,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:28,081 INFO L482 AbstractCegarLoop]: Abstraction has 3315 states and 14889 transitions. [2021-06-05 22:30:28,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:28,081 INFO L276 IsEmpty]: Start isEmpty. Operand 3315 states and 14889 transitions. [2021-06-05 22:30:28,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:30:28,088 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:28,088 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:28,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:28,289 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:28,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:28,290 INFO L82 PathProgramCache]: Analyzing trace with hash -508581397, now seen corresponding path program 40 times [2021-06-05 22:30:28,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:28,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108978517] [2021-06-05 22:30:28,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:28,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:28,306 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:28,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:28,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108978517] [2021-06-05 22:30:28,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108978517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:28,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426425902] [2021-06-05 22:30:28,307 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:28,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:30:28,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:28,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:30:28,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:28,431 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:28,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426425902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:28,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:28,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 22:30:28,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015835708] [2021-06-05 22:30:28,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:30:28,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:28,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:30:28,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:30:28,432 INFO L87 Difference]: Start difference. First operand 3315 states and 14889 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:28,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:28,595 INFO L93 Difference]: Finished difference Result 6217 states and 25682 transitions. [2021-06-05 22:30:28,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:30:28,595 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 22:30:28,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:28,606 INFO L225 Difference]: With dead ends: 6217 [2021-06-05 22:30:28,607 INFO L226 Difference]: Without dead ends: 5965 [2021-06-05 22:30:28,607 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 107.4ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:30:28,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5965 states. [2021-06-05 22:30:28,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5965 to 3606. [2021-06-05 22:30:28,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3606 states, 3605 states have (on average 4.471844660194175) internal successors, (16121), 3605 states have internal predecessors, (16121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:28,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3606 states to 3606 states and 16121 transitions. [2021-06-05 22:30:28,679 INFO L78 Accepts]: Start accepts. Automaton has 3606 states and 16121 transitions. Word has length 28 [2021-06-05 22:30:28,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:28,679 INFO L482 AbstractCegarLoop]: Abstraction has 3606 states and 16121 transitions. [2021-06-05 22:30:28,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:28,679 INFO L276 IsEmpty]: Start isEmpty. Operand 3606 states and 16121 transitions. [2021-06-05 22:30:28,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:30:28,684 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:28,685 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:28,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:28,885 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:28,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:28,886 INFO L82 PathProgramCache]: Analyzing trace with hash 436881771, now seen corresponding path program 41 times [2021-06-05 22:30:28,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:28,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648773413] [2021-06-05 22:30:28,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:28,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:28,929 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:28,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:28,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648773413] [2021-06-05 22:30:28,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648773413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:28,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756569395] [2021-06-05 22:30:28,930 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:28,975 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:30:28,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:28,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:30:28,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:29,046 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:29,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756569395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:29,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:29,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 22:30:29,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515617810] [2021-06-05 22:30:29,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:30:29,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:29,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:30:29,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:30:29,046 INFO L87 Difference]: Start difference. First operand 3606 states and 16121 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:29,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:29,255 INFO L93 Difference]: Finished difference Result 5105 states and 21497 transitions. [2021-06-05 22:30:29,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:30:29,255 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 22:30:29,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:29,266 INFO L225 Difference]: With dead ends: 5105 [2021-06-05 22:30:29,266 INFO L226 Difference]: Without dead ends: 5016 [2021-06-05 22:30:29,266 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 122.4ms TimeCoverageRelationStatistics Valid=135, Invalid=285, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:30:29,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5016 states. [2021-06-05 22:30:29,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5016 to 3555. [2021-06-05 22:30:29,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3555 states, 3554 states have (on average 4.498030388294879) internal successors, (15986), 3554 states have internal predecessors, (15986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:29,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3555 states to 3555 states and 15986 transitions. [2021-06-05 22:30:29,331 INFO L78 Accepts]: Start accepts. Automaton has 3555 states and 15986 transitions. Word has length 28 [2021-06-05 22:30:29,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:29,331 INFO L482 AbstractCegarLoop]: Abstraction has 3555 states and 15986 transitions. [2021-06-05 22:30:29,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:29,331 INFO L276 IsEmpty]: Start isEmpty. Operand 3555 states and 15986 transitions. [2021-06-05 22:30:29,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:30:29,336 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:29,336 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:29,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2021-06-05 22:30:29,538 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:29,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:29,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1415772727, now seen corresponding path program 42 times [2021-06-05 22:30:29,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:29,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645035365] [2021-06-05 22:30:29,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:29,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:29,616 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:29,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:29,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645035365] [2021-06-05 22:30:29,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645035365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:29,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147233035] [2021-06-05 22:30:29,617 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:29,663 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:30:29,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:29,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:30:29,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:29,811 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:29,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147233035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:29,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:29,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 22:30:29,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211812062] [2021-06-05 22:30:29,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:30:29,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:29,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:30:29,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:30:29,812 INFO L87 Difference]: Start difference. First operand 3555 states and 15986 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:29,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:29,991 INFO L93 Difference]: Finished difference Result 6625 states and 28035 transitions. [2021-06-05 22:30:29,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:30:29,991 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 22:30:29,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:30,004 INFO L225 Difference]: With dead ends: 6625 [2021-06-05 22:30:30,004 INFO L226 Difference]: Without dead ends: 6387 [2021-06-05 22:30:30,004 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 82.7ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:30:30,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6387 states. [2021-06-05 22:30:30,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6387 to 4277. [2021-06-05 22:30:30,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4277 states, 4276 states have (on average 4.543966323666979) internal successors, (19430), 4276 states have internal predecessors, (19430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:30,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4277 states to 4277 states and 19430 transitions. [2021-06-05 22:30:30,111 INFO L78 Accepts]: Start accepts. Automaton has 4277 states and 19430 transitions. Word has length 28 [2021-06-05 22:30:30,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:30,111 INFO L482 AbstractCegarLoop]: Abstraction has 4277 states and 19430 transitions. [2021-06-05 22:30:30,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:30,111 INFO L276 IsEmpty]: Start isEmpty. Operand 4277 states and 19430 transitions. [2021-06-05 22:30:30,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:30:30,118 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:30,118 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:30,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:30,319 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:30,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:30,320 INFO L82 PathProgramCache]: Analyzing trace with hash 524050295, now seen corresponding path program 43 times [2021-06-05 22:30:30,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:30,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268082718] [2021-06-05 22:30:30,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:30,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:30,339 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:30:30,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:30,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268082718] [2021-06-05 22:30:30,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268082718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:30,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616361361] [2021-06-05 22:30:30,339 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:30,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:30,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:30:30,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:30,431 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:30,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616361361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:30,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:30,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 22:30:30,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569501966] [2021-06-05 22:30:30,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:30:30,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:30,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:30:30,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:30:30,432 INFO L87 Difference]: Start difference. First operand 4277 states and 19430 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:30,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:30,792 INFO L93 Difference]: Finished difference Result 6394 states and 27162 transitions. [2021-06-05 22:30:30,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:30:30,792 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 22:30:30,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:30,811 INFO L225 Difference]: With dead ends: 6394 [2021-06-05 22:30:30,811 INFO L226 Difference]: Without dead ends: 6243 [2021-06-05 22:30:30,812 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 115.3ms TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:30:30,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6243 states. [2021-06-05 22:30:30,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6243 to 3807. [2021-06-05 22:30:30,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3807 states, 3806 states have (on average 4.512348922753547) internal successors, (17174), 3806 states have internal predecessors, (17174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:30,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3807 states to 3807 states and 17174 transitions. [2021-06-05 22:30:30,914 INFO L78 Accepts]: Start accepts. Automaton has 3807 states and 17174 transitions. Word has length 28 [2021-06-05 22:30:30,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:30,915 INFO L482 AbstractCegarLoop]: Abstraction has 3807 states and 17174 transitions. [2021-06-05 22:30:30,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:30,915 INFO L276 IsEmpty]: Start isEmpty. Operand 3807 states and 17174 transitions. [2021-06-05 22:30:30,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:30:30,922 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:30,922 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:31,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:31,145 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:31,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:31,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1936655961, now seen corresponding path program 44 times [2021-06-05 22:30:31,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:31,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703532143] [2021-06-05 22:30:31,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:31,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:31,196 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:31,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:31,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703532143] [2021-06-05 22:30:31,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703532143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:31,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991728125] [2021-06-05 22:30:31,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:31,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:30:31,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:31,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:30:31,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:31,293 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:31,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991728125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:31,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:31,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 22:30:31,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048148037] [2021-06-05 22:30:31,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 22:30:31,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:31,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 22:30:31,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:30:31,294 INFO L87 Difference]: Start difference. First operand 3807 states and 17174 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:31,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:31,532 INFO L93 Difference]: Finished difference Result 5996 states and 25523 transitions. [2021-06-05 22:30:31,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:30:31,532 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 22:30:31,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:31,543 INFO L225 Difference]: With dead ends: 5996 [2021-06-05 22:30:31,544 INFO L226 Difference]: Without dead ends: 5915 [2021-06-05 22:30:31,544 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 114.3ms TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:30:31,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5915 states. [2021-06-05 22:30:31,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5915 to 3582. [2021-06-05 22:30:31,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3582 states, 3581 states have (on average 4.499301870985758) internal successors, (16112), 3581 states have internal predecessors, (16112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:31,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3582 states to 3582 states and 16112 transitions. [2021-06-05 22:30:31,649 INFO L78 Accepts]: Start accepts. Automaton has 3582 states and 16112 transitions. Word has length 28 [2021-06-05 22:30:31,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:31,649 INFO L482 AbstractCegarLoop]: Abstraction has 3582 states and 16112 transitions. [2021-06-05 22:30:31,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:31,650 INFO L276 IsEmpty]: Start isEmpty. Operand 3582 states and 16112 transitions. [2021-06-05 22:30:31,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:30:31,656 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:31,656 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:31,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-05 22:30:31,856 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:31,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:31,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1708748389, now seen corresponding path program 45 times [2021-06-05 22:30:31,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:31,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021630241] [2021-06-05 22:30:31,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:31,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:31,879 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:31,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:31,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021630241] [2021-06-05 22:30:31,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021630241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:31,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153248665] [2021-06-05 22:30:31,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:31,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:30:31,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:31,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:30:31,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:31,977 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:31,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153248665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:31,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:31,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 22:30:31,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742741484] [2021-06-05 22:30:31,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:30:31,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:31,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:30:31,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:30:31,978 INFO L87 Difference]: Start difference. First operand 3582 states and 16112 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:32,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:32,226 INFO L93 Difference]: Finished difference Result 6117 states and 25799 transitions. [2021-06-05 22:30:32,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 22:30:32,227 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 22:30:32,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:32,240 INFO L225 Difference]: With dead ends: 6117 [2021-06-05 22:30:32,240 INFO L226 Difference]: Without dead ends: 6028 [2021-06-05 22:30:32,240 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 124.3ms TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:30:32,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6028 states. [2021-06-05 22:30:32,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6028 to 3578. [2021-06-05 22:30:32,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3578 states, 3577 states have (on average 4.48616158792284) internal successors, (16047), 3577 states have internal predecessors, (16047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:32,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3578 states to 3578 states and 16047 transitions. [2021-06-05 22:30:32,315 INFO L78 Accepts]: Start accepts. Automaton has 3578 states and 16047 transitions. Word has length 28 [2021-06-05 22:30:32,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:32,315 INFO L482 AbstractCegarLoop]: Abstraction has 3578 states and 16047 transitions. [2021-06-05 22:30:32,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:32,315 INFO L276 IsEmpty]: Start isEmpty. Operand 3578 states and 16047 transitions. [2021-06-05 22:30:32,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:30:32,321 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:32,321 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:32,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-05 22:30:32,521 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:32,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:32,522 INFO L82 PathProgramCache]: Analyzing trace with hash 733564409, now seen corresponding path program 46 times [2021-06-05 22:30:32,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:32,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113250537] [2021-06-05 22:30:32,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:32,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:32,541 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:32,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:32,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113250537] [2021-06-05 22:30:32,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113250537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:32,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276050314] [2021-06-05 22:30:32,542 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:32,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:30:32,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:32,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:30:32,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:32,632 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:32,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276050314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:32,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:32,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 22:30:32,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120675828] [2021-06-05 22:30:32,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:30:32,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:32,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:30:32,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:30:32,633 INFO L87 Difference]: Start difference. First operand 3578 states and 16047 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:32,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:32,809 INFO L93 Difference]: Finished difference Result 7695 states and 32562 transitions. [2021-06-05 22:30:32,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 22:30:32,809 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 22:30:32,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:32,825 INFO L225 Difference]: With dead ends: 7695 [2021-06-05 22:30:32,826 INFO L226 Difference]: Without dead ends: 7457 [2021-06-05 22:30:32,826 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 72.7ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-06-05 22:30:32,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7457 states. [2021-06-05 22:30:32,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7457 to 3898. [2021-06-05 22:30:32,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3898 states, 3897 states have (on average 4.497818835001283) internal successors, (17528), 3897 states have internal predecessors, (17528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:32,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3898 states to 3898 states and 17528 transitions. [2021-06-05 22:30:32,917 INFO L78 Accepts]: Start accepts. Automaton has 3898 states and 17528 transitions. Word has length 28 [2021-06-05 22:30:32,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:32,917 INFO L482 AbstractCegarLoop]: Abstraction has 3898 states and 17528 transitions. [2021-06-05 22:30:32,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:32,917 INFO L276 IsEmpty]: Start isEmpty. Operand 3898 states and 17528 transitions. [2021-06-05 22:30:32,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:30:32,924 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:32,924 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:33,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable180 [2021-06-05 22:30:33,124 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:33,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:33,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1621579865, now seen corresponding path program 47 times [2021-06-05 22:30:33,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:33,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240428730] [2021-06-05 22:30:33,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:33,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:33,145 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:33,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:33,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240428730] [2021-06-05 22:30:33,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240428730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:33,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655077719] [2021-06-05 22:30:33,146 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:33,180 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:30:33,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:33,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:30:33,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:33,234 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:33,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655077719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:33,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:33,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 22:30:33,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733500630] [2021-06-05 22:30:33,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:30:33,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:33,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:30:33,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:30:33,234 INFO L87 Difference]: Start difference. First operand 3898 states and 17528 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:33,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:33,510 INFO L93 Difference]: Finished difference Result 7529 states and 31905 transitions. [2021-06-05 22:30:33,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:30:33,511 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 22:30:33,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:33,528 INFO L225 Difference]: With dead ends: 7529 [2021-06-05 22:30:33,529 INFO L226 Difference]: Without dead ends: 7378 [2021-06-05 22:30:33,529 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 103.1ms TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:30:33,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7378 states. [2021-06-05 22:30:33,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7378 to 3667. [2021-06-05 22:30:33,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3667 states, 3666 states have (on average 4.480087288597927) internal successors, (16424), 3666 states have internal predecessors, (16424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:33,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3667 states to 3667 states and 16424 transitions. [2021-06-05 22:30:33,621 INFO L78 Accepts]: Start accepts. Automaton has 3667 states and 16424 transitions. Word has length 28 [2021-06-05 22:30:33,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:33,621 INFO L482 AbstractCegarLoop]: Abstraction has 3667 states and 16424 transitions. [2021-06-05 22:30:33,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:33,621 INFO L276 IsEmpty]: Start isEmpty. Operand 3667 states and 16424 transitions. [2021-06-05 22:30:33,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:30:33,627 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:33,627 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:33,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:33,827 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:33,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:33,828 INFO L82 PathProgramCache]: Analyzing trace with hash -789807239, now seen corresponding path program 48 times [2021-06-05 22:30:33,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:33,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682089767] [2021-06-05 22:30:33,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:33,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:33,848 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:33,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:33,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682089767] [2021-06-05 22:30:33,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682089767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:33,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712885993] [2021-06-05 22:30:33,848 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:33,883 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:30:33,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:33,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:30:33,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:33,934 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:33,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712885993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:33,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:33,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 22:30:33,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242830390] [2021-06-05 22:30:33,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:30:33,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:33,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:30:33,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:30:33,935 INFO L87 Difference]: Start difference. First operand 3667 states and 16424 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:34,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:34,081 INFO L93 Difference]: Finished difference Result 5684 states and 23777 transitions. [2021-06-05 22:30:34,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 22:30:34,082 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 22:30:34,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:34,092 INFO L225 Difference]: With dead ends: 5684 [2021-06-05 22:30:34,092 INFO L226 Difference]: Without dead ends: 5684 [2021-06-05 22:30:34,092 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 74.1ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-06-05 22:30:34,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5684 states. [2021-06-05 22:30:34,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5684 to 3830. [2021-06-05 22:30:34,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3830 states, 3829 states have (on average 4.469051971794202) internal successors, (17112), 3829 states have internal predecessors, (17112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:34,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3830 states to 3830 states and 17112 transitions. [2021-06-05 22:30:34,156 INFO L78 Accepts]: Start accepts. Automaton has 3830 states and 17112 transitions. Word has length 28 [2021-06-05 22:30:34,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:34,156 INFO L482 AbstractCegarLoop]: Abstraction has 3830 states and 17112 transitions. [2021-06-05 22:30:34,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:34,156 INFO L276 IsEmpty]: Start isEmpty. Operand 3830 states and 17112 transitions. [2021-06-05 22:30:34,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:30:34,162 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:34,162 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:34,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-06-05 22:30:34,362 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:34,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:34,363 INFO L82 PathProgramCache]: Analyzing trace with hash -208974199, now seen corresponding path program 49 times [2021-06-05 22:30:34,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:34,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496612496] [2021-06-05 22:30:34,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:34,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:34,383 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:34,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:34,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496612496] [2021-06-05 22:30:34,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496612496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:34,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69418825] [2021-06-05 22:30:34,383 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:34,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:34,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:30:34,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:34,471 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:34,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69418825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:34,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:34,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 22:30:34,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684237188] [2021-06-05 22:30:34,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 22:30:34,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:34,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 22:30:34,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:30:34,472 INFO L87 Difference]: Start difference. First operand 3830 states and 17112 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:34,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:34,673 INFO L93 Difference]: Finished difference Result 5383 states and 22901 transitions. [2021-06-05 22:30:34,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 22:30:34,673 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 22:30:34,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:34,683 INFO L225 Difference]: With dead ends: 5383 [2021-06-05 22:30:34,683 INFO L226 Difference]: Without dead ends: 5301 [2021-06-05 22:30:34,684 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 93.9ms TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:30:34,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5301 states. [2021-06-05 22:30:34,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5301 to 3809. [2021-06-05 22:30:34,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3809 states, 3808 states have (on average 4.473214285714286) internal successors, (17034), 3808 states have internal predecessors, (17034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:34,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3809 states to 3809 states and 17034 transitions. [2021-06-05 22:30:34,748 INFO L78 Accepts]: Start accepts. Automaton has 3809 states and 17034 transitions. Word has length 28 [2021-06-05 22:30:34,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:34,749 INFO L482 AbstractCegarLoop]: Abstraction has 3809 states and 17034 transitions. [2021-06-05 22:30:34,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:34,749 INFO L276 IsEmpty]: Start isEmpty. Operand 3809 states and 17034 transitions. [2021-06-05 22:30:34,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:30:34,754 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:34,754 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:34,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:34,955 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:34,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:34,955 INFO L82 PathProgramCache]: Analyzing trace with hash 23729685, now seen corresponding path program 50 times [2021-06-05 22:30:34,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:34,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441847612] [2021-06-05 22:30:34,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:34,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:34,978 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:34,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:34,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441847612] [2021-06-05 22:30:34,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441847612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:34,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431455881] [2021-06-05 22:30:34,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:35,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:30:35,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:35,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:30:35,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:35,057 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:35,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431455881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:35,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:35,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 22:30:35,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737963782] [2021-06-05 22:30:35,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 22:30:35,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:35,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 22:30:35,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:30:35,058 INFO L87 Difference]: Start difference. First operand 3809 states and 17034 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:35,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:35,171 INFO L93 Difference]: Finished difference Result 4345 states and 19174 transitions. [2021-06-05 22:30:35,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:30:35,171 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 22:30:35,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:35,180 INFO L225 Difference]: With dead ends: 4345 [2021-06-05 22:30:35,180 INFO L226 Difference]: Without dead ends: 4282 [2021-06-05 22:30:35,181 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 52.1ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-05 22:30:35,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4282 states. [2021-06-05 22:30:35,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4282 to 3786. [2021-06-05 22:30:35,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3786 states, 3785 states have (on average 4.484808454425363) internal successors, (16975), 3785 states have internal predecessors, (16975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:35,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3786 states to 3786 states and 16975 transitions. [2021-06-05 22:30:35,235 INFO L78 Accepts]: Start accepts. Automaton has 3786 states and 16975 transitions. Word has length 28 [2021-06-05 22:30:35,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:35,235 INFO L482 AbstractCegarLoop]: Abstraction has 3786 states and 16975 transitions. [2021-06-05 22:30:35,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:35,235 INFO L276 IsEmpty]: Start isEmpty. Operand 3786 states and 16975 transitions. [2021-06-05 22:30:35,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:30:35,240 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:35,240 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:35,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:35,457 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:35,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:35,457 INFO L82 PathProgramCache]: Analyzing trace with hash 881575195, now seen corresponding path program 51 times [2021-06-05 22:30:35,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:35,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137797200] [2021-06-05 22:30:35,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:35,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:35,480 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:35,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:35,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137797200] [2021-06-05 22:30:35,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137797200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:35,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113261945] [2021-06-05 22:30:35,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:35,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:30:35,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:35,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:30:35,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:35,566 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:35,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113261945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:35,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:35,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 22:30:35,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509505886] [2021-06-05 22:30:35,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 22:30:35,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:35,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 22:30:35,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:30:35,567 INFO L87 Difference]: Start difference. First operand 3786 states and 16975 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:35,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:35,666 INFO L93 Difference]: Finished difference Result 4570 states and 20136 transitions. [2021-06-05 22:30:35,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 22:30:35,667 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 22:30:35,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:35,677 INFO L225 Difference]: With dead ends: 4570 [2021-06-05 22:30:35,677 INFO L226 Difference]: Without dead ends: 4570 [2021-06-05 22:30:35,677 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 46.8ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 22:30:35,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4570 states. [2021-06-05 22:30:35,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4570 to 3804. [2021-06-05 22:30:35,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3804 states, 3803 states have (on average 4.494083618196161) internal successors, (17091), 3803 states have internal predecessors, (17091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:35,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3804 states to 3804 states and 17091 transitions. [2021-06-05 22:30:35,737 INFO L78 Accepts]: Start accepts. Automaton has 3804 states and 17091 transitions. Word has length 28 [2021-06-05 22:30:35,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:35,737 INFO L482 AbstractCegarLoop]: Abstraction has 3804 states and 17091 transitions. [2021-06-05 22:30:35,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:35,738 INFO L276 IsEmpty]: Start isEmpty. Operand 3804 states and 17091 transitions. [2021-06-05 22:30:35,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:30:35,743 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:35,743 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:35,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:35,945 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:35,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:35,946 INFO L82 PathProgramCache]: Analyzing trace with hash 451443930, now seen corresponding path program 52 times [2021-06-05 22:30:35,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:35,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129996507] [2021-06-05 22:30:35,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:35,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:36,205 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:36,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:36,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129996507] [2021-06-05 22:30:36,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129996507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:36,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696548290] [2021-06-05 22:30:36,205 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:36,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:30:36,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:36,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:30:36,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:36,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 22:30:36,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:36,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:36,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:36,397 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 22:30:36,434 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:36,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696548290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:36,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:36,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:30:36,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838899999] [2021-06-05 22:30:36,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:30:36,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:36,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:30:36,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:30:36,435 INFO L87 Difference]: Start difference. First operand 3804 states and 17091 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:37,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:37,679 INFO L93 Difference]: Finished difference Result 5745 states and 25057 transitions. [2021-06-05 22:30:37,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 22:30:37,679 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:30:37,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:37,690 INFO L225 Difference]: With dead ends: 5745 [2021-06-05 22:30:37,691 INFO L226 Difference]: Without dead ends: 5664 [2021-06-05 22:30:37,691 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 822.7ms TimeCoverageRelationStatistics Valid=309, Invalid=1761, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 22:30:37,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5664 states. [2021-06-05 22:30:37,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5664 to 3903. [2021-06-05 22:30:37,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3903 states, 3902 states have (on average 4.478728856996412) internal successors, (17476), 3902 states have internal predecessors, (17476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:37,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3903 states to 3903 states and 17476 transitions. [2021-06-05 22:30:37,766 INFO L78 Accepts]: Start accepts. Automaton has 3903 states and 17476 transitions. Word has length 30 [2021-06-05 22:30:37,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:37,767 INFO L482 AbstractCegarLoop]: Abstraction has 3903 states and 17476 transitions. [2021-06-05 22:30:37,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:37,767 INFO L276 IsEmpty]: Start isEmpty. Operand 3903 states and 17476 transitions. [2021-06-05 22:30:37,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:30:37,773 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:37,773 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:37,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:37,976 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:37,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:37,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1756183324, now seen corresponding path program 1 times [2021-06-05 22:30:37,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:37,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360075506] [2021-06-05 22:30:37,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:37,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:38,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:38,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:38,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360075506] [2021-06-05 22:30:38,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360075506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:38,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158529604] [2021-06-05 22:30:38,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:38,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:38,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:30:38,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:38,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 22:30:38,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:38,366 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:38,366 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:38,366 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 22:30:38,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:38,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158529604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:38,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:38,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:30:38,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579668299] [2021-06-05 22:30:38,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:30:38,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:38,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:30:38,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:30:38,401 INFO L87 Difference]: Start difference. First operand 3903 states and 17476 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:39,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:39,541 INFO L93 Difference]: Finished difference Result 5395 states and 23651 transitions. [2021-06-05 22:30:39,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:30:39,542 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:30:39,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:39,553 INFO L225 Difference]: With dead ends: 5395 [2021-06-05 22:30:39,553 INFO L226 Difference]: Without dead ends: 5314 [2021-06-05 22:30:39,553 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 798.7ms TimeCoverageRelationStatistics Valid=294, Invalid=1512, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:30:39,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5314 states. [2021-06-05 22:30:39,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5314 to 3889. [2021-06-05 22:30:39,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3889 states, 3888 states have (on average 4.484310699588478) internal successors, (17435), 3888 states have internal predecessors, (17435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:39,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3889 states to 3889 states and 17435 transitions. [2021-06-05 22:30:39,631 INFO L78 Accepts]: Start accepts. Automaton has 3889 states and 17435 transitions. Word has length 30 [2021-06-05 22:30:39,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:39,632 INFO L482 AbstractCegarLoop]: Abstraction has 3889 states and 17435 transitions. [2021-06-05 22:30:39,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:39,632 INFO L276 IsEmpty]: Start isEmpty. Operand 3889 states and 17435 transitions. [2021-06-05 22:30:39,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:30:39,638 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:39,638 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:39,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:39,839 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:39,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:39,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1101128566, now seen corresponding path program 2 times [2021-06-05 22:30:39,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:39,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980683672] [2021-06-05 22:30:39,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:39,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:40,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:40,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:40,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980683672] [2021-06-05 22:30:40,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980683672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:40,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593317521] [2021-06-05 22:30:40,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:40,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:30:40,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:40,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:30:40,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:40,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:30:40,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:30:40,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 22:30:40,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:40,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:40,359 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:40,360 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:9 [2021-06-05 22:30:40,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:40,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593317521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:40,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:40,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 22:30:40,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311765332] [2021-06-05 22:30:40,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:30:40,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:40,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:30:40,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:30:40,421 INFO L87 Difference]: Start difference. First operand 3889 states and 17435 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:41,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:41,697 INFO L93 Difference]: Finished difference Result 5211 states and 22782 transitions. [2021-06-05 22:30:41,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:30:41,698 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:30:41,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:41,708 INFO L225 Difference]: With dead ends: 5211 [2021-06-05 22:30:41,708 INFO L226 Difference]: Without dead ends: 5130 [2021-06-05 22:30:41,708 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 970.5ms TimeCoverageRelationStatistics Valid=272, Invalid=1534, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:30:41,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5130 states. [2021-06-05 22:30:41,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5130 to 3899. [2021-06-05 22:30:41,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3899 states, 3898 states have (on average 4.482555156490508) internal successors, (17473), 3898 states have internal predecessors, (17473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:41,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3899 states to 3899 states and 17473 transitions. [2021-06-05 22:30:41,777 INFO L78 Accepts]: Start accepts. Automaton has 3899 states and 17473 transitions. Word has length 30 [2021-06-05 22:30:41,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:41,777 INFO L482 AbstractCegarLoop]: Abstraction has 3899 states and 17473 transitions. [2021-06-05 22:30:41,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:41,777 INFO L276 IsEmpty]: Start isEmpty. Operand 3899 states and 17473 transitions. [2021-06-05 22:30:41,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:30:41,783 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:41,783 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:41,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2021-06-05 22:30:41,983 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:41,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:41,983 INFO L82 PathProgramCache]: Analyzing trace with hash 594782300, now seen corresponding path program 3 times [2021-06-05 22:30:41,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:41,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477695792] [2021-06-05 22:30:41,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:41,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:42,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:42,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:42,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477695792] [2021-06-05 22:30:42,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477695792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:42,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430188599] [2021-06-05 22:30:42,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:42,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:30:42,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:42,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:30:42,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:42,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:30:42,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:30:42,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 22:30:42,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:42,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:42,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:42,425 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:9 [2021-06-05 22:30:42,480 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:42,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430188599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:42,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:42,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 22:30:42,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680098550] [2021-06-05 22:30:42,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:30:42,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:42,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:30:42,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:30:42,481 INFO L87 Difference]: Start difference. First operand 3899 states and 17473 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:43,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:43,807 INFO L93 Difference]: Finished difference Result 5249 states and 22919 transitions. [2021-06-05 22:30:43,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:30:43,808 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:30:43,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:43,818 INFO L225 Difference]: With dead ends: 5249 [2021-06-05 22:30:43,818 INFO L226 Difference]: Without dead ends: 5176 [2021-06-05 22:30:43,818 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 931.2ms TimeCoverageRelationStatistics Valid=281, Invalid=1611, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:30:43,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5176 states. [2021-06-05 22:30:43,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5176 to 3875. [2021-06-05 22:30:43,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3875 states, 3874 states have (on average 4.489416623644812) internal successors, (17392), 3874 states have internal predecessors, (17392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:43,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3875 states to 3875 states and 17392 transitions. [2021-06-05 22:30:43,882 INFO L78 Accepts]: Start accepts. Automaton has 3875 states and 17392 transitions. Word has length 30 [2021-06-05 22:30:43,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:43,883 INFO L482 AbstractCegarLoop]: Abstraction has 3875 states and 17392 transitions. [2021-06-05 22:30:43,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:43,883 INFO L276 IsEmpty]: Start isEmpty. Operand 3875 states and 17392 transitions. [2021-06-05 22:30:43,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:30:43,889 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:43,889 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:44,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-06-05 22:30:44,090 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:44,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:44,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1442945638, now seen corresponding path program 21 times [2021-06-05 22:30:44,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:44,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078703640] [2021-06-05 22:30:44,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:44,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:44,277 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:44,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:44,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078703640] [2021-06-05 22:30:44,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078703640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:44,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533916576] [2021-06-05 22:30:44,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:44,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:30:44,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:44,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:30:44,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:44,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:30:44,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:30:44,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:30:44,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:30:44,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 22:30:44,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:44,696 INFO L628 ElimStorePlain]: treesize reduction 3, result has 88.0 percent of original size [2021-06-05 22:30:44,697 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:44,697 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:11 [2021-06-05 22:30:44,740 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:44,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533916576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:44,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:44,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 24 [2021-06-05 22:30:44,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118591914] [2021-06-05 22:30:44,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:30:44,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:44,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:30:44,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:30:44,741 INFO L87 Difference]: Start difference. First operand 3875 states and 17392 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:46,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:46,251 INFO L93 Difference]: Finished difference Result 4957 states and 21263 transitions. [2021-06-05 22:30:46,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:30:46,251 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:30:46,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:46,262 INFO L225 Difference]: With dead ends: 4957 [2021-06-05 22:30:46,262 INFO L226 Difference]: Without dead ends: 4795 [2021-06-05 22:30:46,262 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 897.2ms TimeCoverageRelationStatistics Valid=186, Invalid=1374, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:30:46,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4795 states. [2021-06-05 22:30:46,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4795 to 3949. [2021-06-05 22:30:46,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3949 states, 3948 states have (on average 4.4693515704154) internal successors, (17645), 3948 states have internal predecessors, (17645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:46,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3949 states to 3949 states and 17645 transitions. [2021-06-05 22:30:46,329 INFO L78 Accepts]: Start accepts. Automaton has 3949 states and 17645 transitions. Word has length 30 [2021-06-05 22:30:46,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:46,329 INFO L482 AbstractCegarLoop]: Abstraction has 3949 states and 17645 transitions. [2021-06-05 22:30:46,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:46,329 INFO L276 IsEmpty]: Start isEmpty. Operand 3949 states and 17645 transitions. [2021-06-05 22:30:46,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:30:46,335 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:46,335 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:46,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-06-05 22:30:46,535 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:46,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:46,536 INFO L82 PathProgramCache]: Analyzing trace with hash 242481658, now seen corresponding path program 4 times [2021-06-05 22:30:46,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:46,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456833203] [2021-06-05 22:30:46,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:46,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:46,728 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:46,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:46,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456833203] [2021-06-05 22:30:46,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456833203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:46,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835490461] [2021-06-05 22:30:46,729 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:46,764 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:30:46,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:46,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:30:46,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:47,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:30:47,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:30:47,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:30:47,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 22:30:47,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:47,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:47,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:47,028 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:11 [2021-06-05 22:30:47,075 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:47,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835490461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:47,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:47,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-06-05 22:30:47,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616857523] [2021-06-05 22:30:47,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:30:47,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:47,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:30:47,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:30:47,076 INFO L87 Difference]: Start difference. First operand 3949 states and 17645 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:48,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:48,046 INFO L93 Difference]: Finished difference Result 4626 states and 20349 transitions. [2021-06-05 22:30:48,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:30:48,047 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:30:48,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:48,057 INFO L225 Difference]: With dead ends: 4626 [2021-06-05 22:30:48,058 INFO L226 Difference]: Without dead ends: 4553 [2021-06-05 22:30:48,058 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 651.2ms TimeCoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:30:48,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4553 states. [2021-06-05 22:30:48,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4553 to 3969. [2021-06-05 22:30:48,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3969 states, 3968 states have (on average 4.465977822580645) internal successors, (17721), 3968 states have internal predecessors, (17721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:48,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3969 states to 3969 states and 17721 transitions. [2021-06-05 22:30:48,121 INFO L78 Accepts]: Start accepts. Automaton has 3969 states and 17721 transitions. Word has length 30 [2021-06-05 22:30:48,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:48,121 INFO L482 AbstractCegarLoop]: Abstraction has 3969 states and 17721 transitions. [2021-06-05 22:30:48,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:48,122 INFO L276 IsEmpty]: Start isEmpty. Operand 3969 states and 17721 transitions. [2021-06-05 22:30:48,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:30:48,127 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:48,128 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:48,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:48,328 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:48,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:48,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1634626204, now seen corresponding path program 5 times [2021-06-05 22:30:48,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:48,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775904738] [2021-06-05 22:30:48,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:48,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:48,519 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:48,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:48,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775904738] [2021-06-05 22:30:48,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775904738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:48,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754473042] [2021-06-05 22:30:48,520 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:48,561 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:30:48,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:48,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:30:48,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:48,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:30:48,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:30:48,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:30:48,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 22:30:48,760 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:48,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:48,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:48,770 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:14 [2021-06-05 22:30:48,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:48,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754473042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:48,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:48,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-06-05 22:30:48,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244412183] [2021-06-05 22:30:48,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:30:48,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:48,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:30:48,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:30:48,836 INFO L87 Difference]: Start difference. First operand 3969 states and 17721 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:49,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:49,915 INFO L93 Difference]: Finished difference Result 4613 states and 20313 transitions. [2021-06-05 22:30:49,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:30:49,915 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:30:49,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:49,925 INFO L225 Difference]: With dead ends: 4613 [2021-06-05 22:30:49,925 INFO L226 Difference]: Without dead ends: 4532 [2021-06-05 22:30:49,925 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 625.9ms TimeCoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:30:49,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4532 states. [2021-06-05 22:30:49,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4532 to 3979. [2021-06-05 22:30:49,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3979 states, 3978 states have (on average 4.464303670186023) internal successors, (17759), 3978 states have internal predecessors, (17759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:50,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3979 states to 3979 states and 17759 transitions. [2021-06-05 22:30:50,002 INFO L78 Accepts]: Start accepts. Automaton has 3979 states and 17759 transitions. Word has length 30 [2021-06-05 22:30:50,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:50,002 INFO L482 AbstractCegarLoop]: Abstraction has 3979 states and 17759 transitions. [2021-06-05 22:30:50,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:50,003 INFO L276 IsEmpty]: Start isEmpty. Operand 3979 states and 17759 transitions. [2021-06-05 22:30:50,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:30:50,009 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:50,009 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:50,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable192 [2021-06-05 22:30:50,210 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:50,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:50,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1128279938, now seen corresponding path program 6 times [2021-06-05 22:30:50,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:50,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44518114] [2021-06-05 22:30:50,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:50,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:50,466 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:50,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:50,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44518114] [2021-06-05 22:30:50,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44518114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:50,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119258706] [2021-06-05 22:30:50,472 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:50,518 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:30:50,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:50,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:30:50,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:50,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:30:50,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:30:50,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:30:50,760 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:50,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 42 [2021-06-05 22:30:50,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:30:50,793 INFO L628 ElimStorePlain]: treesize reduction 27, result has 52.6 percent of original size [2021-06-05 22:30:50,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:50,800 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:24 [2021-06-05 22:30:50,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:50,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119258706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:50,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:50,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2021-06-05 22:30:50,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489764214] [2021-06-05 22:30:50,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 22:30:50,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:50,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 22:30:50,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:30:50,912 INFO L87 Difference]: Start difference. First operand 3979 states and 17759 transitions. Second operand has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:52,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:52,161 INFO L93 Difference]: Finished difference Result 4720 states and 20746 transitions. [2021-06-05 22:30:52,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:30:52,161 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:30:52,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:52,171 INFO L225 Difference]: With dead ends: 4720 [2021-06-05 22:30:52,171 INFO L226 Difference]: Without dead ends: 4639 [2021-06-05 22:30:52,171 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 982.4ms TimeCoverageRelationStatistics Valid=201, Invalid=1605, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:30:52,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4639 states. [2021-06-05 22:30:52,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4639 to 3979. [2021-06-05 22:30:52,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3979 states, 3978 states have (on average 4.464303670186023) internal successors, (17759), 3978 states have internal predecessors, (17759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:52,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3979 states to 3979 states and 17759 transitions. [2021-06-05 22:30:52,234 INFO L78 Accepts]: Start accepts. Automaton has 3979 states and 17759 transitions. Word has length 30 [2021-06-05 22:30:52,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:52,234 INFO L482 AbstractCegarLoop]: Abstraction has 3979 states and 17759 transitions. [2021-06-05 22:30:52,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:52,234 INFO L276 IsEmpty]: Start isEmpty. Operand 3979 states and 17759 transitions. [2021-06-05 22:30:52,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:30:52,240 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:52,240 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:52,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:52,440 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:52,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:52,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1727284940, now seen corresponding path program 22 times [2021-06-05 22:30:52,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:52,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520955803] [2021-06-05 22:30:52,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:52,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:52,688 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:52,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:52,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520955803] [2021-06-05 22:30:52,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520955803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:52,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412708600] [2021-06-05 22:30:52,689 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:52,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:30:52,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:52,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:30:52,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:52,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:30:52,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:30:52,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:30:52,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 22:30:52,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:52,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:52,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:52,995 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:11 [2021-06-05 22:30:53,042 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:53,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412708600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:53,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:53,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:30:53,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537749820] [2021-06-05 22:30:53,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:30:53,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:53,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:30:53,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:30:53,043 INFO L87 Difference]: Start difference. First operand 3979 states and 17759 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:54,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:54,828 INFO L93 Difference]: Finished difference Result 5261 states and 22917 transitions. [2021-06-05 22:30:54,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:30:54,829 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:30:54,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:54,839 INFO L225 Difference]: With dead ends: 5261 [2021-06-05 22:30:54,839 INFO L226 Difference]: Without dead ends: 5069 [2021-06-05 22:30:54,840 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 1264.4ms TimeCoverageRelationStatistics Valid=313, Invalid=1667, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:30:54,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5069 states. [2021-06-05 22:30:54,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5069 to 4014. [2021-06-05 22:30:54,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4014 states, 4013 states have (on average 4.46922501868926) internal successors, (17935), 4013 states have internal predecessors, (17935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:54,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4014 states to 4014 states and 17935 transitions. [2021-06-05 22:30:54,910 INFO L78 Accepts]: Start accepts. Automaton has 4014 states and 17935 transitions. Word has length 30 [2021-06-05 22:30:54,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:54,911 INFO L482 AbstractCegarLoop]: Abstraction has 4014 states and 17935 transitions. [2021-06-05 22:30:54,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:54,911 INFO L276 IsEmpty]: Start isEmpty. Operand 4014 states and 17935 transitions. [2021-06-05 22:30:54,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:30:54,917 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:54,917 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:55,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:55,118 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:55,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:55,118 INFO L82 PathProgramCache]: Analyzing trace with hash 300371958, now seen corresponding path program 7 times [2021-06-05 22:30:55,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:55,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455366761] [2021-06-05 22:30:55,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:55,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:55,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:55,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:55,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455366761] [2021-06-05 22:30:55,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455366761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:55,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546995288] [2021-06-05 22:30:55,322 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:55,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:55,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:30:55,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:55,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:30:55,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:30:55,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:30:55,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 22:30:55,617 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:55,624 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:55,625 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:55,625 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:14 [2021-06-05 22:30:55,695 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:55,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546995288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:55,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:55,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 22:30:55,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313316281] [2021-06-05 22:30:55,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:30:55,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:55,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:30:55,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:30:55,696 INFO L87 Difference]: Start difference. First operand 4014 states and 17935 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:56,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:56,742 INFO L93 Difference]: Finished difference Result 4912 states and 21474 transitions. [2021-06-05 22:30:56,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:30:56,743 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:30:56,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:56,752 INFO L225 Difference]: With dead ends: 4912 [2021-06-05 22:30:56,752 INFO L226 Difference]: Without dead ends: 4839 [2021-06-05 22:30:56,753 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 754.1ms TimeCoverageRelationStatistics Valid=196, Invalid=1136, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:30:56,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4839 states. [2021-06-05 22:30:56,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4839 to 3996. [2021-06-05 22:30:56,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3996 states, 3995 states have (on average 4.473091364205256) internal successors, (17870), 3995 states have internal predecessors, (17870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:56,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3996 states to 3996 states and 17870 transitions. [2021-06-05 22:30:56,817 INFO L78 Accepts]: Start accepts. Automaton has 3996 states and 17870 transitions. Word has length 30 [2021-06-05 22:30:56,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:56,817 INFO L482 AbstractCegarLoop]: Abstraction has 3996 states and 17870 transitions. [2021-06-05 22:30:56,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:56,817 INFO L276 IsEmpty]: Start isEmpty. Operand 3996 states and 17870 transitions. [2021-06-05 22:30:56,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:30:56,823 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:56,823 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:57,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:57,024 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:57,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:57,024 INFO L82 PathProgramCache]: Analyzing trace with hash 800539618, now seen corresponding path program 53 times [2021-06-05 22:30:57,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:57,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751370089] [2021-06-05 22:30:57,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:57,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:57,206 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:57,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:57,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751370089] [2021-06-05 22:30:57,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751370089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:57,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954864364] [2021-06-05 22:30:57,206 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:57,242 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:30:57,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:57,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:30:57,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:57,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 22:30:57,387 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:30:57,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:57,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:57,389 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 22:30:57,424 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:57,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954864364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:57,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:57,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:30:57,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487748174] [2021-06-05 22:30:57,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:30:57,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:57,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:30:57,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:30:57,425 INFO L87 Difference]: Start difference. First operand 3996 states and 17870 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:58,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:30:58,972 INFO L93 Difference]: Finished difference Result 6208 states and 26833 transitions. [2021-06-05 22:30:58,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 22:30:58,973 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:30:58,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:30:58,985 INFO L225 Difference]: With dead ends: 6208 [2021-06-05 22:30:58,985 INFO L226 Difference]: Without dead ends: 6026 [2021-06-05 22:30:58,985 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 971.9ms TimeCoverageRelationStatistics Valid=376, Invalid=2276, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 22:30:58,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6026 states. [2021-06-05 22:30:59,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6026 to 4094. [2021-06-05 22:30:59,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4094 states, 4093 states have (on average 4.472269728805277) internal successors, (18305), 4093 states have internal predecessors, (18305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:59,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4094 states to 4094 states and 18305 transitions. [2021-06-05 22:30:59,085 INFO L78 Accepts]: Start accepts. Automaton has 4094 states and 18305 transitions. Word has length 30 [2021-06-05 22:30:59,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:30:59,085 INFO L482 AbstractCegarLoop]: Abstraction has 4094 states and 18305 transitions. [2021-06-05 22:30:59,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:30:59,085 INFO L276 IsEmpty]: Start isEmpty. Operand 4094 states and 18305 transitions. [2021-06-05 22:30:59,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:30:59,091 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:30:59,091 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:30:59,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-06-05 22:30:59,292 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:30:59,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:30:59,292 INFO L82 PathProgramCache]: Analyzing trace with hash 2105279012, now seen corresponding path program 8 times [2021-06-05 22:30:59,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:30:59,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954200995] [2021-06-05 22:30:59,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:30:59,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:30:59,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:59,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:30:59,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954200995] [2021-06-05 22:30:59,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954200995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:59,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560814624] [2021-06-05 22:30:59,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:30:59,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:30:59,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:30:59,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:30:59,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:30:59,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:30:59,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:30:59,758 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:59,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2021-06-05 22:30:59,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:30:59,768 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:30:59,769 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:30:59,769 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:22 [2021-06-05 22:30:59,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:30:59,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560814624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:30:59,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:30:59,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:30:59,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209367163] [2021-06-05 22:30:59,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:30:59,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:30:59,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:30:59,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:30:59,846 INFO L87 Difference]: Start difference. First operand 4094 states and 18305 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:02,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:02,054 INFO L93 Difference]: Finished difference Result 5912 states and 25340 transitions. [2021-06-05 22:31:02,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 22:31:02,054 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:31:02,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:02,065 INFO L225 Difference]: With dead ends: 5912 [2021-06-05 22:31:02,065 INFO L226 Difference]: Without dead ends: 5564 [2021-06-05 22:31:02,066 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 1498.2ms TimeCoverageRelationStatistics Valid=412, Invalid=3010, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 22:31:02,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5564 states. [2021-06-05 22:31:02,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5564 to 4100. [2021-06-05 22:31:02,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4100 states, 4099 states have (on average 4.47011466211271) internal successors, (18323), 4099 states have internal predecessors, (18323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:02,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4100 states to 4100 states and 18323 transitions. [2021-06-05 22:31:02,159 INFO L78 Accepts]: Start accepts. Automaton has 4100 states and 18323 transitions. Word has length 30 [2021-06-05 22:31:02,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:02,160 INFO L482 AbstractCegarLoop]: Abstraction has 4100 states and 18323 transitions. [2021-06-05 22:31:02,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:02,160 INFO L276 IsEmpty]: Start isEmpty. Operand 4100 states and 18323 transitions. [2021-06-05 22:31:02,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:31:02,166 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:02,166 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:02,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-06-05 22:31:02,367 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:02,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:02,367 INFO L82 PathProgramCache]: Analyzing trace with hash -381875840, now seen corresponding path program 54 times [2021-06-05 22:31:02,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:02,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340651831] [2021-06-05 22:31:02,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:02,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:02,576 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:02,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:02,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340651831] [2021-06-05 22:31:02,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340651831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:02,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112219494] [2021-06-05 22:31:02,576 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:02,613 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:31:02,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:02,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:31:02,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:02,748 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:02,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 22:31:02,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:02,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:02,759 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:02,759 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 22:31:02,881 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:02,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112219494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:02,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:02,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:31:02,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103025702] [2021-06-05 22:31:02,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:31:02,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:02,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:31:02,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:31:02,882 INFO L87 Difference]: Start difference. First operand 4100 states and 18323 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:04,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:04,701 INFO L93 Difference]: Finished difference Result 6189 states and 26443 transitions. [2021-06-05 22:31:04,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 22:31:04,701 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:31:04,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:04,713 INFO L225 Difference]: With dead ends: 6189 [2021-06-05 22:31:04,713 INFO L226 Difference]: Without dead ends: 5993 [2021-06-05 22:31:04,713 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 1324.4ms TimeCoverageRelationStatistics Valid=391, Invalid=2261, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 22:31:04,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5993 states. [2021-06-05 22:31:04,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5993 to 4143. [2021-06-05 22:31:04,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4143 states, 4142 states have (on average 4.466441332689522) internal successors, (18500), 4142 states have internal predecessors, (18500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:04,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4143 states to 4143 states and 18500 transitions. [2021-06-05 22:31:04,781 INFO L78 Accepts]: Start accepts. Automaton has 4143 states and 18500 transitions. Word has length 30 [2021-06-05 22:31:04,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:04,781 INFO L482 AbstractCegarLoop]: Abstraction has 4143 states and 18500 transitions. [2021-06-05 22:31:04,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:04,781 INFO L276 IsEmpty]: Start isEmpty. Operand 4143 states and 18500 transitions. [2021-06-05 22:31:04,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:31:04,788 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:04,788 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:04,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2021-06-05 22:31:04,988 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:04,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:04,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1170896104, now seen corresponding path program 55 times [2021-06-05 22:31:04,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:04,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975787695] [2021-06-05 22:31:04,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:04,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:05,167 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:05,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:05,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975787695] [2021-06-05 22:31:05,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975787695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:05,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860753979] [2021-06-05 22:31:05,167 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:05,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:05,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:31:05,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:05,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:31:05,360 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:05,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:05,363 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:05,363 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:31:05,424 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:05,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860753979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:05,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:05,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:31:05,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475900715] [2021-06-05 22:31:05,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:31:05,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:05,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:31:05,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:31:05,425 INFO L87 Difference]: Start difference. First operand 4143 states and 18500 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:06,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:06,947 INFO L93 Difference]: Finished difference Result 6154 states and 26681 transitions. [2021-06-05 22:31:06,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 22:31:06,948 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:31:06,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:06,960 INFO L225 Difference]: With dead ends: 6154 [2021-06-05 22:31:06,960 INFO L226 Difference]: Without dead ends: 6072 [2021-06-05 22:31:06,960 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 1186.4ms TimeCoverageRelationStatistics Valid=449, Invalid=2413, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 22:31:06,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6072 states. [2021-06-05 22:31:07,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6072 to 4139. [2021-06-05 22:31:07,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4139 states, 4138 states have (on average 4.467133881101982) internal successors, (18485), 4138 states have internal predecessors, (18485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:07,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4139 states to 4139 states and 18485 transitions. [2021-06-05 22:31:07,045 INFO L78 Accepts]: Start accepts. Automaton has 4139 states and 18485 transitions. Word has length 30 [2021-06-05 22:31:07,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:07,045 INFO L482 AbstractCegarLoop]: Abstraction has 4139 states and 18485 transitions. [2021-06-05 22:31:07,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:07,045 INFO L276 IsEmpty]: Start isEmpty. Operand 4139 states and 18485 transitions. [2021-06-05 22:31:07,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:31:07,051 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:07,051 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:07,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:07,252 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:07,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:07,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1746601602, now seen corresponding path program 9 times [2021-06-05 22:31:07,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:07,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120390998] [2021-06-05 22:31:07,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:07,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:07,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:07,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:07,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120390998] [2021-06-05 22:31:07,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120390998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:07,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307335362] [2021-06-05 22:31:07,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:07,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:31:07,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:07,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:31:07,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:07,664 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:07,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 22:31:07,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:07,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:07,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:07,676 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 22:31:07,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:07,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307335362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:07,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:07,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:31:07,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943068159] [2021-06-05 22:31:07,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:31:07,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:07,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:31:07,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:31:07,785 INFO L87 Difference]: Start difference. First operand 4139 states and 18485 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:09,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:09,956 INFO L93 Difference]: Finished difference Result 5882 states and 25230 transitions. [2021-06-05 22:31:09,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 22:31:09,957 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:31:09,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:09,968 INFO L225 Difference]: With dead ends: 5882 [2021-06-05 22:31:09,968 INFO L226 Difference]: Without dead ends: 5569 [2021-06-05 22:31:09,969 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 1615.5ms TimeCoverageRelationStatistics Valid=419, Invalid=2887, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 22:31:09,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5569 states. [2021-06-05 22:31:10,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5569 to 4166. [2021-06-05 22:31:10,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4166 states, 4165 states have (on average 4.465546218487395) internal successors, (18599), 4165 states have internal predecessors, (18599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:10,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4166 states to 4166 states and 18599 transitions. [2021-06-05 22:31:10,040 INFO L78 Accepts]: Start accepts. Automaton has 4166 states and 18599 transitions. Word has length 30 [2021-06-05 22:31:10,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:10,040 INFO L482 AbstractCegarLoop]: Abstraction has 4166 states and 18599 transitions. [2021-06-05 22:31:10,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:10,040 INFO L276 IsEmpty]: Start isEmpty. Operand 4166 states and 18599 transitions. [2021-06-05 22:31:10,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:31:10,046 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:10,046 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:10,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:10,247 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:10,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:10,247 INFO L82 PathProgramCache]: Analyzing trace with hash 351014526, now seen corresponding path program 10 times [2021-06-05 22:31:10,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:10,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736827412] [2021-06-05 22:31:10,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:10,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:10,458 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:10,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:10,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736827412] [2021-06-05 22:31:10,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736827412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:10,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395520024] [2021-06-05 22:31:10,458 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:10,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:31:10,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:10,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:31:10,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:10,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:31:10,614 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:10,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:10,617 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:10,617 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:31:10,669 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:10,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395520024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:10,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:10,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:31:10,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963910996] [2021-06-05 22:31:10,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:31:10,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:10,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:31:10,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:31:10,670 INFO L87 Difference]: Start difference. First operand 4166 states and 18599 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:12,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:12,631 INFO L93 Difference]: Finished difference Result 5721 states and 24904 transitions. [2021-06-05 22:31:12,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 22:31:12,631 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:31:12,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:12,641 INFO L225 Difference]: With dead ends: 5721 [2021-06-05 22:31:12,642 INFO L226 Difference]: Without dead ends: 5638 [2021-06-05 22:31:12,642 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 1555.8ms TimeCoverageRelationStatistics Valid=489, Invalid=2703, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 22:31:12,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5638 states. [2021-06-05 22:31:12,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5638 to 4157. [2021-06-05 22:31:12,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4157 states, 4156 states have (on average 4.467516843118383) internal successors, (18567), 4156 states have internal predecessors, (18567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:12,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4157 states to 4157 states and 18567 transitions. [2021-06-05 22:31:12,713 INFO L78 Accepts]: Start accepts. Automaton has 4157 states and 18567 transitions. Word has length 30 [2021-06-05 22:31:12,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:12,714 INFO L482 AbstractCegarLoop]: Abstraction has 4157 states and 18567 transitions. [2021-06-05 22:31:12,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:12,714 INFO L276 IsEmpty]: Start isEmpty. Operand 4157 states and 18567 transitions. [2021-06-05 22:31:12,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:31:12,720 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:12,720 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:12,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:12,920 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:12,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:12,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1634241206, now seen corresponding path program 56 times [2021-06-05 22:31:12,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:12,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552138605] [2021-06-05 22:31:12,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:12,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:13,137 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:13,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:13,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552138605] [2021-06-05 22:31:13,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552138605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:13,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978404138] [2021-06-05 22:31:13,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:13,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:31:13,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:13,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:31:13,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:13,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:31:13,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:31:13,361 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:13,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2021-06-05 22:31:13,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:31:13,386 INFO L628 ElimStorePlain]: treesize reduction 25, result has 46.8 percent of original size [2021-06-05 22:31:13,386 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:13,386 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:22 [2021-06-05 22:31:13,462 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:13,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978404138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:13,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:13,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:31:13,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593932963] [2021-06-05 22:31:13,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:31:13,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:13,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:31:13,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:31:13,463 INFO L87 Difference]: Start difference. First operand 4157 states and 18567 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:15,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:15,639 INFO L93 Difference]: Finished difference Result 6423 states and 27371 transitions. [2021-06-05 22:31:15,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 22:31:15,640 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:31:15,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:15,652 INFO L225 Difference]: With dead ends: 6423 [2021-06-05 22:31:15,652 INFO L226 Difference]: Without dead ends: 6097 [2021-06-05 22:31:15,652 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 1292.6ms TimeCoverageRelationStatistics Valid=386, Invalid=2694, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 22:31:15,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6097 states. [2021-06-05 22:31:15,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6097 to 4207. [2021-06-05 22:31:15,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4207 states, 4206 states have (on average 4.46528768426058) internal successors, (18781), 4206 states have internal predecessors, (18781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:15,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4207 states to 4207 states and 18781 transitions. [2021-06-05 22:31:15,725 INFO L78 Accepts]: Start accepts. Automaton has 4207 states and 18781 transitions. Word has length 30 [2021-06-05 22:31:15,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:15,725 INFO L482 AbstractCegarLoop]: Abstraction has 4207 states and 18781 transitions. [2021-06-05 22:31:15,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:15,725 INFO L276 IsEmpty]: Start isEmpty. Operand 4207 states and 18781 transitions. [2021-06-05 22:31:15,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:31:15,731 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:15,732 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:15,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-06-05 22:31:15,932 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:15,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:15,932 INFO L82 PathProgramCache]: Analyzing trace with hash -329501812, now seen corresponding path program 11 times [2021-06-05 22:31:15,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:15,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147371197] [2021-06-05 22:31:15,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:15,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:16,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:16,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:16,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147371197] [2021-06-05 22:31:16,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147371197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:16,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985252847] [2021-06-05 22:31:16,123 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:16,159 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:31:16,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:16,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:31:16,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:16,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 22:31:16,312 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:16,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:16,313 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:16,314 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 22:31:16,347 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:16,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985252847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:16,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:16,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:31:16,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647055893] [2021-06-05 22:31:16,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:31:16,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:16,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:31:16,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:31:16,348 INFO L87 Difference]: Start difference. First operand 4207 states and 18781 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:17,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:17,914 INFO L93 Difference]: Finished difference Result 6015 states and 26020 transitions. [2021-06-05 22:31:17,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 22:31:17,914 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:31:17,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:17,925 INFO L225 Difference]: With dead ends: 6015 [2021-06-05 22:31:17,926 INFO L226 Difference]: Without dead ends: 5833 [2021-06-05 22:31:17,926 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 1058.6ms TimeCoverageRelationStatistics Valid=305, Invalid=1765, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 22:31:17,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5833 states. [2021-06-05 22:31:17,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5833 to 4239. [2021-06-05 22:31:17,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4239 states, 4238 states have (on average 4.460830580462482) internal successors, (18905), 4238 states have internal predecessors, (18905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:17,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4239 states to 4239 states and 18905 transitions. [2021-06-05 22:31:17,999 INFO L78 Accepts]: Start accepts. Automaton has 4239 states and 18905 transitions. Word has length 30 [2021-06-05 22:31:17,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:17,999 INFO L482 AbstractCegarLoop]: Abstraction has 4239 states and 18905 transitions. [2021-06-05 22:31:17,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:17,999 INFO L276 IsEmpty]: Start isEmpty. Operand 4239 states and 18905 transitions. [2021-06-05 22:31:18,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:31:18,005 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:18,005 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:18,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-06-05 22:31:18,206 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:18,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:18,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1952911604, now seen corresponding path program 12 times [2021-06-05 22:31:18,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:18,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753289001] [2021-06-05 22:31:18,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:18,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:18,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:18,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:18,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753289001] [2021-06-05 22:31:18,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753289001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:18,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037660504] [2021-06-05 22:31:18,415 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:18,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:31:18,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:18,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:31:18,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:18,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:31:18,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:31:18,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:31:18,648 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:18,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 42 [2021-06-05 22:31:18,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:31:18,685 INFO L628 ElimStorePlain]: treesize reduction 27, result has 52.6 percent of original size [2021-06-05 22:31:18,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:18,688 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:24 [2021-06-05 22:31:18,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:18,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037660504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:18,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:18,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:31:18,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373449318] [2021-06-05 22:31:18,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:31:18,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:18,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:31:18,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:31:18,797 INFO L87 Difference]: Start difference. First operand 4239 states and 18905 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:20,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:20,352 INFO L93 Difference]: Finished difference Result 5775 states and 24871 transitions. [2021-06-05 22:31:20,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:31:20,353 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:31:20,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:20,365 INFO L225 Difference]: With dead ends: 5775 [2021-06-05 22:31:20,365 INFO L226 Difference]: Without dead ends: 5492 [2021-06-05 22:31:20,365 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 1102.8ms TimeCoverageRelationStatistics Valid=271, Invalid=1621, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:31:20,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5492 states. [2021-06-05 22:31:20,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5492 to 4251. [2021-06-05 22:31:20,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4251 states, 4250 states have (on average 4.459764705882353) internal successors, (18954), 4250 states have internal predecessors, (18954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:20,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4251 states to 4251 states and 18954 transitions. [2021-06-05 22:31:20,504 INFO L78 Accepts]: Start accepts. Automaton has 4251 states and 18954 transitions. Word has length 30 [2021-06-05 22:31:20,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:20,504 INFO L482 AbstractCegarLoop]: Abstraction has 4251 states and 18954 transitions. [2021-06-05 22:31:20,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:20,504 INFO L276 IsEmpty]: Start isEmpty. Operand 4251 states and 18954 transitions. [2021-06-05 22:31:20,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:31:20,513 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:20,513 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:20,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-06-05 22:31:20,729 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:20,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:20,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1835709426, now seen corresponding path program 13 times [2021-06-05 22:31:20,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:20,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389133928] [2021-06-05 22:31:20,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:20,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:20,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:20,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:20,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389133928] [2021-06-05 22:31:20,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389133928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:20,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469543342] [2021-06-05 22:31:20,912 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:20,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:20,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:31:20,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:21,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 22:31:21,077 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:21,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:21,080 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:21,080 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 22:31:21,129 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:21,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469543342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:21,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:21,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:31:21,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079486264] [2021-06-05 22:31:21,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:31:21,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:21,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:31:21,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:31:21,130 INFO L87 Difference]: Start difference. First operand 4251 states and 18954 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:22,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:22,523 INFO L93 Difference]: Finished difference Result 5808 states and 25286 transitions. [2021-06-05 22:31:22,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 22:31:22,523 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:31:22,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:22,535 INFO L225 Difference]: With dead ends: 5808 [2021-06-05 22:31:22,535 INFO L226 Difference]: Without dead ends: 5709 [2021-06-05 22:31:22,535 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 1002.7ms TimeCoverageRelationStatistics Valid=328, Invalid=1742, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 22:31:22,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5709 states. [2021-06-05 22:31:22,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5709 to 4219. [2021-06-05 22:31:22,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4219 states, 4218 states have (on average 4.463963963963964) internal successors, (18829), 4218 states have internal predecessors, (18829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:22,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4219 states to 4219 states and 18829 transitions. [2021-06-05 22:31:22,607 INFO L78 Accepts]: Start accepts. Automaton has 4219 states and 18829 transitions. Word has length 30 [2021-06-05 22:31:22,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:22,608 INFO L482 AbstractCegarLoop]: Abstraction has 4219 states and 18829 transitions. [2021-06-05 22:31:22,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:22,608 INFO L276 IsEmpty]: Start isEmpty. Operand 4219 states and 18829 transitions. [2021-06-05 22:31:22,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:31:22,614 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:22,614 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:22,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:22,814 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:22,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:22,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1331922536, now seen corresponding path program 14 times [2021-06-05 22:31:22,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:22,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918356754] [2021-06-05 22:31:22,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:22,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:23,039 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:23,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:23,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918356754] [2021-06-05 22:31:23,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918356754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:23,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189009575] [2021-06-05 22:31:23,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:23,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:31:23,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:23,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:31:23,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:23,230 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:23,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 22:31:23,231 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:23,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:23,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:23,244 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 22:31:23,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:23,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189009575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:23,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:23,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:31:23,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200760811] [2021-06-05 22:31:23,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:31:23,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:23,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:31:23,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:31:23,388 INFO L87 Difference]: Start difference. First operand 4219 states and 18829 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:25,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:25,727 INFO L93 Difference]: Finished difference Result 5840 states and 25153 transitions. [2021-06-05 22:31:25,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 22:31:25,728 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:31:25,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:25,739 INFO L225 Difference]: With dead ends: 5840 [2021-06-05 22:31:25,739 INFO L226 Difference]: Without dead ends: 5684 [2021-06-05 22:31:25,740 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 1805.0ms TimeCoverageRelationStatistics Valid=423, Invalid=2999, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 22:31:25,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5684 states. [2021-06-05 22:31:25,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5684 to 4234. [2021-06-05 22:31:25,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4234 states, 4233 states have (on average 4.462556106780061) internal successors, (18890), 4233 states have internal predecessors, (18890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:25,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4234 states to 4234 states and 18890 transitions. [2021-06-05 22:31:25,810 INFO L78 Accepts]: Start accepts. Automaton has 4234 states and 18890 transitions. Word has length 30 [2021-06-05 22:31:25,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:25,810 INFO L482 AbstractCegarLoop]: Abstraction has 4234 states and 18890 transitions. [2021-06-05 22:31:25,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:25,810 INFO L276 IsEmpty]: Start isEmpty. Operand 4234 states and 18890 transitions. [2021-06-05 22:31:25,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:31:25,816 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:25,816 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:26,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-06-05 22:31:26,017 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:26,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:26,017 INFO L82 PathProgramCache]: Analyzing trace with hash -63664540, now seen corresponding path program 15 times [2021-06-05 22:31:26,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:26,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168564152] [2021-06-05 22:31:26,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:26,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:26,243 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:26,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:26,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168564152] [2021-06-05 22:31:26,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168564152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:26,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89997127] [2021-06-05 22:31:26,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:26,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:31:26,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:26,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:31:26,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:26,435 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:26,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 22:31:26,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:26,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:26,451 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:26,451 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 22:31:26,585 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:26,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89997127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:26,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:26,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:31:26,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940317832] [2021-06-05 22:31:26,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:31:26,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:26,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:31:26,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:31:26,586 INFO L87 Difference]: Start difference. First operand 4234 states and 18890 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:29,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:29,079 INFO L93 Difference]: Finished difference Result 6056 states and 26106 transitions. [2021-06-05 22:31:29,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 22:31:29,079 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:31:29,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:29,091 INFO L225 Difference]: With dead ends: 6056 [2021-06-05 22:31:29,091 INFO L226 Difference]: Without dead ends: 5858 [2021-06-05 22:31:29,091 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1070 ImplicationChecksByTransitivity, 2016.6ms TimeCoverageRelationStatistics Valid=517, Invalid=3143, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 22:31:29,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5858 states. [2021-06-05 22:31:29,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5858 to 4234. [2021-06-05 22:31:29,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4234 states, 4233 states have (on average 4.462556106780061) internal successors, (18890), 4233 states have internal predecessors, (18890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:29,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4234 states to 4234 states and 18890 transitions. [2021-06-05 22:31:29,165 INFO L78 Accepts]: Start accepts. Automaton has 4234 states and 18890 transitions. Word has length 30 [2021-06-05 22:31:29,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:29,165 INFO L482 AbstractCegarLoop]: Abstraction has 4234 states and 18890 transitions. [2021-06-05 22:31:29,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:29,165 INFO L276 IsEmpty]: Start isEmpty. Operand 4234 states and 18890 transitions. [2021-06-05 22:31:29,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:31:29,171 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:29,171 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:29,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:29,372 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:29,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:29,372 INFO L82 PathProgramCache]: Analyzing trace with hash -427368126, now seen corresponding path program 16 times [2021-06-05 22:31:29,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:29,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704064099] [2021-06-05 22:31:29,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:29,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:29,545 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:29,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:29,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704064099] [2021-06-05 22:31:29,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704064099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:29,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344626597] [2021-06-05 22:31:29,545 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:29,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:31:29,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:29,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:31:29,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:29,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:31:29,687 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:29,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:29,693 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:29,693 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 22:31:29,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:29,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344626597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:29,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:29,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:31:29,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220885582] [2021-06-05 22:31:29,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:31:29,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:29,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:31:29,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:31:29,777 INFO L87 Difference]: Start difference. First operand 4234 states and 18890 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:31,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:31,163 INFO L93 Difference]: Finished difference Result 5452 states and 23785 transitions. [2021-06-05 22:31:31,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:31:31,164 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:31:31,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:31,174 INFO L225 Difference]: With dead ends: 5452 [2021-06-05 22:31:31,174 INFO L226 Difference]: Without dead ends: 5379 [2021-06-05 22:31:31,175 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 1053.6ms TimeCoverageRelationStatistics Valid=259, Invalid=1381, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:31:31,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5379 states. [2021-06-05 22:31:31,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5379 to 4239. [2021-06-05 22:31:31,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4239 states, 4238 states have (on average 4.4624823029731004) internal successors, (18912), 4238 states have internal predecessors, (18912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:31,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4239 states to 4239 states and 18912 transitions. [2021-06-05 22:31:31,244 INFO L78 Accepts]: Start accepts. Automaton has 4239 states and 18912 transitions. Word has length 30 [2021-06-05 22:31:31,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:31,244 INFO L482 AbstractCegarLoop]: Abstraction has 4239 states and 18912 transitions. [2021-06-05 22:31:31,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:31,244 INFO L276 IsEmpty]: Start isEmpty. Operand 4239 states and 18912 transitions. [2021-06-05 22:31:31,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:31:31,250 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:31,250 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:31,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-06-05 22:31:31,451 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:31,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:31,451 INFO L82 PathProgramCache]: Analyzing trace with hash -960125108, now seen corresponding path program 17 times [2021-06-05 22:31:31,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:31,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619823887] [2021-06-05 22:31:31,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:31,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:31,596 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:31,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:31,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619823887] [2021-06-05 22:31:31,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619823887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:31,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937782192] [2021-06-05 22:31:31,597 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:31,633 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:31:31,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:31,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:31:31,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:31,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:31:31,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:31:31,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:31:31,796 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:31,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-06-05 22:31:31,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:31,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:31,837 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:31,837 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:94 [2021-06-05 22:31:31,972 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:31,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937782192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:31,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:31,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-05 22:31:31,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443352132] [2021-06-05 22:31:31,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:31:31,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:31,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:31:31,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:31:31,973 INFO L87 Difference]: Start difference. First operand 4239 states and 18912 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:33,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:33,242 INFO L93 Difference]: Finished difference Result 5163 states and 22549 transitions. [2021-06-05 22:31:33,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:31:33,242 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:31:33,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:33,252 INFO L225 Difference]: With dead ends: 5163 [2021-06-05 22:31:33,252 INFO L226 Difference]: Without dead ends: 5104 [2021-06-05 22:31:33,253 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 991.3ms TimeCoverageRelationStatistics Valid=237, Invalid=1403, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:31:33,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5104 states. [2021-06-05 22:31:33,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5104 to 4237. [2021-06-05 22:31:33,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4237 states, 4236 states have (on average 4.4627006610009445) internal successors, (18904), 4236 states have internal predecessors, (18904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:33,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4237 states to 4237 states and 18904 transitions. [2021-06-05 22:31:33,321 INFO L78 Accepts]: Start accepts. Automaton has 4237 states and 18904 transitions. Word has length 30 [2021-06-05 22:31:33,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:33,321 INFO L482 AbstractCegarLoop]: Abstraction has 4237 states and 18904 transitions. [2021-06-05 22:31:33,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:33,321 INFO L276 IsEmpty]: Start isEmpty. Operand 4237 states and 18904 transitions. [2021-06-05 22:31:33,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:31:33,327 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:33,328 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:33,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:33,528 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:33,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:33,528 INFO L82 PathProgramCache]: Analyzing trace with hash -78591196, now seen corresponding path program 18 times [2021-06-05 22:31:33,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:33,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949476596] [2021-06-05 22:31:33,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:33,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:33,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:33,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:33,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949476596] [2021-06-05 22:31:33,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949476596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:33,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943364302] [2021-06-05 22:31:33,725 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:33,772 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:31:33,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:33,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:31:33,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:33,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:31:33,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:31:33,900 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:33,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 22:31:33,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:33,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:33,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:33,921 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:53 [2021-06-05 22:31:34,121 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:34,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943364302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:34,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:34,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 22:31:34,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718408071] [2021-06-05 22:31:34,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:31:34,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:34,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:31:34,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:31:34,122 INFO L87 Difference]: Start difference. First operand 4237 states and 18904 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:35,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:35,886 INFO L93 Difference]: Finished difference Result 5671 states and 24419 transitions. [2021-06-05 22:31:35,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:31:35,887 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:31:35,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:35,898 INFO L225 Difference]: With dead ends: 5671 [2021-06-05 22:31:35,899 INFO L226 Difference]: Without dead ends: 5525 [2021-06-05 22:31:35,899 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 1258.7ms TimeCoverageRelationStatistics Valid=321, Invalid=2031, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 22:31:35,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5525 states. [2021-06-05 22:31:35,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5525 to 4234. [2021-06-05 22:31:35,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4234 states, 4233 states have (on average 4.462556106780061) internal successors, (18890), 4233 states have internal predecessors, (18890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:36,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4234 states to 4234 states and 18890 transitions. [2021-06-05 22:31:36,003 INFO L78 Accepts]: Start accepts. Automaton has 4234 states and 18890 transitions. Word has length 30 [2021-06-05 22:31:36,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:36,003 INFO L482 AbstractCegarLoop]: Abstraction has 4234 states and 18890 transitions. [2021-06-05 22:31:36,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:36,003 INFO L276 IsEmpty]: Start isEmpty. Operand 4234 states and 18890 transitions. [2021-06-05 22:31:36,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:31:36,009 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:36,009 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:36,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-05 22:31:36,210 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:36,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:36,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1489107404, now seen corresponding path program 19 times [2021-06-05 22:31:36,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:36,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913513774] [2021-06-05 22:31:36,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:36,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:36,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:36,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:36,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913513774] [2021-06-05 22:31:36,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913513774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:36,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654395284] [2021-06-05 22:31:36,382 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:36,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:36,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:31:36,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:36,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:31:36,520 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:36,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:36,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:36,524 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 22:31:36,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:36,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654395284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:36,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:36,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:31:36,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928856755] [2021-06-05 22:31:36,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:31:36,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:36,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:31:36,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:31:36,593 INFO L87 Difference]: Start difference. First operand 4234 states and 18890 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:38,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:38,196 INFO L93 Difference]: Finished difference Result 5602 states and 24458 transitions. [2021-06-05 22:31:38,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 22:31:38,197 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:31:38,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:38,209 INFO L225 Difference]: With dead ends: 5602 [2021-06-05 22:31:38,209 INFO L226 Difference]: Without dead ends: 5521 [2021-06-05 22:31:38,209 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 1234.1ms TimeCoverageRelationStatistics Valid=321, Invalid=1571, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:31:38,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5521 states. [2021-06-05 22:31:38,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5521 to 4244. [2021-06-05 22:31:38,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4244 states, 4243 states have (on average 4.460994579307094) internal successors, (18928), 4243 states have internal predecessors, (18928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:38,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4244 states to 4244 states and 18928 transitions. [2021-06-05 22:31:38,281 INFO L78 Accepts]: Start accepts. Automaton has 4244 states and 18928 transitions. Word has length 30 [2021-06-05 22:31:38,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:38,281 INFO L482 AbstractCegarLoop]: Abstraction has 4244 states and 18928 transitions. [2021-06-05 22:31:38,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:38,281 INFO L276 IsEmpty]: Start isEmpty. Operand 4244 states and 18928 transitions. [2021-06-05 22:31:38,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:31:38,287 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:38,287 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:38,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:38,488 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:38,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:38,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1061495886, now seen corresponding path program 20 times [2021-06-05 22:31:38,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:38,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171506717] [2021-06-05 22:31:38,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:38,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:38,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:38,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:38,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171506717] [2021-06-05 22:31:38,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171506717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:38,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012205297] [2021-06-05 22:31:38,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:38,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:31:38,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:38,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:31:38,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:38,792 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:38,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 22:31:38,793 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:38,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:38,804 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:38,804 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 22:31:38,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:38,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012205297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:38,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:38,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:31:38,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12360833] [2021-06-05 22:31:38,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:31:38,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:38,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:31:38,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:31:38,967 INFO L87 Difference]: Start difference. First operand 4244 states and 18928 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:40,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:40,474 INFO L93 Difference]: Finished difference Result 5552 states and 24126 transitions. [2021-06-05 22:31:40,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 22:31:40,475 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:31:40,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:40,486 INFO L225 Difference]: With dead ends: 5552 [2021-06-05 22:31:40,486 INFO L226 Difference]: Without dead ends: 5471 [2021-06-05 22:31:40,486 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1137.0ms TimeCoverageRelationStatistics Valid=346, Invalid=2006, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 22:31:40,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5471 states. [2021-06-05 22:31:40,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5471 to 4231. [2021-06-05 22:31:40,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4231 states, 4230 states have (on average 4.4635933806146575) internal successors, (18881), 4230 states have internal predecessors, (18881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:40,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4231 states to 4231 states and 18881 transitions. [2021-06-05 22:31:40,560 INFO L78 Accepts]: Start accepts. Automaton has 4231 states and 18881 transitions. Word has length 30 [2021-06-05 22:31:40,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:40,560 INFO L482 AbstractCegarLoop]: Abstraction has 4231 states and 18881 transitions. [2021-06-05 22:31:40,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:40,560 INFO L276 IsEmpty]: Start isEmpty. Operand 4231 states and 18881 transitions. [2021-06-05 22:31:40,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:31:40,566 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:40,566 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:40,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:40,767 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:40,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:40,767 INFO L82 PathProgramCache]: Analyzing trace with hash -738805052, now seen corresponding path program 23 times [2021-06-05 22:31:40,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:40,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817217146] [2021-06-05 22:31:40,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:40,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:41,015 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:41,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:41,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817217146] [2021-06-05 22:31:41,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817217146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:41,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818835536] [2021-06-05 22:31:41,015 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:41,052 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:31:41,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:41,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:31:41,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:41,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:31:41,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:31:41,323 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:41,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 45 [2021-06-05 22:31:41,324 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:41,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:41,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:41,375 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:241 [2021-06-05 22:31:41,623 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:41,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818835536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:41,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:41,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:31:41,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583020583] [2021-06-05 22:31:41,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:31:41,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:41,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:31:41,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:31:41,624 INFO L87 Difference]: Start difference. First operand 4231 states and 18881 transitions. Second operand has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:42,447 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-06-05 22:31:43,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:43,468 INFO L93 Difference]: Finished difference Result 5055 states and 22181 transitions. [2021-06-05 22:31:43,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:31:43,468 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:31:43,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:43,479 INFO L225 Difference]: With dead ends: 5055 [2021-06-05 22:31:43,479 INFO L226 Difference]: Without dead ends: 5006 [2021-06-05 22:31:43,479 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1669.3ms TimeCoverageRelationStatistics Valid=243, Invalid=1737, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:31:43,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5006 states. [2021-06-05 22:31:43,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5006 to 4233. [2021-06-05 22:31:43,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4233 states, 4232 states have (on average 4.4629017013232515) internal successors, (18887), 4232 states have internal predecessors, (18887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:43,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4233 states to 4233 states and 18887 transitions. [2021-06-05 22:31:43,540 INFO L78 Accepts]: Start accepts. Automaton has 4233 states and 18887 transitions. Word has length 30 [2021-06-05 22:31:43,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:43,540 INFO L482 AbstractCegarLoop]: Abstraction has 4233 states and 18887 transitions. [2021-06-05 22:31:43,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:43,541 INFO L276 IsEmpty]: Start isEmpty. Operand 4233 states and 18887 transitions. [2021-06-05 22:31:43,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:31:43,546 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:43,546 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:43,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-06-05 22:31:43,761 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:43,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:43,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1222450446, now seen corresponding path program 24 times [2021-06-05 22:31:43,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:43,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373937037] [2021-06-05 22:31:43,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:43,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:44,013 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:44,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:44,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373937037] [2021-06-05 22:31:44,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373937037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:44,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921888876] [2021-06-05 22:31:44,014 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:44,050 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:31:44,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:44,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:31:44,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:44,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:31:44,256 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:44,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-06-05 22:31:44,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:44,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:44,275 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:44,275 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:66 [2021-06-05 22:31:44,540 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:44,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921888876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:44,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:44,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 22:31:44,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173806952] [2021-06-05 22:31:44,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:31:44,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:44,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:31:44,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:31:44,541 INFO L87 Difference]: Start difference. First operand 4233 states and 18887 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:46,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:46,903 INFO L93 Difference]: Finished difference Result 4928 states and 21374 transitions. [2021-06-05 22:31:46,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 22:31:46,904 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:31:46,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:46,914 INFO L225 Difference]: With dead ends: 4928 [2021-06-05 22:31:46,914 INFO L226 Difference]: Without dead ends: 4797 [2021-06-05 22:31:46,914 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1999.5ms TimeCoverageRelationStatistics Valid=335, Invalid=2115, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 22:31:46,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4797 states. [2021-06-05 22:31:46,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4797 to 4246. [2021-06-05 22:31:46,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4246 states, 4245 states have (on average 4.4621908127208485) internal successors, (18942), 4245 states have internal predecessors, (18942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:46,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4246 states to 4246 states and 18942 transitions. [2021-06-05 22:31:46,978 INFO L78 Accepts]: Start accepts. Automaton has 4246 states and 18942 transitions. Word has length 30 [2021-06-05 22:31:46,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:46,978 INFO L482 AbstractCegarLoop]: Abstraction has 4246 states and 18942 transitions. [2021-06-05 22:31:46,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:46,978 INFO L276 IsEmpty]: Start isEmpty. Operand 4246 states and 18942 transitions. [2021-06-05 22:31:46,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:31:46,984 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:46,984 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:47,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-06-05 22:31:47,185 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:47,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:47,185 INFO L82 PathProgramCache]: Analyzing trace with hash -2134392128, now seen corresponding path program 25 times [2021-06-05 22:31:47,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:47,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533478539] [2021-06-05 22:31:47,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:47,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:47,436 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:47,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:47,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533478539] [2021-06-05 22:31:47,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533478539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:47,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082726590] [2021-06-05 22:31:47,437 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:47,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:47,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:31:47,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:47,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:31:47,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:31:47,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:31:47,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 22:31:47,664 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:47,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:47,671 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:47,671 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 22:31:47,737 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:47,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082726590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:47,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:47,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 22:31:47,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042480838] [2021-06-05 22:31:47,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:31:47,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:47,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:31:47,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:31:47,738 INFO L87 Difference]: Start difference. First operand 4246 states and 18942 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:48,272 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2021-06-05 22:31:48,655 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2021-06-05 22:31:48,777 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-06-05 22:31:49,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:49,555 INFO L93 Difference]: Finished difference Result 5065 states and 22182 transitions. [2021-06-05 22:31:49,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:31:49,555 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:31:49,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:49,565 INFO L225 Difference]: With dead ends: 5065 [2021-06-05 22:31:49,565 INFO L226 Difference]: Without dead ends: 4982 [2021-06-05 22:31:49,566 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 1375.8ms TimeCoverageRelationStatistics Valid=274, Invalid=1532, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:31:49,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4982 states. [2021-06-05 22:31:49,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4982 to 4237. [2021-06-05 22:31:49,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4237 states, 4236 states have (on average 4.462936732766761) internal successors, (18905), 4236 states have internal predecessors, (18905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:49,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4237 states to 4237 states and 18905 transitions. [2021-06-05 22:31:49,634 INFO L78 Accepts]: Start accepts. Automaton has 4237 states and 18905 transitions. Word has length 30 [2021-06-05 22:31:49,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:49,634 INFO L482 AbstractCegarLoop]: Abstraction has 4237 states and 18905 transitions. [2021-06-05 22:31:49,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:49,634 INFO L276 IsEmpty]: Start isEmpty. Operand 4237 states and 18905 transitions. [2021-06-05 22:31:49,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:31:49,641 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:49,641 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:49,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable262 [2021-06-05 22:31:49,841 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:49,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:49,841 INFO L82 PathProgramCache]: Analyzing trace with hash -840415508, now seen corresponding path program 26 times [2021-06-05 22:31:49,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:49,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614253510] [2021-06-05 22:31:49,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:49,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:50,087 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:50,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:50,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614253510] [2021-06-05 22:31:50,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614253510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:50,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895509293] [2021-06-05 22:31:50,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:50,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:31:50,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:50,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:31:50,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:50,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:31:50,388 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:50,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 33 [2021-06-05 22:31:50,393 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:31:50,444 INFO L628 ElimStorePlain]: treesize reduction 4, result has 92.9 percent of original size [2021-06-05 22:31:50,448 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:31:50,448 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:80 [2021-06-05 22:31:50,605 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:50,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895509293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:50,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:50,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 22:31:50,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901852207] [2021-06-05 22:31:50,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:31:50,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:50,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:31:50,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:31:50,606 INFO L87 Difference]: Start difference. First operand 4237 states and 18905 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:52,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:52,589 INFO L93 Difference]: Finished difference Result 5335 states and 23067 transitions. [2021-06-05 22:31:52,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 22:31:52,589 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:31:52,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:52,600 INFO L225 Difference]: With dead ends: 5335 [2021-06-05 22:31:52,600 INFO L226 Difference]: Without dead ends: 5117 [2021-06-05 22:31:52,600 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 1409.1ms TimeCoverageRelationStatistics Valid=268, Invalid=1624, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:31:52,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5117 states. [2021-06-05 22:31:52,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5117 to 4259. [2021-06-05 22:31:52,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4259 states, 4258 states have (on average 4.4678252700798495) internal successors, (19024), 4258 states have internal predecessors, (19024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:52,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4259 states to 4259 states and 19024 transitions. [2021-06-05 22:31:52,671 INFO L78 Accepts]: Start accepts. Automaton has 4259 states and 19024 transitions. Word has length 30 [2021-06-05 22:31:52,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:52,671 INFO L482 AbstractCegarLoop]: Abstraction has 4259 states and 19024 transitions. [2021-06-05 22:31:52,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:52,671 INFO L276 IsEmpty]: Start isEmpty. Operand 4259 states and 19024 transitions. [2021-06-05 22:31:52,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:31:52,677 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:52,677 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:52,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:52,877 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:52,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:52,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1505348430, now seen corresponding path program 21 times [2021-06-05 22:31:52,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:52,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109678228] [2021-06-05 22:31:52,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:52,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:53,077 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:53,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:53,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109678228] [2021-06-05 22:31:53,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109678228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:53,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194407992] [2021-06-05 22:31:53,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:53,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:31:53,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:53,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 22:31:53,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:53,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:31:53,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:31:53,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:31:53,408 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:53,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 43 [2021-06-05 22:31:53,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:31:53,452 INFO L628 ElimStorePlain]: treesize reduction 37, result has 52.6 percent of original size [2021-06-05 22:31:53,454 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:53,454 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:53, output treesize:50 [2021-06-05 22:31:53,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:53,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194407992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:53,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:53,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:31:53,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123974262] [2021-06-05 22:31:53,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:31:53,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:53,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:31:53,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:31:53,564 INFO L87 Difference]: Start difference. First operand 4259 states and 19024 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:55,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:55,605 INFO L93 Difference]: Finished difference Result 5095 states and 22084 transitions. [2021-06-05 22:31:55,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 22:31:55,606 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:31:55,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:55,615 INFO L225 Difference]: With dead ends: 5095 [2021-06-05 22:31:55,616 INFO L226 Difference]: Without dead ends: 4933 [2021-06-05 22:31:55,616 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1352.5ms TimeCoverageRelationStatistics Valid=283, Invalid=1973, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 22:31:55,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4933 states. [2021-06-05 22:31:55,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4933 to 4259. [2021-06-05 22:31:55,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4259 states, 4258 states have (on average 4.4678252700798495) internal successors, (19024), 4258 states have internal predecessors, (19024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:55,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4259 states to 4259 states and 19024 transitions. [2021-06-05 22:31:55,681 INFO L78 Accepts]: Start accepts. Automaton has 4259 states and 19024 transitions. Word has length 30 [2021-06-05 22:31:55,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:55,681 INFO L482 AbstractCegarLoop]: Abstraction has 4259 states and 19024 transitions. [2021-06-05 22:31:55,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:55,682 INFO L276 IsEmpty]: Start isEmpty. Operand 4259 states and 19024 transitions. [2021-06-05 22:31:55,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:31:55,688 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:55,688 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:55,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable271 [2021-06-05 22:31:55,888 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:55,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:55,889 INFO L82 PathProgramCache]: Analyzing trace with hash 565109348, now seen corresponding path program 22 times [2021-06-05 22:31:55,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:55,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725817057] [2021-06-05 22:31:55,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:55,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:56,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:56,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:56,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725817057] [2021-06-05 22:31:56,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725817057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:56,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73001876] [2021-06-05 22:31:56,131 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:56,166 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:31:56,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:56,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:31:56,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:56,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:31:56,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:31:56,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:31:56,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 22:31:56,378 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:56,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:56,384 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:56,385 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 22:31:56,435 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:56,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73001876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:56,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:56,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-05 22:31:56,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492435096] [2021-06-05 22:31:56,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:31:56,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:56,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:31:56,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:31:56,436 INFO L87 Difference]: Start difference. First operand 4259 states and 19024 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:57,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:57,658 INFO L93 Difference]: Finished difference Result 4880 states and 21466 transitions. [2021-06-05 22:31:57,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:31:57,659 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:31:57,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:57,668 INFO L225 Difference]: With dead ends: 4880 [2021-06-05 22:31:57,668 INFO L226 Difference]: Without dead ends: 4807 [2021-06-05 22:31:57,669 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 862.8ms TimeCoverageRelationStatistics Valid=134, Invalid=1056, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:31:57,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4807 states. [2021-06-05 22:31:57,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4807 to 4264. [2021-06-05 22:31:57,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4264 states, 4263 states have (on average 4.4677457189772465) internal successors, (19046), 4263 states have internal predecessors, (19046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:57,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4264 states to 4264 states and 19046 transitions. [2021-06-05 22:31:57,739 INFO L78 Accepts]: Start accepts. Automaton has 4264 states and 19046 transitions. Word has length 30 [2021-06-05 22:31:57,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:31:57,739 INFO L482 AbstractCegarLoop]: Abstraction has 4264 states and 19046 transitions. [2021-06-05 22:31:57,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:57,739 INFO L276 IsEmpty]: Start isEmpty. Operand 4264 states and 19046 transitions. [2021-06-05 22:31:57,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:31:57,746 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:31:57,746 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:31:57,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-06-05 22:31:57,946 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:31:57,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:31:57,946 INFO L82 PathProgramCache]: Analyzing trace with hash 32352366, now seen corresponding path program 23 times [2021-06-05 22:31:57,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:31:57,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245515570] [2021-06-05 22:31:57,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:31:57,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:31:58,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:58,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:31:58,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245515570] [2021-06-05 22:31:58,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245515570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:58,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107945019] [2021-06-05 22:31:58,232 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:31:58,268 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:31:58,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:31:58,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:31:58,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:31:58,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:31:58,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:31:58,533 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:58,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 45 [2021-06-05 22:31:58,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:31:58,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:31:58,577 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:31:58,577 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:239 [2021-06-05 22:31:58,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:31:58,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107945019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:31:58,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:31:58,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 22:31:58,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778196644] [2021-06-05 22:31:58,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:31:58,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:31:58,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:31:58,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:31:58,721 INFO L87 Difference]: Start difference. First operand 4264 states and 19046 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:31:59,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:31:59,980 INFO L93 Difference]: Finished difference Result 5027 states and 22179 transitions. [2021-06-05 22:31:59,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:31:59,981 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:31:59,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:31:59,991 INFO L225 Difference]: With dead ends: 5027 [2021-06-05 22:31:59,991 INFO L226 Difference]: Without dead ends: 4990 [2021-06-05 22:31:59,992 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1032.8ms TimeCoverageRelationStatistics Valid=171, Invalid=1389, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:31:59,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4990 states. [2021-06-05 22:32:00,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4990 to 4267. [2021-06-05 22:32:00,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4267 states, 4266 states have (on average 4.46671354899203) internal successors, (19055), 4266 states have internal predecessors, (19055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:00,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4267 states to 4267 states and 19055 transitions. [2021-06-05 22:32:00,058 INFO L78 Accepts]: Start accepts. Automaton has 4267 states and 19055 transitions. Word has length 30 [2021-06-05 22:32:00,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:00,058 INFO L482 AbstractCegarLoop]: Abstraction has 4267 states and 19055 transitions. [2021-06-05 22:32:00,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:00,058 INFO L276 IsEmpty]: Start isEmpty. Operand 4267 states and 19055 transitions. [2021-06-05 22:32:00,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:32:00,065 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:00,065 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:00,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-06-05 22:32:00,265 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:00,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:00,266 INFO L82 PathProgramCache]: Analyzing trace with hash 913886278, now seen corresponding path program 24 times [2021-06-05 22:32:00,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:00,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550893118] [2021-06-05 22:32:00,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:00,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:00,510 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:00,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:00,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550893118] [2021-06-05 22:32:00,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550893118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:00,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125727147] [2021-06-05 22:32:00,510 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:00,546 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:32:00,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:00,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:32:00,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:00,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:32:00,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:32:00,709 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:00,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 22:32:00,711 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:00,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:00,729 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:00,729 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:50 [2021-06-05 22:32:00,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:00,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125727147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:00,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:00,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:32:00,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873803906] [2021-06-05 22:32:00,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:32:00,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:00,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:32:00,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:32:00,928 INFO L87 Difference]: Start difference. First operand 4267 states and 19055 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:03,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:03,019 INFO L93 Difference]: Finished difference Result 5190 states and 22713 transitions. [2021-06-05 22:32:03,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 22:32:03,019 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:32:03,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:03,030 INFO L225 Difference]: With dead ends: 5190 [2021-06-05 22:32:03,031 INFO L226 Difference]: Without dead ends: 5093 [2021-06-05 22:32:03,031 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 1494.8ms TimeCoverageRelationStatistics Valid=254, Invalid=2098, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 22:32:03,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5093 states. [2021-06-05 22:32:03,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5093 to 4284. [2021-06-05 22:32:03,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4284 states, 4283 states have (on average 4.46439411627364) internal successors, (19121), 4283 states have internal predecessors, (19121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:03,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4284 states to 4284 states and 19121 transitions. [2021-06-05 22:32:03,098 INFO L78 Accepts]: Start accepts. Automaton has 4284 states and 19121 transitions. Word has length 30 [2021-06-05 22:32:03,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:03,098 INFO L482 AbstractCegarLoop]: Abstraction has 4284 states and 19121 transitions. [2021-06-05 22:32:03,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:03,098 INFO L276 IsEmpty]: Start isEmpty. Operand 4284 states and 19121 transitions. [2021-06-05 22:32:03,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:32:03,105 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:03,105 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:03,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable290 [2021-06-05 22:32:03,305 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:03,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:03,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1245689826, now seen corresponding path program 27 times [2021-06-05 22:32:03,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:03,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967222770] [2021-06-05 22:32:03,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:03,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:03,567 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:03,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:03,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967222770] [2021-06-05 22:32:03,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967222770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:03,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196765265] [2021-06-05 22:32:03,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:03,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:32:03,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:03,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:32:03,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:03,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:32:03,874 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:03,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 33 [2021-06-05 22:32:03,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:32:03,915 INFO L628 ElimStorePlain]: treesize reduction 4, result has 92.9 percent of original size [2021-06-05 22:32:03,919 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:32:03,919 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:80 [2021-06-05 22:32:04,098 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:04,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196765265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:04,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:04,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 22:32:04,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786667691] [2021-06-05 22:32:04,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:32:04,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:04,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:32:04,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:32:04,099 INFO L87 Difference]: Start difference. First operand 4284 states and 19121 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:06,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:06,095 INFO L93 Difference]: Finished difference Result 5631 states and 24074 transitions. [2021-06-05 22:32:06,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 22:32:06,096 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:32:06,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:06,107 INFO L225 Difference]: With dead ends: 5631 [2021-06-05 22:32:06,107 INFO L226 Difference]: Without dead ends: 5413 [2021-06-05 22:32:06,107 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 1612.1ms TimeCoverageRelationStatistics Valid=288, Invalid=1874, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 22:32:06,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5413 states. [2021-06-05 22:32:06,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5413 to 4304. [2021-06-05 22:32:06,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4304 states, 4303 states have (on average 4.466186381594237) internal successors, (19218), 4303 states have internal predecessors, (19218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:06,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4304 states to 4304 states and 19218 transitions. [2021-06-05 22:32:06,183 INFO L78 Accepts]: Start accepts. Automaton has 4304 states and 19218 transitions. Word has length 30 [2021-06-05 22:32:06,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:06,183 INFO L482 AbstractCegarLoop]: Abstraction has 4304 states and 19218 transitions. [2021-06-05 22:32:06,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:06,183 INFO L276 IsEmpty]: Start isEmpty. Operand 4304 states and 19218 transitions. [2021-06-05 22:32:06,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:32:06,189 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:06,189 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:06,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:06,390 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:06,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:06,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1910622748, now seen corresponding path program 25 times [2021-06-05 22:32:06,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:06,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876661270] [2021-06-05 22:32:06,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:06,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:06,587 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:06,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:06,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876661270] [2021-06-05 22:32:06,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876661270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:06,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603432218] [2021-06-05 22:32:06,587 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:06,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:06,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:32:06,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:06,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:32:06,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:32:06,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:32:06,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 22:32:06,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:06,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:06,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:06,854 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:11 [2021-06-05 22:32:06,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:06,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603432218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:06,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:06,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 22:32:06,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556544083] [2021-06-05 22:32:06,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:32:06,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:06,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:32:06,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:32:06,897 INFO L87 Difference]: Start difference. First operand 4304 states and 19218 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:08,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:08,168 INFO L93 Difference]: Finished difference Result 5375 states and 23515 transitions. [2021-06-05 22:32:08,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:32:08,168 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:32:08,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:08,180 INFO L225 Difference]: With dead ends: 5375 [2021-06-05 22:32:08,180 INFO L226 Difference]: Without dead ends: 5284 [2021-06-05 22:32:08,180 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 772.0ms TimeCoverageRelationStatistics Valid=197, Invalid=1285, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:32:08,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5284 states. [2021-06-05 22:32:08,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5284 to 4316. [2021-06-05 22:32:08,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4316 states, 4315 states have (on average 4.464426419466975) internal successors, (19264), 4315 states have internal predecessors, (19264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:08,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4316 states to 4316 states and 19264 transitions. [2021-06-05 22:32:08,256 INFO L78 Accepts]: Start accepts. Automaton has 4316 states and 19264 transitions. Word has length 30 [2021-06-05 22:32:08,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:08,256 INFO L482 AbstractCegarLoop]: Abstraction has 4316 states and 19264 transitions. [2021-06-05 22:32:08,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:08,256 INFO L276 IsEmpty]: Start isEmpty. Operand 4316 states and 19264 transitions. [2021-06-05 22:32:08,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:32:08,262 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:08,262 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:08,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2021-06-05 22:32:08,463 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:08,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:08,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1678906080, now seen corresponding path program 26 times [2021-06-05 22:32:08,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:08,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951854070] [2021-06-05 22:32:08,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:08,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:08,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:08,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:08,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951854070] [2021-06-05 22:32:08,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951854070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:08,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380021853] [2021-06-05 22:32:08,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:08,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:32:08,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:08,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 22:32:08,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:08,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:32:08,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:32:08,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:32:08,962 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:08,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2021-06-05 22:32:08,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:32:08,991 INFO L628 ElimStorePlain]: treesize reduction 29, result has 52.5 percent of original size [2021-06-05 22:32:08,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:08,994 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:21 [2021-06-05 22:32:09,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:09,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380021853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:09,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:09,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:32:09,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964571323] [2021-06-05 22:32:09,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:32:09,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:09,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:32:09,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:32:09,094 INFO L87 Difference]: Start difference. First operand 4316 states and 19264 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:10,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:10,808 INFO L93 Difference]: Finished difference Result 5842 states and 25410 transitions. [2021-06-05 22:32:10,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 22:32:10,808 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:32:10,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:10,820 INFO L225 Difference]: With dead ends: 5842 [2021-06-05 22:32:10,820 INFO L226 Difference]: Without dead ends: 5705 [2021-06-05 22:32:10,820 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 1199.6ms TimeCoverageRelationStatistics Valid=434, Invalid=2322, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 22:32:10,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5705 states. [2021-06-05 22:32:10,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5705 to 4349. [2021-06-05 22:32:10,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4349 states, 4348 states have (on average 4.459521619135234) internal successors, (19390), 4348 states have internal predecessors, (19390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:10,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4349 states to 4349 states and 19390 transitions. [2021-06-05 22:32:10,893 INFO L78 Accepts]: Start accepts. Automaton has 4349 states and 19390 transitions. Word has length 30 [2021-06-05 22:32:10,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:10,893 INFO L482 AbstractCegarLoop]: Abstraction has 4349 states and 19390 transitions. [2021-06-05 22:32:10,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:10,893 INFO L276 IsEmpty]: Start isEmpty. Operand 4349 states and 19390 transitions. [2021-06-05 22:32:10,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:32:10,899 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:10,899 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:11,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable304,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:11,100 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:11,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:11,100 INFO L82 PathProgramCache]: Analyzing trace with hash 2109714950, now seen corresponding path program 27 times [2021-06-05 22:32:11,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:11,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249448495] [2021-06-05 22:32:11,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:11,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:11,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:11,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:11,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249448495] [2021-06-05 22:32:11,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249448495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:11,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223436858] [2021-06-05 22:32:11,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:11,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:32:11,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:11,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 22:32:11,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:11,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:32:11,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:32:11,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:32:11,604 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:11,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 43 [2021-06-05 22:32:11,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 22:32:11,643 INFO L628 ElimStorePlain]: treesize reduction 31, result has 57.5 percent of original size [2021-06-05 22:32:11,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:11,649 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:44 [2021-06-05 22:32:11,780 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:11,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223436858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:11,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:11,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:32:11,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123885928] [2021-06-05 22:32:11,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:32:11,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:11,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:32:11,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:32:11,781 INFO L87 Difference]: Start difference. First operand 4349 states and 19390 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:13,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:13,726 INFO L93 Difference]: Finished difference Result 5104 states and 22142 transitions. [2021-06-05 22:32:13,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 22:32:13,727 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:32:13,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:13,737 INFO L225 Difference]: With dead ends: 5104 [2021-06-05 22:32:13,737 INFO L226 Difference]: Without dead ends: 4942 [2021-06-05 22:32:13,737 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 1310.6ms TimeCoverageRelationStatistics Valid=289, Invalid=1873, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 22:32:13,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4942 states. [2021-06-05 22:32:13,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4942 to 4339. [2021-06-05 22:32:13,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4339 states, 4338 states have (on average 4.461041954817889) internal successors, (19352), 4338 states have internal predecessors, (19352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:13,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4339 states to 4339 states and 19352 transitions. [2021-06-05 22:32:13,804 INFO L78 Accepts]: Start accepts. Automaton has 4339 states and 19352 transitions. Word has length 30 [2021-06-05 22:32:13,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:13,804 INFO L482 AbstractCegarLoop]: Abstraction has 4339 states and 19352 transitions. [2021-06-05 22:32:13,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:13,804 INFO L276 IsEmpty]: Start isEmpty. Operand 4339 states and 19352 transitions. [2021-06-05 22:32:13,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:32:13,810 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:13,810 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:14,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:14,011 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:14,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:14,011 INFO L82 PathProgramCache]: Analyzing trace with hash -836008190, now seen corresponding path program 28 times [2021-06-05 22:32:14,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:14,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849869819] [2021-06-05 22:32:14,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:14,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:14,259 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:14,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:14,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849869819] [2021-06-05 22:32:14,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849869819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:14,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712856900] [2021-06-05 22:32:14,260 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:14,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:32:14,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:14,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:32:14,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:14,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:32:14,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:32:14,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:32:14,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 22:32:14,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:14,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:14,451 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:14,451 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-05 22:32:14,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:14,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712856900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:14,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:14,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-05 22:32:14,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429231808] [2021-06-05 22:32:14,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:32:14,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:14,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:32:14,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:32:14,522 INFO L87 Difference]: Start difference. First operand 4339 states and 19352 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:15,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:15,654 INFO L93 Difference]: Finished difference Result 4835 states and 21285 transitions. [2021-06-05 22:32:15,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:32:15,655 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:32:15,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:15,664 INFO L225 Difference]: With dead ends: 4835 [2021-06-05 22:32:15,664 INFO L226 Difference]: Without dead ends: 4762 [2021-06-05 22:32:15,664 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 875.9ms TimeCoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:32:15,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4762 states. [2021-06-05 22:32:15,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4762 to 4351. [2021-06-05 22:32:15,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4351 states, 4350 states have (on average 4.46) internal successors, (19401), 4350 states have internal predecessors, (19401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:15,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4351 states to 4351 states and 19401 transitions. [2021-06-05 22:32:15,736 INFO L78 Accepts]: Start accepts. Automaton has 4351 states and 19401 transitions. Word has length 30 [2021-06-05 22:32:15,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:15,736 INFO L482 AbstractCegarLoop]: Abstraction has 4351 states and 19401 transitions. [2021-06-05 22:32:15,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:15,736 INFO L276 IsEmpty]: Start isEmpty. Operand 4351 states and 19401 transitions. [2021-06-05 22:32:15,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:32:15,743 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:15,743 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:15,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2021-06-05 22:32:15,943 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:15,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:15,944 INFO L82 PathProgramCache]: Analyzing trace with hash 2063372030, now seen corresponding path program 29 times [2021-06-05 22:32:15,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:15,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410329521] [2021-06-05 22:32:15,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:15,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:16,161 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:16,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:16,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410329521] [2021-06-05 22:32:16,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410329521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:16,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815038841] [2021-06-05 22:32:16,161 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:16,196 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:32:16,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:16,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:32:16,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:16,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:32:16,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:32:16,366 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:16,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-06-05 22:32:16,367 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:16,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:16,400 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:16,400 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:220 [2021-06-05 22:32:16,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:16,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815038841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:16,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:16,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:32:16,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866475455] [2021-06-05 22:32:16,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:32:16,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:16,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:32:16,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:32:16,614 INFO L87 Difference]: Start difference. First operand 4351 states and 19401 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:18,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:18,097 INFO L93 Difference]: Finished difference Result 5039 states and 22207 transitions. [2021-06-05 22:32:18,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:32:18,098 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:32:18,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:18,108 INFO L225 Difference]: With dead ends: 5039 [2021-06-05 22:32:18,108 INFO L226 Difference]: Without dead ends: 4976 [2021-06-05 22:32:18,108 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 1183.7ms TimeCoverageRelationStatistics Valid=230, Invalid=1576, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:32:18,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4976 states. [2021-06-05 22:32:18,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4976 to 4352. [2021-06-05 22:32:18,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4352 states, 4351 states have (on average 4.459664444955183) internal successors, (19404), 4351 states have internal predecessors, (19404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:18,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4352 states to 4352 states and 19404 transitions. [2021-06-05 22:32:18,174 INFO L78 Accepts]: Start accepts. Automaton has 4352 states and 19404 transitions. Word has length 30 [2021-06-05 22:32:18,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:18,175 INFO L482 AbstractCegarLoop]: Abstraction has 4352 states and 19404 transitions. [2021-06-05 22:32:18,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:18,175 INFO L276 IsEmpty]: Start isEmpty. Operand 4352 states and 19404 transitions. [2021-06-05 22:32:18,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:32:18,181 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:18,181 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:18,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable316,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:18,382 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:18,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:18,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1699668444, now seen corresponding path program 30 times [2021-06-05 22:32:18,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:18,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901843740] [2021-06-05 22:32:18,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:18,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:18,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:18,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:18,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901843740] [2021-06-05 22:32:18,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901843740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:18,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085465317] [2021-06-05 22:32:18,635 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:18,671 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:32:18,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:18,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:32:18,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:18,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:32:18,862 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:18,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-06-05 22:32:18,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:18,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:18,882 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:18,882 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:43 [2021-06-05 22:32:19,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:19,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085465317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:19,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:19,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 22:32:19,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594094805] [2021-06-05 22:32:19,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:32:19,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:19,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:32:19,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:32:19,106 INFO L87 Difference]: Start difference. First operand 4352 states and 19404 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:21,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:21,305 INFO L93 Difference]: Finished difference Result 4881 states and 21439 transitions. [2021-06-05 22:32:21,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:32:21,305 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:32:21,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:21,315 INFO L225 Difference]: With dead ends: 4881 [2021-06-05 22:32:21,315 INFO L226 Difference]: Without dead ends: 4791 [2021-06-05 22:32:21,316 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1424.8ms TimeCoverageRelationStatistics Valid=161, Invalid=1479, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:32:21,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4791 states. [2021-06-05 22:32:21,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4791 to 4357. [2021-06-05 22:32:21,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4357 states, 4356 states have (on average 4.459595959595959) internal successors, (19426), 4356 states have internal predecessors, (19426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:21,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4357 states to 4357 states and 19426 transitions. [2021-06-05 22:32:21,384 INFO L78 Accepts]: Start accepts. Automaton has 4357 states and 19426 transitions. Word has length 30 [2021-06-05 22:32:21,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:21,384 INFO L482 AbstractCegarLoop]: Abstraction has 4357 states and 19426 transitions. [2021-06-05 22:32:21,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:21,384 INFO L276 IsEmpty]: Start isEmpty. Operand 4357 states and 19426 transitions. [2021-06-05 22:32:21,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:32:21,391 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:21,391 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:21,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable324 [2021-06-05 22:32:21,591 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:21,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:21,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1166911462, now seen corresponding path program 31 times [2021-06-05 22:32:21,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:21,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283587822] [2021-06-05 22:32:21,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:21,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:21,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:21,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:21,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283587822] [2021-06-05 22:32:21,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283587822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:21,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861599335] [2021-06-05 22:32:21,829 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:21,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:21,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:32:21,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:22,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:32:22,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:32:22,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:32:22,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 22:32:22,014 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:22,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:22,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:22,022 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-05 22:32:22,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:22,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861599335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:22,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:22,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 20 [2021-06-05 22:32:22,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746101655] [2021-06-05 22:32:22,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:32:22,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:22,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:32:22,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:32:22,087 INFO L87 Difference]: Start difference. First operand 4357 states and 19426 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:22,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:22,860 INFO L93 Difference]: Finished difference Result 4973 states and 21853 transitions. [2021-06-05 22:32:22,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:32:22,860 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:32:22,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:22,870 INFO L225 Difference]: With dead ends: 4973 [2021-06-05 22:32:22,870 INFO L226 Difference]: Without dead ends: 4899 [2021-06-05 22:32:22,870 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 560.4ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:32:22,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4899 states. [2021-06-05 22:32:22,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4899 to 4352. [2021-06-05 22:32:22,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4352 states, 4351 states have (on average 4.459664444955183) internal successors, (19404), 4351 states have internal predecessors, (19404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:22,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4352 states to 4352 states and 19404 transitions. [2021-06-05 22:32:22,936 INFO L78 Accepts]: Start accepts. Automaton has 4352 states and 19404 transitions. Word has length 30 [2021-06-05 22:32:22,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:22,936 INFO L482 AbstractCegarLoop]: Abstraction has 4352 states and 19404 transitions. [2021-06-05 22:32:22,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:22,936 INFO L276 IsEmpty]: Start isEmpty. Operand 4352 states and 19404 transitions. [2021-06-05 22:32:22,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:32:22,942 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:22,942 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:23,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:23,143 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:23,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:23,143 INFO L82 PathProgramCache]: Analyzing trace with hash -678823322, now seen corresponding path program 32 times [2021-06-05 22:32:23,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:23,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913886555] [2021-06-05 22:32:23,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:23,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:23,364 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:23,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:23,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913886555] [2021-06-05 22:32:23,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913886555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:23,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526631518] [2021-06-05 22:32:23,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:23,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:32:23,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:23,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:32:23,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:23,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:32:23,558 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:23,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-06-05 22:32:23,559 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:23,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:23,586 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:23,586 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:69 [2021-06-05 22:32:23,842 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:23,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526631518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:23,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:23,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 22:32:23,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110058858] [2021-06-05 22:32:23,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:32:23,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:23,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:32:23,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:32:23,843 INFO L87 Difference]: Start difference. First operand 4352 states and 19404 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:25,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:25,866 INFO L93 Difference]: Finished difference Result 4883 states and 21378 transitions. [2021-06-05 22:32:25,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:32:25,866 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:32:25,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:25,876 INFO L225 Difference]: With dead ends: 4883 [2021-06-05 22:32:25,877 INFO L226 Difference]: Without dead ends: 4786 [2021-06-05 22:32:25,877 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 1593.9ms TimeCoverageRelationStatistics Valid=254, Invalid=1638, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:32:25,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4786 states. [2021-06-05 22:32:25,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4786 to 4354. [2021-06-05 22:32:25,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4354 states, 4353 states have (on average 4.4601424305076955) internal successors, (19415), 4353 states have internal predecessors, (19415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:25,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4354 states to 4354 states and 19415 transitions. [2021-06-05 22:32:25,944 INFO L78 Accepts]: Start accepts. Automaton has 4354 states and 19415 transitions. Word has length 30 [2021-06-05 22:32:25,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:25,945 INFO L482 AbstractCegarLoop]: Abstraction has 4354 states and 19415 transitions. [2021-06-05 22:32:25,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:25,945 INFO L276 IsEmpty]: Start isEmpty. Operand 4354 states and 19415 transitions. [2021-06-05 22:32:25,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:32:25,951 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:25,951 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:26,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable330 [2021-06-05 22:32:26,152 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:26,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:26,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1065540684, now seen corresponding path program 33 times [2021-06-05 22:32:26,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:26,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140975899] [2021-06-05 22:32:26,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:26,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:26,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:26,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:26,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140975899] [2021-06-05 22:32:26,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140975899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:26,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225753205] [2021-06-05 22:32:26,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:26,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:32:26,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:26,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:32:26,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:26,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:32:26,636 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:26,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-06-05 22:32:26,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:26,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:26,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:26,655 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:69 [2021-06-05 22:32:26,920 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:26,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225753205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:26,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:26,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 22:32:26,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603101968] [2021-06-05 22:32:26,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:32:26,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:26,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:32:26,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:32:26,920 INFO L87 Difference]: Start difference. First operand 4354 states and 19415 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:29,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:29,153 INFO L93 Difference]: Finished difference Result 4807 states and 21085 transitions. [2021-06-05 22:32:29,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:32:29,154 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:32:29,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:29,162 INFO L225 Difference]: With dead ends: 4807 [2021-06-05 22:32:29,162 INFO L226 Difference]: Without dead ends: 4726 [2021-06-05 22:32:29,163 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1637.7ms TimeCoverageRelationStatistics Valid=188, Invalid=1452, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:32:29,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4726 states. [2021-06-05 22:32:29,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4726 to 4350. [2021-06-05 22:32:29,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4350 states, 4349 states have (on average 4.460335709358473) internal successors, (19398), 4349 states have internal predecessors, (19398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:29,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4350 states to 4350 states and 19398 transitions. [2021-06-05 22:32:29,225 INFO L78 Accepts]: Start accepts. Automaton has 4350 states and 19398 transitions. Word has length 30 [2021-06-05 22:32:29,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:29,226 INFO L482 AbstractCegarLoop]: Abstraction has 4350 states and 19398 transitions. [2021-06-05 22:32:29,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:29,226 INFO L276 IsEmpty]: Start isEmpty. Operand 4350 states and 19398 transitions. [2021-06-05 22:32:29,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:32:29,232 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:29,232 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:29,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable337,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:29,433 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:29,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:29,433 INFO L82 PathProgramCache]: Analyzing trace with hash 254880366, now seen corresponding path program 34 times [2021-06-05 22:32:29,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:29,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924927952] [2021-06-05 22:32:29,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:29,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:29,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:29,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:29,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924927952] [2021-06-05 22:32:29,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924927952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:29,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515413573] [2021-06-05 22:32:29,649 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:29,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:32:29,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:29,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:32:29,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:29,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:32:29,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:32:29,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:32:29,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 22:32:29,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:29,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:29,865 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:29,865 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 22:32:29,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:29,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515413573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:29,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:29,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 20 [2021-06-05 22:32:29,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276540971] [2021-06-05 22:32:29,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:32:29,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:29,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:32:29,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:32:29,896 INFO L87 Difference]: Start difference. First operand 4350 states and 19398 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:30,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:30,974 INFO L93 Difference]: Finished difference Result 5100 states and 22309 transitions. [2021-06-05 22:32:30,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 22:32:30,974 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:32:30,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:30,984 INFO L225 Difference]: With dead ends: 5100 [2021-06-05 22:32:30,984 INFO L226 Difference]: Without dead ends: 5043 [2021-06-05 22:32:30,984 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 704.2ms TimeCoverageRelationStatistics Valid=147, Invalid=975, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:32:30,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5043 states. [2021-06-05 22:32:31,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5043 to 4351. [2021-06-05 22:32:31,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4351 states, 4350 states have (on average 4.465287356321839) internal successors, (19424), 4350 states have internal predecessors, (19424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:31,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4351 states to 4351 states and 19424 transitions. [2021-06-05 22:32:31,054 INFO L78 Accepts]: Start accepts. Automaton has 4351 states and 19424 transitions. Word has length 30 [2021-06-05 22:32:31,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:31,054 INFO L482 AbstractCegarLoop]: Abstraction has 4351 states and 19424 transitions. [2021-06-05 22:32:31,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:31,054 INFO L276 IsEmpty]: Start isEmpty. Operand 4351 states and 19424 transitions. [2021-06-05 22:32:31,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:32:31,061 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:31,061 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:31,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2021-06-05 22:32:31,261 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:31,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:31,261 INFO L82 PathProgramCache]: Analyzing trace with hash 969357380, now seen corresponding path program 35 times [2021-06-05 22:32:31,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:31,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744802622] [2021-06-05 22:32:31,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:31,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:31,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:31,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:31,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744802622] [2021-06-05 22:32:31,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744802622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:31,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380328979] [2021-06-05 22:32:31,483 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:31,518 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:32:31,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:31,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:32:31,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:31,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:32:31,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:32:31,679 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:31,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-06-05 22:32:31,680 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:31,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:31,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:31,709 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:220 [2021-06-05 22:32:31,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:31,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380328979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:31,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:31,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:32:31,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951718685] [2021-06-05 22:32:31,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:32:31,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:31,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:32:31,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:32:31,935 INFO L87 Difference]: Start difference. First operand 4351 states and 19424 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:32,806 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2021-06-05 22:32:33,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:33,594 INFO L93 Difference]: Finished difference Result 5082 states and 22380 transitions. [2021-06-05 22:32:33,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 22:32:33,595 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:32:33,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:33,605 INFO L225 Difference]: With dead ends: 5082 [2021-06-05 22:32:33,605 INFO L226 Difference]: Without dead ends: 5019 [2021-06-05 22:32:33,606 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1356.1ms TimeCoverageRelationStatistics Valid=256, Invalid=1814, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 22:32:33,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5019 states. [2021-06-05 22:32:33,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5019 to 4350. [2021-06-05 22:32:33,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4350 states, 4349 states have (on average 4.46562428144401) internal successors, (19421), 4349 states have internal predecessors, (19421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:33,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4350 states to 4350 states and 19421 transitions. [2021-06-05 22:32:33,675 INFO L78 Accepts]: Start accepts. Automaton has 4350 states and 19421 transitions. Word has length 30 [2021-06-05 22:32:33,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:33,675 INFO L482 AbstractCegarLoop]: Abstraction has 4350 states and 19421 transitions. [2021-06-05 22:32:33,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:33,675 INFO L276 IsEmpty]: Start isEmpty. Operand 4350 states and 19421 transitions. [2021-06-05 22:32:33,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:32:33,681 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:33,681 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:33,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2021-06-05 22:32:33,885 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:33,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:33,885 INFO L82 PathProgramCache]: Analyzing trace with hash -2111173892, now seen corresponding path program 36 times [2021-06-05 22:32:33,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:33,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320829787] [2021-06-05 22:32:33,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:33,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:34,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:34,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:34,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320829787] [2021-06-05 22:32:34,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320829787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:34,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249000144] [2021-06-05 22:32:34,131 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:34,168 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:32:34,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:34,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:32:34,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:34,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:32:34,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:32:34,294 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:34,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 22:32:34,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:34,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:34,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:34,317 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:53 [2021-06-05 22:32:34,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:34,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249000144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:34,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:34,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 22:32:34,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234453600] [2021-06-05 22:32:34,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:32:34,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:34,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:32:34,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:32:34,500 INFO L87 Difference]: Start difference. First operand 4350 states and 19421 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:36,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:36,072 INFO L93 Difference]: Finished difference Result 5611 states and 24398 transitions. [2021-06-05 22:32:36,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 22:32:36,072 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:32:36,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:36,083 INFO L225 Difference]: With dead ends: 5611 [2021-06-05 22:32:36,083 INFO L226 Difference]: Without dead ends: 5512 [2021-06-05 22:32:36,083 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1150.9ms TimeCoverageRelationStatistics Valid=253, Invalid=1727, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:32:36,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5512 states. [2021-06-05 22:32:36,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5512 to 4338. [2021-06-05 22:32:36,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4338 states, 4337 states have (on average 4.466682038275305) internal successors, (19372), 4337 states have internal predecessors, (19372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:36,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4338 states to 4338 states and 19372 transitions. [2021-06-05 22:32:36,162 INFO L78 Accepts]: Start accepts. Automaton has 4338 states and 19372 transitions. Word has length 30 [2021-06-05 22:32:36,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:36,162 INFO L482 AbstractCegarLoop]: Abstraction has 4338 states and 19372 transitions. [2021-06-05 22:32:36,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:36,162 INFO L276 IsEmpty]: Start isEmpty. Operand 4338 states and 19372 transitions. [2021-06-05 22:32:36,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:32:36,168 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:36,169 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:36,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable353 [2021-06-05 22:32:36,369 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:36,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:36,369 INFO L82 PathProgramCache]: Analyzing trace with hash -895800388, now seen corresponding path program 1 times [2021-06-05 22:32:36,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:36,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800576696] [2021-06-05 22:32:36,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:36,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:36,517 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:36,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:36,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800576696] [2021-06-05 22:32:36,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800576696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:36,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846377141] [2021-06-05 22:32:36,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:36,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:36,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:32:36,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:36,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:32:36,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:36,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:36,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:36,676 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:32:36,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:36,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846377141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:36,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:36,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:32:36,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103443739] [2021-06-05 22:32:36,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:32:36,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:36,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:32:36,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:32:36,725 INFO L87 Difference]: Start difference. First operand 4338 states and 19372 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:38,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:38,082 INFO L93 Difference]: Finished difference Result 5698 states and 24891 transitions. [2021-06-05 22:32:38,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:32:38,082 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:32:38,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:38,093 INFO L225 Difference]: With dead ends: 5698 [2021-06-05 22:32:38,093 INFO L226 Difference]: Without dead ends: 5616 [2021-06-05 22:32:38,093 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 911.5ms TimeCoverageRelationStatistics Valid=280, Invalid=1526, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:32:38,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5616 states. [2021-06-05 22:32:38,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5616 to 4370. [2021-06-05 22:32:38,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4370 states, 4369 states have (on average 4.465552758068208) internal successors, (19510), 4369 states have internal predecessors, (19510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:38,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4370 states to 4370 states and 19510 transitions. [2021-06-05 22:32:38,165 INFO L78 Accepts]: Start accepts. Automaton has 4370 states and 19510 transitions. Word has length 30 [2021-06-05 22:32:38,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:38,165 INFO L482 AbstractCegarLoop]: Abstraction has 4370 states and 19510 transitions. [2021-06-05 22:32:38,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:38,165 INFO L276 IsEmpty]: Start isEmpty. Operand 4370 states and 19510 transitions. [2021-06-05 22:32:38,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:32:38,172 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:38,172 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:38,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable358 [2021-06-05 22:32:38,372 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:38,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:38,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1616233856, now seen corresponding path program 2 times [2021-06-05 22:32:38,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:38,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14013840] [2021-06-05 22:32:38,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:38,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:38,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:38,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:38,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14013840] [2021-06-05 22:32:38,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14013840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:38,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570018250] [2021-06-05 22:32:38,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:38,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:32:38,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:38,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:32:38,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:38,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:32:38,676 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:38,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:38,679 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:38,679 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:32:38,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:38,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570018250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:38,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:38,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:32:38,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835737279] [2021-06-05 22:32:38,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:32:38,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:38,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:32:38,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:32:38,741 INFO L87 Difference]: Start difference. First operand 4370 states and 19510 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:40,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:40,127 INFO L93 Difference]: Finished difference Result 5938 states and 25890 transitions. [2021-06-05 22:32:40,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 22:32:40,127 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:32:40,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:40,139 INFO L225 Difference]: With dead ends: 5938 [2021-06-05 22:32:40,139 INFO L226 Difference]: Without dead ends: 5865 [2021-06-05 22:32:40,139 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 978.8ms TimeCoverageRelationStatistics Valid=385, Invalid=1871, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 22:32:40,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5865 states. [2021-06-05 22:32:40,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5865 to 4363. [2021-06-05 22:32:40,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4363 states, 4362 states have (on average 4.466758367721229) internal successors, (19484), 4362 states have internal predecessors, (19484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:40,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4363 states to 4363 states and 19484 transitions. [2021-06-05 22:32:40,216 INFO L78 Accepts]: Start accepts. Automaton has 4363 states and 19484 transitions. Word has length 30 [2021-06-05 22:32:40,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:40,216 INFO L482 AbstractCegarLoop]: Abstraction has 4363 states and 19484 transitions. [2021-06-05 22:32:40,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:40,216 INFO L276 IsEmpty]: Start isEmpty. Operand 4363 states and 19484 transitions. [2021-06-05 22:32:40,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:32:40,223 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:40,223 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:40,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable359 [2021-06-05 22:32:40,424 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:40,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:40,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1480628418, now seen corresponding path program 3 times [2021-06-05 22:32:40,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:40,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991553487] [2021-06-05 22:32:40,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:40,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:40,585 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:40,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:40,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991553487] [2021-06-05 22:32:40,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991553487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:40,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217664832] [2021-06-05 22:32:40,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:40,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:32:40,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:40,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:32:40,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:40,817 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:40,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 22:32:40,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:40,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:40,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:40,828 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 22:32:40,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:40,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217664832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:40,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:40,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 22:32:40,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883899824] [2021-06-05 22:32:40,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:32:40,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:40,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:32:40,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:32:40,897 INFO L87 Difference]: Start difference. First operand 4363 states and 19484 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:43,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:43,257 INFO L93 Difference]: Finished difference Result 6271 states and 26892 transitions. [2021-06-05 22:32:43,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 22:32:43,257 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:32:43,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:43,269 INFO L225 Difference]: With dead ends: 6271 [2021-06-05 22:32:43,269 INFO L226 Difference]: Without dead ends: 6040 [2021-06-05 22:32:43,270 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 1661.5ms TimeCoverageRelationStatistics Valid=511, Invalid=2681, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 22:32:43,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6040 states. [2021-06-05 22:32:43,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6040 to 4371. [2021-06-05 22:32:43,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4371 states, 4370 states have (on average 4.467276887871853) internal successors, (19522), 4370 states have internal predecessors, (19522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:43,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4371 states to 4371 states and 19522 transitions. [2021-06-05 22:32:43,345 INFO L78 Accepts]: Start accepts. Automaton has 4371 states and 19522 transitions. Word has length 30 [2021-06-05 22:32:43,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:43,345 INFO L482 AbstractCegarLoop]: Abstraction has 4371 states and 19522 transitions. [2021-06-05 22:32:43,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:43,345 INFO L276 IsEmpty]: Start isEmpty. Operand 4371 states and 19522 transitions. [2021-06-05 22:32:43,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:32:43,351 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:43,351 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:43,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:43,552 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:43,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:43,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1509599484, now seen corresponding path program 1 times [2021-06-05 22:32:43,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:43,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680387011] [2021-06-05 22:32:43,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:43,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:43,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:43,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:43,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680387011] [2021-06-05 22:32:43,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680387011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:43,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698481617] [2021-06-05 22:32:43,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:43,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:43,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:32:43,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:43,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 22:32:43,920 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:43,922 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:43,922 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:43,922 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 22:32:43,967 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:43,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698481617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:43,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:43,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:32:43,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600342586] [2021-06-05 22:32:43,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:32:43,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:43,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:32:43,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:32:43,968 INFO L87 Difference]: Start difference. First operand 4371 states and 19522 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:45,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:45,764 INFO L93 Difference]: Finished difference Result 5842 states and 25460 transitions. [2021-06-05 22:32:45,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 22:32:45,765 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:32:45,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:45,777 INFO L225 Difference]: With dead ends: 5842 [2021-06-05 22:32:45,777 INFO L226 Difference]: Without dead ends: 5690 [2021-06-05 22:32:45,777 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 1144.4ms TimeCoverageRelationStatistics Valid=348, Invalid=1908, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 22:32:45,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5690 states. [2021-06-05 22:32:45,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5690 to 4371. [2021-06-05 22:32:45,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4371 states, 4370 states have (on average 4.467276887871853) internal successors, (19522), 4370 states have internal predecessors, (19522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:45,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4371 states to 4371 states and 19522 transitions. [2021-06-05 22:32:45,851 INFO L78 Accepts]: Start accepts. Automaton has 4371 states and 19522 transitions. Word has length 30 [2021-06-05 22:32:45,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:45,852 INFO L482 AbstractCegarLoop]: Abstraction has 4371 states and 19522 transitions. [2021-06-05 22:32:45,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:45,852 INFO L276 IsEmpty]: Start isEmpty. Operand 4371 states and 19522 transitions. [2021-06-05 22:32:45,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:32:45,858 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:45,858 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:46,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:46,059 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:46,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:46,059 INFO L82 PathProgramCache]: Analyzing trace with hash -692523458, now seen corresponding path program 2 times [2021-06-05 22:32:46,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:46,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607107301] [2021-06-05 22:32:46,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:46,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:46,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:46,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:46,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607107301] [2021-06-05 22:32:46,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607107301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:46,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550845575] [2021-06-05 22:32:46,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:46,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:32:46,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:46,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:32:46,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:46,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:32:46,356 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:46,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:46,359 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:46,359 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:32:46,405 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:46,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550845575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:46,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:46,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:32:46,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637660680] [2021-06-05 22:32:46,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:32:46,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:46,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:32:46,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:32:46,406 INFO L87 Difference]: Start difference. First operand 4371 states and 19522 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:47,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:47,984 INFO L93 Difference]: Finished difference Result 5490 states and 24064 transitions. [2021-06-05 22:32:47,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:32:47,985 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:32:47,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:47,996 INFO L225 Difference]: With dead ends: 5490 [2021-06-05 22:32:47,996 INFO L226 Difference]: Without dead ends: 5417 [2021-06-05 22:32:47,996 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1101.8ms TimeCoverageRelationStatistics Valid=274, Invalid=1532, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:32:48,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5417 states. [2021-06-05 22:32:48,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5417 to 4380. [2021-06-05 22:32:48,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4380 states, 4379 states have (on average 4.466773235898607) internal successors, (19560), 4379 states have internal predecessors, (19560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:48,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4380 states to 4380 states and 19560 transitions. [2021-06-05 22:32:48,071 INFO L78 Accepts]: Start accepts. Automaton has 4380 states and 19560 transitions. Word has length 30 [2021-06-05 22:32:48,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:48,071 INFO L482 AbstractCegarLoop]: Abstraction has 4380 states and 19560 transitions. [2021-06-05 22:32:48,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:48,071 INFO L276 IsEmpty]: Start isEmpty. Operand 4380 states and 19560 transitions. [2021-06-05 22:32:48,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:32:48,077 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:48,077 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:48,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:48,278 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:48,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:48,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1117630490, now seen corresponding path program 3 times [2021-06-05 22:32:48,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:48,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730305737] [2021-06-05 22:32:48,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:48,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:48,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:48,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:48,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730305737] [2021-06-05 22:32:48,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730305737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:48,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494585423] [2021-06-05 22:32:48,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:48,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:32:48,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:48,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:32:48,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:48,593 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:48,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 22:32:48,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:48,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:48,604 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:48,604 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 22:32:48,662 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:48,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494585423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:48,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:48,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 22:32:48,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407930611] [2021-06-05 22:32:48,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:32:48,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:48,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:32:48,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:32:48,663 INFO L87 Difference]: Start difference. First operand 4380 states and 19560 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:50,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:50,018 INFO L93 Difference]: Finished difference Result 5535 states and 24294 transitions. [2021-06-05 22:32:50,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:32:50,018 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:32:50,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:50,029 INFO L225 Difference]: With dead ends: 5535 [2021-06-05 22:32:50,029 INFO L226 Difference]: Without dead ends: 5456 [2021-06-05 22:32:50,029 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 925.0ms TimeCoverageRelationStatistics Valid=255, Invalid=1467, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:32:50,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5456 states. [2021-06-05 22:32:50,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5456 to 4368. [2021-06-05 22:32:50,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4368 states, 4367 states have (on average 4.468055873597435) internal successors, (19512), 4367 states have internal predecessors, (19512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:50,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4368 states to 4368 states and 19512 transitions. [2021-06-05 22:32:50,101 INFO L78 Accepts]: Start accepts. Automaton has 4368 states and 19512 transitions. Word has length 30 [2021-06-05 22:32:50,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:50,101 INFO L482 AbstractCegarLoop]: Abstraction has 4368 states and 19512 transitions. [2021-06-05 22:32:50,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:50,101 INFO L276 IsEmpty]: Start isEmpty. Operand 4368 states and 19512 transitions. [2021-06-05 22:32:50,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:32:50,107 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:50,107 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:50,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable364 [2021-06-05 22:32:50,308 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:50,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:50,308 INFO L82 PathProgramCache]: Analyzing trace with hash -626484544, now seen corresponding path program 4 times [2021-06-05 22:32:50,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:50,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290464547] [2021-06-05 22:32:50,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:50,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:50,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:50,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:50,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290464547] [2021-06-05 22:32:50,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290464547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:50,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144348855] [2021-06-05 22:32:50,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:50,519 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:32:50,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:50,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:32:50,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:50,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 22:32:50,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:50,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:50,669 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:50,669 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 22:32:50,704 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:50,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144348855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:50,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:50,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:32:50,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641125254] [2021-06-05 22:32:50,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:32:50,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:50,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:32:50,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:32:50,705 INFO L87 Difference]: Start difference. First operand 4368 states and 19512 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:52,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:52,144 INFO L93 Difference]: Finished difference Result 6124 states and 26559 transitions. [2021-06-05 22:32:52,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:32:52,145 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:32:52,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:52,156 INFO L225 Difference]: With dead ends: 6124 [2021-06-05 22:32:52,157 INFO L226 Difference]: Without dead ends: 5972 [2021-06-05 22:32:52,157 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 965.7ms TimeCoverageRelationStatistics Valid=310, Invalid=1670, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:32:52,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5972 states. [2021-06-05 22:32:52,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5972 to 4384. [2021-06-05 22:32:52,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4384 states, 4383 states have (on average 4.469085101528633) internal successors, (19588), 4383 states have internal predecessors, (19588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:52,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4384 states to 4384 states and 19588 transitions. [2021-06-05 22:32:52,231 INFO L78 Accepts]: Start accepts. Automaton has 4384 states and 19588 transitions. Word has length 30 [2021-06-05 22:32:52,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:52,231 INFO L482 AbstractCegarLoop]: Abstraction has 4384 states and 19588 transitions. [2021-06-05 22:32:52,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:52,231 INFO L276 IsEmpty]: Start isEmpty. Operand 4384 states and 19588 transitions. [2021-06-05 22:32:52,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:32:52,237 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:52,238 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:52,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-06-05 22:32:52,438 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:52,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:52,438 INFO L82 PathProgramCache]: Analyzing trace with hash 678254850, now seen corresponding path program 4 times [2021-06-05 22:32:52,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:52,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745398718] [2021-06-05 22:32:52,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:52,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:52,580 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:52,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:52,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745398718] [2021-06-05 22:32:52,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745398718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:52,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552079496] [2021-06-05 22:32:52,580 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:52,657 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:32:52,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:52,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:32:52,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:52,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 22:32:52,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:52,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:52,846 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:52,846 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 22:32:52,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:52,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552079496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:52,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:52,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:32:52,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798115563] [2021-06-05 22:32:52,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:32:52,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:52,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:32:52,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:32:52,880 INFO L87 Difference]: Start difference. First operand 4384 states and 19588 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:54,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:54,539 INFO L93 Difference]: Finished difference Result 5922 states and 25776 transitions. [2021-06-05 22:32:54,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:32:54,540 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:32:54,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:54,551 INFO L225 Difference]: With dead ends: 5922 [2021-06-05 22:32:54,551 INFO L226 Difference]: Without dead ends: 5770 [2021-06-05 22:32:54,552 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 971.9ms TimeCoverageRelationStatistics Valid=290, Invalid=1690, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:32:54,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5770 states. [2021-06-05 22:32:54,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5770 to 4392. [2021-06-05 22:32:54,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4392 states, 4391 states have (on average 4.465953085857436) internal successors, (19610), 4391 states have internal predecessors, (19610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:54,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4392 states to 4392 states and 19610 transitions. [2021-06-05 22:32:54,628 INFO L78 Accepts]: Start accepts. Automaton has 4392 states and 19610 transitions. Word has length 30 [2021-06-05 22:32:54,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:54,628 INFO L482 AbstractCegarLoop]: Abstraction has 4392 states and 19610 transitions. [2021-06-05 22:32:54,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:54,628 INFO L276 IsEmpty]: Start isEmpty. Operand 4392 states and 19610 transitions. [2021-06-05 22:32:54,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:32:54,635 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:54,635 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:54,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2021-06-05 22:32:54,835 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:54,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:54,835 INFO L82 PathProgramCache]: Analyzing trace with hash -748987048, now seen corresponding path program 5 times [2021-06-05 22:32:54,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:54,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200778388] [2021-06-05 22:32:54,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:54,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:54,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:54,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:54,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200778388] [2021-06-05 22:32:54,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200778388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:54,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228771250] [2021-06-05 22:32:54,981 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:55,017 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:32:55,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:55,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:32:55,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:55,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:32:55,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:32:55,163 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:55,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2021-06-05 22:32:55,166 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:32:55,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:55,173 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:55,173 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:20 [2021-06-05 22:32:55,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:55,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228771250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:55,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:55,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 22:32:55,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894567160] [2021-06-05 22:32:55,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:32:55,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:55,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:32:55,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:32:55,252 INFO L87 Difference]: Start difference. First operand 4392 states and 19610 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:56,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:56,673 INFO L93 Difference]: Finished difference Result 5826 states and 25222 transitions. [2021-06-05 22:32:56,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:32:56,673 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:32:56,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:56,685 INFO L225 Difference]: With dead ends: 5826 [2021-06-05 22:32:56,685 INFO L226 Difference]: Without dead ends: 5587 [2021-06-05 22:32:56,685 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 962.4ms TimeCoverageRelationStatistics Valid=360, Invalid=1620, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:32:56,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5587 states. [2021-06-05 22:32:56,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5587 to 4393. [2021-06-05 22:32:56,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4393 states, 4392 states have (on average 4.466302367941712) internal successors, (19616), 4392 states have internal predecessors, (19616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:56,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4393 states to 4393 states and 19616 transitions. [2021-06-05 22:32:56,761 INFO L78 Accepts]: Start accepts. Automaton has 4393 states and 19616 transitions. Word has length 30 [2021-06-05 22:32:56,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:56,761 INFO L482 AbstractCegarLoop]: Abstraction has 4393 states and 19616 transitions. [2021-06-05 22:32:56,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:56,761 INFO L276 IsEmpty]: Start isEmpty. Operand 4393 states and 19616 transitions. [2021-06-05 22:32:56,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:32:56,768 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:56,768 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:56,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable368,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:56,968 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:56,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:56,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1255333314, now seen corresponding path program 6 times [2021-06-05 22:32:56,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:56,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618835088] [2021-06-05 22:32:56,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:56,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:57,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:57,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:57,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618835088] [2021-06-05 22:32:57,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618835088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:57,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817957283] [2021-06-05 22:32:57,113 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:57,149 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:32:57,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:32:57,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:32:57,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:57,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:32:57,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:32:57,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:32:57,334 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:57,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 42 [2021-06-05 22:32:57,337 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:32:57,361 INFO L628 ElimStorePlain]: treesize reduction 27, result has 50.0 percent of original size [2021-06-05 22:32:57,363 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:57,363 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-06-05 22:32:57,456 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:57,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817957283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:57,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:32:57,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:32:57,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141297056] [2021-06-05 22:32:57,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:32:57,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:32:57,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:32:57,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:32:57,458 INFO L87 Difference]: Start difference. First operand 4393 states and 19616 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:59,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:32:59,393 INFO L93 Difference]: Finished difference Result 5773 states and 25069 transitions. [2021-06-05 22:32:59,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 22:32:59,394 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:32:59,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:32:59,405 INFO L225 Difference]: With dead ends: 5773 [2021-06-05 22:32:59,405 INFO L226 Difference]: Without dead ends: 5628 [2021-06-05 22:32:59,405 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 917 ImplicationChecksByTransitivity, 1523.1ms TimeCoverageRelationStatistics Valid=578, Invalid=2962, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 22:32:59,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5628 states. [2021-06-05 22:32:59,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5628 to 4376. [2021-06-05 22:32:59,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4376 states, 4375 states have (on average 4.468571428571429) internal successors, (19550), 4375 states have internal predecessors, (19550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:59,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4376 states to 4376 states and 19550 transitions. [2021-06-05 22:32:59,478 INFO L78 Accepts]: Start accepts. Automaton has 4376 states and 19550 transitions. Word has length 30 [2021-06-05 22:32:59,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:32:59,478 INFO L482 AbstractCegarLoop]: Abstraction has 4376 states and 19550 transitions. [2021-06-05 22:32:59,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:32:59,478 INFO L276 IsEmpty]: Start isEmpty. Operand 4376 states and 19550 transitions. [2021-06-05 22:32:59,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:32:59,484 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:32:59,484 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:32:59,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:59,685 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:32:59,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:32:59,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1510857112, now seen corresponding path program 7 times [2021-06-05 22:32:59,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:32:59,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857093938] [2021-06-05 22:32:59,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:32:59,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:59,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:32:59,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:32:59,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857093938] [2021-06-05 22:32:59,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857093938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:32:59,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174941216] [2021-06-05 22:32:59,808 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:32:59,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:32:59,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:32:59,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:32:59,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:32:59,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:32:59,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:32:59,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:32:59,953 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 22:33:00,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:00,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174941216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:00,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:00,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:33:00,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542084778] [2021-06-05 22:33:00,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:33:00,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:00,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:33:00,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:33:00,014 INFO L87 Difference]: Start difference. First operand 4376 states and 19550 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:01,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:01,188 INFO L93 Difference]: Finished difference Result 5468 states and 23984 transitions. [2021-06-05 22:33:01,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:33:01,188 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:33:01,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:01,198 INFO L225 Difference]: With dead ends: 5468 [2021-06-05 22:33:01,198 INFO L226 Difference]: Without dead ends: 5395 [2021-06-05 22:33:01,198 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 826.8ms TimeCoverageRelationStatistics Valid=209, Invalid=1051, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:33:01,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5395 states. [2021-06-05 22:33:01,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5395 to 4388. [2021-06-05 22:33:01,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4388 states, 4387 states have (on average 4.4679735582402555) internal successors, (19601), 4387 states have internal predecessors, (19601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:01,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4388 states to 4388 states and 19601 transitions. [2021-06-05 22:33:01,266 INFO L78 Accepts]: Start accepts. Automaton has 4388 states and 19601 transitions. Word has length 30 [2021-06-05 22:33:01,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:01,266 INFO L482 AbstractCegarLoop]: Abstraction has 4388 states and 19601 transitions. [2021-06-05 22:33:01,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:01,266 INFO L276 IsEmpty]: Start isEmpty. Operand 4388 states and 19601 transitions. [2021-06-05 22:33:01,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:33:01,272 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:01,272 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:01,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2021-06-05 22:33:01,473 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:01,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:01,473 INFO L82 PathProgramCache]: Analyzing trace with hash -973956236, now seen corresponding path program 8 times [2021-06-05 22:33:01,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:01,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693623771] [2021-06-05 22:33:01,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:01,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:01,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:01,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:01,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693623771] [2021-06-05 22:33:01,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693623771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:01,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091934447] [2021-06-05 22:33:01,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:01,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:33:01,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:01,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:33:01,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:01,745 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:01,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 22:33:01,746 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:01,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:01,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:01,757 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 22:33:01,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:01,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091934447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:01,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:01,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 22:33:01,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500181370] [2021-06-05 22:33:01,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:33:01,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:01,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:33:01,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:33:01,875 INFO L87 Difference]: Start difference. First operand 4388 states and 19601 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:03,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:03,004 INFO L93 Difference]: Finished difference Result 5415 states and 23774 transitions. [2021-06-05 22:33:03,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:33:03,004 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:33:03,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:03,015 INFO L225 Difference]: With dead ends: 5415 [2021-06-05 22:33:03,015 INFO L226 Difference]: Without dead ends: 5343 [2021-06-05 22:33:03,015 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 845.3ms TimeCoverageRelationStatistics Valid=230, Invalid=1252, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:33:03,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5343 states. [2021-06-05 22:33:03,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5343 to 4382. [2021-06-05 22:33:03,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4382 states, 4381 states have (on average 4.468614471581831) internal successors, (19577), 4381 states have internal predecessors, (19577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:03,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4382 states to 4382 states and 19577 transitions. [2021-06-05 22:33:03,086 INFO L78 Accepts]: Start accepts. Automaton has 4382 states and 19577 transitions. Word has length 30 [2021-06-05 22:33:03,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:03,086 INFO L482 AbstractCegarLoop]: Abstraction has 4382 states and 19577 transitions. [2021-06-05 22:33:03,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:03,087 INFO L276 IsEmpty]: Start isEmpty. Operand 4382 states and 19577 transitions. [2021-06-05 22:33:03,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:33:03,093 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:03,093 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:03,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2021-06-05 22:33:03,294 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:03,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:03,294 INFO L82 PathProgramCache]: Analyzing trace with hash 220115106, now seen corresponding path program 9 times [2021-06-05 22:33:03,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:03,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125245307] [2021-06-05 22:33:03,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:03,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:03,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:03,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:03,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125245307] [2021-06-05 22:33:03,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125245307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:03,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428257049] [2021-06-05 22:33:03,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:03,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:33:03,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:03,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:33:03,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:03,571 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:03,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 22:33:03,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:03,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:03,583 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:03,583 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 22:33:03,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:03,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428257049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:03,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:03,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:33:03,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092832449] [2021-06-05 22:33:03,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:33:03,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:03,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:33:03,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:33:03,702 INFO L87 Difference]: Start difference. First operand 4382 states and 19577 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:05,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:05,462 INFO L93 Difference]: Finished difference Result 5612 states and 24460 transitions. [2021-06-05 22:33:05,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 22:33:05,462 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:33:05,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:05,473 INFO L225 Difference]: With dead ends: 5612 [2021-06-05 22:33:05,473 INFO L226 Difference]: Without dead ends: 5470 [2021-06-05 22:33:05,473 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 1280.2ms TimeCoverageRelationStatistics Valid=380, Invalid=1876, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 22:33:05,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5470 states. [2021-06-05 22:33:05,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5470 to 4379. [2021-06-05 22:33:05,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4379 states, 4378 states have (on average 4.468478757423481) internal successors, (19563), 4378 states have internal predecessors, (19563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:05,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4379 states to 4379 states and 19563 transitions. [2021-06-05 22:33:05,546 INFO L78 Accepts]: Start accepts. Automaton has 4379 states and 19563 transitions. Word has length 30 [2021-06-05 22:33:05,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:05,546 INFO L482 AbstractCegarLoop]: Abstraction has 4379 states and 19563 transitions. [2021-06-05 22:33:05,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:05,546 INFO L276 IsEmpty]: Start isEmpty. Operand 4379 states and 19563 transitions. [2021-06-05 22:33:05,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:33:05,553 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:05,553 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:05,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable379 [2021-06-05 22:33:05,753 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:05,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:05,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1039746178, now seen corresponding path program 10 times [2021-06-05 22:33:05,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:05,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958028608] [2021-06-05 22:33:05,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:05,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:05,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:05,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:05,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958028608] [2021-06-05 22:33:05,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958028608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:05,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444225132] [2021-06-05 22:33:05,904 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:05,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:33:05,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:05,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:33:05,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:06,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:33:06,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:06,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:06,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:06,049 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 22:33:06,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:06,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444225132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:06,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:06,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:33:06,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552704435] [2021-06-05 22:33:06,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:33:06,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:06,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:33:06,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:33:06,112 INFO L87 Difference]: Start difference. First operand 4379 states and 19563 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:07,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:07,310 INFO L93 Difference]: Finished difference Result 5484 states and 24041 transitions. [2021-06-05 22:33:07,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:33:07,311 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:33:07,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:07,322 INFO L225 Difference]: With dead ends: 5484 [2021-06-05 22:33:07,322 INFO L226 Difference]: Without dead ends: 5411 [2021-06-05 22:33:07,322 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 843.2ms TimeCoverageRelationStatistics Valid=228, Invalid=1178, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:33:07,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5411 states. [2021-06-05 22:33:07,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5411 to 4385. [2021-06-05 22:33:07,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4385 states, 4384 states have (on average 4.467837591240876) internal successors, (19587), 4384 states have internal predecessors, (19587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:07,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4385 states to 4385 states and 19587 transitions. [2021-06-05 22:33:07,396 INFO L78 Accepts]: Start accepts. Automaton has 4385 states and 19587 transitions. Word has length 30 [2021-06-05 22:33:07,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:07,396 INFO L482 AbstractCegarLoop]: Abstraction has 4385 states and 19587 transitions. [2021-06-05 22:33:07,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:07,396 INFO L276 IsEmpty]: Start isEmpty. Operand 4385 states and 19587 transitions. [2021-06-05 22:33:07,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:33:07,403 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:07,403 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:07,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:07,603 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:07,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:07,603 INFO L82 PathProgramCache]: Analyzing trace with hash -419262112, now seen corresponding path program 11 times [2021-06-05 22:33:07,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:07,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723638962] [2021-06-05 22:33:07,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:07,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:07,754 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:07,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:07,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723638962] [2021-06-05 22:33:07,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723638962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:07,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800956128] [2021-06-05 22:33:07,754 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:07,791 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:33:07,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:07,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:33:07,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:07,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:33:07,916 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:07,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 49 [2021-06-05 22:33:07,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:07,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:07,936 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:07,936 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:49 [2021-06-05 22:33:08,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:08,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800956128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:08,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:08,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 22:33:08,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199407500] [2021-06-05 22:33:08,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:33:08,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:08,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:33:08,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:33:08,240 INFO L87 Difference]: Start difference. First operand 4385 states and 19587 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:10,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:10,257 INFO L93 Difference]: Finished difference Result 5324 states and 23333 transitions. [2021-06-05 22:33:10,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 22:33:10,258 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:33:10,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:10,269 INFO L225 Difference]: With dead ends: 5324 [2021-06-05 22:33:10,269 INFO L226 Difference]: Without dead ends: 5272 [2021-06-05 22:33:10,269 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 1496.6ms TimeCoverageRelationStatistics Valid=294, Invalid=2156, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 22:33:10,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5272 states. [2021-06-05 22:33:10,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5272 to 4382. [2021-06-05 22:33:10,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4382 states, 4381 states have (on average 4.468614471581831) internal successors, (19577), 4381 states have internal predecessors, (19577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:10,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4382 states to 4382 states and 19577 transitions. [2021-06-05 22:33:10,340 INFO L78 Accepts]: Start accepts. Automaton has 4382 states and 19577 transitions. Word has length 30 [2021-06-05 22:33:10,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:10,340 INFO L482 AbstractCegarLoop]: Abstraction has 4382 states and 19577 transitions. [2021-06-05 22:33:10,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:10,340 INFO L276 IsEmpty]: Start isEmpty. Operand 4382 states and 19577 transitions. [2021-06-05 22:33:10,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:33:10,347 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:10,347 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:10,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:10,547 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:10,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:10,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1328012258, now seen corresponding path program 12 times [2021-06-05 22:33:10,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:10,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156004918] [2021-06-05 22:33:10,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:10,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:10,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:10,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:10,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156004918] [2021-06-05 22:33:10,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156004918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:10,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391168555] [2021-06-05 22:33:10,779 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:10,832 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:33:10,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:10,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 22:33:10,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:10,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:33:11,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:33:11,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:33:11,011 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:11,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2021-06-05 22:33:11,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:11,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:11,029 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:11,030 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:50 [2021-06-05 22:33:11,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:11,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391168555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:11,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:11,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 22:33:11,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164769565] [2021-06-05 22:33:11,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:33:11,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:11,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:33:11,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:33:11,259 INFO L87 Difference]: Start difference. First operand 4382 states and 19577 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:13,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:13,353 INFO L93 Difference]: Finished difference Result 5665 states and 24579 transitions. [2021-06-05 22:33:13,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 22:33:13,353 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:33:13,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:13,364 INFO L225 Difference]: With dead ends: 5665 [2021-06-05 22:33:13,365 INFO L226 Difference]: Without dead ends: 5500 [2021-06-05 22:33:13,365 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 962 ImplicationChecksByTransitivity, 1845.5ms TimeCoverageRelationStatistics Valid=500, Invalid=3040, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 22:33:13,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5500 states. [2021-06-05 22:33:13,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5500 to 4379. [2021-06-05 22:33:13,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4379 states, 4378 states have (on average 4.468478757423481) internal successors, (19563), 4378 states have internal predecessors, (19563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:13,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4379 states to 4379 states and 19563 transitions. [2021-06-05 22:33:13,437 INFO L78 Accepts]: Start accepts. Automaton has 4379 states and 19563 transitions. Word has length 30 [2021-06-05 22:33:13,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:13,437 INFO L482 AbstractCegarLoop]: Abstraction has 4379 states and 19563 transitions. [2021-06-05 22:33:13,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:13,437 INFO L276 IsEmpty]: Start isEmpty. Operand 4379 states and 19563 transitions. [2021-06-05 22:33:13,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:33:13,444 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:13,444 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:13,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2021-06-05 22:33:13,649 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:13,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:13,649 INFO L82 PathProgramCache]: Analyzing trace with hash 352000544, now seen corresponding path program 13 times [2021-06-05 22:33:13,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:13,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375539816] [2021-06-05 22:33:13,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:13,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:13,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:13,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:13,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375539816] [2021-06-05 22:33:13,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375539816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:13,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042096459] [2021-06-05 22:33:13,805 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:13,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:13,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:33:13,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:13,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:33:13,943 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:13,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:13,946 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:13,947 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 22:33:14,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:14,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042096459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:14,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:14,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:33:14,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393209227] [2021-06-05 22:33:14,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:33:14,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:14,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:33:14,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:33:14,013 INFO L87 Difference]: Start difference. First operand 4379 states and 19563 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:15,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:15,297 INFO L93 Difference]: Finished difference Result 5609 states and 24576 transitions. [2021-06-05 22:33:15,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:33:15,298 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:33:15,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:15,309 INFO L225 Difference]: With dead ends: 5609 [2021-06-05 22:33:15,309 INFO L226 Difference]: Without dead ends: 5538 [2021-06-05 22:33:15,310 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 924.9ms TimeCoverageRelationStatistics Valid=262, Invalid=1220, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:33:15,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5538 states. [2021-06-05 22:33:15,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5538 to 4380. [2021-06-05 22:33:15,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4380 states, 4379 states have (on average 4.468828499657456) internal successors, (19569), 4379 states have internal predecessors, (19569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:15,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4380 states to 4380 states and 19569 transitions. [2021-06-05 22:33:15,382 INFO L78 Accepts]: Start accepts. Automaton has 4380 states and 19569 transitions. Word has length 30 [2021-06-05 22:33:15,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:15,382 INFO L482 AbstractCegarLoop]: Abstraction has 4380 states and 19569 transitions. [2021-06-05 22:33:15,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:15,383 INFO L276 IsEmpty]: Start isEmpty. Operand 4380 states and 19569 transitions. [2021-06-05 22:33:15,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:33:15,390 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:15,390 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:15,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable404,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:15,593 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:15,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:15,593 INFO L82 PathProgramCache]: Analyzing trace with hash -284466310, now seen corresponding path program 14 times [2021-06-05 22:33:15,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:15,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174450551] [2021-06-05 22:33:15,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:15,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:15,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:15,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:15,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174450551] [2021-06-05 22:33:15,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174450551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:15,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734540283] [2021-06-05 22:33:15,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:15,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:33:15,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:15,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:33:15,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:15,863 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:15,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 22:33:15,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:15,875 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:15,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:15,876 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 22:33:15,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:15,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734540283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:15,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:15,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:33:15,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735310103] [2021-06-05 22:33:15,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:33:15,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:15,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:33:15,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:33:15,995 INFO L87 Difference]: Start difference. First operand 4380 states and 19569 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:17,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:17,563 INFO L93 Difference]: Finished difference Result 5659 states and 24633 transitions. [2021-06-05 22:33:17,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 22:33:17,563 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:33:17,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:17,575 INFO L225 Difference]: With dead ends: 5659 [2021-06-05 22:33:17,575 INFO L226 Difference]: Without dead ends: 5531 [2021-06-05 22:33:17,575 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 1095.2ms TimeCoverageRelationStatistics Valid=390, Invalid=1772, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 22:33:17,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5531 states. [2021-06-05 22:33:17,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5531 to 4373. [2021-06-05 22:33:17,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4373 states, 4372 states have (on average 4.469121683440073) internal successors, (19539), 4372 states have internal predecessors, (19539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:17,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4373 states to 4373 states and 19539 transitions. [2021-06-05 22:33:17,649 INFO L78 Accepts]: Start accepts. Automaton has 4373 states and 19539 transitions. Word has length 30 [2021-06-05 22:33:17,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:17,649 INFO L482 AbstractCegarLoop]: Abstraction has 4373 states and 19539 transitions. [2021-06-05 22:33:17,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:17,649 INFO L276 IsEmpty]: Start isEmpty. Operand 4373 states and 19539 transitions. [2021-06-05 22:33:17,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:33:17,656 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:17,656 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:17,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:17,856 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:17,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:17,857 INFO L82 PathProgramCache]: Analyzing trace with hash -954175358, now seen corresponding path program 5 times [2021-06-05 22:33:17,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:17,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336925027] [2021-06-05 22:33:17,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:17,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:18,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:18,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:18,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336925027] [2021-06-05 22:33:18,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336925027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:18,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258826936] [2021-06-05 22:33:18,047 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:18,099 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:33:18,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:18,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:33:18,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:18,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 22:33:18,301 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:18,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:18,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:18,303 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 22:33:18,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:18,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258826936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:18,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:18,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:33:18,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738011934] [2021-06-05 22:33:18,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:33:18,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:18,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:33:18,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:33:18,354 INFO L87 Difference]: Start difference. First operand 4373 states and 19539 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:19,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:19,643 INFO L93 Difference]: Finished difference Result 6100 states and 26636 transitions. [2021-06-05 22:33:19,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 22:33:19,643 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:33:19,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:19,656 INFO L225 Difference]: With dead ends: 6100 [2021-06-05 22:33:19,656 INFO L226 Difference]: Without dead ends: 6029 [2021-06-05 22:33:19,656 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 921.1ms TimeCoverageRelationStatistics Valid=312, Invalid=1758, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 22:33:19,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6029 states. [2021-06-05 22:33:19,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6029 to 4410. [2021-06-05 22:33:19,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4410 states, 4409 states have (on average 4.463823996371059) internal successors, (19681), 4409 states have internal predecessors, (19681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:19,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4410 states to 4410 states and 19681 transitions. [2021-06-05 22:33:19,761 INFO L78 Accepts]: Start accepts. Automaton has 4410 states and 19681 transitions. Word has length 30 [2021-06-05 22:33:19,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:19,761 INFO L482 AbstractCegarLoop]: Abstraction has 4410 states and 19681 transitions. [2021-06-05 22:33:19,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:19,761 INFO L276 IsEmpty]: Start isEmpty. Operand 4410 states and 19681 transitions. [2021-06-05 22:33:19,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:33:19,768 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:19,768 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:19,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:19,968 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:19,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:19,969 INFO L82 PathProgramCache]: Analyzing trace with hash 350564036, now seen corresponding path program 15 times [2021-06-05 22:33:19,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:19,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805454977] [2021-06-05 22:33:19,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:19,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:20,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:20,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:20,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805454977] [2021-06-05 22:33:20,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805454977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:20,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756209734] [2021-06-05 22:33:20,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:20,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:33:20,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:20,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:33:20,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:20,329 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:20,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 22:33:20,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:20,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:20,339 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:20,340 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 22:33:20,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:20,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756209734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:20,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:20,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 22:33:20,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038167450] [2021-06-05 22:33:20,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:33:20,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:20,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:33:20,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:33:20,409 INFO L87 Difference]: Start difference. First operand 4410 states and 19681 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:20,701 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-06-05 22:33:21,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:21,959 INFO L93 Difference]: Finished difference Result 6047 states and 26146 transitions. [2021-06-05 22:33:21,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 22:33:21,959 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:33:21,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:21,971 INFO L225 Difference]: With dead ends: 6047 [2021-06-05 22:33:21,972 INFO L226 Difference]: Without dead ends: 5820 [2021-06-05 22:33:21,972 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 1063.8ms TimeCoverageRelationStatistics Valid=393, Invalid=1769, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 22:33:21,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5820 states. [2021-06-05 22:33:22,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5820 to 4422. [2021-06-05 22:33:22,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4422 states, 4421 states have (on average 4.459850712508482) internal successors, (19717), 4421 states have internal predecessors, (19717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:22,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4422 states to 4422 states and 19717 transitions. [2021-06-05 22:33:22,056 INFO L78 Accepts]: Start accepts. Automaton has 4422 states and 19717 transitions. Word has length 30 [2021-06-05 22:33:22,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:22,056 INFO L482 AbstractCegarLoop]: Abstraction has 4422 states and 19717 transitions. [2021-06-05 22:33:22,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:22,056 INFO L276 IsEmpty]: Start isEmpty. Operand 4422 states and 19717 transitions. [2021-06-05 22:33:22,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:33:22,063 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:22,063 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:22,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable408 [2021-06-05 22:33:22,263 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:22,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:22,264 INFO L82 PathProgramCache]: Analyzing trace with hash -304490722, now seen corresponding path program 16 times [2021-06-05 22:33:22,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:22,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826464499] [2021-06-05 22:33:22,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:22,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:22,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:22,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:22,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826464499] [2021-06-05 22:33:22,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826464499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:22,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814626934] [2021-06-05 22:33:22,421 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:22,456 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:33:22,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:22,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:33:22,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:22,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 22:33:22,590 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:22,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:22,593 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:22,593 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 22:33:22,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:22,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814626934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:22,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:22,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:33:22,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117315203] [2021-06-05 22:33:22,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:33:22,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:22,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:33:22,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:33:22,644 INFO L87 Difference]: Start difference. First operand 4422 states and 19717 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:23,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:23,878 INFO L93 Difference]: Finished difference Result 5763 states and 25276 transitions. [2021-06-05 22:33:23,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:33:23,878 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:33:23,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:23,890 INFO L225 Difference]: With dead ends: 5763 [2021-06-05 22:33:23,890 INFO L226 Difference]: Without dead ends: 5692 [2021-06-05 22:33:23,890 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 788.9ms TimeCoverageRelationStatistics Valid=281, Invalid=1441, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:33:23,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5692 states. [2021-06-05 22:33:23,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5692 to 4423. [2021-06-05 22:33:23,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4423 states, 4422 states have (on average 4.460199004975125) internal successors, (19723), 4422 states have internal predecessors, (19723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:23,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4423 states to 4423 states and 19723 transitions. [2021-06-05 22:33:23,965 INFO L78 Accepts]: Start accepts. Automaton has 4423 states and 19723 transitions. Word has length 30 [2021-06-05 22:33:23,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:23,965 INFO L482 AbstractCegarLoop]: Abstraction has 4423 states and 19723 transitions. [2021-06-05 22:33:23,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:23,965 INFO L276 IsEmpty]: Start isEmpty. Operand 4423 states and 19723 transitions. [2021-06-05 22:33:23,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:33:23,972 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:23,972 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:24,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-06-05 22:33:24,173 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:24,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:24,173 INFO L82 PathProgramCache]: Analyzing trace with hash -810836988, now seen corresponding path program 17 times [2021-06-05 22:33:24,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:24,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606907440] [2021-06-05 22:33:24,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:24,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:24,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:24,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:24,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606907440] [2021-06-05 22:33:24,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606907440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:24,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557183925] [2021-06-05 22:33:24,328 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:24,363 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:33:24,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:24,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:33:24,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:24,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:33:24,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:33:24,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:33:24,554 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:24,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 47 [2021-06-05 22:33:24,562 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:33:24,589 INFO L628 ElimStorePlain]: treesize reduction 33, result has 48.4 percent of original size [2021-06-05 22:33:24,591 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:24,591 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:36 [2021-06-05 22:33:24,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:24,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557183925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:24,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:24,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 22:33:24,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935817969] [2021-06-05 22:33:24,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:33:24,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:24,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:33:24,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:33:24,702 INFO L87 Difference]: Start difference. First operand 4423 states and 19723 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:26,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:26,039 INFO L93 Difference]: Finished difference Result 5851 states and 25327 transitions. [2021-06-05 22:33:26,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:33:26,040 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:33:26,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:26,051 INFO L225 Difference]: With dead ends: 5851 [2021-06-05 22:33:26,051 INFO L226 Difference]: Without dead ends: 5652 [2021-06-05 22:33:26,051 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 825.9ms TimeCoverageRelationStatistics Valid=288, Invalid=1352, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:33:26,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5652 states. [2021-06-05 22:33:26,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5652 to 4406. [2021-06-05 22:33:26,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4406 states, 4405 states have (on average 4.462429057888762) internal successors, (19657), 4405 states have internal predecessors, (19657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:26,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4406 states to 4406 states and 19657 transitions. [2021-06-05 22:33:26,123 INFO L78 Accepts]: Start accepts. Automaton has 4406 states and 19657 transitions. Word has length 30 [2021-06-05 22:33:26,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:26,123 INFO L482 AbstractCegarLoop]: Abstraction has 4406 states and 19657 transitions. [2021-06-05 22:33:26,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:26,123 INFO L276 IsEmpty]: Start isEmpty. Operand 4406 states and 19657 transitions. [2021-06-05 22:33:26,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:33:26,130 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:26,130 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:26,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-06-05 22:33:26,331 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:26,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:26,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1446402370, now seen corresponding path program 1 times [2021-06-05 22:33:26,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:26,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043441784] [2021-06-05 22:33:26,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:26,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:26,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:26,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:26,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043441784] [2021-06-05 22:33:26,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043441784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:26,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371845541] [2021-06-05 22:33:26,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:26,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:26,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:33:26,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:26,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:33:26,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:33:26,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:33:26,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 22:33:26,712 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:26,717 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:26,718 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:26,718 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:11 [2021-06-05 22:33:26,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:26,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371845541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:26,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:26,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 22:33:26,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167329435] [2021-06-05 22:33:26,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:33:26,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:26,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:33:26,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:33:26,741 INFO L87 Difference]: Start difference. First operand 4406 states and 19657 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:27,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:27,070 INFO L93 Difference]: Finished difference Result 4991 states and 22000 transitions. [2021-06-05 22:33:27,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:33:27,071 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:33:27,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:27,081 INFO L225 Difference]: With dead ends: 4991 [2021-06-05 22:33:27,081 INFO L226 Difference]: Without dead ends: 4920 [2021-06-05 22:33:27,081 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 326.2ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:33:27,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4920 states. [2021-06-05 22:33:27,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4920 to 4409. [2021-06-05 22:33:27,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4409 states, 4408 states have (on average 4.463248638838476) internal successors, (19674), 4408 states have internal predecessors, (19674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:27,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4409 states to 4409 states and 19674 transitions. [2021-06-05 22:33:27,154 INFO L78 Accepts]: Start accepts. Automaton has 4409 states and 19674 transitions. Word has length 30 [2021-06-05 22:33:27,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:27,154 INFO L482 AbstractCegarLoop]: Abstraction has 4409 states and 19674 transitions. [2021-06-05 22:33:27,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:27,154 INFO L276 IsEmpty]: Start isEmpty. Operand 4409 states and 19674 transitions. [2021-06-05 22:33:27,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:33:27,161 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:27,161 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:27,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable418,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:27,361 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:27,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:27,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1163137630, now seen corresponding path program 18 times [2021-06-05 22:33:27,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:27,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568769335] [2021-06-05 22:33:27,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:27,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:27,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:27,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:27,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568769335] [2021-06-05 22:33:27,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568769335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:27,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331791781] [2021-06-05 22:33:27,566 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:27,605 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:33:27,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:27,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:33:27,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:27,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:33:27,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:33:27,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:33:27,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 22:33:27,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:27,915 INFO L628 ElimStorePlain]: treesize reduction 3, result has 88.0 percent of original size [2021-06-05 22:33:27,916 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:27,916 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:11 [2021-06-05 22:33:27,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:27,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331791781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:27,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:27,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 24 [2021-06-05 22:33:27,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500117912] [2021-06-05 22:33:27,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:33:27,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:27,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:33:27,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:33:27,962 INFO L87 Difference]: Start difference. First operand 4409 states and 19674 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:29,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:29,003 INFO L93 Difference]: Finished difference Result 4803 states and 21171 transitions. [2021-06-05 22:33:29,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:33:29,003 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:33:29,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:29,013 INFO L225 Difference]: With dead ends: 4803 [2021-06-05 22:33:29,013 INFO L226 Difference]: Without dead ends: 4748 [2021-06-05 22:33:29,013 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 712.9ms TimeCoverageRelationStatistics Valid=121, Invalid=1001, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:33:29,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4748 states. [2021-06-05 22:33:29,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4748 to 4427. [2021-06-05 22:33:29,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4427 states, 4426 states have (on average 4.457975598734749) internal successors, (19731), 4426 states have internal predecessors, (19731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:29,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4427 states to 4427 states and 19731 transitions. [2021-06-05 22:33:29,082 INFO L78 Accepts]: Start accepts. Automaton has 4427 states and 19731 transitions. Word has length 30 [2021-06-05 22:33:29,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:29,082 INFO L482 AbstractCegarLoop]: Abstraction has 4427 states and 19731 transitions. [2021-06-05 22:33:29,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:29,083 INFO L276 IsEmpty]: Start isEmpty. Operand 4427 states and 19731 transitions. [2021-06-05 22:33:29,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:33:29,089 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:29,089 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:29,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable419,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:29,291 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:29,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:29,291 INFO L82 PathProgramCache]: Analyzing trace with hash 229006916, now seen corresponding path program 19 times [2021-06-05 22:33:29,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:29,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430498004] [2021-06-05 22:33:29,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:29,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:29,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:29,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:29,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430498004] [2021-06-05 22:33:29,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430498004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:29,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653807706] [2021-06-05 22:33:29,494 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:29,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:29,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:33:29,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:29,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:33:29,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:33:29,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:33:29,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 22:33:29,760 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:29,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:29,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:29,770 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:14 [2021-06-05 22:33:29,858 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:29,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653807706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:29,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:29,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-06-05 22:33:29,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26141275] [2021-06-05 22:33:29,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:33:29,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:29,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:33:29,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:33:29,859 INFO L87 Difference]: Start difference. First operand 4427 states and 19731 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:30,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:30,814 INFO L93 Difference]: Finished difference Result 5007 states and 22048 transitions. [2021-06-05 22:33:30,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:33:30,814 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:33:30,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:30,824 INFO L225 Difference]: With dead ends: 5007 [2021-06-05 22:33:30,824 INFO L226 Difference]: Without dead ends: 4936 [2021-06-05 22:33:30,824 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 726.9ms TimeCoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:33:30,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4936 states. [2021-06-05 22:33:30,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4936 to 4463. [2021-06-05 22:33:30,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4463 states, 4462 states have (on average 4.449350067234424) internal successors, (19853), 4462 states have internal predecessors, (19853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:30,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4463 states to 4463 states and 19853 transitions. [2021-06-05 22:33:30,895 INFO L78 Accepts]: Start accepts. Automaton has 4463 states and 19853 transitions. Word has length 30 [2021-06-05 22:33:30,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:30,895 INFO L482 AbstractCegarLoop]: Abstraction has 4463 states and 19853 transitions. [2021-06-05 22:33:30,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:30,895 INFO L276 IsEmpty]: Start isEmpty. Operand 4463 states and 19853 transitions. [2021-06-05 22:33:30,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:33:30,902 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:30,902 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:31,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2021-06-05 22:33:31,103 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:31,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:31,103 INFO L82 PathProgramCache]: Analyzing trace with hash -277339350, now seen corresponding path program 20 times [2021-06-05 22:33:31,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:31,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055972005] [2021-06-05 22:33:31,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:31,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:31,293 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:31,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:31,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055972005] [2021-06-05 22:33:31,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055972005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:31,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026475305] [2021-06-05 22:33:31,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:31,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:33:31,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:31,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:33:31,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:31,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:33:31,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:33:31,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:33:31,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 22:33:31,676 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:31,691 INFO L628 ElimStorePlain]: treesize reduction 3, result has 89.3 percent of original size [2021-06-05 22:33:31,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:31,692 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:14 [2021-06-05 22:33:31,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:31,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026475305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:31,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:31,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 24 [2021-06-05 22:33:31,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547806928] [2021-06-05 22:33:31,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:33:31,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:31,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:33:31,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:33:31,760 INFO L87 Difference]: Start difference. First operand 4463 states and 19853 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:32,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:32,731 INFO L93 Difference]: Finished difference Result 4797 states and 21140 transitions. [2021-06-05 22:33:32,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:33:32,732 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:33:32,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:32,741 INFO L225 Difference]: With dead ends: 4797 [2021-06-05 22:33:32,741 INFO L226 Difference]: Without dead ends: 4742 [2021-06-05 22:33:32,741 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 730.0ms TimeCoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:33:32,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4742 states. [2021-06-05 22:33:32,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4742 to 4457. [2021-06-05 22:33:32,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4457 states, 4456 states have (on average 4.450628366247756) internal successors, (19832), 4456 states have internal predecessors, (19832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:32,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4457 states to 4457 states and 19832 transitions. [2021-06-05 22:33:32,808 INFO L78 Accepts]: Start accepts. Automaton has 4457 states and 19832 transitions. Word has length 30 [2021-06-05 22:33:32,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:32,808 INFO L482 AbstractCegarLoop]: Abstraction has 4457 states and 19832 transitions. [2021-06-05 22:33:32,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:32,809 INFO L276 IsEmpty]: Start isEmpty. Operand 4457 states and 19832 transitions. [2021-06-05 22:33:32,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:33:32,816 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:32,816 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:33,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable421,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:33,016 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:33,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:33,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1582606780, now seen corresponding path program 2 times [2021-06-05 22:33:33,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:33,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598212445] [2021-06-05 22:33:33,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:33,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:33,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:33,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:33,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598212445] [2021-06-05 22:33:33,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598212445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:33,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870492058] [2021-06-05 22:33:33,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:33,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:33:33,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:33,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:33:33,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:33,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:33:33,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:33:33,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:33:33,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 22:33:33,402 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:33,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:33,409 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:33,409 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 22:33:33,437 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:33,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870492058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:33,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:33,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 22:33:33,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668447585] [2021-06-05 22:33:33,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:33:33,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:33,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:33:33,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:33:33,438 INFO L87 Difference]: Start difference. First operand 4457 states and 19832 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:34,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:34,183 INFO L93 Difference]: Finished difference Result 5177 states and 22688 transitions. [2021-06-05 22:33:34,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:33:34,183 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:33:34,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:34,194 INFO L225 Difference]: With dead ends: 5177 [2021-06-05 22:33:34,194 INFO L226 Difference]: Without dead ends: 5104 [2021-06-05 22:33:34,194 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 395.1ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:33:34,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5104 states. [2021-06-05 22:33:34,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5104 to 4502. [2021-06-05 22:33:34,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4502 states, 4501 states have (on average 4.452121750722061) internal successors, (20039), 4501 states have internal predecessors, (20039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:34,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4502 states to 4502 states and 20039 transitions. [2021-06-05 22:33:34,279 INFO L78 Accepts]: Start accepts. Automaton has 4502 states and 20039 transitions. Word has length 30 [2021-06-05 22:33:34,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:34,279 INFO L482 AbstractCegarLoop]: Abstraction has 4502 states and 20039 transitions. [2021-06-05 22:33:34,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:34,279 INFO L276 IsEmpty]: Start isEmpty. Operand 4502 states and 20039 transitions. [2021-06-05 22:33:34,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:33:34,286 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:34,286 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:34,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-06-05 22:33:34,486 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:34,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:34,487 INFO L82 PathProgramCache]: Analyzing trace with hash -902206568, now seen corresponding path program 3 times [2021-06-05 22:33:34,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:34,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62195168] [2021-06-05 22:33:34,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:34,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:34,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:34,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:34,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62195168] [2021-06-05 22:33:34,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62195168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:34,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433765708] [2021-06-05 22:33:34,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:34,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:33:34,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:34,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:33:34,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:34,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:33:34,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:33:34,858 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:34,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 34 [2021-06-05 22:33:34,859 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:34,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:34,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:34,879 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:92 [2021-06-05 22:33:35,058 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:35,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433765708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:35,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:35,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-05 22:33:35,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345626483] [2021-06-05 22:33:35,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:33:35,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:35,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:33:35,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:33:35,059 INFO L87 Difference]: Start difference. First operand 4502 states and 20039 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:36,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:36,787 INFO L93 Difference]: Finished difference Result 5488 states and 23896 transitions. [2021-06-05 22:33:36,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 22:33:36,787 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:33:36,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:36,798 INFO L225 Difference]: With dead ends: 5488 [2021-06-05 22:33:36,799 INFO L226 Difference]: Without dead ends: 5338 [2021-06-05 22:33:36,799 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 1102.6ms TimeCoverageRelationStatistics Valid=169, Invalid=1313, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:33:36,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5338 states. [2021-06-05 22:33:36,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5338 to 4491. [2021-06-05 22:33:36,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4491 states, 4490 states have (on average 4.4523385300668155) internal successors, (19991), 4490 states have internal predecessors, (19991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:36,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4491 states to 4491 states and 19991 transitions. [2021-06-05 22:33:36,874 INFO L78 Accepts]: Start accepts. Automaton has 4491 states and 19991 transitions. Word has length 30 [2021-06-05 22:33:36,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:36,874 INFO L482 AbstractCegarLoop]: Abstraction has 4491 states and 19991 transitions. [2021-06-05 22:33:36,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:36,874 INFO L276 IsEmpty]: Start isEmpty. Operand 4491 states and 19991 transitions. [2021-06-05 22:33:36,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:33:36,881 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:36,881 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:37,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable423,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:37,082 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:37,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:37,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1423372772, now seen corresponding path program 21 times [2021-06-05 22:33:37,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:37,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029105927] [2021-06-05 22:33:37,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:37,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:37,257 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:37,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:37,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029105927] [2021-06-05 22:33:37,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029105927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:37,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962894810] [2021-06-05 22:33:37,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:37,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:33:37,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:37,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:33:37,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:37,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:33:37,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:33:37,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:33:37,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 22:33:37,513 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:37,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:37,520 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:37,520 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 22:33:37,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:37,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962894810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:37,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:37,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 22:33:37,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619009130] [2021-06-05 22:33:37,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:33:37,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:37,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:33:37,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:33:37,565 INFO L87 Difference]: Start difference. First operand 4491 states and 19991 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:38,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:38,372 INFO L93 Difference]: Finished difference Result 4980 states and 21922 transitions. [2021-06-05 22:33:38,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 22:33:38,373 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:33:38,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:38,383 INFO L225 Difference]: With dead ends: 4980 [2021-06-05 22:33:38,383 INFO L226 Difference]: Without dead ends: 4907 [2021-06-05 22:33:38,383 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 497.9ms TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:33:38,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4907 states. [2021-06-05 22:33:38,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4907 to 4503. [2021-06-05 22:33:38,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4503 states, 4502 states have (on average 4.451577076854731) internal successors, (20041), 4502 states have internal predecessors, (20041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:38,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4503 states to 4503 states and 20041 transitions. [2021-06-05 22:33:38,456 INFO L78 Accepts]: Start accepts. Automaton has 4503 states and 20041 transitions. Word has length 30 [2021-06-05 22:33:38,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:38,456 INFO L482 AbstractCegarLoop]: Abstraction has 4503 states and 20041 transitions. [2021-06-05 22:33:38,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:38,456 INFO L276 IsEmpty]: Start isEmpty. Operand 4503 states and 20041 transitions. [2021-06-05 22:33:38,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:33:38,463 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:38,463 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:38,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable430,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:38,663 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:38,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:38,664 INFO L82 PathProgramCache]: Analyzing trace with hash -802888706, now seen corresponding path program 22 times [2021-06-05 22:33:38,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:38,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505625448] [2021-06-05 22:33:38,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:38,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:38,831 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:38,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:38,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505625448] [2021-06-05 22:33:38,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505625448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:38,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111725054] [2021-06-05 22:33:38,831 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:38,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:33:38,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:38,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:33:38,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:39,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:33:39,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:33:39,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:33:39,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 22:33:39,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:39,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:39,048 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:39,048 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 22:33:39,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:39,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111725054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:39,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:39,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-06-05 22:33:39,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223684161] [2021-06-05 22:33:39,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:33:39,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:39,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:33:39,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:33:39,077 INFO L87 Difference]: Start difference. First operand 4503 states and 20041 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:39,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:39,799 INFO L93 Difference]: Finished difference Result 5023 states and 22112 transitions. [2021-06-05 22:33:39,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 22:33:39,799 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:33:39,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:39,809 INFO L225 Difference]: With dead ends: 5023 [2021-06-05 22:33:39,810 INFO L226 Difference]: Without dead ends: 4957 [2021-06-05 22:33:39,810 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 467.2ms TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:33:39,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4957 states. [2021-06-05 22:33:39,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4957 to 4497. [2021-06-05 22:33:39,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4497 states, 4496 states have (on average 4.452179715302491) internal successors, (20017), 4496 states have internal predecessors, (20017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:39,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4497 states to 4497 states and 20017 transitions. [2021-06-05 22:33:39,883 INFO L78 Accepts]: Start accepts. Automaton has 4497 states and 20017 transitions. Word has length 30 [2021-06-05 22:33:39,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:39,883 INFO L482 AbstractCegarLoop]: Abstraction has 4497 states and 20017 transitions. [2021-06-05 22:33:39,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:39,883 INFO L276 IsEmpty]: Start isEmpty. Operand 4497 states and 20017 transitions. [2021-06-05 22:33:39,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:33:39,890 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:39,890 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:40,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable431 [2021-06-05 22:33:40,091 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:40,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:40,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1558152092, now seen corresponding path program 23 times [2021-06-05 22:33:40,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:40,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620119630] [2021-06-05 22:33:40,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:40,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:40,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:40,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:40,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620119630] [2021-06-05 22:33:40,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620119630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:40,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820152108] [2021-06-05 22:33:40,300 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:40,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:33:40,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:40,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:33:40,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:40,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:33:40,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:33:40,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:33:40,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 22:33:40,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:40,617 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:40,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:40,618 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:11 [2021-06-05 22:33:40,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:40,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820152108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:40,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:40,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 22:33:40,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197848501] [2021-06-05 22:33:40,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:33:40,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:40,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:33:40,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:33:40,659 INFO L87 Difference]: Start difference. First operand 4497 states and 20017 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:41,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:41,682 INFO L93 Difference]: Finished difference Result 5389 states and 23553 transitions. [2021-06-05 22:33:41,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:33:41,682 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:33:41,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:41,693 INFO L225 Difference]: With dead ends: 5389 [2021-06-05 22:33:41,693 INFO L226 Difference]: Without dead ends: 5325 [2021-06-05 22:33:41,693 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 768.2ms TimeCoverageRelationStatistics Valid=192, Invalid=1068, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:33:41,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5325 states. [2021-06-05 22:33:41,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5325 to 4496. [2021-06-05 22:33:41,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4496 states, 4495 states have (on average 4.452725250278087) internal successors, (20015), 4495 states have internal predecessors, (20015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:41,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4496 states to 4496 states and 20015 transitions. [2021-06-05 22:33:41,765 INFO L78 Accepts]: Start accepts. Automaton has 4496 states and 20015 transitions. Word has length 30 [2021-06-05 22:33:41,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:41,765 INFO L482 AbstractCegarLoop]: Abstraction has 4496 states and 20015 transitions. [2021-06-05 22:33:41,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:41,766 INFO L276 IsEmpty]: Start isEmpty. Operand 4496 states and 20015 transitions. [2021-06-05 22:33:41,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:33:41,772 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:41,772 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:41,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-06-05 22:33:41,973 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:41,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:41,973 INFO L82 PathProgramCache]: Analyzing trace with hash 609639870, now seen corresponding path program 24 times [2021-06-05 22:33:41,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:41,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379249358] [2021-06-05 22:33:41,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:41,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:42,170 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:42,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:42,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379249358] [2021-06-05 22:33:42,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379249358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:42,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833632798] [2021-06-05 22:33:42,171 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:42,206 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:33:42,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:42,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:33:42,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:42,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:33:42,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:33:42,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:33:42,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 22:33:42,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:42,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:42,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:42,362 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-05 22:33:42,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:42,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833632798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:42,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:42,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-05 22:33:42,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683411115] [2021-06-05 22:33:42,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:33:42,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:42,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:33:42,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:33:42,431 INFO L87 Difference]: Start difference. First operand 4496 states and 20015 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:43,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:43,489 INFO L93 Difference]: Finished difference Result 4928 states and 21719 transitions. [2021-06-05 22:33:43,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:33:43,489 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:33:43,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:43,499 INFO L225 Difference]: With dead ends: 4928 [2021-06-05 22:33:43,499 INFO L226 Difference]: Without dead ends: 4855 [2021-06-05 22:33:43,499 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 757.7ms TimeCoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:33:43,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4855 states. [2021-06-05 22:33:43,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4855 to 4508. [2021-06-05 22:33:43,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4508 states, 4507 states have (on average 4.452185489238961) internal successors, (20066), 4507 states have internal predecessors, (20066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:43,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4508 states to 4508 states and 20066 transitions. [2021-06-05 22:33:43,570 INFO L78 Accepts]: Start accepts. Automaton has 4508 states and 20066 transitions. Word has length 30 [2021-06-05 22:33:43,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:43,570 INFO L482 AbstractCegarLoop]: Abstraction has 4508 states and 20066 transitions. [2021-06-05 22:33:43,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:43,570 INFO L276 IsEmpty]: Start isEmpty. Operand 4508 states and 20066 transitions. [2021-06-05 22:33:43,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:33:43,576 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:43,577 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:43,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-06-05 22:33:43,777 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:43,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:43,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1875173478, now seen corresponding path program 25 times [2021-06-05 22:33:43,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:43,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565754679] [2021-06-05 22:33:43,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:43,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:43,965 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:43,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:43,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565754679] [2021-06-05 22:33:43,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565754679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:43,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330657214] [2021-06-05 22:33:43,965 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:44,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:44,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:33:44,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:44,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:33:44,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:33:44,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:33:44,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 22:33:44,149 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:44,156 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:44,157 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:44,157 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-05 22:33:44,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:44,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330657214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:44,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:44,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-05 22:33:44,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103105] [2021-06-05 22:33:44,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:33:44,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:44,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:33:44,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:33:44,227 INFO L87 Difference]: Start difference. First operand 4508 states and 20066 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:45,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:45,185 INFO L93 Difference]: Finished difference Result 5020 states and 22117 transitions. [2021-06-05 22:33:45,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:33:45,185 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:33:45,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:45,195 INFO L225 Difference]: With dead ends: 5020 [2021-06-05 22:33:45,195 INFO L226 Difference]: Without dead ends: 4945 [2021-06-05 22:33:45,196 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 659.3ms TimeCoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2021-06-05 22:33:45,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4945 states. [2021-06-05 22:33:45,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4945 to 4499. [2021-06-05 22:33:45,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4499 states, 4498 states have (on average 4.452645620275678) internal successors, (20028), 4498 states have internal predecessors, (20028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:45,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4499 states to 4499 states and 20028 transitions. [2021-06-05 22:33:45,271 INFO L78 Accepts]: Start accepts. Automaton has 4499 states and 20028 transitions. Word has length 30 [2021-06-05 22:33:45,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:45,271 INFO L482 AbstractCegarLoop]: Abstraction has 4499 states and 20028 transitions. [2021-06-05 22:33:45,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:45,271 INFO L276 IsEmpty]: Start isEmpty. Operand 4499 states and 20028 transitions. [2021-06-05 22:33:45,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:33:45,278 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:45,278 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:45,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable434,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:45,479 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:45,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:45,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1940963420, now seen corresponding path program 26 times [2021-06-05 22:33:45,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:45,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804907095] [2021-06-05 22:33:45,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:45,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:45,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:45,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:45,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804907095] [2021-06-05 22:33:45,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804907095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:45,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500351503] [2021-06-05 22:33:45,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:45,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:33:45,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:45,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:33:45,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:45,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:33:45,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:33:45,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:33:45,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 22:33:45,966 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:45,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:45,975 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:45,975 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-05 22:33:46,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:46,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500351503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:46,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:46,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-05 22:33:46,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650232262] [2021-06-05 22:33:46,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:33:46,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:46,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:33:46,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:33:46,044 INFO L87 Difference]: Start difference. First operand 4499 states and 20028 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:46,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:46,900 INFO L93 Difference]: Finished difference Result 4919 states and 21677 transitions. [2021-06-05 22:33:46,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:33:46,900 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:33:46,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:46,910 INFO L225 Difference]: With dead ends: 4919 [2021-06-05 22:33:46,910 INFO L226 Difference]: Without dead ends: 4846 [2021-06-05 22:33:46,910 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 660.9ms TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:33:46,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4846 states. [2021-06-05 22:33:46,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4846 to 4505. [2021-06-05 22:33:46,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4505 states, 4504 states have (on average 4.452042628774422) internal successors, (20052), 4504 states have internal predecessors, (20052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:46,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4505 states to 4505 states and 20052 transitions. [2021-06-05 22:33:46,981 INFO L78 Accepts]: Start accepts. Automaton has 4505 states and 20052 transitions. Word has length 30 [2021-06-05 22:33:46,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:46,981 INFO L482 AbstractCegarLoop]: Abstraction has 4505 states and 20052 transitions. [2021-06-05 22:33:46,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:46,981 INFO L276 IsEmpty]: Start isEmpty. Operand 4505 states and 20052 transitions. [2021-06-05 22:33:46,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:33:46,987 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:46,987 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:47,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable435 [2021-06-05 22:33:47,188 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:47,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:47,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1320479354, now seen corresponding path program 27 times [2021-06-05 22:33:47,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:47,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303777867] [2021-06-05 22:33:47,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:47,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:47,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:47,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:47,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303777867] [2021-06-05 22:33:47,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303777867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:47,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047206760] [2021-06-05 22:33:47,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:47,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:33:47,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:47,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:33:47,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:47,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:33:47,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:33:47,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:33:47,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 22:33:47,580 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:47,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:47,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:47,588 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-05 22:33:47,637 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:47,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047206760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:47,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:47,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 20 [2021-06-05 22:33:47,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840949625] [2021-06-05 22:33:47,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:33:47,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:47,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:33:47,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:33:47,638 INFO L87 Difference]: Start difference. First operand 4505 states and 20052 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:48,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:48,275 INFO L93 Difference]: Finished difference Result 5027 states and 22131 transitions. [2021-06-05 22:33:48,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 22:33:48,275 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:33:48,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:48,286 INFO L225 Difference]: With dead ends: 5027 [2021-06-05 22:33:48,286 INFO L226 Difference]: Without dead ends: 4961 [2021-06-05 22:33:48,286 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 494.7ms TimeCoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:33:48,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4961 states. [2021-06-05 22:33:48,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4961 to 4499. [2021-06-05 22:33:48,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4499 states, 4498 states have (on average 4.452645620275678) internal successors, (20028), 4498 states have internal predecessors, (20028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:48,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4499 states to 4499 states and 20028 transitions. [2021-06-05 22:33:48,361 INFO L78 Accepts]: Start accepts. Automaton has 4499 states and 20028 transitions. Word has length 30 [2021-06-05 22:33:48,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:48,361 INFO L482 AbstractCegarLoop]: Abstraction has 4499 states and 20028 transitions. [2021-06-05 22:33:48,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:48,361 INFO L276 IsEmpty]: Start isEmpty. Operand 4499 states and 20028 transitions. [2021-06-05 22:33:48,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:33:48,368 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:48,368 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:48,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable436 [2021-06-05 22:33:48,569 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:48,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:48,569 INFO L82 PathProgramCache]: Analyzing trace with hash -549216698, now seen corresponding path program 28 times [2021-06-05 22:33:48,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:48,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572696336] [2021-06-05 22:33:48,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:48,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:48,826 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:48,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:48,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572696336] [2021-06-05 22:33:48,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572696336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:48,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779741393] [2021-06-05 22:33:48,827 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:48,871 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:33:48,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:48,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:33:48,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:49,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:33:49,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:33:49,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:33:49,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 22:33:49,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:49,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:49,035 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:49,035 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-05 22:33:49,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:49,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779741393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:49,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:49,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 22:33:49,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303527979] [2021-06-05 22:33:49,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:33:49,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:49,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:33:49,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:33:49,119 INFO L87 Difference]: Start difference. First operand 4499 states and 20028 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:50,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:50,095 INFO L93 Difference]: Finished difference Result 5034 states and 22167 transitions. [2021-06-05 22:33:50,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:33:50,095 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:33:50,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:50,105 INFO L225 Difference]: With dead ends: 5034 [2021-06-05 22:33:50,105 INFO L226 Difference]: Without dead ends: 4963 [2021-06-05 22:33:50,105 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 824.0ms TimeCoverageRelationStatistics Valid=161, Invalid=961, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:33:50,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4963 states. [2021-06-05 22:33:50,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4963 to 4499. [2021-06-05 22:33:50,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4499 states, 4498 states have (on average 4.452645620275678) internal successors, (20028), 4498 states have internal predecessors, (20028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:50,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4499 states to 4499 states and 20028 transitions. [2021-06-05 22:33:50,178 INFO L78 Accepts]: Start accepts. Automaton has 4499 states and 20028 transitions. Word has length 30 [2021-06-05 22:33:50,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:50,178 INFO L482 AbstractCegarLoop]: Abstraction has 4499 states and 20028 transitions. [2021-06-05 22:33:50,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:50,178 INFO L276 IsEmpty]: Start isEmpty. Operand 4499 states and 20028 transitions. [2021-06-05 22:33:50,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:33:50,185 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:50,185 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:50,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable437,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:50,385 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:50,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:50,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1185683552, now seen corresponding path program 29 times [2021-06-05 22:33:50,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:50,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120316881] [2021-06-05 22:33:50,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:50,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:50,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:50,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:50,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120316881] [2021-06-05 22:33:50,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120316881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:50,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282301613] [2021-06-05 22:33:50,599 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:50,635 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:33:50,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:50,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:33:50,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:50,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:33:50,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:33:50,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:33:50,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 22:33:50,810 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:50,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:50,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:50,819 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-05 22:33:50,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:50,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282301613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:50,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:50,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 22:33:50,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498803829] [2021-06-05 22:33:50,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:33:50,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:50,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:33:50,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:33:50,940 INFO L87 Difference]: Start difference. First operand 4499 states and 20028 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:51,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:51,848 INFO L93 Difference]: Finished difference Result 5031 states and 22146 transitions. [2021-06-05 22:33:51,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:33:51,848 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:33:51,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:51,862 INFO L225 Difference]: With dead ends: 5031 [2021-06-05 22:33:51,862 INFO L226 Difference]: Without dead ends: 4967 [2021-06-05 22:33:51,862 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 707.0ms TimeCoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2021-06-05 22:33:51,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4967 states. [2021-06-05 22:33:51,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4967 to 4496. [2021-06-05 22:33:51,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4496 states, 4495 states have (on average 4.452725250278087) internal successors, (20015), 4495 states have internal predecessors, (20015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:51,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4496 states to 4496 states and 20015 transitions. [2021-06-05 22:33:51,945 INFO L78 Accepts]: Start accepts. Automaton has 4496 states and 20015 transitions. Word has length 30 [2021-06-05 22:33:51,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:51,946 INFO L482 AbstractCegarLoop]: Abstraction has 4496 states and 20015 transitions. [2021-06-05 22:33:51,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:51,946 INFO L276 IsEmpty]: Start isEmpty. Operand 4496 states and 20015 transitions. [2021-06-05 22:33:51,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:33:51,952 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:51,952 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:52,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable438 [2021-06-05 22:33:52,154 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:52,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:52,154 INFO L82 PathProgramCache]: Analyzing trace with hash -2049698712, now seen corresponding path program 4 times [2021-06-05 22:33:52,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:52,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936181464] [2021-06-05 22:33:52,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:52,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:52,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:52,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:52,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936181464] [2021-06-05 22:33:52,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936181464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:52,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941736154] [2021-06-05 22:33:52,312 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:52,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:33:52,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:52,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:33:52,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:52,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:33:52,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:33:52,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:33:52,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 22:33:52,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:52,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:52,615 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:52,616 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:11 [2021-06-05 22:33:52,648 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:52,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941736154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:52,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:52,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 22:33:52,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037007226] [2021-06-05 22:33:52,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:33:52,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:52,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:33:52,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:33:52,650 INFO L87 Difference]: Start difference. First operand 4496 states and 20015 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:53,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:53,295 INFO L93 Difference]: Finished difference Result 5151 states and 22618 transitions. [2021-06-05 22:33:53,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:33:53,295 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:33:53,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:53,306 INFO L225 Difference]: With dead ends: 5151 [2021-06-05 22:33:53,306 INFO L226 Difference]: Without dead ends: 5080 [2021-06-05 22:33:53,306 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 473.6ms TimeCoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:33:53,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5080 states. [2021-06-05 22:33:53,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5080 to 4506. [2021-06-05 22:33:53,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4506 states, 4505 states have (on average 4.45527192008879) internal successors, (20071), 4505 states have internal predecessors, (20071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:53,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4506 states to 4506 states and 20071 transitions. [2021-06-05 22:33:53,379 INFO L78 Accepts]: Start accepts. Automaton has 4506 states and 20071 transitions. Word has length 30 [2021-06-05 22:33:53,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:53,379 INFO L482 AbstractCegarLoop]: Abstraction has 4506 states and 20071 transitions. [2021-06-05 22:33:53,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:53,379 INFO L276 IsEmpty]: Start isEmpty. Operand 4506 states and 20071 transitions. [2021-06-05 22:33:53,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:33:53,386 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:53,386 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:53,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable439,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:53,586 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:53,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:53,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1184043260, now seen corresponding path program 30 times [2021-06-05 22:33:53,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:53,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308395307] [2021-06-05 22:33:53,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:53,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:53,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:53,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:53,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308395307] [2021-06-05 22:33:53,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308395307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:53,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566649502] [2021-06-05 22:33:53,775 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:53,810 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:33:53,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:53,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:33:53,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:54,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:33:54,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:33:54,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:33:54,078 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:54,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 47 [2021-06-05 22:33:54,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 22:33:54,110 INFO L628 ElimStorePlain]: treesize reduction 14, result has 72.0 percent of original size [2021-06-05 22:33:54,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:54,113 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:50 [2021-06-05 22:33:54,218 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:54,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566649502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:54,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:54,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:33:54,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015404952] [2021-06-05 22:33:54,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:33:54,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:54,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:33:54,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:33:54,219 INFO L87 Difference]: Start difference. First operand 4506 states and 20071 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:56,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:56,372 INFO L93 Difference]: Finished difference Result 5292 states and 23016 transitions. [2021-06-05 22:33:56,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 22:33:56,372 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:33:56,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:56,383 INFO L225 Difference]: With dead ends: 5292 [2021-06-05 22:33:56,383 INFO L226 Difference]: Without dead ends: 5160 [2021-06-05 22:33:56,383 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 1724.4ms TimeCoverageRelationStatistics Valid=355, Invalid=2401, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 22:33:56,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5160 states. [2021-06-05 22:33:56,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5160 to 4506. [2021-06-05 22:33:56,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4506 states, 4505 states have (on average 4.45527192008879) internal successors, (20071), 4505 states have internal predecessors, (20071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:56,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4506 states to 4506 states and 20071 transitions. [2021-06-05 22:33:56,453 INFO L78 Accepts]: Start accepts. Automaton has 4506 states and 20071 transitions. Word has length 30 [2021-06-05 22:33:56,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:56,454 INFO L482 AbstractCegarLoop]: Abstraction has 4506 states and 20071 transitions. [2021-06-05 22:33:56,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:56,454 INFO L276 IsEmpty]: Start isEmpty. Operand 4506 states and 20071 transitions. [2021-06-05 22:33:56,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:33:56,460 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:56,460 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:56,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:56,661 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:56,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:56,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1181268604, now seen corresponding path program 31 times [2021-06-05 22:33:56,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:56,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841504479] [2021-06-05 22:33:56,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:56,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:56,858 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:56,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:56,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841504479] [2021-06-05 22:33:56,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841504479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:56,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941106263] [2021-06-05 22:33:56,858 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:56,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:56,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:33:56,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:57,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:33:57,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:33:57,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:33:57,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 22:33:57,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:33:57,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:57,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:57,073 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:14 [2021-06-05 22:33:57,130 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:57,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941106263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:57,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:57,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 22:33:57,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434466691] [2021-06-05 22:33:57,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:33:57,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:57,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:33:57,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:33:57,130 INFO L87 Difference]: Start difference. First operand 4506 states and 20071 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:58,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:33:58,454 INFO L93 Difference]: Finished difference Result 5489 states and 24001 transitions. [2021-06-05 22:33:58,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:33:58,455 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:33:58,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:33:58,465 INFO L225 Difference]: With dead ends: 5489 [2021-06-05 22:33:58,465 INFO L226 Difference]: Without dead ends: 5394 [2021-06-05 22:33:58,466 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 812.8ms TimeCoverageRelationStatistics Valid=242, Invalid=1164, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:33:58,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5394 states. [2021-06-05 22:33:58,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5394 to 4516. [2021-06-05 22:33:58,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4516 states, 4515 states have (on average 4.453599114064231) internal successors, (20108), 4515 states have internal predecessors, (20108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:58,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4516 states to 4516 states and 20108 transitions. [2021-06-05 22:33:58,537 INFO L78 Accepts]: Start accepts. Automaton has 4516 states and 20108 transitions. Word has length 30 [2021-06-05 22:33:58,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:33:58,537 INFO L482 AbstractCegarLoop]: Abstraction has 4516 states and 20108 transitions. [2021-06-05 22:33:58,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:33:58,537 INFO L276 IsEmpty]: Start isEmpty. Operand 4516 states and 20108 transitions. [2021-06-05 22:33:58,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:33:58,544 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:33:58,544 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:33:58,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable445,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:58,744 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:33:58,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:33:58,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1687614870, now seen corresponding path program 32 times [2021-06-05 22:33:58,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:33:58,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920342775] [2021-06-05 22:33:58,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:33:58,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:33:58,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:58,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:33:58,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920342775] [2021-06-05 22:33:58,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920342775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:58,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609281411] [2021-06-05 22:33:58,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:33:58,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:33:58,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:33:58,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:33:58,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:33:59,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:33:59,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:33:59,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:33:59,204 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:33:59,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 47 [2021-06-05 22:33:59,211 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 22:33:59,237 INFO L628 ElimStorePlain]: treesize reduction 14, result has 73.6 percent of original size [2021-06-05 22:33:59,240 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:33:59,240 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:53 [2021-06-05 22:33:59,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:33:59,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609281411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:33:59,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:33:59,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 22:33:59,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156631136] [2021-06-05 22:33:59,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:33:59,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:33:59,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:33:59,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:33:59,377 INFO L87 Difference]: Start difference. First operand 4516 states and 20108 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:01,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:01,524 INFO L93 Difference]: Finished difference Result 5212 states and 22716 transitions. [2021-06-05 22:34:01,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 22:34:01,524 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:34:01,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:01,534 INFO L225 Difference]: With dead ends: 5212 [2021-06-05 22:34:01,534 INFO L226 Difference]: Without dead ends: 5080 [2021-06-05 22:34:01,534 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 1630.5ms TimeCoverageRelationStatistics Valid=333, Invalid=2117, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 22:34:01,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5080 states. [2021-06-05 22:34:01,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5080 to 4507. [2021-06-05 22:34:01,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4507 states, 4506 states have (on average 4.455392809587217) internal successors, (20076), 4506 states have internal predecessors, (20076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:01,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4507 states to 4507 states and 20076 transitions. [2021-06-05 22:34:01,604 INFO L78 Accepts]: Start accepts. Automaton has 4507 states and 20076 transitions. Word has length 30 [2021-06-05 22:34:01,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:01,604 INFO L482 AbstractCegarLoop]: Abstraction has 4507 states and 20076 transitions. [2021-06-05 22:34:01,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:01,604 INFO L276 IsEmpty]: Start isEmpty. Operand 4507 states and 20076 transitions. [2021-06-05 22:34:01,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:34:01,611 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:01,611 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:01,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable446 [2021-06-05 22:34:01,811 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:01,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:01,812 INFO L82 PathProgramCache]: Analyzing trace with hash -30948974, now seen corresponding path program 33 times [2021-06-05 22:34:01,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:01,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374077762] [2021-06-05 22:34:01,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:01,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:02,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:02,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:02,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374077762] [2021-06-05 22:34:02,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374077762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:02,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929540592] [2021-06-05 22:34:02,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:02,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:34:02,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:02,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:34:02,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:02,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:34:02,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:34:02,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:34:02,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 22:34:02,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:02,384 INFO L628 ElimStorePlain]: treesize reduction 3, result has 88.0 percent of original size [2021-06-05 22:34:02,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:02,385 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:11 [2021-06-05 22:34:02,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:02,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929540592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:02,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:02,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 24 [2021-06-05 22:34:02,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8717932] [2021-06-05 22:34:02,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:34:02,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:02,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:34:02,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:34:02,433 INFO L87 Difference]: Start difference. First operand 4507 states and 20076 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:03,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:03,551 INFO L93 Difference]: Finished difference Result 4932 states and 21671 transitions. [2021-06-05 22:34:03,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:34:03,552 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:34:03,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:03,561 INFO L225 Difference]: With dead ends: 4932 [2021-06-05 22:34:03,562 INFO L226 Difference]: Without dead ends: 4868 [2021-06-05 22:34:03,562 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 771.7ms TimeCoverageRelationStatistics Valid=131, Invalid=1129, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:34:03,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4868 states. [2021-06-05 22:34:03,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4868 to 4514. [2021-06-05 22:34:03,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4514 states, 4513 states have (on average 4.453800132949258) internal successors, (20100), 4513 states have internal predecessors, (20100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:03,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4514 states to 4514 states and 20100 transitions. [2021-06-05 22:34:03,627 INFO L78 Accepts]: Start accepts. Automaton has 4514 states and 20100 transitions. Word has length 30 [2021-06-05 22:34:03,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:03,628 INFO L482 AbstractCegarLoop]: Abstraction has 4514 states and 20100 transitions. [2021-06-05 22:34:03,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:03,628 INFO L276 IsEmpty]: Start isEmpty. Operand 4514 states and 20100 transitions. [2021-06-05 22:34:03,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:34:03,634 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:03,634 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:03,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable452,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:03,835 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:03,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:03,835 INFO L82 PathProgramCache]: Analyzing trace with hash 854849306, now seen corresponding path program 34 times [2021-06-05 22:34:03,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:03,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885512591] [2021-06-05 22:34:03,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:03,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:04,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:04,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:04,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885512591] [2021-06-05 22:34:04,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885512591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:04,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825001340] [2021-06-05 22:34:04,037 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:04,086 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:34:04,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:04,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:34:04,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:04,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:34:04,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:34:04,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:34:04,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 22:34:04,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:04,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:04,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:04,335 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:14 [2021-06-05 22:34:04,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:04,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825001340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:04,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:04,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-06-05 22:34:04,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860352358] [2021-06-05 22:34:04,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:34:04,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:04,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:34:04,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:34:04,402 INFO L87 Difference]: Start difference. First operand 4514 states and 20100 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:05,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:05,479 INFO L93 Difference]: Finished difference Result 5116 states and 22500 transitions. [2021-06-05 22:34:05,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:34:05,480 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:34:05,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:05,490 INFO L225 Difference]: With dead ends: 5116 [2021-06-05 22:34:05,491 INFO L226 Difference]: Without dead ends: 5052 [2021-06-05 22:34:05,491 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 686.0ms TimeCoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:34:05,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5052 states. [2021-06-05 22:34:05,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5052 to 4488. [2021-06-05 22:34:05,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4488 states, 4487 states have (on average 4.46021840873635) internal successors, (20013), 4487 states have internal predecessors, (20013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:05,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4488 states to 4488 states and 20013 transitions. [2021-06-05 22:34:05,560 INFO L78 Accepts]: Start accepts. Automaton has 4488 states and 20013 transitions. Word has length 30 [2021-06-05 22:34:05,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:05,561 INFO L482 AbstractCegarLoop]: Abstraction has 4488 states and 20013 transitions. [2021-06-05 22:34:05,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:05,561 INFO L276 IsEmpty]: Start isEmpty. Operand 4488 states and 20013 transitions. [2021-06-05 22:34:05,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:34:05,567 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:05,567 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:05,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable453 [2021-06-05 22:34:05,768 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:05,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:05,768 INFO L82 PathProgramCache]: Analyzing trace with hash 528698014, now seen corresponding path program 35 times [2021-06-05 22:34:05,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:05,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891010251] [2021-06-05 22:34:05,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:05,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:05,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:05,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:05,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891010251] [2021-06-05 22:34:05,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891010251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:05,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209663121] [2021-06-05 22:34:05,952 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:05,989 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:34:05,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:05,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:34:05,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:06,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:34:06,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:34:06,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:34:06,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 22:34:06,198 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:06,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:06,205 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:06,205 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:11 [2021-06-05 22:34:06,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:06,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209663121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:06,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:06,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 22:34:06,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303525707] [2021-06-05 22:34:06,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:34:06,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:06,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:34:06,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:34:06,257 INFO L87 Difference]: Start difference. First operand 4488 states and 20013 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:07,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:07,474 INFO L93 Difference]: Finished difference Result 5478 states and 23917 transitions. [2021-06-05 22:34:07,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 22:34:07,475 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:34:07,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:07,485 INFO L225 Difference]: With dead ends: 5478 [2021-06-05 22:34:07,485 INFO L226 Difference]: Without dead ends: 5414 [2021-06-05 22:34:07,485 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 801.2ms TimeCoverageRelationStatistics Valid=201, Invalid=1059, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:34:07,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5414 states. [2021-06-05 22:34:07,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5414 to 4481. [2021-06-05 22:34:07,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4481 states, 4480 states have (on average 4.4618303571428575) internal successors, (19989), 4480 states have internal predecessors, (19989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:07,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4481 states to 4481 states and 19989 transitions. [2021-06-05 22:34:07,557 INFO L78 Accepts]: Start accepts. Automaton has 4481 states and 19989 transitions. Word has length 30 [2021-06-05 22:34:07,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:07,557 INFO L482 AbstractCegarLoop]: Abstraction has 4481 states and 19989 transitions. [2021-06-05 22:34:07,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:07,557 INFO L276 IsEmpty]: Start isEmpty. Operand 4481 states and 19989 transitions. [2021-06-05 22:34:07,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:34:07,564 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:07,564 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:07,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2021-06-05 22:34:07,764 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:07,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:07,765 INFO L82 PathProgramCache]: Analyzing trace with hash 855600944, now seen corresponding path program 57 times [2021-06-05 22:34:07,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:07,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923847751] [2021-06-05 22:34:07,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:07,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:07,922 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:07,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:07,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923847751] [2021-06-05 22:34:07,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923847751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:07,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107594713] [2021-06-05 22:34:07,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:07,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:34:07,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:07,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:34:07,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:08,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 22:34:08,096 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:08,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:08,098 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:08,098 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 22:34:08,131 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:08,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107594713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:08,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:08,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:34:08,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057008617] [2021-06-05 22:34:08,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:34:08,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:08,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:34:08,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:34:08,132 INFO L87 Difference]: Start difference. First operand 4481 states and 19989 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:09,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:09,586 INFO L93 Difference]: Finished difference Result 6523 states and 28088 transitions. [2021-06-05 22:34:09,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 22:34:09,586 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:34:09,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:09,599 INFO L225 Difference]: With dead ends: 6523 [2021-06-05 22:34:09,600 INFO L226 Difference]: Without dead ends: 6225 [2021-06-05 22:34:09,600 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 809 ImplicationChecksByTransitivity, 951.7ms TimeCoverageRelationStatistics Valid=500, Invalid=2256, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 22:34:09,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6225 states. [2021-06-05 22:34:09,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6225 to 4543. [2021-06-05 22:34:09,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4543 states, 4542 states have (on average 4.454205195948921) internal successors, (20231), 4542 states have internal predecessors, (20231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:09,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4543 states to 4543 states and 20231 transitions. [2021-06-05 22:34:09,676 INFO L78 Accepts]: Start accepts. Automaton has 4543 states and 20231 transitions. Word has length 30 [2021-06-05 22:34:09,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:09,676 INFO L482 AbstractCegarLoop]: Abstraction has 4543 states and 20231 transitions. [2021-06-05 22:34:09,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:09,676 INFO L276 IsEmpty]: Start isEmpty. Operand 4543 states and 20231 transitions. [2021-06-05 22:34:09,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:34:09,683 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:09,683 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:09,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable455 [2021-06-05 22:34:09,884 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:09,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:09,884 INFO L82 PathProgramCache]: Analyzing trace with hash -2134626958, now seen corresponding path program 37 times [2021-06-05 22:34:09,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:09,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531292472] [2021-06-05 22:34:09,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:09,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:10,104 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:10,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:10,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531292472] [2021-06-05 22:34:10,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531292472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:10,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183861803] [2021-06-05 22:34:10,105 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:10,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:10,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:34:10,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:10,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 22:34:10,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:10,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:10,332 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:10,332 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 22:34:10,381 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:10,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183861803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:10,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:10,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:34:10,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538469820] [2021-06-05 22:34:10,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:34:10,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:10,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:34:10,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:34:10,382 INFO L87 Difference]: Start difference. First operand 4543 states and 20231 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:12,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:12,313 INFO L93 Difference]: Finished difference Result 6091 states and 26441 transitions. [2021-06-05 22:34:12,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 22:34:12,314 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:34:12,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:12,326 INFO L225 Difference]: With dead ends: 6091 [2021-06-05 22:34:12,326 INFO L226 Difference]: Without dead ends: 5924 [2021-06-05 22:34:12,326 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 1460.4ms TimeCoverageRelationStatistics Valid=418, Invalid=2032, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 22:34:12,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5924 states. [2021-06-05 22:34:12,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5924 to 4547. [2021-06-05 22:34:12,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4547 states, 4546 states have (on average 4.449846018477783) internal successors, (20229), 4546 states have internal predecessors, (20229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:12,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4547 states to 4547 states and 20229 transitions. [2021-06-05 22:34:12,401 INFO L78 Accepts]: Start accepts. Automaton has 4547 states and 20229 transitions. Word has length 30 [2021-06-05 22:34:12,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:12,401 INFO L482 AbstractCegarLoop]: Abstraction has 4547 states and 20229 transitions. [2021-06-05 22:34:12,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:12,402 INFO L276 IsEmpty]: Start isEmpty. Operand 4547 states and 20229 transitions. [2021-06-05 22:34:12,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:34:12,409 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:12,409 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:12,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable456 [2021-06-05 22:34:12,609 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:12,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:12,609 INFO L82 PathProgramCache]: Analyzing trace with hash 274105212, now seen corresponding path program 58 times [2021-06-05 22:34:12,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:12,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923729448] [2021-06-05 22:34:12,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:12,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:12,772 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:12,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:12,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923729448] [2021-06-05 22:34:12,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923729448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:12,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385157894] [2021-06-05 22:34:12,773 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:12,808 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:34:12,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:12,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:34:12,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:12,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:34:12,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:12,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:12,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:12,921 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:34:12,970 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:12,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385157894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:12,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:12,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:34:12,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792236943] [2021-06-05 22:34:12,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:34:12,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:12,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:34:12,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:34:12,970 INFO L87 Difference]: Start difference. First operand 4547 states and 20229 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:14,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:14,323 INFO L93 Difference]: Finished difference Result 6231 states and 26873 transitions. [2021-06-05 22:34:14,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 22:34:14,323 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:34:14,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:14,335 INFO L225 Difference]: With dead ends: 6231 [2021-06-05 22:34:14,336 INFO L226 Difference]: Without dead ends: 6071 [2021-06-05 22:34:14,336 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 1061.8ms TimeCoverageRelationStatistics Valid=397, Invalid=1765, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 22:34:14,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6071 states. [2021-06-05 22:34:14,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6071 to 4593. [2021-06-05 22:34:14,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4593 states, 4592 states have (on average 4.450783972125436) internal successors, (20438), 4592 states have internal predecessors, (20438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:14,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4593 states to 4593 states and 20438 transitions. [2021-06-05 22:34:14,430 INFO L78 Accepts]: Start accepts. Automaton has 4593 states and 20438 transitions. Word has length 30 [2021-06-05 22:34:14,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:14,430 INFO L482 AbstractCegarLoop]: Abstraction has 4593 states and 20438 transitions. [2021-06-05 22:34:14,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:14,430 INFO L276 IsEmpty]: Start isEmpty. Operand 4593 states and 20438 transitions. [2021-06-05 22:34:14,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:34:14,437 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:14,437 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:14,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable457 [2021-06-05 22:34:14,637 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:14,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:14,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1826877156, now seen corresponding path program 59 times [2021-06-05 22:34:14,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:14,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928962434] [2021-06-05 22:34:14,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:14,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:14,801 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:14,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:14,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928962434] [2021-06-05 22:34:14,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928962434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:14,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775065504] [2021-06-05 22:34:14,801 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:14,836 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:34:14,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:14,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:34:14,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:14,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:34:14,945 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:14,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:14,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:14,948 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:34:14,997 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:14,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775065504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:14,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:14,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:34:14,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198981575] [2021-06-05 22:34:14,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:34:14,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:14,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:34:14,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:34:14,998 INFO L87 Difference]: Start difference. First operand 4593 states and 20438 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:16,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:16,489 INFO L93 Difference]: Finished difference Result 6496 states and 27804 transitions. [2021-06-05 22:34:16,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 22:34:16,489 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:34:16,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:16,503 INFO L225 Difference]: With dead ends: 6496 [2021-06-05 22:34:16,503 INFO L226 Difference]: Without dead ends: 6184 [2021-06-05 22:34:16,503 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 1131.3ms TimeCoverageRelationStatistics Valid=484, Invalid=2066, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 22:34:16,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6184 states. [2021-06-05 22:34:16,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6184 to 4621. [2021-06-05 22:34:16,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4621 states, 4620 states have (on average 4.450432900432901) internal successors, (20561), 4620 states have internal predecessors, (20561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:16,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4621 states to 4621 states and 20561 transitions. [2021-06-05 22:34:16,581 INFO L78 Accepts]: Start accepts. Automaton has 4621 states and 20561 transitions. Word has length 30 [2021-06-05 22:34:16,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:16,581 INFO L482 AbstractCegarLoop]: Abstraction has 4621 states and 20561 transitions. [2021-06-05 22:34:16,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:16,582 INFO L276 IsEmpty]: Start isEmpty. Operand 4621 states and 20561 transitions. [2021-06-05 22:34:16,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:34:16,589 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:16,589 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:16,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable458,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:16,790 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:16,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:16,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1892384642, now seen corresponding path program 38 times [2021-06-05 22:34:16,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:16,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464698986] [2021-06-05 22:34:16,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:16,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:16,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:16,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:16,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464698986] [2021-06-05 22:34:16,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464698986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:16,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601966879] [2021-06-05 22:34:16,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:17,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:34:17,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:17,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:34:17,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:17,136 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:17,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 22:34:17,137 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:17,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:17,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:17,147 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 22:34:17,247 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:17,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601966879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:17,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:17,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:34:17,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904193520] [2021-06-05 22:34:17,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:34:17,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:17,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:34:17,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:34:17,248 INFO L87 Difference]: Start difference. First operand 4621 states and 20561 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:19,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:19,078 INFO L93 Difference]: Finished difference Result 5945 states and 25728 transitions. [2021-06-05 22:34:19,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 22:34:19,079 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:34:19,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:19,091 INFO L225 Difference]: With dead ends: 5945 [2021-06-05 22:34:19,091 INFO L226 Difference]: Without dead ends: 5694 [2021-06-05 22:34:19,092 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 1450.4ms TimeCoverageRelationStatistics Valid=468, Invalid=2612, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 22:34:19,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5694 states. [2021-06-05 22:34:19,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5694 to 4646. [2021-06-05 22:34:19,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4646 states, 4645 states have (on average 4.4443487621097955) internal successors, (20644), 4645 states have internal predecessors, (20644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:19,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4646 states to 4646 states and 20644 transitions. [2021-06-05 22:34:19,172 INFO L78 Accepts]: Start accepts. Automaton has 4646 states and 20644 transitions. Word has length 30 [2021-06-05 22:34:19,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:19,172 INFO L482 AbstractCegarLoop]: Abstraction has 4646 states and 20644 transitions. [2021-06-05 22:34:19,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:19,172 INFO L276 IsEmpty]: Start isEmpty. Operand 4646 states and 20644 transitions. [2021-06-05 22:34:19,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:34:19,180 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:19,180 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:19,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable459 [2021-06-05 22:34:19,380 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:19,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:19,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1006995578, now seen corresponding path program 39 times [2021-06-05 22:34:19,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:19,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709570652] [2021-06-05 22:34:19,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:19,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:19,620 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:19,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:19,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709570652] [2021-06-05 22:34:19,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709570652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:19,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040658437] [2021-06-05 22:34:19,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:19,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:34:19,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:19,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:34:19,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:19,786 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:19,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 22:34:19,788 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:19,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:19,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:19,798 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 22:34:19,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:19,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040658437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:19,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:19,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:34:19,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240682534] [2021-06-05 22:34:19,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:34:19,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:19,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:34:19,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:34:19,898 INFO L87 Difference]: Start difference. First operand 4646 states and 20644 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:21,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:21,786 INFO L93 Difference]: Finished difference Result 6089 states and 26326 transitions. [2021-06-05 22:34:21,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 22:34:21,786 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:34:21,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:21,798 INFO L225 Difference]: With dead ends: 6089 [2021-06-05 22:34:21,798 INFO L226 Difference]: Without dead ends: 5798 [2021-06-05 22:34:21,798 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 1527.1ms TimeCoverageRelationStatistics Valid=524, Invalid=2556, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 22:34:21,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5798 states. [2021-06-05 22:34:21,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5798 to 4637. [2021-06-05 22:34:21,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4637 states, 4636 states have (on average 4.446505608283003) internal successors, (20614), 4636 states have internal predecessors, (20614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:21,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4637 states to 4637 states and 20614 transitions. [2021-06-05 22:34:21,874 INFO L78 Accepts]: Start accepts. Automaton has 4637 states and 20614 transitions. Word has length 30 [2021-06-05 22:34:21,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:21,874 INFO L482 AbstractCegarLoop]: Abstraction has 4637 states and 20614 transitions. [2021-06-05 22:34:21,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:21,874 INFO L276 IsEmpty]: Start isEmpty. Operand 4637 states and 20614 transitions. [2021-06-05 22:34:21,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:34:21,881 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:21,881 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:22,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable462,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:22,082 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:22,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:22,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1221508570, now seen corresponding path program 6 times [2021-06-05 22:34:22,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:22,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800688745] [2021-06-05 22:34:22,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:22,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:22,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:22,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:22,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800688745] [2021-06-05 22:34:22,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800688745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:22,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172038518] [2021-06-05 22:34:22,255 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:22,307 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:34:22,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:22,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:34:22,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:22,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:34:22,483 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:22,486 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:22,487 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:22,487 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:34:22,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:22,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172038518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:22,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:22,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:34:22,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578902246] [2021-06-05 22:34:22,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:34:22,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:22,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:34:22,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:34:22,549 INFO L87 Difference]: Start difference. First operand 4637 states and 20614 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:23,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:23,821 INFO L93 Difference]: Finished difference Result 5984 states and 26045 transitions. [2021-06-05 22:34:23,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 22:34:23,822 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:34:23,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:23,834 INFO L225 Difference]: With dead ends: 5984 [2021-06-05 22:34:23,834 INFO L226 Difference]: Without dead ends: 5866 [2021-06-05 22:34:23,834 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 1016.4ms TimeCoverageRelationStatistics Valid=353, Invalid=1627, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:34:23,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5866 states. [2021-06-05 22:34:23,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5866 to 4672. [2021-06-05 22:34:23,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4672 states, 4671 states have (on average 4.442303575251552) internal successors, (20750), 4671 states have internal predecessors, (20750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:23,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4672 states to 4672 states and 20750 transitions. [2021-06-05 22:34:23,914 INFO L78 Accepts]: Start accepts. Automaton has 4672 states and 20750 transitions. Word has length 30 [2021-06-05 22:34:23,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:23,914 INFO L482 AbstractCegarLoop]: Abstraction has 4672 states and 20750 transitions. [2021-06-05 22:34:23,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:23,914 INFO L276 IsEmpty]: Start isEmpty. Operand 4672 states and 20750 transitions. [2021-06-05 22:34:23,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:34:23,922 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:23,922 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:24,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable465 [2021-06-05 22:34:24,122 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:24,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:24,123 INFO L82 PathProgramCache]: Analyzing trace with hash 501075102, now seen corresponding path program 7 times [2021-06-05 22:34:24,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:24,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325966523] [2021-06-05 22:34:24,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:24,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:24,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:24,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:24,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325966523] [2021-06-05 22:34:24,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325966523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:24,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345974031] [2021-06-05 22:34:24,292 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:24,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:24,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:34:24,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:24,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:34:24,441 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:24,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:24,445 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:24,445 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:34:24,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:24,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345974031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:24,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:24,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:34:24,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808890481] [2021-06-05 22:34:24,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:34:24,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:24,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:34:24,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:34:24,496 INFO L87 Difference]: Start difference. First operand 4672 states and 20750 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:25,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:25,993 INFO L93 Difference]: Finished difference Result 6211 states and 26962 transitions. [2021-06-05 22:34:25,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 22:34:25,993 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:34:25,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:26,005 INFO L225 Difference]: With dead ends: 6211 [2021-06-05 22:34:26,005 INFO L226 Difference]: Without dead ends: 6067 [2021-06-05 22:34:26,006 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 1090.1ms TimeCoverageRelationStatistics Valid=471, Invalid=2079, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 22:34:26,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6067 states. [2021-06-05 22:34:26,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6067 to 4665. [2021-06-05 22:34:26,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4665 states, 4664 states have (on average 4.442109777015437) internal successors, (20718), 4664 states have internal predecessors, (20718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:26,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4665 states to 4665 states and 20718 transitions. [2021-06-05 22:34:26,083 INFO L78 Accepts]: Start accepts. Automaton has 4665 states and 20718 transitions. Word has length 30 [2021-06-05 22:34:26,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:26,083 INFO L482 AbstractCegarLoop]: Abstraction has 4665 states and 20718 transitions. [2021-06-05 22:34:26,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:26,083 INFO L276 IsEmpty]: Start isEmpty. Operand 4665 states and 20718 transitions. [2021-06-05 22:34:26,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:34:26,091 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:26,091 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:26,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 215 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-06-05 22:34:26,291 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:26,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:26,292 INFO L82 PathProgramCache]: Analyzing trace with hash -697029920, now seen corresponding path program 8 times [2021-06-05 22:34:26,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:26,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037257151] [2021-06-05 22:34:26,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:26,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:26,452 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:26,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:26,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037257151] [2021-06-05 22:34:26,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037257151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:26,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335546042] [2021-06-05 22:34:26,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:26,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:34:26,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:26,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:34:26,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:26,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:34:26,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:34:26,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 22:34:26,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:26,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:26,701 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:26,701 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 22:34:26,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:26,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335546042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:26,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:26,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 22:34:26,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016050679] [2021-06-05 22:34:26,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:34:26,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:26,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:34:26,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:34:26,738 INFO L87 Difference]: Start difference. First operand 4665 states and 20718 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:28,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:28,948 INFO L93 Difference]: Finished difference Result 6337 states and 27396 transitions. [2021-06-05 22:34:28,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 22:34:28,948 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:34:28,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:28,961 INFO L225 Difference]: With dead ends: 6337 [2021-06-05 22:34:28,961 INFO L226 Difference]: Without dead ends: 6143 [2021-06-05 22:34:28,961 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 1489.2ms TimeCoverageRelationStatistics Valid=635, Invalid=2905, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 22:34:28,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6143 states. [2021-06-05 22:34:29,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6143 to 4665. [2021-06-05 22:34:29,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4665 states, 4664 states have (on average 4.442109777015437) internal successors, (20718), 4664 states have internal predecessors, (20718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:29,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4665 states to 4665 states and 20718 transitions. [2021-06-05 22:34:29,040 INFO L78 Accepts]: Start accepts. Automaton has 4665 states and 20718 transitions. Word has length 30 [2021-06-05 22:34:29,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:29,041 INFO L482 AbstractCegarLoop]: Abstraction has 4665 states and 20718 transitions. [2021-06-05 22:34:29,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:29,041 INFO L276 IsEmpty]: Start isEmpty. Operand 4665 states and 20718 transitions. [2021-06-05 22:34:29,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:34:29,048 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:29,048 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:29,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable467 [2021-06-05 22:34:29,249 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:29,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:29,249 INFO L82 PathProgramCache]: Analyzing trace with hash 607709474, now seen corresponding path program 36 times [2021-06-05 22:34:29,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:29,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006379307] [2021-06-05 22:34:29,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:29,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:29,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:29,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:29,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006379307] [2021-06-05 22:34:29,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006379307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:29,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413069965] [2021-06-05 22:34:29,443 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:29,477 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:34:29,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:29,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:34:29,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:29,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:34:29,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:34:29,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 22:34:29,679 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:29,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:29,684 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:29,684 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 22:34:29,719 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:29,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413069965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:29,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:29,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 22:34:29,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902491459] [2021-06-05 22:34:29,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:34:29,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:29,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:34:29,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:34:29,720 INFO L87 Difference]: Start difference. First operand 4665 states and 20718 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:31,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:31,663 INFO L93 Difference]: Finished difference Result 5990 states and 26037 transitions. [2021-06-05 22:34:31,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 22:34:31,664 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:34:31,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:31,676 INFO L225 Difference]: With dead ends: 5990 [2021-06-05 22:34:31,676 INFO L226 Difference]: Without dead ends: 5853 [2021-06-05 22:34:31,676 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 1472.9ms TimeCoverageRelationStatistics Valid=542, Invalid=2428, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 22:34:31,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5853 states. [2021-06-05 22:34:31,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5853 to 4667. [2021-06-05 22:34:31,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4667 states, 4666 states have (on average 4.4402057436776685) internal successors, (20718), 4666 states have internal predecessors, (20718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:31,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4667 states to 4667 states and 20718 transitions. [2021-06-05 22:34:31,754 INFO L78 Accepts]: Start accepts. Automaton has 4667 states and 20718 transitions. Word has length 30 [2021-06-05 22:34:31,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:31,754 INFO L482 AbstractCegarLoop]: Abstraction has 4667 states and 20718 transitions. [2021-06-05 22:34:31,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:31,754 INFO L276 IsEmpty]: Start isEmpty. Operand 4667 states and 20718 transitions. [2021-06-05 22:34:31,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:34:31,761 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:31,761 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:31,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable468 [2021-06-05 22:34:31,962 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:31,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:31,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1424785500, now seen corresponding path program 37 times [2021-06-05 22:34:31,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:31,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454933956] [2021-06-05 22:34:31,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:31,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:32,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:32,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:32,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454933956] [2021-06-05 22:34:32,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454933956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:32,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106225655] [2021-06-05 22:34:32,141 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:32,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:32,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:34:32,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:32,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:34:32,332 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:32,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:32,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:32,335 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:34:32,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:32,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106225655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:32,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:32,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:34:32,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392427828] [2021-06-05 22:34:32,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:34:32,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:32,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:34:32,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:34:32,384 INFO L87 Difference]: Start difference. First operand 4667 states and 20718 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:33,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:33,818 INFO L93 Difference]: Finished difference Result 5752 states and 25132 transitions. [2021-06-05 22:34:33,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 22:34:33,818 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:34:33,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:33,830 INFO L225 Difference]: With dead ends: 5752 [2021-06-05 22:34:33,830 INFO L226 Difference]: Without dead ends: 5654 [2021-06-05 22:34:33,831 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1106.3ms TimeCoverageRelationStatistics Valid=345, Invalid=1635, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:34:33,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5654 states. [2021-06-05 22:34:33,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5654 to 4679. [2021-06-05 22:34:33,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4679 states, 4678 states have (on average 4.438221462163318) internal successors, (20762), 4678 states have internal predecessors, (20762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:33,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4679 states to 4679 states and 20762 transitions. [2021-06-05 22:34:33,910 INFO L78 Accepts]: Start accepts. Automaton has 4679 states and 20762 transitions. Word has length 30 [2021-06-05 22:34:33,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:33,910 INFO L482 AbstractCegarLoop]: Abstraction has 4679 states and 20762 transitions. [2021-06-05 22:34:33,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:33,910 INFO L276 IsEmpty]: Start isEmpty. Operand 4679 states and 20762 transitions. [2021-06-05 22:34:33,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:34:33,918 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:33,918 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:34,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable469,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:34,118 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:34,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:34,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1060027848, now seen corresponding path program 38 times [2021-06-05 22:34:34,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:34,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895716526] [2021-06-05 22:34:34,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:34,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:34,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:34,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:34,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895716526] [2021-06-05 22:34:34,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895716526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:34,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181068475] [2021-06-05 22:34:34,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:34,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:34:34,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:34,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:34:34,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:34,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:34:34,418 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:34,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:34,421 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:34,421 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:34:34,454 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:34,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181068475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:34,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:34,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 22:34:34,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942047804] [2021-06-05 22:34:34,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:34:34,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:34,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:34:34,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:34:34,455 INFO L87 Difference]: Start difference. First operand 4679 states and 20762 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:35,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:35,595 INFO L93 Difference]: Finished difference Result 5645 states and 24724 transitions. [2021-06-05 22:34:35,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:34:35,596 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:34:35,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:35,608 INFO L225 Difference]: With dead ends: 5645 [2021-06-05 22:34:35,608 INFO L226 Difference]: Without dead ends: 5538 [2021-06-05 22:34:35,609 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 843.7ms TimeCoverageRelationStatistics Valid=283, Invalid=1199, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:34:35,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5538 states. [2021-06-05 22:34:35,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5538 to 4667. [2021-06-05 22:34:35,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4667 states, 4666 states have (on average 4.44127732533219) internal successors, (20723), 4666 states have internal predecessors, (20723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:35,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4667 states to 4667 states and 20723 transitions. [2021-06-05 22:34:35,686 INFO L78 Accepts]: Start accepts. Automaton has 4667 states and 20723 transitions. Word has length 30 [2021-06-05 22:34:35,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:35,687 INFO L482 AbstractCegarLoop]: Abstraction has 4667 states and 20723 transitions. [2021-06-05 22:34:35,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:35,687 INFO L276 IsEmpty]: Start isEmpty. Operand 4667 states and 20723 transitions. [2021-06-05 22:34:35,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:34:35,694 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:35,694 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:35,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,219 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:35,895 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:35,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:35,895 INFO L82 PathProgramCache]: Analyzing trace with hash -373359346, now seen corresponding path program 60 times [2021-06-05 22:34:35,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:35,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330441722] [2021-06-05 22:34:35,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:35,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:36,043 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:36,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:36,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330441722] [2021-06-05 22:34:36,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330441722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:36,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445035559] [2021-06-05 22:34:36,043 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:36,081 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:34:36,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:36,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:34:36,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:36,226 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:36,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 22:34:36,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:36,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:36,237 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:36,237 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 22:34:36,317 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:36,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445035559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:36,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:36,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:34:36,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409720927] [2021-06-05 22:34:36,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:34:36,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:36,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:34:36,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:34:36,318 INFO L87 Difference]: Start difference. First operand 4667 states and 20723 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:39,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:39,401 INFO L93 Difference]: Finished difference Result 9695 states and 40591 transitions. [2021-06-05 22:34:39,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 22:34:39,402 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:34:39,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:39,421 INFO L225 Difference]: With dead ends: 9695 [2021-06-05 22:34:39,421 INFO L226 Difference]: Without dead ends: 9327 [2021-06-05 22:34:39,422 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2166 ImplicationChecksByTransitivity, 2145.8ms TimeCoverageRelationStatistics Valid=930, Invalid=5550, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 22:34:39,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9327 states. [2021-06-05 22:34:39,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9327 to 4868. [2021-06-05 22:34:39,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4868 states, 4867 states have (on average 4.464762687487158) internal successors, (21730), 4867 states have internal predecessors, (21730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:39,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4868 states to 4868 states and 21730 transitions. [2021-06-05 22:34:39,532 INFO L78 Accepts]: Start accepts. Automaton has 4868 states and 21730 transitions. Word has length 30 [2021-06-05 22:34:39,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:39,532 INFO L482 AbstractCegarLoop]: Abstraction has 4868 states and 21730 transitions. [2021-06-05 22:34:39,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:39,532 INFO L276 IsEmpty]: Start isEmpty. Operand 4868 states and 21730 transitions. [2021-06-05 22:34:39,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:34:39,540 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:39,540 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:39,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable471,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:39,740 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:39,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:39,741 INFO L82 PathProgramCache]: Analyzing trace with hash -959827704, now seen corresponding path program 9 times [2021-06-05 22:34:39,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:39,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614094799] [2021-06-05 22:34:39,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:39,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:39,902 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:39,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:39,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614094799] [2021-06-05 22:34:39,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614094799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:39,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023617043] [2021-06-05 22:34:39,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:39,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:34:39,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:39,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:34:39,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:40,083 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:40,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 22:34:40,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:40,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:40,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:40,094 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:27 [2021-06-05 22:34:40,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:40,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023617043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:40,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:40,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:34:40,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494626908] [2021-06-05 22:34:40,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:34:40,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:40,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:34:40,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:34:40,178 INFO L87 Difference]: Start difference. First operand 4868 states and 21730 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:43,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:43,460 INFO L93 Difference]: Finished difference Result 9420 states and 38753 transitions. [2021-06-05 22:34:43,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 22:34:43,461 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:34:43,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:43,479 INFO L225 Difference]: With dead ends: 9420 [2021-06-05 22:34:43,479 INFO L226 Difference]: Without dead ends: 8855 [2021-06-05 22:34:43,480 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1954 ImplicationChecksByTransitivity, 2188.9ms TimeCoverageRelationStatistics Valid=820, Invalid=5342, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 22:34:43,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8855 states. [2021-06-05 22:34:43,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8855 to 5123. [2021-06-05 22:34:43,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5123 states, 5122 states have (on average 4.437914877001171) internal successors, (22731), 5122 states have internal predecessors, (22731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:43,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5123 states to 5123 states and 22731 transitions. [2021-06-05 22:34:43,639 INFO L78 Accepts]: Start accepts. Automaton has 5123 states and 22731 transitions. Word has length 30 [2021-06-05 22:34:43,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:43,639 INFO L482 AbstractCegarLoop]: Abstraction has 5123 states and 22731 transitions. [2021-06-05 22:34:43,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:43,639 INFO L276 IsEmpty]: Start isEmpty. Operand 5123 states and 22731 transitions. [2021-06-05 22:34:43,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:34:43,647 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:43,647 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:43,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable474,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:43,848 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:43,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:43,849 INFO L82 PathProgramCache]: Analyzing trace with hash -457758120, now seen corresponding path program 61 times [2021-06-05 22:34:43,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:43,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147196080] [2021-06-05 22:34:43,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:43,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:44,016 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:44,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:44,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147196080] [2021-06-05 22:34:44,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147196080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:44,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178465997] [2021-06-05 22:34:44,017 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:44,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:44,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:34:44,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:44,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:34:44,171 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:44,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:44,174 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:44,174 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:34:44,229 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:44,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178465997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:44,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:44,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:34:44,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532986623] [2021-06-05 22:34:44,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:34:44,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:44,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:34:44,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:34:44,230 INFO L87 Difference]: Start difference. First operand 5123 states and 22731 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:47,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:47,627 INFO L93 Difference]: Finished difference Result 11828 states and 49593 transitions. [2021-06-05 22:34:47,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 22:34:47,628 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:34:47,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:47,652 INFO L225 Difference]: With dead ends: 11828 [2021-06-05 22:34:47,652 INFO L226 Difference]: Without dead ends: 11341 [2021-06-05 22:34:47,652 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2022 ImplicationChecksByTransitivity, 2382.2ms TimeCoverageRelationStatistics Valid=953, Invalid=5053, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 22:34:47,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11341 states. [2021-06-05 22:34:47,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11341 to 6262. [2021-06-05 22:34:47,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6262 states, 6261 states have (on average 4.507586647500399) internal successors, (28222), 6261 states have internal predecessors, (28222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:47,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6262 states to 6262 states and 28222 transitions. [2021-06-05 22:34:47,815 INFO L78 Accepts]: Start accepts. Automaton has 6262 states and 28222 transitions. Word has length 30 [2021-06-05 22:34:47,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:47,815 INFO L482 AbstractCegarLoop]: Abstraction has 6262 states and 28222 transitions. [2021-06-05 22:34:47,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:47,816 INFO L276 IsEmpty]: Start isEmpty. Operand 6262 states and 28222 transitions. [2021-06-05 22:34:47,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:34:47,827 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:47,827 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:48,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable476 [2021-06-05 22:34:48,027 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:48,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:48,027 INFO L82 PathProgramCache]: Analyzing trace with hash 433531888, now seen corresponding path program 62 times [2021-06-05 22:34:48,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:48,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463320984] [2021-06-05 22:34:48,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:48,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:48,198 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:48,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:48,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463320984] [2021-06-05 22:34:48,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463320984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:48,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893280160] [2021-06-05 22:34:48,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:48,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:34:48,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:48,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:34:48,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:48,361 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:48,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 22:34:48,362 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:48,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:48,373 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:48,373 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 22:34:48,475 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:48,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893280160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:48,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:48,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:34:48,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536102652] [2021-06-05 22:34:48,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:34:48,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:48,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:34:48,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:34:48,476 INFO L87 Difference]: Start difference. First operand 6262 states and 28222 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:52,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:52,210 INFO L93 Difference]: Finished difference Result 11813 states and 49936 transitions. [2021-06-05 22:34:52,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 22:34:52,210 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:34:52,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:52,235 INFO L225 Difference]: With dead ends: 11813 [2021-06-05 22:34:52,235 INFO L226 Difference]: Without dead ends: 11371 [2021-06-05 22:34:52,235 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2154 ImplicationChecksByTransitivity, 2768.2ms TimeCoverageRelationStatistics Valid=907, Invalid=5573, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 22:34:52,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11371 states. [2021-06-05 22:34:52,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11371 to 6793. [2021-06-05 22:34:52,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6793 states, 6792 states have (on average 4.523998822143699) internal successors, (30727), 6792 states have internal predecessors, (30727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:52,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6793 states to 6793 states and 30727 transitions. [2021-06-05 22:34:52,469 INFO L78 Accepts]: Start accepts. Automaton has 6793 states and 30727 transitions. Word has length 30 [2021-06-05 22:34:52,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:52,469 INFO L482 AbstractCegarLoop]: Abstraction has 6793 states and 30727 transitions. [2021-06-05 22:34:52,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:52,469 INFO L276 IsEmpty]: Start isEmpty. Operand 6793 states and 30727 transitions. [2021-06-05 22:34:52,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:34:52,482 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:52,482 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:52,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2021-06-05 22:34:52,682 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:52,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:52,682 INFO L82 PathProgramCache]: Analyzing trace with hash -888375012, now seen corresponding path program 10 times [2021-06-05 22:34:52,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:52,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444222758] [2021-06-05 22:34:52,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:52,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:52,827 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:52,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:52,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444222758] [2021-06-05 22:34:52,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444222758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:52,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228000811] [2021-06-05 22:34:52,827 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:52,861 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:34:52,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:52,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:34:52,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:52,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:34:52,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:52,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:52,979 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:52,980 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:34:53,030 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:53,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228000811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:53,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:53,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:34:53,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817339637] [2021-06-05 22:34:53,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:34:53,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:53,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:34:53,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:34:53,030 INFO L87 Difference]: Start difference. First operand 6793 states and 30727 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:54,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:54,877 INFO L93 Difference]: Finished difference Result 11844 states and 50547 transitions. [2021-06-05 22:34:54,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 22:34:54,878 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:34:54,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:54,902 INFO L225 Difference]: With dead ends: 11844 [2021-06-05 22:34:54,902 INFO L226 Difference]: Without dead ends: 11557 [2021-06-05 22:34:54,903 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1055 ImplicationChecksByTransitivity, 1190.6ms TimeCoverageRelationStatistics Valid=577, Invalid=2729, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 22:34:54,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11557 states. [2021-06-05 22:34:55,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11557 to 7034. [2021-06-05 22:34:55,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7034 states, 7033 states have (on average 4.512299161097682) internal successors, (31735), 7033 states have internal predecessors, (31735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:55,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7034 states to 7034 states and 31735 transitions. [2021-06-05 22:34:55,124 INFO L78 Accepts]: Start accepts. Automaton has 7034 states and 31735 transitions. Word has length 30 [2021-06-05 22:34:55,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:55,124 INFO L482 AbstractCegarLoop]: Abstraction has 7034 states and 31735 transitions. [2021-06-05 22:34:55,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:55,124 INFO L276 IsEmpty]: Start isEmpty. Operand 7034 states and 31735 transitions. [2021-06-05 22:34:55,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:34:55,135 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:55,135 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:55,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable480 [2021-06-05 22:34:55,336 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:55,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:55,336 INFO L82 PathProgramCache]: Analyzing trace with hash 2024676880, now seen corresponding path program 11 times [2021-06-05 22:34:55,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:55,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512294511] [2021-06-05 22:34:55,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:55,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:55,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:55,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:55,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512294511] [2021-06-05 22:34:55,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512294511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:55,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941642871] [2021-06-05 22:34:55,481 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:55,516 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:34:55,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:55,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:34:55,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:55,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:34:55,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:55,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:55,642 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:55,643 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:34:55,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:55,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941642871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:55,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:55,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:34:55,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394366241] [2021-06-05 22:34:55,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:34:55,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:55,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:34:55,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:34:55,713 INFO L87 Difference]: Start difference. First operand 7034 states and 31735 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:57,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:34:57,755 INFO L93 Difference]: Finished difference Result 14096 states and 58966 transitions. [2021-06-05 22:34:57,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 22:34:57,755 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:34:57,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:34:57,786 INFO L225 Difference]: With dead ends: 14096 [2021-06-05 22:34:57,786 INFO L226 Difference]: Without dead ends: 13488 [2021-06-05 22:34:57,787 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1491 ImplicationChecksByTransitivity, 1422.9ms TimeCoverageRelationStatistics Valid=871, Invalid=3685, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 22:34:57,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13488 states. [2021-06-05 22:34:57,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13488 to 7392. [2021-06-05 22:34:58,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7392 states, 7391 states have (on average 4.502232444865377) internal successors, (33276), 7391 states have internal predecessors, (33276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:58,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7392 states to 7392 states and 33276 transitions. [2021-06-05 22:34:58,023 INFO L78 Accepts]: Start accepts. Automaton has 7392 states and 33276 transitions. Word has length 30 [2021-06-05 22:34:58,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:34:58,023 INFO L482 AbstractCegarLoop]: Abstraction has 7392 states and 33276 transitions. [2021-06-05 22:34:58,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:34:58,023 INFO L276 IsEmpty]: Start isEmpty. Operand 7392 states and 33276 transitions. [2021-06-05 22:34:58,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:34:58,036 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:34:58,036 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:34:58,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:58,241 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:34:58,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:34:58,241 INFO L82 PathProgramCache]: Analyzing trace with hash -819317232, now seen corresponding path program 40 times [2021-06-05 22:34:58,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:34:58,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800856765] [2021-06-05 22:34:58,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:34:58,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:34:58,435 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:58,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:34:58,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800856765] [2021-06-05 22:34:58,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800856765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:58,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556398202] [2021-06-05 22:34:58,436 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:34:58,476 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:34:58,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:34:58,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:34:58,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:34:58,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 22:34:58,620 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:34:58,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:34:58,622 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:34:58,622 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 22:34:58,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:34:58,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556398202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:34:58,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:34:58,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:34:58,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654039518] [2021-06-05 22:34:58,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:34:58,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:34:58,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:34:58,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:34:58,657 INFO L87 Difference]: Start difference. First operand 7392 states and 33276 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:01,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:01,044 INFO L93 Difference]: Finished difference Result 11947 states and 51179 transitions. [2021-06-05 22:35:01,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 22:35:01,044 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:35:01,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:01,071 INFO L225 Difference]: With dead ends: 11947 [2021-06-05 22:35:01,071 INFO L226 Difference]: Without dead ends: 11713 [2021-06-05 22:35:01,071 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1185 ImplicationChecksByTransitivity, 1473.3ms TimeCoverageRelationStatistics Valid=514, Invalid=3146, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 22:35:01,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11713 states. [2021-06-05 22:35:01,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11713 to 7784. [2021-06-05 22:35:01,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7784 states, 7783 states have (on average 4.501991519979442) internal successors, (35039), 7783 states have internal predecessors, (35039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:01,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7784 states to 7784 states and 35039 transitions. [2021-06-05 22:35:01,277 INFO L78 Accepts]: Start accepts. Automaton has 7784 states and 35039 transitions. Word has length 30 [2021-06-05 22:35:01,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:01,277 INFO L482 AbstractCegarLoop]: Abstraction has 7784 states and 35039 transitions. [2021-06-05 22:35:01,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:01,277 INFO L276 IsEmpty]: Start isEmpty. Operand 7784 states and 35039 transitions. [2021-06-05 22:35:01,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:35:01,290 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:01,291 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:01,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482,226 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:01,491 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:01,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:01,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1529616390, now seen corresponding path program 39 times [2021-06-05 22:35:01,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:01,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055269806] [2021-06-05 22:35:01,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:01,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:01,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:01,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:01,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055269806] [2021-06-05 22:35:01,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055269806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:01,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328950873] [2021-06-05 22:35:01,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:01,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:35:01,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:01,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:35:01,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:01,854 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:01,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 22:35:01,856 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:01,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:01,868 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:01,869 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:27 [2021-06-05 22:35:01,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:01,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328950873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:01,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:01,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 22:35:01,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056272668] [2021-06-05 22:35:01,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:35:01,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:01,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:35:01,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:35:01,935 INFO L87 Difference]: Start difference. First operand 7784 states and 35039 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:05,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:05,276 INFO L93 Difference]: Finished difference Result 12267 states and 52308 transitions. [2021-06-05 22:35:05,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 22:35:05,276 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:35:05,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:05,303 INFO L225 Difference]: With dead ends: 12267 [2021-06-05 22:35:05,303 INFO L226 Difference]: Without dead ends: 12047 [2021-06-05 22:35:05,303 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1712 ImplicationChecksByTransitivity, 2050.1ms TimeCoverageRelationStatistics Valid=745, Invalid=4511, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 22:35:05,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12047 states. [2021-06-05 22:35:05,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12047 to 7916. [2021-06-05 22:35:05,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7916 states, 7915 states have (on average 4.492482627921667) internal successors, (35558), 7915 states have internal predecessors, (35558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:05,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7916 states to 7916 states and 35558 transitions. [2021-06-05 22:35:05,520 INFO L78 Accepts]: Start accepts. Automaton has 7916 states and 35558 transitions. Word has length 30 [2021-06-05 22:35:05,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:05,520 INFO L482 AbstractCegarLoop]: Abstraction has 7916 states and 35558 transitions. [2021-06-05 22:35:05,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:05,520 INFO L276 IsEmpty]: Start isEmpty. Operand 7916 states and 35558 transitions. [2021-06-05 22:35:05,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:35:05,535 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:05,535 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:05,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:05,735 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:05,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:05,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1607370990, now seen corresponding path program 40 times [2021-06-05 22:35:05,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:05,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372633671] [2021-06-05 22:35:05,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:05,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:05,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:05,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:05,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372633671] [2021-06-05 22:35:05,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372633671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:05,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568534680] [2021-06-05 22:35:05,869 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:05,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:35:05,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:05,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:35:05,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:06,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 22:35:06,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:06,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:06,058 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:06,058 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 22:35:06,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:06,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568534680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:06,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:06,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:35:06,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38049995] [2021-06-05 22:35:06,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:35:06,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:06,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:35:06,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:35:06,111 INFO L87 Difference]: Start difference. First operand 7916 states and 35558 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:08,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:08,427 INFO L93 Difference]: Finished difference Result 13019 states and 55469 transitions. [2021-06-05 22:35:08,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 22:35:08,428 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:35:08,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:08,458 INFO L225 Difference]: With dead ends: 13019 [2021-06-05 22:35:08,459 INFO L226 Difference]: Without dead ends: 12581 [2021-06-05 22:35:08,459 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1186 ImplicationChecksByTransitivity, 1517.1ms TimeCoverageRelationStatistics Valid=671, Invalid=2989, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 22:35:08,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12581 states. [2021-06-05 22:35:08,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12581 to 8009. [2021-06-05 22:35:08,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8009 states, 8008 states have (on average 4.493131868131868) internal successors, (35981), 8008 states have internal predecessors, (35981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:08,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8009 states to 8009 states and 35981 transitions. [2021-06-05 22:35:08,654 INFO L78 Accepts]: Start accepts. Automaton has 8009 states and 35981 transitions. Word has length 30 [2021-06-05 22:35:08,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:08,654 INFO L482 AbstractCegarLoop]: Abstraction has 8009 states and 35981 transitions. [2021-06-05 22:35:08,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:08,654 INFO L276 IsEmpty]: Start isEmpty. Operand 8009 states and 35981 transitions. [2021-06-05 22:35:08,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:35:08,668 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:08,668 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:08,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable486,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:08,873 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:08,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:08,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1794458804, now seen corresponding path program 41 times [2021-06-05 22:35:08,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:08,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096105354] [2021-06-05 22:35:08,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:08,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:09,053 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:09,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:09,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096105354] [2021-06-05 22:35:09,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096105354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:09,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268237525] [2021-06-05 22:35:09,054 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:09,103 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:35:09,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:09,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:35:09,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:09,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:35:09,229 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:09,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:09,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:09,232 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:35:09,296 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:09,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268237525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:09,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:09,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:35:09,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319595360] [2021-06-05 22:35:09,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:35:09,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:09,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:35:09,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:35:09,297 INFO L87 Difference]: Start difference. First operand 8009 states and 35981 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:11,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:11,828 INFO L93 Difference]: Finished difference Result 12325 states and 52854 transitions. [2021-06-05 22:35:11,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 22:35:11,828 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:35:11,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:11,858 INFO L225 Difference]: With dead ends: 12325 [2021-06-05 22:35:11,858 INFO L226 Difference]: Without dead ends: 12002 [2021-06-05 22:35:11,859 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1748 ImplicationChecksByTransitivity, 1883.4ms TimeCoverageRelationStatistics Valid=831, Invalid=4281, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 22:35:11,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12002 states. [2021-06-05 22:35:12,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12002 to 8130. [2021-06-05 22:35:12,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8130 states, 8129 states have (on average 4.4908352810923855) internal successors, (36506), 8129 states have internal predecessors, (36506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:12,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8130 states to 8130 states and 36506 transitions. [2021-06-05 22:35:12,050 INFO L78 Accepts]: Start accepts. Automaton has 8130 states and 36506 transitions. Word has length 30 [2021-06-05 22:35:12,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:12,050 INFO L482 AbstractCegarLoop]: Abstraction has 8130 states and 36506 transitions. [2021-06-05 22:35:12,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:12,050 INFO L276 IsEmpty]: Start isEmpty. Operand 8130 states and 36506 transitions. [2021-06-05 22:35:12,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:35:12,063 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:12,063 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:12,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable487 [2021-06-05 22:35:12,264 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:12,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:12,264 INFO L82 PathProgramCache]: Analyzing trace with hash -2107985200, now seen corresponding path program 42 times [2021-06-05 22:35:12,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:12,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350206145] [2021-06-05 22:35:12,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:12,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:12,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:12,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:12,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350206145] [2021-06-05 22:35:12,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350206145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:12,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220204891] [2021-06-05 22:35:12,434 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:12,472 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:35:12,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:12,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:35:12,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:12,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:35:12,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:35:12,601 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:12,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 22:35:12,603 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:12,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:12,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:12,619 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:47 [2021-06-05 22:35:12,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:12,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220204891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:12,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:12,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 22:35:12,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425839157] [2021-06-05 22:35:12,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:35:12,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:12,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:35:12,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:35:12,760 INFO L87 Difference]: Start difference. First operand 8130 states and 36506 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:16,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:16,692 INFO L93 Difference]: Finished difference Result 11397 states and 49382 transitions. [2021-06-05 22:35:16,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 22:35:16,693 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:35:16,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:16,717 INFO L225 Difference]: With dead ends: 11397 [2021-06-05 22:35:16,717 INFO L226 Difference]: Without dead ends: 11086 [2021-06-05 22:35:16,718 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1999 ImplicationChecksByTransitivity, 2910.4ms TimeCoverageRelationStatistics Valid=1141, Invalid=5339, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 22:35:16,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11086 states. [2021-06-05 22:35:16,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11086 to 8140. [2021-06-05 22:35:16,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8140 states, 8139 states have (on average 4.490477945693574) internal successors, (36548), 8139 states have internal predecessors, (36548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:16,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8140 states to 8140 states and 36548 transitions. [2021-06-05 22:35:16,901 INFO L78 Accepts]: Start accepts. Automaton has 8140 states and 36548 transitions. Word has length 30 [2021-06-05 22:35:16,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:16,901 INFO L482 AbstractCegarLoop]: Abstraction has 8140 states and 36548 transitions. [2021-06-05 22:35:16,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:16,902 INFO L276 IsEmpty]: Start isEmpty. Operand 8140 states and 36548 transitions. [2021-06-05 22:35:16,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:35:16,916 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:16,916 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:17,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable488 [2021-06-05 22:35:17,121 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:17,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:17,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1327482998, now seen corresponding path program 41 times [2021-06-05 22:35:17,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:17,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676399141] [2021-06-05 22:35:17,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:17,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:17,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:17,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:17,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676399141] [2021-06-05 22:35:17,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676399141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:17,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710598093] [2021-06-05 22:35:17,251 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:17,287 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:35:17,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:17,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:35:17,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:17,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:35:17,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:17,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:17,413 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:17,413 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:35:17,462 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:17,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710598093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:17,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:17,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:35:17,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905367313] [2021-06-05 22:35:17,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:35:17,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:17,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:35:17,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:35:17,463 INFO L87 Difference]: Start difference. First operand 8140 states and 36548 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:19,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:19,439 INFO L93 Difference]: Finished difference Result 11968 states and 51515 transitions. [2021-06-05 22:35:19,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 22:35:19,439 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:35:19,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:19,464 INFO L225 Difference]: With dead ends: 11968 [2021-06-05 22:35:19,465 INFO L226 Difference]: Without dead ends: 11718 [2021-06-05 22:35:19,465 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 1344.9ms TimeCoverageRelationStatistics Valid=655, Invalid=3127, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 22:35:19,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11718 states. [2021-06-05 22:35:19,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11718 to 8201. [2021-06-05 22:35:19,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8201 states, 8200 states have (on average 4.491463414634146) internal successors, (36830), 8200 states have internal predecessors, (36830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:19,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8201 states to 8201 states and 36830 transitions. [2021-06-05 22:35:19,716 INFO L78 Accepts]: Start accepts. Automaton has 8201 states and 36830 transitions. Word has length 30 [2021-06-05 22:35:19,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:19,716 INFO L482 AbstractCegarLoop]: Abstraction has 8201 states and 36830 transitions. [2021-06-05 22:35:19,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:19,716 INFO L276 IsEmpty]: Start isEmpty. Operand 8201 states and 36830 transitions. [2021-06-05 22:35:19,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:35:19,730 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:19,730 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:19,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493,231 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:19,930 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:19,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:19,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1155280850, now seen corresponding path program 42 times [2021-06-05 22:35:19,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:19,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691770583] [2021-06-05 22:35:19,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:19,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:20,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:20,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:20,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691770583] [2021-06-05 22:35:20,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691770583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:20,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009741837] [2021-06-05 22:35:20,079 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:20,114 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:35:20,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:20,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:35:20,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:20,239 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:20,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 22:35:20,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:20,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:20,250 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:20,250 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 22:35:20,310 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:20,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009741837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:20,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:20,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 22:35:20,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437884664] [2021-06-05 22:35:20,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:35:20,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:20,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:35:20,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:35:20,311 INFO L87 Difference]: Start difference. First operand 8201 states and 36830 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:22,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:22,076 INFO L93 Difference]: Finished difference Result 11516 states and 49749 transitions. [2021-06-05 22:35:22,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 22:35:22,076 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:35:22,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:22,106 INFO L225 Difference]: With dead ends: 11516 [2021-06-05 22:35:22,106 INFO L226 Difference]: Without dead ends: 11423 [2021-06-05 22:35:22,107 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 1116.1ms TimeCoverageRelationStatistics Valid=506, Invalid=2574, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 22:35:22,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11423 states. [2021-06-05 22:35:22,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11423 to 8219. [2021-06-05 22:35:22,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8219 states, 8218 states have (on average 4.488561693842784) internal successors, (36887), 8218 states have internal predecessors, (36887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:22,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8219 states to 8219 states and 36887 transitions. [2021-06-05 22:35:22,298 INFO L78 Accepts]: Start accepts. Automaton has 8219 states and 36887 transitions. Word has length 30 [2021-06-05 22:35:22,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:22,298 INFO L482 AbstractCegarLoop]: Abstraction has 8219 states and 36887 transitions. [2021-06-05 22:35:22,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:22,299 INFO L276 IsEmpty]: Start isEmpty. Operand 8219 states and 36887 transitions. [2021-06-05 22:35:22,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:35:22,315 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:22,315 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:22,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable494,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:22,516 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:22,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:22,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1352757754, now seen corresponding path program 63 times [2021-06-05 22:35:22,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:22,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482931056] [2021-06-05 22:35:22,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:22,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:22,668 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:22,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:22,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482931056] [2021-06-05 22:35:22,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482931056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:22,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372868290] [2021-06-05 22:35:22,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:22,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:35:22,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:22,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:35:22,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:22,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 22:35:22,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:22,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:22,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:22,859 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 22:35:22,892 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:22,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372868290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:22,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:22,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:35:22,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644126200] [2021-06-05 22:35:22,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:35:22,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:22,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:35:22,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:35:22,893 INFO L87 Difference]: Start difference. First operand 8219 states and 36887 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:24,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:24,706 INFO L93 Difference]: Finished difference Result 10255 states and 44935 transitions. [2021-06-05 22:35:24,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 22:35:24,707 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:35:24,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:24,730 INFO L225 Difference]: With dead ends: 10255 [2021-06-05 22:35:24,730 INFO L226 Difference]: Without dead ends: 9973 [2021-06-05 22:35:24,731 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 1163.3ms TimeCoverageRelationStatistics Valid=530, Invalid=2662, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 22:35:24,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9973 states. [2021-06-05 22:35:24,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9973 to 8261. [2021-06-05 22:35:24,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8261 states, 8260 states have (on average 4.488498789346247) internal successors, (37075), 8260 states have internal predecessors, (37075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:24,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8261 states to 8261 states and 37075 transitions. [2021-06-05 22:35:24,895 INFO L78 Accepts]: Start accepts. Automaton has 8261 states and 37075 transitions. Word has length 30 [2021-06-05 22:35:24,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:24,895 INFO L482 AbstractCegarLoop]: Abstraction has 8261 states and 37075 transitions. [2021-06-05 22:35:24,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:24,895 INFO L276 IsEmpty]: Start isEmpty. Operand 8261 states and 37075 transitions. [2021-06-05 22:35:24,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:35:24,909 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:24,909 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:25,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable496 [2021-06-05 22:35:25,110 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:25,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:25,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1637470148, now seen corresponding path program 43 times [2021-06-05 22:35:25,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:25,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513744190] [2021-06-05 22:35:25,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:25,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:25,307 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:25,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:25,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513744190] [2021-06-05 22:35:25,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513744190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:25,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968874763] [2021-06-05 22:35:25,307 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:25,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:25,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:35:25,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:25,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 22:35:25,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:25,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:25,503 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:25,503 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 22:35:25,538 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:25,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968874763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:25,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:25,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:35:25,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409573838] [2021-06-05 22:35:25,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:35:25,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:25,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:35:25,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:35:25,539 INFO L87 Difference]: Start difference. First operand 8261 states and 37075 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:28,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:28,105 INFO L93 Difference]: Finished difference Result 9684 states and 42765 transitions. [2021-06-05 22:35:28,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 22:35:28,106 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:35:28,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:28,126 INFO L225 Difference]: With dead ends: 9684 [2021-06-05 22:35:28,126 INFO L226 Difference]: Without dead ends: 9515 [2021-06-05 22:35:28,126 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 1943.6ms TimeCoverageRelationStatistics Valid=535, Invalid=2887, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 22:35:28,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9515 states. [2021-06-05 22:35:28,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9515 to 8275. [2021-06-05 22:35:28,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8275 states, 8274 states have (on average 4.486705342035291) internal successors, (37123), 8274 states have internal predecessors, (37123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:28,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8275 states to 8275 states and 37123 transitions. [2021-06-05 22:35:28,271 INFO L78 Accepts]: Start accepts. Automaton has 8275 states and 37123 transitions. Word has length 30 [2021-06-05 22:35:28,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:28,271 INFO L482 AbstractCegarLoop]: Abstraction has 8275 states and 37123 transitions. [2021-06-05 22:35:28,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:28,271 INFO L276 IsEmpty]: Start isEmpty. Operand 8275 states and 37123 transitions. [2021-06-05 22:35:28,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:35:28,285 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:28,285 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:28,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2021-06-05 22:35:28,486 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:28,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:28,486 INFO L82 PathProgramCache]: Analyzing trace with hash 771262022, now seen corresponding path program 64 times [2021-06-05 22:35:28,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:28,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636730174] [2021-06-05 22:35:28,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:28,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:28,650 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:28,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:28,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636730174] [2021-06-05 22:35:28,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636730174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:28,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374176126] [2021-06-05 22:35:28,651 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:28,689 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:35:28,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:28,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:35:28,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:28,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:35:28,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:28,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:28,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:28,811 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:35:28,865 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:28,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374176126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:28,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:28,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:35:28,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860326016] [2021-06-05 22:35:28,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:35:28,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:28,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:35:28,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:35:28,866 INFO L87 Difference]: Start difference. First operand 8275 states and 37123 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:30,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:30,610 INFO L93 Difference]: Finished difference Result 9994 states and 43966 transitions. [2021-06-05 22:35:30,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 22:35:30,610 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:35:30,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:30,631 INFO L225 Difference]: With dead ends: 9994 [2021-06-05 22:35:30,631 INFO L226 Difference]: Without dead ends: 9840 [2021-06-05 22:35:30,631 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 1307.6ms TimeCoverageRelationStatistics Valid=454, Invalid=2302, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 22:35:30,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9840 states. [2021-06-05 22:35:30,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9840 to 8305. [2021-06-05 22:35:30,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8305 states, 8304 states have (on average 4.486873795761079) internal successors, (37259), 8304 states have internal predecessors, (37259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:30,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8305 states to 8305 states and 37259 transitions. [2021-06-05 22:35:30,780 INFO L78 Accepts]: Start accepts. Automaton has 8305 states and 37259 transitions. Word has length 30 [2021-06-05 22:35:30,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:30,780 INFO L482 AbstractCegarLoop]: Abstraction has 8305 states and 37259 transitions. [2021-06-05 22:35:30,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:30,780 INFO L276 IsEmpty]: Start isEmpty. Operand 8305 states and 37259 transitions. [2021-06-05 22:35:30,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:35:30,797 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:30,797 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:31,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2021-06-05 22:35:31,021 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:31,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:31,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1970933330, now seen corresponding path program 65 times [2021-06-05 22:35:31,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:31,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798039552] [2021-06-05 22:35:31,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:31,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:31,221 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:31,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:31,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798039552] [2021-06-05 22:35:31,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798039552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:31,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41770507] [2021-06-05 22:35:31,222 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:31,257 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:35:31,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:31,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:35:31,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:31,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:35:31,376 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:31,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:31,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:31,379 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:35:31,431 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:31,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41770507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:31,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:31,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:35:31,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321665562] [2021-06-05 22:35:31,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:35:31,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:31,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:35:31,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:35:31,432 INFO L87 Difference]: Start difference. First operand 8305 states and 37259 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:33,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:33,212 INFO L93 Difference]: Finished difference Result 10235 states and 44794 transitions. [2021-06-05 22:35:33,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 22:35:33,212 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:35:33,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:33,234 INFO L225 Difference]: With dead ends: 10235 [2021-06-05 22:35:33,234 INFO L226 Difference]: Without dead ends: 9941 [2021-06-05 22:35:33,234 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 1449.6ms TimeCoverageRelationStatistics Valid=584, Invalid=2722, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 22:35:33,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9941 states. [2021-06-05 22:35:33,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9941 to 8355. [2021-06-05 22:35:33,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8355 states, 8354 states have (on average 4.486114436198228) internal successors, (37477), 8354 states have internal predecessors, (37477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:33,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8355 states to 8355 states and 37477 transitions. [2021-06-05 22:35:33,395 INFO L78 Accepts]: Start accepts. Automaton has 8355 states and 37477 transitions. Word has length 30 [2021-06-05 22:35:33,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:33,395 INFO L482 AbstractCegarLoop]: Abstraction has 8355 states and 37477 transitions. [2021-06-05 22:35:33,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:33,395 INFO L276 IsEmpty]: Start isEmpty. Operand 8355 states and 37477 transitions. [2021-06-05 22:35:33,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:35:33,409 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:33,409 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:33,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2021-06-05 22:35:33,610 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:33,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:33,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1395227832, now seen corresponding path program 44 times [2021-06-05 22:35:33,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:33,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072996435] [2021-06-05 22:35:33,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:33,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:33,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:33,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:33,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072996435] [2021-06-05 22:35:33,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072996435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:33,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982223598] [2021-06-05 22:35:33,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:33,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:35:33,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:33,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:35:33,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:33,971 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:33,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 22:35:33,973 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:33,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:33,983 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:33,983 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 22:35:34,083 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:34,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982223598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:34,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:34,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:35:34,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870375156] [2021-06-05 22:35:34,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:35:34,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:34,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:35:34,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:35:34,084 INFO L87 Difference]: Start difference. First operand 8355 states and 37477 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:36,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:36,287 INFO L93 Difference]: Finished difference Result 9648 states and 42451 transitions. [2021-06-05 22:35:36,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 22:35:36,288 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:35:36,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:36,308 INFO L225 Difference]: With dead ends: 9648 [2021-06-05 22:35:36,308 INFO L226 Difference]: Without dead ends: 9397 [2021-06-05 22:35:36,308 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1050 ImplicationChecksByTransitivity, 1767.4ms TimeCoverageRelationStatistics Valid=482, Invalid=2940, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 22:35:36,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9397 states. [2021-06-05 22:35:36,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9397 to 8369. [2021-06-05 22:35:36,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8369 states, 8368 states have (on average 4.484464627151052) internal successors, (37526), 8368 states have internal predecessors, (37526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:36,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8369 states to 8369 states and 37526 transitions. [2021-06-05 22:35:36,457 INFO L78 Accepts]: Start accepts. Automaton has 8369 states and 37526 transitions. Word has length 30 [2021-06-05 22:35:36,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:36,457 INFO L482 AbstractCegarLoop]: Abstraction has 8369 states and 37526 transitions. [2021-06-05 22:35:36,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:36,457 INFO L276 IsEmpty]: Start isEmpty. Operand 8369 states and 37526 transitions. [2021-06-05 22:35:36,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:35:36,472 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:36,472 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:36,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable500 [2021-06-05 22:35:36,672 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:36,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:36,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1504152388, now seen corresponding path program 45 times [2021-06-05 22:35:36,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:36,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841868006] [2021-06-05 22:35:36,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:36,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:36,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:36,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:36,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841868006] [2021-06-05 22:35:36,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841868006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:36,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285604933] [2021-06-05 22:35:36,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:36,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:35:36,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:36,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:35:36,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:37,065 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:37,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 22:35:37,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:37,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:37,087 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:37,087 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 22:35:37,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:37,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285604933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:37,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:37,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:35:37,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75617652] [2021-06-05 22:35:37,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:35:37,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:37,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:35:37,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:35:37,188 INFO L87 Difference]: Start difference. First operand 8369 states and 37526 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:39,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:39,226 INFO L93 Difference]: Finished difference Result 9780 states and 43000 transitions. [2021-06-05 22:35:39,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 22:35:39,226 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:35:39,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:39,248 INFO L225 Difference]: With dead ends: 9780 [2021-06-05 22:35:39,248 INFO L226 Difference]: Without dead ends: 9489 [2021-06-05 22:35:39,248 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 1728.1ms TimeCoverageRelationStatistics Valid=545, Invalid=2877, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 22:35:39,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9489 states. [2021-06-05 22:35:39,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9489 to 8357. [2021-06-05 22:35:39,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8357 states, 8356 states have (on average 4.485998085208234) internal successors, (37485), 8356 states have internal predecessors, (37485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:39,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8357 states to 8357 states and 37485 transitions. [2021-06-05 22:35:39,414 INFO L78 Accepts]: Start accepts. Automaton has 8357 states and 37485 transitions. Word has length 30 [2021-06-05 22:35:39,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:39,414 INFO L482 AbstractCegarLoop]: Abstraction has 8357 states and 37485 transitions. [2021-06-05 22:35:39,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:39,414 INFO L276 IsEmpty]: Start isEmpty. Operand 8357 states and 37485 transitions. [2021-06-05 22:35:39,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:35:39,430 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:39,430 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:39,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable503,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:39,637 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:39,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:39,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1111003758, now seen corresponding path program 66 times [2021-06-05 22:35:39,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:39,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901195585] [2021-06-05 22:35:39,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:39,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:39,821 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:39,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:39,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901195585] [2021-06-05 22:35:39,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901195585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:39,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023591338] [2021-06-05 22:35:39,822 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:39,857 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:35:39,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:39,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 22:35:39,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:40,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:35:40,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:35:40,151 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:40,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 48 [2021-06-05 22:35:40,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:40,203 INFO L628 ElimStorePlain]: treesize reduction 33, result has 50.0 percent of original size [2021-06-05 22:35:40,205 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:40,205 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:27 [2021-06-05 22:35:40,292 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:40,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023591338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:40,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:40,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:35:40,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137293347] [2021-06-05 22:35:40,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:35:40,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:40,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:35:40,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:35:40,293 INFO L87 Difference]: Start difference. First operand 8357 states and 37485 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:43,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:43,175 INFO L93 Difference]: Finished difference Result 10902 states and 47264 transitions. [2021-06-05 22:35:43,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 22:35:43,176 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:35:43,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:43,199 INFO L225 Difference]: With dead ends: 10902 [2021-06-05 22:35:43,199 INFO L226 Difference]: Without dead ends: 10543 [2021-06-05 22:35:43,200 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 2222.7ms TimeCoverageRelationStatistics Valid=655, Invalid=4037, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 22:35:43,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10543 states. [2021-06-05 22:35:43,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10543 to 8395. [2021-06-05 22:35:43,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8395 states, 8394 states have (on average 4.484751012628068) internal successors, (37645), 8394 states have internal predecessors, (37645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:43,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8395 states to 8395 states and 37645 transitions. [2021-06-05 22:35:43,361 INFO L78 Accepts]: Start accepts. Automaton has 8395 states and 37645 transitions. Word has length 30 [2021-06-05 22:35:43,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:43,361 INFO L482 AbstractCegarLoop]: Abstraction has 8395 states and 37645 transitions. [2021-06-05 22:35:43,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:43,362 INFO L276 IsEmpty]: Start isEmpty. Operand 8395 states and 37645 transitions. [2021-06-05 22:35:43,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:35:43,377 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:43,377 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:43,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable506,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:43,578 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:43,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:43,579 INFO L82 PathProgramCache]: Analyzing trace with hash 193735636, now seen corresponding path program 46 times [2021-06-05 22:35:43,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:43,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438411156] [2021-06-05 22:35:43,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:43,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:43,780 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:43,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:43,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438411156] [2021-06-05 22:35:43,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438411156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:43,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40002223] [2021-06-05 22:35:43,781 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:43,815 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:35:43,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:43,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:35:43,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:43,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 22:35:43,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:43,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:43,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:43,978 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 22:35:44,024 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:44,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40002223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:44,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:44,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:35:44,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305298609] [2021-06-05 22:35:44,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:35:44,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:44,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:35:44,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:35:44,025 INFO L87 Difference]: Start difference. First operand 8395 states and 37645 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:44,379 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2021-06-05 22:35:46,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:46,758 INFO L93 Difference]: Finished difference Result 10029 states and 44121 transitions. [2021-06-05 22:35:46,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 22:35:46,758 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:35:46,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:46,780 INFO L225 Difference]: With dead ends: 10029 [2021-06-05 22:35:46,780 INFO L226 Difference]: Without dead ends: 9864 [2021-06-05 22:35:46,780 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1003 ImplicationChecksByTransitivity, 1910.9ms TimeCoverageRelationStatistics Valid=506, Invalid=3034, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 22:35:46,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9864 states. [2021-06-05 22:35:46,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9864 to 8451. [2021-06-05 22:35:46,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8451 states, 8450 states have (on average 4.47585798816568) internal successors, (37821), 8450 states have internal predecessors, (37821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:46,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8451 states to 8451 states and 37821 transitions. [2021-06-05 22:35:46,938 INFO L78 Accepts]: Start accepts. Automaton has 8451 states and 37821 transitions. Word has length 30 [2021-06-05 22:35:46,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:46,938 INFO L482 AbstractCegarLoop]: Abstraction has 8451 states and 37821 transitions. [2021-06-05 22:35:46,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:46,938 INFO L276 IsEmpty]: Start isEmpty. Operand 8451 states and 37821 transitions. [2021-06-05 22:35:46,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:35:46,953 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:46,953 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:47,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable511 [2021-06-05 22:35:47,161 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:47,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:47,161 INFO L82 PathProgramCache]: Analyzing trace with hash -264609798, now seen corresponding path program 47 times [2021-06-05 22:35:47,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:47,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841792949] [2021-06-05 22:35:47,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:47,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:47,389 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:47,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:47,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841792949] [2021-06-05 22:35:47,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841792949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:47,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649722568] [2021-06-05 22:35:47,389 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:47,427 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:35:47,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:47,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:35:47,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:47,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 22:35:47,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:47,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:47,572 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:47,572 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 22:35:47,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:47,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649722568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:47,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:47,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:35:47,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871339412] [2021-06-05 22:35:47,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:35:47,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:47,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:35:47,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:35:47,627 INFO L87 Difference]: Start difference. First operand 8451 states and 37821 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:49,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:49,865 INFO L93 Difference]: Finished difference Result 9890 states and 43610 transitions. [2021-06-05 22:35:49,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 22:35:49,865 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:35:49,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:49,887 INFO L225 Difference]: With dead ends: 9890 [2021-06-05 22:35:49,887 INFO L226 Difference]: Without dead ends: 9757 [2021-06-05 22:35:49,887 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 1738.2ms TimeCoverageRelationStatistics Valid=475, Invalid=2387, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 22:35:49,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9757 states. [2021-06-05 22:35:50,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9757 to 8461. [2021-06-05 22:35:50,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8461 states, 8460 states have (on average 4.474113475177305) internal successors, (37851), 8460 states have internal predecessors, (37851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:50,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8461 states to 8461 states and 37851 transitions. [2021-06-05 22:35:50,047 INFO L78 Accepts]: Start accepts. Automaton has 8461 states and 37851 transitions. Word has length 30 [2021-06-05 22:35:50,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:50,048 INFO L482 AbstractCegarLoop]: Abstraction has 8461 states and 37851 transitions. [2021-06-05 22:35:50,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:50,048 INFO L276 IsEmpty]: Start isEmpty. Operand 8461 states and 37851 transitions. [2021-06-05 22:35:50,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:35:50,062 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:50,062 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:50,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable512,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:50,262 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:50,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:50,263 INFO L82 PathProgramCache]: Analyzing trace with hash -770956064, now seen corresponding path program 48 times [2021-06-05 22:35:50,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:50,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005468607] [2021-06-05 22:35:50,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:50,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:50,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:50,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:50,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005468607] [2021-06-05 22:35:50,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005468607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:50,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062145376] [2021-06-05 22:35:50,441 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:50,477 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:35:50,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:50,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:35:50,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:50,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:35:50,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:35:50,680 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:50,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 40 [2021-06-05 22:35:50,686 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:35:50,711 INFO L628 ElimStorePlain]: treesize reduction 33, result has 45.9 percent of original size [2021-06-05 22:35:50,713 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:50,713 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:22 [2021-06-05 22:35:50,813 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:50,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062145376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:50,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:50,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:35:50,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995458043] [2021-06-05 22:35:50,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:35:50,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:50,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:35:50,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:35:50,814 INFO L87 Difference]: Start difference. First operand 8461 states and 37851 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:53,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:53,209 INFO L93 Difference]: Finished difference Result 9871 states and 43272 transitions. [2021-06-05 22:35:53,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 22:35:53,210 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:35:53,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:53,231 INFO L225 Difference]: With dead ends: 9871 [2021-06-05 22:35:53,231 INFO L226 Difference]: Without dead ends: 9647 [2021-06-05 22:35:53,232 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 708 ImplicationChecksByTransitivity, 1644.3ms TimeCoverageRelationStatistics Valid=426, Invalid=2654, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 22:35:53,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9647 states. [2021-06-05 22:35:53,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9647 to 8447. [2021-06-05 22:35:53,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8447 states, 8446 states have (on average 4.4770305470044995) internal successors, (37813), 8446 states have internal predecessors, (37813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:53,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8447 states to 8447 states and 37813 transitions. [2021-06-05 22:35:53,383 INFO L78 Accepts]: Start accepts. Automaton has 8447 states and 37813 transitions. Word has length 30 [2021-06-05 22:35:53,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:53,383 INFO L482 AbstractCegarLoop]: Abstraction has 8447 states and 37813 transitions. [2021-06-05 22:35:53,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:53,383 INFO L276 IsEmpty]: Start isEmpty. Operand 8447 states and 37813 transitions. [2021-06-05 22:35:53,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:35:53,397 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:53,397 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:53,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable513,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:53,598 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:53,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:53,598 INFO L82 PathProgramCache]: Analyzing trace with hash 173899368, now seen corresponding path program 49 times [2021-06-05 22:35:53,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:53,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326599905] [2021-06-05 22:35:53,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:53,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:53,775 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:53,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:53,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326599905] [2021-06-05 22:35:53,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326599905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:53,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952288161] [2021-06-05 22:35:53,775 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:53,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:53,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:35:53,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:53,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:35:53,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:53,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:53,925 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:53,925 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 22:35:53,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:53,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952288161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:53,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:53,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:35:53,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117225956] [2021-06-05 22:35:53,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:35:53,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:53,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:35:53,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:35:53,991 INFO L87 Difference]: Start difference. First operand 8447 states and 37813 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:55,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:55,996 INFO L93 Difference]: Finished difference Result 9694 states and 42844 transitions. [2021-06-05 22:35:55,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 22:35:55,996 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:35:55,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:56,018 INFO L225 Difference]: With dead ends: 9694 [2021-06-05 22:35:56,018 INFO L226 Difference]: Without dead ends: 9580 [2021-06-05 22:35:56,018 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 871 ImplicationChecksByTransitivity, 1632.9ms TimeCoverageRelationStatistics Valid=464, Invalid=2506, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 22:35:56,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9580 states. [2021-06-05 22:35:56,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9580 to 8461. [2021-06-05 22:35:56,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8461 states, 8460 states have (on average 4.4763593380614655) internal successors, (37870), 8460 states have internal predecessors, (37870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:56,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8461 states to 8461 states and 37870 transitions. [2021-06-05 22:35:56,180 INFO L78 Accepts]: Start accepts. Automaton has 8461 states and 37870 transitions. Word has length 30 [2021-06-05 22:35:56,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:56,180 INFO L482 AbstractCegarLoop]: Abstraction has 8461 states and 37870 transitions. [2021-06-05 22:35:56,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:56,180 INFO L276 IsEmpty]: Start isEmpty. Operand 8461 states and 37870 transitions. [2021-06-05 22:35:56,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:35:56,195 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:56,195 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:56,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable517 [2021-06-05 22:35:56,418 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:56,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:56,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1221687708, now seen corresponding path program 50 times [2021-06-05 22:35:56,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:56,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107690239] [2021-06-05 22:35:56,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:56,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:56,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:56,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:56,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107690239] [2021-06-05 22:35:56,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107690239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:56,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348361828] [2021-06-05 22:35:56,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:56,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:35:56,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:56,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:35:56,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:56,752 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:56,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 22:35:56,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:56,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:56,764 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:56,764 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 22:35:56,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:56,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348361828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:56,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:35:56,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:35:56,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160777662] [2021-06-05 22:35:56,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:35:56,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:35:56,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:35:56,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:35:56,894 INFO L87 Difference]: Start difference. First operand 8461 states and 37870 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:59,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:35:59,217 INFO L93 Difference]: Finished difference Result 9865 states and 43320 transitions. [2021-06-05 22:35:59,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 22:35:59,218 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:35:59,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:35:59,240 INFO L225 Difference]: With dead ends: 9865 [2021-06-05 22:35:59,241 INFO L226 Difference]: Without dead ends: 9569 [2021-06-05 22:35:59,241 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1038 ImplicationChecksByTransitivity, 1864.1ms TimeCoverageRelationStatistics Valid=555, Invalid=2985, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 22:35:59,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9569 states. [2021-06-05 22:35:59,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9569 to 8464. [2021-06-05 22:35:59,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8464 states, 8463 states have (on average 4.475599669148056) internal successors, (37877), 8463 states have internal predecessors, (37877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:59,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8464 states to 8464 states and 37877 transitions. [2021-06-05 22:35:59,401 INFO L78 Accepts]: Start accepts. Automaton has 8464 states and 37877 transitions. Word has length 30 [2021-06-05 22:35:59,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:35:59,401 INFO L482 AbstractCegarLoop]: Abstraction has 8464 states and 37877 transitions. [2021-06-05 22:35:59,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:35:59,401 INFO L276 IsEmpty]: Start isEmpty. Operand 8464 states and 37877 transitions. [2021-06-05 22:35:59,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:35:59,415 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:35:59,415 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:35:59,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable518,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:59,618 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:35:59,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:35:59,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1585391294, now seen corresponding path program 51 times [2021-06-05 22:35:59,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:35:59,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106979491] [2021-06-05 22:35:59,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:35:59,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:35:59,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:35:59,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:35:59,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106979491] [2021-06-05 22:35:59,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106979491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:35:59,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683818744] [2021-06-05 22:35:59,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:35:59,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:35:59,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:35:59,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:35:59,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:35:59,938 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:59,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 22:35:59,939 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:35:59,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:35:59,950 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:35:59,951 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 22:36:00,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:00,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683818744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:00,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:00,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:36:00,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347828665] [2021-06-05 22:36:00,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:36:00,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:00,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:36:00,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:36:00,081 INFO L87 Difference]: Start difference. First operand 8464 states and 37877 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:02,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:02,399 INFO L93 Difference]: Finished difference Result 9781 states and 42947 transitions. [2021-06-05 22:36:02,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 22:36:02,399 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:36:02,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:02,420 INFO L225 Difference]: With dead ends: 9781 [2021-06-05 22:36:02,420 INFO L226 Difference]: Without dead ends: 9533 [2021-06-05 22:36:02,420 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1077 ImplicationChecksByTransitivity, 1797.5ms TimeCoverageRelationStatistics Valid=512, Invalid=3148, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 22:36:02,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9533 states. [2021-06-05 22:36:02,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9533 to 8475. [2021-06-05 22:36:02,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8475 states, 8474 states have (on average 4.474274250649044) internal successors, (37915), 8474 states have internal predecessors, (37915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:02,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8475 states to 8475 states and 37915 transitions. [2021-06-05 22:36:02,585 INFO L78 Accepts]: Start accepts. Automaton has 8475 states and 37915 transitions. Word has length 30 [2021-06-05 22:36:02,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:02,585 INFO L482 AbstractCegarLoop]: Abstraction has 8475 states and 37915 transitions. [2021-06-05 22:36:02,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:02,585 INFO L276 IsEmpty]: Start isEmpty. Operand 8475 states and 37915 transitions. [2021-06-05 22:36:02,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:36:02,599 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:02,599 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:02,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable521 [2021-06-05 22:36:02,800 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:02,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:02,800 INFO L82 PathProgramCache]: Analyzing trace with hash -2118148276, now seen corresponding path program 52 times [2021-06-05 22:36:02,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:02,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623798962] [2021-06-05 22:36:02,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:02,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:02,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:02,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:02,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623798962] [2021-06-05 22:36:02,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623798962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:02,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805398608] [2021-06-05 22:36:02,938 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:02,973 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:36:02,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:02,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:36:02,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:03,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:36:03,094 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:03,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:03,100 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:03,101 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 22:36:03,168 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:03,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805398608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:03,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:03,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:36:03,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322444710] [2021-06-05 22:36:03,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:36:03,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:03,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:36:03,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:36:03,169 INFO L87 Difference]: Start difference. First operand 8475 states and 37915 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:05,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:05,009 INFO L93 Difference]: Finished difference Result 9720 states and 42895 transitions. [2021-06-05 22:36:05,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 22:36:05,009 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:36:05,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:05,030 INFO L225 Difference]: With dead ends: 9720 [2021-06-05 22:36:05,030 INFO L226 Difference]: Without dead ends: 9609 [2021-06-05 22:36:05,031 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1044 ImplicationChecksByTransitivity, 1426.7ms TimeCoverageRelationStatistics Valid=505, Invalid=2687, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 22:36:05,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9609 states. [2021-06-05 22:36:05,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9609 to 8497. [2021-06-05 22:36:05,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8497 states, 8496 states have (on average 4.472222222222222) internal successors, (37996), 8496 states have internal predecessors, (37996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:05,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8497 states to 8497 states and 37996 transitions. [2021-06-05 22:36:05,243 INFO L78 Accepts]: Start accepts. Automaton has 8497 states and 37996 transitions. Word has length 30 [2021-06-05 22:36:05,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:05,243 INFO L482 AbstractCegarLoop]: Abstraction has 8497 states and 37996 transitions. [2021-06-05 22:36:05,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:05,243 INFO L276 IsEmpty]: Start isEmpty. Operand 8497 states and 37996 transitions. [2021-06-05 22:36:05,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:36:05,256 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:05,257 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:05,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable524,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:05,457 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:05,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:05,457 INFO L82 PathProgramCache]: Analyzing trace with hash 331084236, now seen corresponding path program 53 times [2021-06-05 22:36:05,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:05,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716254947] [2021-06-05 22:36:05,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:05,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:05,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:05,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:05,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716254947] [2021-06-05 22:36:05,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716254947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:05,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938481825] [2021-06-05 22:36:05,626 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:05,662 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:36:05,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:05,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 22:36:05,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:05,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:36:05,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:36:05,827 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:05,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 22:36:05,829 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:05,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:05,860 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:05,861 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:236 [2021-06-05 22:36:06,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:06,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938481825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:06,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:06,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 22:36:06,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505699986] [2021-06-05 22:36:06,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:36:06,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:06,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:36:06,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:36:06,024 INFO L87 Difference]: Start difference. First operand 8497 states and 37996 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:07,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:07,776 INFO L93 Difference]: Finished difference Result 9754 states and 42857 transitions. [2021-06-05 22:36:07,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:36:07,776 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:36:07,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:07,797 INFO L225 Difference]: With dead ends: 9754 [2021-06-05 22:36:07,797 INFO L226 Difference]: Without dead ends: 9513 [2021-06-05 22:36:07,797 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 1416.9ms TimeCoverageRelationStatistics Valid=349, Invalid=1721, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 22:36:07,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9513 states. [2021-06-05 22:36:07,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9513 to 8497. [2021-06-05 22:36:07,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8497 states, 8496 states have (on average 4.472222222222222) internal successors, (37996), 8496 states have internal predecessors, (37996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:07,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8497 states to 8497 states and 37996 transitions. [2021-06-05 22:36:07,961 INFO L78 Accepts]: Start accepts. Automaton has 8497 states and 37996 transitions. Word has length 30 [2021-06-05 22:36:07,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:07,961 INFO L482 AbstractCegarLoop]: Abstraction has 8497 states and 37996 transitions. [2021-06-05 22:36:07,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:07,961 INFO L276 IsEmpty]: Start isEmpty. Operand 8497 states and 37996 transitions. [2021-06-05 22:36:07,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:36:07,975 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:07,975 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:08,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable525 [2021-06-05 22:36:08,175 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:08,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:08,176 INFO L82 PathProgramCache]: Analyzing trace with hash 2075448242, now seen corresponding path program 54 times [2021-06-05 22:36:08,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:08,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137505459] [2021-06-05 22:36:08,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:08,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:08,342 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:08,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:08,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137505459] [2021-06-05 22:36:08,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137505459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:08,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102213230] [2021-06-05 22:36:08,342 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:08,394 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:36:08,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:08,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:36:08,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:08,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:36:08,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:36:08,520 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:08,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 22:36:08,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:08,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:08,540 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:08,540 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:50 [2021-06-05 22:36:08,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:08,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102213230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:08,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:08,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 22:36:08,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56687365] [2021-06-05 22:36:08,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:36:08,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:08,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:36:08,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:36:08,731 INFO L87 Difference]: Start difference. First operand 8497 states and 37996 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:11,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:11,197 INFO L93 Difference]: Finished difference Result 9984 states and 43777 transitions. [2021-06-05 22:36:11,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 22:36:11,197 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:36:11,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:11,220 INFO L225 Difference]: With dead ends: 9984 [2021-06-05 22:36:11,220 INFO L226 Difference]: Without dead ends: 9774 [2021-06-05 22:36:11,220 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 1820.2ms TimeCoverageRelationStatistics Valid=597, Invalid=2595, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 22:36:11,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9774 states. [2021-06-05 22:36:11,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9774 to 8494. [2021-06-05 22:36:11,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8494 states, 8493 states have (on average 4.473095490403862) internal successors, (37990), 8493 states have internal predecessors, (37990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:11,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8494 states to 8494 states and 37990 transitions. [2021-06-05 22:36:11,397 INFO L78 Accepts]: Start accepts. Automaton has 8494 states and 37990 transitions. Word has length 30 [2021-06-05 22:36:11,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:11,397 INFO L482 AbstractCegarLoop]: Abstraction has 8494 states and 37990 transitions. [2021-06-05 22:36:11,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:11,397 INFO L276 IsEmpty]: Start isEmpty. Operand 8494 states and 37990 transitions. [2021-06-05 22:36:11,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:36:11,412 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:11,412 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:11,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable534,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:11,612 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:11,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:11,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1269358978, now seen corresponding path program 12 times [2021-06-05 22:36:11,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:11,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884373099] [2021-06-05 22:36:11,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:11,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:11,761 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:11,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:11,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884373099] [2021-06-05 22:36:11,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884373099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:11,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562421271] [2021-06-05 22:36:11,761 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:11,796 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:36:11,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:11,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:36:11,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:11,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:36:11,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:11,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:11,924 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:11,924 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:36:11,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:11,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562421271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:11,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:11,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:36:11,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466991323] [2021-06-05 22:36:11,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:36:11,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:11,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:36:11,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:36:11,974 INFO L87 Difference]: Start difference. First operand 8494 states and 37990 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:13,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:13,911 INFO L93 Difference]: Finished difference Result 9846 states and 43390 transitions. [2021-06-05 22:36:13,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 22:36:13,911 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:36:13,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:13,933 INFO L225 Difference]: With dead ends: 9846 [2021-06-05 22:36:13,933 INFO L226 Difference]: Without dead ends: 9728 [2021-06-05 22:36:13,934 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 1375.9ms TimeCoverageRelationStatistics Valid=488, Invalid=2482, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 22:36:13,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9728 states. [2021-06-05 22:36:14,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9728 to 8526. [2021-06-05 22:36:14,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8526 states, 8525 states have (on average 4.472023460410557) internal successors, (38124), 8525 states have internal predecessors, (38124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:14,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8526 states to 8526 states and 38124 transitions. [2021-06-05 22:36:14,101 INFO L78 Accepts]: Start accepts. Automaton has 8526 states and 38124 transitions. Word has length 30 [2021-06-05 22:36:14,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:14,101 INFO L482 AbstractCegarLoop]: Abstraction has 8526 states and 38124 transitions. [2021-06-05 22:36:14,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:14,101 INFO L276 IsEmpty]: Start isEmpty. Operand 8526 states and 38124 transitions. [2021-06-05 22:36:14,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:36:14,116 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:14,116 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:14,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable539 [2021-06-05 22:36:14,316 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:14,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:14,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1989792446, now seen corresponding path program 13 times [2021-06-05 22:36:14,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:14,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241920845] [2021-06-05 22:36:14,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:14,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:14,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:14,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:14,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241920845] [2021-06-05 22:36:14,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241920845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:14,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492466165] [2021-06-05 22:36:14,472 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:14,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:14,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:36:14,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:14,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:36:14,633 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:14,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:14,636 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:14,636 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:36:14,688 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:14,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492466165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:14,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:14,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:36:14,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73045238] [2021-06-05 22:36:14,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:36:14,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:14,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:36:14,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:36:14,689 INFO L87 Difference]: Start difference. First operand 8526 states and 38124 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:16,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:16,689 INFO L93 Difference]: Finished difference Result 10067 states and 44278 transitions. [2021-06-05 22:36:16,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 22:36:16,689 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:36:16,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:16,713 INFO L225 Difference]: With dead ends: 10067 [2021-06-05 22:36:16,713 INFO L226 Difference]: Without dead ends: 9923 [2021-06-05 22:36:16,713 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1289 ImplicationChecksByTransitivity, 1599.1ms TimeCoverageRelationStatistics Valid=721, Invalid=3439, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 22:36:16,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9923 states. [2021-06-05 22:36:16,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9923 to 8514. [2021-06-05 22:36:16,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8514 states, 8513 states have (on average 4.47198402443322) internal successors, (38070), 8513 states have internal predecessors, (38070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:16,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8514 states to 8514 states and 38070 transitions. [2021-06-05 22:36:16,880 INFO L78 Accepts]: Start accepts. Automaton has 8514 states and 38070 transitions. Word has length 30 [2021-06-05 22:36:16,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:16,881 INFO L482 AbstractCegarLoop]: Abstraction has 8514 states and 38070 transitions. [2021-06-05 22:36:16,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:16,881 INFO L276 IsEmpty]: Start isEmpty. Operand 8514 states and 38070 transitions. [2021-06-05 22:36:16,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:36:16,894 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:16,894 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:17,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable540 [2021-06-05 22:36:17,094 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:17,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:17,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1107069828, now seen corresponding path program 14 times [2021-06-05 22:36:17,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:17,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280163642] [2021-06-05 22:36:17,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:17,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:17,284 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:17,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:17,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280163642] [2021-06-05 22:36:17,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280163642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:17,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529306304] [2021-06-05 22:36:17,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:17,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:36:17,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:17,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:36:17,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:17,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:36:17,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:36:17,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 22:36:17,599 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:17,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:17,604 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:17,604 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 22:36:17,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:17,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529306304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:17,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:17,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 22:36:17,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826871359] [2021-06-05 22:36:17,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:36:17,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:17,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:36:17,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:36:17,641 INFO L87 Difference]: Start difference. First operand 8514 states and 38070 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:19,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:19,887 INFO L93 Difference]: Finished difference Result 9972 states and 43829 transitions. [2021-06-05 22:36:19,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 22:36:19,887 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:36:19,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:19,907 INFO L225 Difference]: With dead ends: 9972 [2021-06-05 22:36:19,907 INFO L226 Difference]: Without dead ends: 9778 [2021-06-05 22:36:19,908 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1018 ImplicationChecksByTransitivity, 1720.8ms TimeCoverageRelationStatistics Valid=589, Invalid=3071, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 22:36:19,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9778 states. [2021-06-05 22:36:20,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9778 to 8514. [2021-06-05 22:36:20,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8514 states, 8513 states have (on average 4.47198402443322) internal successors, (38070), 8513 states have internal predecessors, (38070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:20,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8514 states to 8514 states and 38070 transitions. [2021-06-05 22:36:20,067 INFO L78 Accepts]: Start accepts. Automaton has 8514 states and 38070 transitions. Word has length 30 [2021-06-05 22:36:20,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:20,067 INFO L482 AbstractCegarLoop]: Abstraction has 8514 states and 38070 transitions. [2021-06-05 22:36:20,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:20,067 INFO L276 IsEmpty]: Start isEmpty. Operand 8514 states and 38070 transitions. [2021-06-05 22:36:20,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:36:20,081 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:20,082 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:20,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable541 [2021-06-05 22:36:20,282 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:20,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:20,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1883158074, now seen corresponding path program 43 times [2021-06-05 22:36:20,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:20,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022032350] [2021-06-05 22:36:20,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:20,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:20,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:20,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:20,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022032350] [2021-06-05 22:36:20,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022032350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:20,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24539079] [2021-06-05 22:36:20,444 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:20,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:20,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:36:20,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:20,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 22:36:20,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:20,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:20,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:20,639 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 22:36:20,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:20,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24539079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:20,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:20,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:36:20,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537617627] [2021-06-05 22:36:20,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:36:20,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:20,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:36:20,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:36:20,675 INFO L87 Difference]: Start difference. First operand 8514 states and 38070 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:23,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:23,334 INFO L93 Difference]: Finished difference Result 9829 states and 43367 transitions. [2021-06-05 22:36:23,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 22:36:23,334 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:36:23,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:23,353 INFO L225 Difference]: With dead ends: 9829 [2021-06-05 22:36:23,353 INFO L226 Difference]: Without dead ends: 9684 [2021-06-05 22:36:23,354 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1117 ImplicationChecksByTransitivity, 1918.1ms TimeCoverageRelationStatistics Valid=617, Invalid=3165, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 22:36:23,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9684 states. [2021-06-05 22:36:23,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9684 to 8514. [2021-06-05 22:36:23,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8514 states, 8513 states have (on average 4.471044285210854) internal successors, (38062), 8513 states have internal predecessors, (38062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:23,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8514 states to 8514 states and 38062 transitions. [2021-06-05 22:36:23,518 INFO L78 Accepts]: Start accepts. Automaton has 8514 states and 38062 transitions. Word has length 30 [2021-06-05 22:36:23,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:23,518 INFO L482 AbstractCegarLoop]: Abstraction has 8514 states and 38062 transitions. [2021-06-05 22:36:23,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:23,518 INFO L276 IsEmpty]: Start isEmpty. Operand 8514 states and 38062 transitions. [2021-06-05 22:36:23,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:36:23,533 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:23,533 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:23,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable542 [2021-06-05 22:36:23,734 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:23,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:23,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1066082048, now seen corresponding path program 44 times [2021-06-05 22:36:23,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:23,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979639400] [2021-06-05 22:36:23,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:23,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:23,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:23,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:23,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979639400] [2021-06-05 22:36:23,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979639400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:23,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079196174] [2021-06-05 22:36:23,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:23,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:36:23,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:23,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:36:23,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:24,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:36:24,032 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:24,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:24,035 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:24,035 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:36:24,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:24,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079196174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:24,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:24,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:36:24,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369568347] [2021-06-05 22:36:24,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:36:24,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:24,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:36:24,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:36:24,087 INFO L87 Difference]: Start difference. First operand 8514 states and 38062 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:26,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:26,461 INFO L93 Difference]: Finished difference Result 9560 states and 42268 transitions. [2021-06-05 22:36:26,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 22:36:26,461 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:36:26,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:26,483 INFO L225 Difference]: With dead ends: 9560 [2021-06-05 22:36:26,483 INFO L226 Difference]: Without dead ends: 9462 [2021-06-05 22:36:26,484 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 1801.4ms TimeCoverageRelationStatistics Valid=497, Invalid=2583, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 22:36:26,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9462 states. [2021-06-05 22:36:26,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9462 to 8520. [2021-06-05 22:36:26,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8520 states, 8519 states have (on average 4.470947294283366) internal successors, (38088), 8519 states have internal predecessors, (38088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:26,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8520 states to 8520 states and 38088 transitions. [2021-06-05 22:36:26,646 INFO L78 Accepts]: Start accepts. Automaton has 8520 states and 38088 transitions. Word has length 30 [2021-06-05 22:36:26,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:26,646 INFO L482 AbstractCegarLoop]: Abstraction has 8520 states and 38088 transitions. [2021-06-05 22:36:26,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:26,646 INFO L276 IsEmpty]: Start isEmpty. Operand 8520 states and 38088 transitions. [2021-06-05 22:36:26,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:36:26,661 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:26,662 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:26,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable543 [2021-06-05 22:36:26,862 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:26,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:26,862 INFO L82 PathProgramCache]: Analyzing trace with hash 744071900, now seen corresponding path program 45 times [2021-06-05 22:36:26,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:26,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210968331] [2021-06-05 22:36:26,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:26,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:26,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:26,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:26,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210968331] [2021-06-05 22:36:26,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210968331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:26,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810324641] [2021-06-05 22:36:26,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:27,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:36:27,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:27,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:36:27,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:27,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:36:27,155 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:27,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:27,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:27,158 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:36:27,193 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:27,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810324641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:27,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:27,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 22:36:27,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180453308] [2021-06-05 22:36:27,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:36:27,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:27,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:36:27,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:36:27,194 INFO L87 Difference]: Start difference. First operand 8520 states and 38088 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:29,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:29,014 INFO L93 Difference]: Finished difference Result 9476 states and 41964 transitions. [2021-06-05 22:36:29,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 22:36:29,014 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:36:29,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:29,037 INFO L225 Difference]: With dead ends: 9476 [2021-06-05 22:36:29,037 INFO L226 Difference]: Without dead ends: 9365 [2021-06-05 22:36:29,037 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 1379.0ms TimeCoverageRelationStatistics Valid=413, Invalid=2037, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 22:36:29,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9365 states. [2021-06-05 22:36:29,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9365 to 8504. [2021-06-05 22:36:29,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8504 states, 8503 states have (on average 4.472068681641773) internal successors, (38026), 8503 states have internal predecessors, (38026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:29,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8504 states to 8504 states and 38026 transitions. [2021-06-05 22:36:29,203 INFO L78 Accepts]: Start accepts. Automaton has 8504 states and 38026 transitions. Word has length 30 [2021-06-05 22:36:29,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:29,203 INFO L482 AbstractCegarLoop]: Abstraction has 8504 states and 38026 transitions. [2021-06-05 22:36:29,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:29,203 INFO L276 IsEmpty]: Start isEmpty. Operand 8504 states and 38026 transitions. [2021-06-05 22:36:29,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:36:29,218 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:29,218 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:29,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable544,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:29,419 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:29,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:29,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1029023822, now seen corresponding path program 15 times [2021-06-05 22:36:29,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:29,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487867259] [2021-06-05 22:36:29,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:29,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:29,603 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:29,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:29,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487867259] [2021-06-05 22:36:29,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487867259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:29,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446022513] [2021-06-05 22:36:29,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:29,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:36:29,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:29,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:36:29,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:29,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:36:29,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:36:29,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 22:36:29,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:29,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:29,919 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:29,919 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 22:36:29,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:29,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446022513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:29,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:29,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 22:36:29,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92891250] [2021-06-05 22:36:29,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:36:29,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:29,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:36:29,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:36:29,957 INFO L87 Difference]: Start difference. First operand 8504 states and 38026 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:31,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:31,709 INFO L93 Difference]: Finished difference Result 9975 states and 43793 transitions. [2021-06-05 22:36:31,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 22:36:31,710 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:36:31,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:31,732 INFO L225 Difference]: With dead ends: 9975 [2021-06-05 22:36:31,732 INFO L226 Difference]: Without dead ends: 9781 [2021-06-05 22:36:31,733 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 1451.4ms TimeCoverageRelationStatistics Valid=472, Invalid=2608, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 22:36:31,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9781 states. [2021-06-05 22:36:31,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9781 to 8504. [2021-06-05 22:36:31,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8504 states, 8503 states have (on average 4.472068681641773) internal successors, (38026), 8503 states have internal predecessors, (38026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:31,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8504 states to 8504 states and 38026 transitions. [2021-06-05 22:36:31,890 INFO L78 Accepts]: Start accepts. Automaton has 8504 states and 38026 transitions. Word has length 30 [2021-06-05 22:36:31,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:31,890 INFO L482 AbstractCegarLoop]: Abstraction has 8504 states and 38026 transitions. [2021-06-05 22:36:31,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:31,890 INFO L276 IsEmpty]: Start isEmpty. Operand 8504 states and 38026 transitions. [2021-06-05 22:36:31,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:36:31,907 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:31,907 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:32,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable545 [2021-06-05 22:36:32,108 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:32,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:32,108 INFO L82 PathProgramCache]: Analyzing trace with hash 275715572, now seen corresponding path program 46 times [2021-06-05 22:36:32,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:32,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799693589] [2021-06-05 22:36:32,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:32,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:32,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:32,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:32,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799693589] [2021-06-05 22:36:32,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799693589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:32,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481381157] [2021-06-05 22:36:32,258 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:32,300 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:36:32,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:32,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:36:32,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:32,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 22:36:32,460 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:32,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:32,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:32,462 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 22:36:32,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:32,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481381157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:32,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:32,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:36:32,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856117255] [2021-06-05 22:36:32,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:36:32,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:32,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:36:32,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:36:32,500 INFO L87 Difference]: Start difference. First operand 8504 states and 38026 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:34,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:34,829 INFO L93 Difference]: Finished difference Result 9940 states and 43735 transitions. [2021-06-05 22:36:34,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 22:36:34,829 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:36:34,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:34,851 INFO L225 Difference]: With dead ends: 9940 [2021-06-05 22:36:34,852 INFO L226 Difference]: Without dead ends: 9775 [2021-06-05 22:36:34,852 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 1645.1ms TimeCoverageRelationStatistics Valid=456, Invalid=2736, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 22:36:34,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9775 states. [2021-06-05 22:36:34,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9775 to 8520. [2021-06-05 22:36:34,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8520 states, 8519 states have (on average 4.469069139570372) internal successors, (38072), 8519 states have internal predecessors, (38072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:35,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8520 states to 8520 states and 38072 transitions. [2021-06-05 22:36:35,016 INFO L78 Accepts]: Start accepts. Automaton has 8520 states and 38072 transitions. Word has length 30 [2021-06-05 22:36:35,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:35,016 INFO L482 AbstractCegarLoop]: Abstraction has 8520 states and 38072 transitions. [2021-06-05 22:36:35,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:35,016 INFO L276 IsEmpty]: Start isEmpty. Operand 8520 states and 38072 transitions. [2021-06-05 22:36:35,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:36:35,030 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:35,030 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:35,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable546,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:35,231 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:35,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:35,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1151526326, now seen corresponding path program 47 times [2021-06-05 22:36:35,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:35,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140572503] [2021-06-05 22:36:35,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:35,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:35,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:35,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:35,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140572503] [2021-06-05 22:36:35,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140572503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:35,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220946182] [2021-06-05 22:36:35,378 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:35,417 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:36:35,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:35,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:36:35,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:35,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 22:36:35,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:35,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:35,568 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:35,568 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 22:36:35,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:35,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220946182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:35,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:35,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 22:36:35,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670509233] [2021-06-05 22:36:35,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:36:35,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:35,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:36:35,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:36:35,622 INFO L87 Difference]: Start difference. First operand 8520 states and 38072 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:37,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:37,686 INFO L93 Difference]: Finished difference Result 9814 states and 43273 transitions. [2021-06-05 22:36:37,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 22:36:37,687 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:36:37,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:37,709 INFO L225 Difference]: With dead ends: 9814 [2021-06-05 22:36:37,709 INFO L226 Difference]: Without dead ends: 9705 [2021-06-05 22:36:37,710 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 1503.6ms TimeCoverageRelationStatistics Valid=398, Invalid=2052, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 22:36:37,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9705 states. [2021-06-05 22:36:37,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9705 to 8520. [2021-06-05 22:36:37,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8520 states, 8519 states have (on average 4.469069139570372) internal successors, (38072), 8519 states have internal predecessors, (38072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:37,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8520 states to 8520 states and 38072 transitions. [2021-06-05 22:36:37,874 INFO L78 Accepts]: Start accepts. Automaton has 8520 states and 38072 transitions. Word has length 30 [2021-06-05 22:36:37,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:37,874 INFO L482 AbstractCegarLoop]: Abstraction has 8520 states and 38072 transitions. [2021-06-05 22:36:37,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:37,874 INFO L276 IsEmpty]: Start isEmpty. Operand 8520 states and 38072 transitions. [2021-06-05 22:36:37,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:36:37,889 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:37,889 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:38,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable547 [2021-06-05 22:36:38,092 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:38,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:38,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1657872592, now seen corresponding path program 48 times [2021-06-05 22:36:38,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:38,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265929908] [2021-06-05 22:36:38,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:38,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:38,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:38,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:38,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265929908] [2021-06-05 22:36:38,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265929908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:38,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832560011] [2021-06-05 22:36:38,306 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:38,342 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:36:38,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:38,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:36:38,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:38,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:36:38,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:36:38,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 22:36:38,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:38,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:38,535 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:38,535 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:9 [2021-06-05 22:36:38,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:38,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832560011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:38,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:38,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 22:36:38,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394895436] [2021-06-05 22:36:38,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:36:38,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:38,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:36:38,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:36:38,591 INFO L87 Difference]: Start difference. First operand 8520 states and 38072 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:40,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:40,588 INFO L93 Difference]: Finished difference Result 9787 states and 43113 transitions. [2021-06-05 22:36:40,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 22:36:40,589 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:36:40,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:40,611 INFO L225 Difference]: With dead ends: 9787 [2021-06-05 22:36:40,611 INFO L226 Difference]: Without dead ends: 9645 [2021-06-05 22:36:40,611 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 935 ImplicationChecksByTransitivity, 1636.3ms TimeCoverageRelationStatistics Valid=528, Invalid=2778, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 22:36:40,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9645 states. [2021-06-05 22:36:40,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9645 to 8506. [2021-06-05 22:36:40,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8506 states, 8505 states have (on average 4.471017048794827) internal successors, (38026), 8505 states have internal predecessors, (38026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:40,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8506 states to 8506 states and 38026 transitions. [2021-06-05 22:36:40,778 INFO L78 Accepts]: Start accepts. Automaton has 8506 states and 38026 transitions. Word has length 30 [2021-06-05 22:36:40,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:40,778 INFO L482 AbstractCegarLoop]: Abstraction has 8506 states and 38026 transitions. [2021-06-05 22:36:40,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:40,778 INFO L276 IsEmpty]: Start isEmpty. Operand 8506 states and 38026 transitions. [2021-06-05 22:36:40,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:36:40,793 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:40,793 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:40,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable548,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:40,993 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:40,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:40,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1108317834, now seen corresponding path program 49 times [2021-06-05 22:36:40,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:40,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668432623] [2021-06-05 22:36:40,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:40,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:41,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:41,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:41,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668432623] [2021-06-05 22:36:41,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668432623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:41,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862787506] [2021-06-05 22:36:41,156 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:41,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:41,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:36:41,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:41,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:36:41,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:41,347 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:41,347 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:41,347 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 22:36:41,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:41,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862787506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:41,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:41,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:36:41,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016718716] [2021-06-05 22:36:41,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:36:41,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:41,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:36:41,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:36:41,418 INFO L87 Difference]: Start difference. First operand 8506 states and 38026 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:43,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:43,070 INFO L93 Difference]: Finished difference Result 9482 states and 41976 transitions. [2021-06-05 22:36:43,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 22:36:43,070 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:36:43,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:43,092 INFO L225 Difference]: With dead ends: 9482 [2021-06-05 22:36:43,092 INFO L226 Difference]: Without dead ends: 9384 [2021-06-05 22:36:43,092 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 1323.0ms TimeCoverageRelationStatistics Valid=292, Invalid=1348, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:36:43,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9384 states. [2021-06-05 22:36:43,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9384 to 8518. [2021-06-05 22:36:43,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8518 states, 8517 states have (on average 4.470823059762827) internal successors, (38078), 8517 states have internal predecessors, (38078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:43,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8518 states to 8518 states and 38078 transitions. [2021-06-05 22:36:43,255 INFO L78 Accepts]: Start accepts. Automaton has 8518 states and 38078 transitions. Word has length 30 [2021-06-05 22:36:43,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:43,255 INFO L482 AbstractCegarLoop]: Abstraction has 8518 states and 38078 transitions. [2021-06-05 22:36:43,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:43,255 INFO L276 IsEmpty]: Start isEmpty. Operand 8518 states and 38078 transitions. [2021-06-05 22:36:43,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:36:43,269 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:43,269 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:43,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable549 [2021-06-05 22:36:43,473 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:43,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:43,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1376495514, now seen corresponding path program 50 times [2021-06-05 22:36:43,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:43,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902337579] [2021-06-05 22:36:43,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:43,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:43,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:43,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:43,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902337579] [2021-06-05 22:36:43,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902337579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:43,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446256991] [2021-06-05 22:36:43,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:43,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:36:43,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:43,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:36:43,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:43,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:36:43,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:43,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:43,763 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:43,763 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 22:36:43,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:43,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446256991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:43,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:43,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 22:36:43,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806713432] [2021-06-05 22:36:43,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:36:43,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:43,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:36:43,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:36:43,815 INFO L87 Difference]: Start difference. First operand 8518 states and 38078 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:45,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:45,171 INFO L93 Difference]: Finished difference Result 9459 states and 41899 transitions. [2021-06-05 22:36:45,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:36:45,172 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:36:45,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:45,194 INFO L225 Difference]: With dead ends: 9459 [2021-06-05 22:36:45,194 INFO L226 Difference]: Without dead ends: 9356 [2021-06-05 22:36:45,194 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 977.3ms TimeCoverageRelationStatistics Valid=256, Invalid=1150, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:36:45,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9356 states. [2021-06-05 22:36:45,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9356 to 8512. [2021-06-05 22:36:45,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8512 states, 8511 states have (on average 4.470684995887675) internal successors, (38050), 8511 states have internal predecessors, (38050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:45,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8512 states to 8512 states and 38050 transitions. [2021-06-05 22:36:45,372 INFO L78 Accepts]: Start accepts. Automaton has 8512 states and 38050 transitions. Word has length 30 [2021-06-05 22:36:45,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:45,372 INFO L482 AbstractCegarLoop]: Abstraction has 8512 states and 38050 transitions. [2021-06-05 22:36:45,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:45,372 INFO L276 IsEmpty]: Start isEmpty. Operand 8512 states and 38050 transitions. [2021-06-05 22:36:45,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:36:45,397 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:45,397 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:45,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable550,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:45,617 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:45,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:45,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1442285456, now seen corresponding path program 51 times [2021-06-05 22:36:45,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:45,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524718439] [2021-06-05 22:36:45,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:45,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:45,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:45,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:45,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524718439] [2021-06-05 22:36:45,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524718439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:45,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618351096] [2021-06-05 22:36:45,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:45,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:36:45,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:45,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:36:45,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:45,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:36:45,975 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:45,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:45,980 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:45,980 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 22:36:46,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:46,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618351096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:46,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:46,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:36:46,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676087744] [2021-06-05 22:36:46,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:36:46,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:46,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:36:46,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:36:46,056 INFO L87 Difference]: Start difference. First operand 8512 states and 38050 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:47,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:47,725 INFO L93 Difference]: Finished difference Result 9506 states and 42062 transitions. [2021-06-05 22:36:47,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 22:36:47,725 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:36:47,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:47,747 INFO L225 Difference]: With dead ends: 9506 [2021-06-05 22:36:47,747 INFO L226 Difference]: Without dead ends: 9408 [2021-06-05 22:36:47,747 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1296.4ms TimeCoverageRelationStatistics Valid=343, Invalid=1637, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:36:47,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9408 states. [2021-06-05 22:36:47,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9408 to 8518. [2021-06-05 22:36:47,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8518 states, 8517 states have (on average 4.470588235294118) internal successors, (38076), 8517 states have internal predecessors, (38076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:47,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8518 states to 8518 states and 38076 transitions. [2021-06-05 22:36:47,910 INFO L78 Accepts]: Start accepts. Automaton has 8518 states and 38076 transitions. Word has length 30 [2021-06-05 22:36:47,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:47,910 INFO L482 AbstractCegarLoop]: Abstraction has 8518 states and 38076 transitions. [2021-06-05 22:36:47,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:47,911 INFO L276 IsEmpty]: Start isEmpty. Operand 8518 states and 38076 transitions. [2021-06-05 22:36:47,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:36:47,932 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:47,932 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:48,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable551 [2021-06-05 22:36:48,146 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:48,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:48,146 INFO L82 PathProgramCache]: Analyzing trace with hash -821801390, now seen corresponding path program 52 times [2021-06-05 22:36:48,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:48,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056208862] [2021-06-05 22:36:48,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:48,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:48,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:48,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:48,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056208862] [2021-06-05 22:36:48,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056208862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:48,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578744453] [2021-06-05 22:36:48,274 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:48,309 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:36:48,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:48,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:36:48,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:48,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:36:48,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:48,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:48,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:48,428 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 22:36:48,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:48,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578744453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:48,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:48,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:36:48,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126327327] [2021-06-05 22:36:48,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:36:48,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:48,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:36:48,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:36:48,494 INFO L87 Difference]: Start difference. First operand 8518 states and 38076 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:49,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:49,832 INFO L93 Difference]: Finished difference Result 9492 states and 42015 transitions. [2021-06-05 22:36:49,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 22:36:49,833 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:36:49,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:49,855 INFO L225 Difference]: With dead ends: 9492 [2021-06-05 22:36:49,855 INFO L226 Difference]: Without dead ends: 9400 [2021-06-05 22:36:49,855 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 1022.0ms TimeCoverageRelationStatistics Valid=317, Invalid=1663, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:36:49,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9400 states. [2021-06-05 22:36:49,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9400 to 8515. [2021-06-05 22:36:49,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8515 states, 8514 states have (on average 4.470519144937749) internal successors, (38062), 8514 states have internal predecessors, (38062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:50,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8515 states to 8515 states and 38062 transitions. [2021-06-05 22:36:50,025 INFO L78 Accepts]: Start accepts. Automaton has 8515 states and 38062 transitions. Word has length 30 [2021-06-05 22:36:50,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:50,025 INFO L482 AbstractCegarLoop]: Abstraction has 8515 states and 38062 transitions. [2021-06-05 22:36:50,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:50,025 INFO L276 IsEmpty]: Start isEmpty. Operand 8515 states and 38062 transitions. [2021-06-05 22:36:50,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:36:50,040 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:50,040 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:50,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable552,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:50,240 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:50,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:50,241 INFO L82 PathProgramCache]: Analyzing trace with hash -50538734, now seen corresponding path program 53 times [2021-06-05 22:36:50,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:50,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473840281] [2021-06-05 22:36:50,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:50,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:50,366 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:50,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:50,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473840281] [2021-06-05 22:36:50,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473840281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:50,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594084288] [2021-06-05 22:36:50,367 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:50,474 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:36:50,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:50,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:36:50,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:50,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:36:50,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:50,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:50,591 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:50,591 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 22:36:50,663 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:50,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594084288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:50,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:50,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:36:50,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019070231] [2021-06-05 22:36:50,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:36:50,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:50,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:36:50,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:36:50,664 INFO L87 Difference]: Start difference. First operand 8515 states and 38062 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:52,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:52,417 INFO L93 Difference]: Finished difference Result 9632 states and 42585 transitions. [2021-06-05 22:36:52,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 22:36:52,418 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:36:52,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:52,440 INFO L225 Difference]: With dead ends: 9632 [2021-06-05 22:36:52,440 INFO L226 Difference]: Without dead ends: 9523 [2021-06-05 22:36:52,440 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 1243.9ms TimeCoverageRelationStatistics Valid=343, Invalid=1463, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 22:36:52,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9523 states. [2021-06-05 22:36:52,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9523 to 8515. [2021-06-05 22:36:52,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8515 states, 8514 states have (on average 4.470519144937749) internal successors, (38062), 8514 states have internal predecessors, (38062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:52,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8515 states to 8515 states and 38062 transitions. [2021-06-05 22:36:52,607 INFO L78 Accepts]: Start accepts. Automaton has 8515 states and 38062 transitions. Word has length 30 [2021-06-05 22:36:52,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:52,607 INFO L482 AbstractCegarLoop]: Abstraction has 8515 states and 38062 transitions. [2021-06-05 22:36:52,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:52,607 INFO L276 IsEmpty]: Start isEmpty. Operand 8515 states and 38062 transitions. [2021-06-05 22:36:52,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:36:52,622 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:52,622 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:52,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable553 [2021-06-05 22:36:52,822 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:52,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:52,823 INFO L82 PathProgramCache]: Analyzing trace with hash -687005588, now seen corresponding path program 54 times [2021-06-05 22:36:52,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:52,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34635202] [2021-06-05 22:36:52,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:52,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:52,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:52,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:52,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34635202] [2021-06-05 22:36:52,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34635202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:52,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465680988] [2021-06-05 22:36:52,952 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:52,987 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:36:52,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:36:52,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:36:52,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:53,104 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:53,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 22:36:53,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:53,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:53,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:53,116 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 22:36:53,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:53,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465680988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:53,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:53,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:36:53,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489946848] [2021-06-05 22:36:53,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:36:53,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:53,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:36:53,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:36:53,241 INFO L87 Difference]: Start difference. First operand 8515 states and 38062 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:55,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:55,480 INFO L93 Difference]: Finished difference Result 9801 states and 43004 transitions. [2021-06-05 22:36:55,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 22:36:55,480 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:36:55,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:55,500 INFO L225 Difference]: With dead ends: 9801 [2021-06-05 22:36:55,500 INFO L226 Difference]: Without dead ends: 9518 [2021-06-05 22:36:55,500 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 1667.7ms TimeCoverageRelationStatistics Valid=541, Invalid=2651, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 22:36:55,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9518 states. [2021-06-05 22:36:55,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9518 to 8509. [2021-06-05 22:36:55,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8509 states, 8508 states have (on average 4.471673718852845) internal successors, (38045), 8508 states have internal predecessors, (38045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:55,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8509 states to 8509 states and 38045 transitions. [2021-06-05 22:36:55,638 INFO L78 Accepts]: Start accepts. Automaton has 8509 states and 38045 transitions. Word has length 30 [2021-06-05 22:36:55,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:55,638 INFO L482 AbstractCegarLoop]: Abstraction has 8509 states and 38045 transitions. [2021-06-05 22:36:55,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:55,638 INFO L276 IsEmpty]: Start isEmpty. Operand 8509 states and 38045 transitions. [2021-06-05 22:36:55,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:36:55,652 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:55,652 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:55,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable554 [2021-06-05 22:36:55,852 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:55,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:55,853 INFO L82 PathProgramCache]: Analyzing trace with hash 106058870, now seen corresponding path program 55 times [2021-06-05 22:36:55,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:55,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023059000] [2021-06-05 22:36:55,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:55,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:56,025 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:56,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:56,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023059000] [2021-06-05 22:36:56,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023059000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:56,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124226633] [2021-06-05 22:36:56,025 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:56,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:56,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:36:56,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:56,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 22:36:56,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:56,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:56,201 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:56,202 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 22:36:56,235 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:56,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124226633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:56,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:56,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:36:56,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551025844] [2021-06-05 22:36:56,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:36:56,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:56,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:36:56,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:36:56,236 INFO L87 Difference]: Start difference. First operand 8509 states and 38045 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:58,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:36:58,926 INFO L93 Difference]: Finished difference Result 13334 states and 56795 transitions. [2021-06-05 22:36:58,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 22:36:58,927 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:36:58,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:36:58,958 INFO L225 Difference]: With dead ends: 13334 [2021-06-05 22:36:58,958 INFO L226 Difference]: Without dead ends: 13100 [2021-06-05 22:36:58,959 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1351 ImplicationChecksByTransitivity, 1739.5ms TimeCoverageRelationStatistics Valid=596, Invalid=3564, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 22:36:58,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13100 states. [2021-06-05 22:36:59,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13100 to 8714. [2021-06-05 22:36:59,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8714 states, 8713 states have (on average 4.47779180534833) internal successors, (39015), 8713 states have internal predecessors, (39015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:59,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8714 states to 8714 states and 39015 transitions. [2021-06-05 22:36:59,165 INFO L78 Accepts]: Start accepts. Automaton has 8714 states and 39015 transitions. Word has length 30 [2021-06-05 22:36:59,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:36:59,165 INFO L482 AbstractCegarLoop]: Abstraction has 8714 states and 39015 transitions. [2021-06-05 22:36:59,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:36:59,166 INFO L276 IsEmpty]: Start isEmpty. Operand 8714 states and 39015 transitions. [2021-06-05 22:36:59,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:36:59,181 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:36:59,181 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:36:59,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable556,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:59,381 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:36:59,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:36:59,381 INFO L82 PathProgramCache]: Analyzing trace with hash -604240288, now seen corresponding path program 55 times [2021-06-05 22:36:59,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:36:59,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924701070] [2021-06-05 22:36:59,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:36:59,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:59,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:59,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:36:59,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924701070] [2021-06-05 22:36:59,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924701070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:59,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70566465] [2021-06-05 22:36:59,512 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:36:59,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:36:59,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:36:59,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:36:59,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 22:36:59,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:36:59,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:36:59,686 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:36:59,686 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 22:36:59,720 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:36:59,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70566465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:36:59,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:36:59,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:36:59,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376176505] [2021-06-05 22:36:59,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:36:59,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:36:59,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:36:59,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:36:59,721 INFO L87 Difference]: Start difference. First operand 8714 states and 39015 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:02,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:02,913 INFO L93 Difference]: Finished difference Result 13805 states and 58727 transitions. [2021-06-05 22:37:02,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 22:37:02,914 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:37:02,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:02,947 INFO L225 Difference]: With dead ends: 13805 [2021-06-05 22:37:02,947 INFO L226 Difference]: Without dead ends: 13601 [2021-06-05 22:37:02,947 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1599 ImplicationChecksByTransitivity, 1793.1ms TimeCoverageRelationStatistics Valid=736, Invalid=4234, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 22:37:03,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13601 states. [2021-06-05 22:37:03,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13601 to 8797. [2021-06-05 22:37:03,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8797 states, 8796 states have (on average 4.482150977717144) internal successors, (39425), 8796 states have internal predecessors, (39425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:03,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8797 states to 8797 states and 39425 transitions. [2021-06-05 22:37:03,204 INFO L78 Accepts]: Start accepts. Automaton has 8797 states and 39425 transitions. Word has length 30 [2021-06-05 22:37:03,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:03,205 INFO L482 AbstractCegarLoop]: Abstraction has 8797 states and 39425 transitions. [2021-06-05 22:37:03,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:03,205 INFO L276 IsEmpty]: Start isEmpty. Operand 8797 states and 39425 transitions. [2021-06-05 22:37:03,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:37:03,220 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:03,220 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:03,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable557 [2021-06-05 22:37:03,420 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:03,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:03,421 INFO L82 PathProgramCache]: Analyzing trace with hash -869082702, now seen corresponding path program 56 times [2021-06-05 22:37:03,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:03,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54420457] [2021-06-05 22:37:03,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:03,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:03,568 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:03,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:03,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54420457] [2021-06-05 22:37:03,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54420457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:03,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112745253] [2021-06-05 22:37:03,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:03,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:37:03,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:03,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:37:03,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:03,732 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:03,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 22:37:03,733 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:03,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:03,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:03,744 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 22:37:03,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:03,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112745253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:03,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:03,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:37:03,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715573319] [2021-06-05 22:37:03,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:37:03,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:03,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:37:03,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:37:03,846 INFO L87 Difference]: Start difference. First operand 8797 states and 39425 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:07,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:07,602 INFO L93 Difference]: Finished difference Result 13188 states and 56197 transitions. [2021-06-05 22:37:07,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 22:37:07,603 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:37:07,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:07,643 INFO L225 Difference]: With dead ends: 13188 [2021-06-05 22:37:07,643 INFO L226 Difference]: Without dead ends: 12652 [2021-06-05 22:37:07,644 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2253 ImplicationChecksByTransitivity, 2554.4ms TimeCoverageRelationStatistics Valid=937, Invalid=5705, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 22:37:07,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12652 states. [2021-06-05 22:37:07,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12652 to 8830. [2021-06-05 22:37:07,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8830 states, 8829 states have (on average 4.483180428134556) internal successors, (39582), 8829 states have internal predecessors, (39582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:07,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8830 states to 8830 states and 39582 transitions. [2021-06-05 22:37:07,910 INFO L78 Accepts]: Start accepts. Automaton has 8830 states and 39582 transitions. Word has length 30 [2021-06-05 22:37:07,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:07,910 INFO L482 AbstractCegarLoop]: Abstraction has 8830 states and 39582 transitions. [2021-06-05 22:37:07,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:07,910 INFO L276 IsEmpty]: Start isEmpty. Operand 8830 states and 39582 transitions. [2021-06-05 22:37:07,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:37:07,926 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:07,926 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:08,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable558,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:08,127 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:08,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:08,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1182609098, now seen corresponding path program 57 times [2021-06-05 22:37:08,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:08,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424814196] [2021-06-05 22:37:08,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:08,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:08,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:08,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:08,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424814196] [2021-06-05 22:37:08,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424814196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:08,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363805016] [2021-06-05 22:37:08,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:08,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:37:08,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:08,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:37:08,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:08,446 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:08,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 22:37:08,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:08,457 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:08,458 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:08,458 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 22:37:08,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:08,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363805016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:08,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:08,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:37:08,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164491684] [2021-06-05 22:37:08,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:37:08,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:08,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:37:08,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:37:08,559 INFO L87 Difference]: Start difference. First operand 8830 states and 39582 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:11,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:11,942 INFO L93 Difference]: Finished difference Result 13465 states and 58176 transitions. [2021-06-05 22:37:11,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 22:37:11,942 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:37:11,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:11,969 INFO L225 Difference]: With dead ends: 13465 [2021-06-05 22:37:11,969 INFO L226 Difference]: Without dead ends: 13094 [2021-06-05 22:37:11,970 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2294 ImplicationChecksByTransitivity, 2546.8ms TimeCoverageRelationStatistics Valid=1048, Invalid=5594, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 22:37:11,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13094 states. [2021-06-05 22:37:12,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13094 to 8864. [2021-06-05 22:37:12,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8864 states, 8863 states have (on average 4.479860092519463) internal successors, (39705), 8863 states have internal predecessors, (39705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:12,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8864 states to 8864 states and 39705 transitions. [2021-06-05 22:37:12,167 INFO L78 Accepts]: Start accepts. Automaton has 8864 states and 39705 transitions. Word has length 30 [2021-06-05 22:37:12,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:12,167 INFO L482 AbstractCegarLoop]: Abstraction has 8864 states and 39705 transitions. [2021-06-05 22:37:12,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:12,167 INFO L276 IsEmpty]: Start isEmpty. Operand 8864 states and 39705 transitions. [2021-06-05 22:37:12,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:37:12,182 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:12,183 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:12,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable561,268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:12,383 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:12,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:12,383 INFO L82 PathProgramCache]: Analyzing trace with hash -2042108196, now seen corresponding path program 56 times [2021-06-05 22:37:12,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:12,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115747607] [2021-06-05 22:37:12,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:12,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:12,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:12,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:12,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115747607] [2021-06-05 22:37:12,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115747607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:12,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038617711] [2021-06-05 22:37:12,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:12,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:37:12,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:12,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:37:12,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:12,700 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:12,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 22:37:12,701 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:12,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:12,711 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:12,711 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 22:37:12,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:12,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038617711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:12,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:12,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 22:37:12,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905481096] [2021-06-05 22:37:12,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:37:12,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:12,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:37:12,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:37:12,797 INFO L87 Difference]: Start difference. First operand 8864 states and 39705 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:15,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:15,886 INFO L93 Difference]: Finished difference Result 12619 states and 54304 transitions. [2021-06-05 22:37:15,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 22:37:15,886 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:37:15,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:15,917 INFO L225 Difference]: With dead ends: 12619 [2021-06-05 22:37:15,917 INFO L226 Difference]: Without dead ends: 12324 [2021-06-05 22:37:15,917 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1737 ImplicationChecksByTransitivity, 2099.0ms TimeCoverageRelationStatistics Valid=792, Invalid=4464, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 22:37:15,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12324 states. [2021-06-05 22:37:16,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12324 to 8900. [2021-06-05 22:37:16,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8900 states, 8899 states have (on average 4.481065288234633) internal successors, (39877), 8899 states have internal predecessors, (39877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:16,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8900 states to 8900 states and 39877 transitions. [2021-06-05 22:37:16,121 INFO L78 Accepts]: Start accepts. Automaton has 8900 states and 39877 transitions. Word has length 30 [2021-06-05 22:37:16,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:16,121 INFO L482 AbstractCegarLoop]: Abstraction has 8900 states and 39877 transitions. [2021-06-05 22:37:16,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:16,121 INFO L276 IsEmpty]: Start isEmpty. Operand 8900 states and 39877 transitions. [2021-06-05 22:37:16,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:37:16,137 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:16,137 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:16,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable564 [2021-06-05 22:37:16,338 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:16,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:16,338 INFO L82 PathProgramCache]: Analyzing trace with hash -207054482, now seen corresponding path program 57 times [2021-06-05 22:37:16,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:16,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726184558] [2021-06-05 22:37:16,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:16,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:16,462 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:16,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:16,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726184558] [2021-06-05 22:37:16,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726184558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:16,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183391873] [2021-06-05 22:37:16,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:16,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:37:16,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:16,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:37:16,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:16,624 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:16,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 22:37:16,626 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:16,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:16,636 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:16,636 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 22:37:16,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:16,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183391873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:16,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:16,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:37:16,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943184093] [2021-06-05 22:37:16,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:37:16,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:16,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:37:16,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:37:16,737 INFO L87 Difference]: Start difference. First operand 8900 states and 39877 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:20,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:20,300 INFO L93 Difference]: Finished difference Result 12183 states and 53001 transitions. [2021-06-05 22:37:20,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-05 22:37:20,301 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:37:20,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:20,328 INFO L225 Difference]: With dead ends: 12183 [2021-06-05 22:37:20,328 INFO L226 Difference]: Without dead ends: 11928 [2021-06-05 22:37:20,328 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2321 ImplicationChecksByTransitivity, 2708.6ms TimeCoverageRelationStatistics Valid=1123, Invalid=5519, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 22:37:20,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11928 states. [2021-06-05 22:37:20,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11928 to 8897. [2021-06-05 22:37:20,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8897 states, 8896 states have (on average 4.482014388489208) internal successors, (39872), 8896 states have internal predecessors, (39872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:20,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8897 states to 8897 states and 39872 transitions. [2021-06-05 22:37:20,535 INFO L78 Accepts]: Start accepts. Automaton has 8897 states and 39872 transitions. Word has length 30 [2021-06-05 22:37:20,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:20,535 INFO L482 AbstractCegarLoop]: Abstraction has 8897 states and 39872 transitions. [2021-06-05 22:37:20,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:20,535 INFO L276 IsEmpty]: Start isEmpty. Operand 8897 states and 39872 transitions. [2021-06-05 22:37:20,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:37:20,550 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:20,550 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:20,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable566,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:20,750 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:20,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:20,751 INFO L82 PathProgramCache]: Analyzing trace with hash 2080656952, now seen corresponding path program 58 times [2021-06-05 22:37:20,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:20,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071675342] [2021-06-05 22:37:20,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:20,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:20,870 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:20,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:20,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071675342] [2021-06-05 22:37:20,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071675342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:20,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884753247] [2021-06-05 22:37:20,870 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:20,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:37:20,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:20,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:37:20,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:21,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:37:21,024 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:21,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:21,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:21,027 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:37:21,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:21,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884753247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:21,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:21,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 22:37:21,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908217731] [2021-06-05 22:37:21,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:37:21,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:21,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:37:21,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:37:21,063 INFO L87 Difference]: Start difference. First operand 8897 states and 39872 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:22,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:22,856 INFO L93 Difference]: Finished difference Result 12525 states and 54126 transitions. [2021-06-05 22:37:22,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 22:37:22,856 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:37:22,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:22,883 INFO L225 Difference]: With dead ends: 12525 [2021-06-05 22:37:22,883 INFO L226 Difference]: Without dead ends: 12364 [2021-06-05 22:37:22,883 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 1155.3ms TimeCoverageRelationStatistics Valid=531, Invalid=2331, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 22:37:22,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12364 states. [2021-06-05 22:37:23,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12364 to 8895. [2021-06-05 22:37:23,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8895 states, 8894 states have (on average 4.481110861254779) internal successors, (39855), 8894 states have internal predecessors, (39855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:23,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8895 states to 8895 states and 39855 transitions. [2021-06-05 22:37:23,071 INFO L78 Accepts]: Start accepts. Automaton has 8895 states and 39855 transitions. Word has length 30 [2021-06-05 22:37:23,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:23,071 INFO L482 AbstractCegarLoop]: Abstraction has 8895 states and 39855 transitions. [2021-06-05 22:37:23,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:23,072 INFO L276 IsEmpty]: Start isEmpty. Operand 8895 states and 39855 transitions. [2021-06-05 22:37:23,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:37:23,087 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:23,087 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:23,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable568 [2021-06-05 22:37:23,287 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:23,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:23,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1644847312, now seen corresponding path program 58 times [2021-06-05 22:37:23,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:23,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425254663] [2021-06-05 22:37:23,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:23,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:23,515 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:23,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:23,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425254663] [2021-06-05 22:37:23,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425254663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:23,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046303489] [2021-06-05 22:37:23,515 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:23,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:37:23,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:23,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:37:23,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:23,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 22:37:23,688 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:23,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:23,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:23,690 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 22:37:23,723 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:23,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046303489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:23,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:23,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:37:23,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774329832] [2021-06-05 22:37:23,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:37:23,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:23,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:37:23,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:37:23,724 INFO L87 Difference]: Start difference. First operand 8895 states and 39855 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:26,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:26,403 INFO L93 Difference]: Finished difference Result 14961 states and 63207 transitions. [2021-06-05 22:37:26,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 22:37:26,403 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:37:26,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:26,439 INFO L225 Difference]: With dead ends: 14961 [2021-06-05 22:37:26,440 INFO L226 Difference]: Without dead ends: 14692 [2021-06-05 22:37:26,440 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1473 ImplicationChecksByTransitivity, 1750.3ms TimeCoverageRelationStatistics Valid=627, Invalid=3929, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 22:37:26,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14692 states. [2021-06-05 22:37:26,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14692 to 9127. [2021-06-05 22:37:26,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9127 states, 9126 states have (on average 4.484440061363138) internal successors, (40925), 9126 states have internal predecessors, (40925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:26,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9127 states to 9127 states and 40925 transitions. [2021-06-05 22:37:26,679 INFO L78 Accepts]: Start accepts. Automaton has 9127 states and 40925 transitions. Word has length 30 [2021-06-05 22:37:26,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:26,679 INFO L482 AbstractCegarLoop]: Abstraction has 9127 states and 40925 transitions. [2021-06-05 22:37:26,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:26,679 INFO L276 IsEmpty]: Start isEmpty. Operand 9127 states and 40925 transitions. [2021-06-05 22:37:26,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:37:26,695 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:26,695 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:26,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable569,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:26,895 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:26,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:26,896 INFO L82 PathProgramCache]: Analyzing trace with hash 934548154, now seen corresponding path program 59 times [2021-06-05 22:37:26,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:26,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262444584] [2021-06-05 22:37:26,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:26,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:27,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:27,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:27,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262444584] [2021-06-05 22:37:27,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262444584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:27,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807017870] [2021-06-05 22:37:27,023 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:27,058 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:37:27,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:27,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:37:27,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:27,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 22:37:27,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:27,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:27,197 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:27,197 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 22:37:27,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:27,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807017870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:27,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:27,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:37:27,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741896393] [2021-06-05 22:37:27,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:37:27,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:27,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:37:27,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:37:27,231 INFO L87 Difference]: Start difference. First operand 9127 states and 40925 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:30,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:30,418 INFO L93 Difference]: Finished difference Result 15149 states and 64060 transitions. [2021-06-05 22:37:30,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 22:37:30,419 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:37:30,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:30,455 INFO L225 Difference]: With dead ends: 15149 [2021-06-05 22:37:30,455 INFO L226 Difference]: Without dead ends: 14955 [2021-06-05 22:37:30,455 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1739 ImplicationChecksByTransitivity, 1842.8ms TimeCoverageRelationStatistics Valid=771, Invalid=4631, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 22:37:30,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14955 states. [2021-06-05 22:37:30,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14955 to 9107. [2021-06-05 22:37:30,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9107 states, 9106 states have (on average 4.485723698660224) internal successors, (40847), 9106 states have internal predecessors, (40847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:30,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9107 states to 9107 states and 40847 transitions. [2021-06-05 22:37:30,707 INFO L78 Accepts]: Start accepts. Automaton has 9107 states and 40847 transitions. Word has length 30 [2021-06-05 22:37:30,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:30,707 INFO L482 AbstractCegarLoop]: Abstraction has 9107 states and 40847 transitions. [2021-06-05 22:37:30,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:30,707 INFO L276 IsEmpty]: Start isEmpty. Operand 9107 states and 40847 transitions. [2021-06-05 22:37:30,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:37:30,723 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:30,723 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:30,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable570,273 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:30,923 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:30,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:30,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1510385476, now seen corresponding path program 59 times [2021-06-05 22:37:30,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:30,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492292750] [2021-06-05 22:37:30,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:30,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:31,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:31,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:31,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492292750] [2021-06-05 22:37:31,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492292750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:31,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680779263] [2021-06-05 22:37:31,071 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:31,107 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:37:31,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:31,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:37:31,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:31,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:37:31,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:37:31,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:37:31,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 22:37:31,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:31,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:31,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:31,272 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 22:37:31,316 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:31,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680779263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:31,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:31,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 22:37:31,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197304394] [2021-06-05 22:37:31,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:37:31,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:31,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:37:31,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:37:31,317 INFO L87 Difference]: Start difference. First operand 9107 states and 40847 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:33,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:33,278 INFO L93 Difference]: Finished difference Result 12199 states and 52637 transitions. [2021-06-05 22:37:33,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 22:37:33,279 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:37:33,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:33,306 INFO L225 Difference]: With dead ends: 12199 [2021-06-05 22:37:33,307 INFO L226 Difference]: Without dead ends: 12108 [2021-06-05 22:37:33,307 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 1390.2ms TimeCoverageRelationStatistics Valid=413, Invalid=2449, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 22:37:33,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12108 states. [2021-06-05 22:37:33,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12108 to 9107. [2021-06-05 22:37:33,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9107 states, 9106 states have (on average 4.485723698660224) internal successors, (40847), 9106 states have internal predecessors, (40847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:33,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9107 states to 9107 states and 40847 transitions. [2021-06-05 22:37:33,510 INFO L78 Accepts]: Start accepts. Automaton has 9107 states and 40847 transitions. Word has length 30 [2021-06-05 22:37:33,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:33,510 INFO L482 AbstractCegarLoop]: Abstraction has 9107 states and 40847 transitions. [2021-06-05 22:37:33,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:33,510 INFO L276 IsEmpty]: Start isEmpty. Operand 9107 states and 40847 transitions. [2021-06-05 22:37:33,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:37:33,525 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:33,525 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:33,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable571,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:33,726 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:33,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:33,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1172103252, now seen corresponding path program 60 times [2021-06-05 22:37:33,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:33,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326073310] [2021-06-05 22:37:33,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:33,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:33,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:33,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:33,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326073310] [2021-06-05 22:37:33,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326073310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:33,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719608181] [2021-06-05 22:37:33,877 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:33,913 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:37:33,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:33,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:37:33,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:34,049 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:34,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 22:37:34,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:34,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:34,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:34,061 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 22:37:34,167 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:34,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719608181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:34,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:34,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:37:34,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900166375] [2021-06-05 22:37:34,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:37:34,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:34,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:37:34,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:37:34,168 INFO L87 Difference]: Start difference. First operand 9107 states and 40847 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:38,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:38,189 INFO L93 Difference]: Finished difference Result 14629 states and 61863 transitions. [2021-06-05 22:37:38,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-06-05 22:37:38,190 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:37:38,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:38,224 INFO L225 Difference]: With dead ends: 14629 [2021-06-05 22:37:38,224 INFO L226 Difference]: Without dead ends: 14263 [2021-06-05 22:37:38,224 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2808 ImplicationChecksByTransitivity, 2535.3ms TimeCoverageRelationStatistics Valid=846, Invalid=7344, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 22:37:38,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14263 states. [2021-06-05 22:37:38,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14263 to 9432. [2021-06-05 22:37:38,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9432 states, 9431 states have (on average 4.491040186618598) internal successors, (42355), 9431 states have internal predecessors, (42355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:38,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9432 states to 9432 states and 42355 transitions. [2021-06-05 22:37:38,461 INFO L78 Accepts]: Start accepts. Automaton has 9432 states and 42355 transitions. Word has length 30 [2021-06-05 22:37:38,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:38,461 INFO L482 AbstractCegarLoop]: Abstraction has 9432 states and 42355 transitions. [2021-06-05 22:37:38,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:38,461 INFO L276 IsEmpty]: Start isEmpty. Operand 9432 states and 42355 transitions. [2021-06-05 22:37:38,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:37:38,477 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:38,478 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:38,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable572,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:38,678 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:38,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:38,678 INFO L82 PathProgramCache]: Analyzing trace with hash 314992000, now seen corresponding path program 60 times [2021-06-05 22:37:38,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:38,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847189655] [2021-06-05 22:37:38,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:38,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:38,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:38,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:38,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847189655] [2021-06-05 22:37:38,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847189655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:38,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637541270] [2021-06-05 22:37:38,803 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:38,838 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:37:38,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:38,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:37:38,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:38,974 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:38,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 22:37:38,975 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:38,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:38,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:38,985 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 22:37:39,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:39,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637541270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:39,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:39,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 22:37:39,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250077443] [2021-06-05 22:37:39,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:37:39,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:39,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:37:39,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:37:39,073 INFO L87 Difference]: Start difference. First operand 9432 states and 42355 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:42,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:42,058 INFO L93 Difference]: Finished difference Result 13862 states and 59544 transitions. [2021-06-05 22:37:42,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 22:37:42,059 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:37:42,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:42,091 INFO L225 Difference]: With dead ends: 13862 [2021-06-05 22:37:42,092 INFO L226 Difference]: Without dead ends: 13693 [2021-06-05 22:37:42,092 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1718 ImplicationChecksByTransitivity, 1822.6ms TimeCoverageRelationStatistics Valid=610, Invalid=4792, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 22:37:42,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13693 states. [2021-06-05 22:37:42,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13693 to 9447. [2021-06-05 22:37:42,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9447 states, 9446 states have (on average 4.4908956171924626) internal successors, (42421), 9446 states have internal predecessors, (42421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:42,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9447 states to 9447 states and 42421 transitions. [2021-06-05 22:37:42,327 INFO L78 Accepts]: Start accepts. Automaton has 9447 states and 42421 transitions. Word has length 30 [2021-06-05 22:37:42,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:42,327 INFO L482 AbstractCegarLoop]: Abstraction has 9447 states and 42421 transitions. [2021-06-05 22:37:42,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:42,327 INFO L276 IsEmpty]: Start isEmpty. Operand 9447 states and 42421 transitions. [2021-06-05 22:37:42,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:37:42,343 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:42,343 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:42,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable575 [2021-06-05 22:37:42,544 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:42,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:42,544 INFO L82 PathProgramCache]: Analyzing trace with hash 2081020532, now seen corresponding path program 61 times [2021-06-05 22:37:42,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:42,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132591715] [2021-06-05 22:37:42,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:42,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:42,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:42,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:42,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132591715] [2021-06-05 22:37:42,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132591715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:42,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127723846] [2021-06-05 22:37:42,677 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:42,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:42,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:37:42,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:42,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:37:42,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:42,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:42,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:42,840 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:37:42,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:42,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127723846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:42,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:42,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:37:42,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849156331] [2021-06-05 22:37:42,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:37:42,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:42,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:37:42,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:37:42,890 INFO L87 Difference]: Start difference. First operand 9447 states and 42421 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:45,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:45,815 INFO L93 Difference]: Finished difference Result 15468 states and 65541 transitions. [2021-06-05 22:37:45,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 22:37:45,816 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:37:45,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:45,854 INFO L225 Difference]: With dead ends: 15468 [2021-06-05 22:37:45,854 INFO L226 Difference]: Without dead ends: 15257 [2021-06-05 22:37:45,855 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1914 ImplicationChecksByTransitivity, 1642.3ms TimeCoverageRelationStatistics Valid=678, Invalid=4872, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 22:37:45,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15257 states. [2021-06-05 22:37:46,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15257 to 9628. [2021-06-05 22:37:46,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9628 states, 9627 states have (on average 4.4941310896437106) internal successors, (43265), 9627 states have internal predecessors, (43265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:46,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9628 states to 9628 states and 43265 transitions. [2021-06-05 22:37:46,113 INFO L78 Accepts]: Start accepts. Automaton has 9628 states and 43265 transitions. Word has length 30 [2021-06-05 22:37:46,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:46,113 INFO L482 AbstractCegarLoop]: Abstraction has 9628 states and 43265 transitions. [2021-06-05 22:37:46,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:46,113 INFO L276 IsEmpty]: Start isEmpty. Operand 9628 states and 43265 transitions. [2021-06-05 22:37:46,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:37:46,130 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:46,130 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:46,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable577,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:46,332 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:46,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:46,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1966270066, now seen corresponding path program 61 times [2021-06-05 22:37:46,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:46,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064456183] [2021-06-05 22:37:46,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:46,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:46,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:46,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:46,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064456183] [2021-06-05 22:37:46,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064456183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:46,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897941258] [2021-06-05 22:37:46,477 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:46,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:46,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:37:46,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:46,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:37:46,633 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:46,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:46,636 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:46,636 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 22:37:46,686 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:46,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897941258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:46,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:46,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:37:46,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142359589] [2021-06-05 22:37:46,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:37:46,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:46,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:37:46,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:37:46,687 INFO L87 Difference]: Start difference. First operand 9628 states and 43265 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:48,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:48,792 INFO L93 Difference]: Finished difference Result 13459 states and 58416 transitions. [2021-06-05 22:37:48,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 22:37:48,792 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:37:48,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:48,826 INFO L225 Difference]: With dead ends: 13459 [2021-06-05 22:37:48,826 INFO L226 Difference]: Without dead ends: 13338 [2021-06-05 22:37:48,826 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1514 ImplicationChecksByTransitivity, 1411.9ms TimeCoverageRelationStatistics Valid=735, Invalid=3821, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 22:37:48,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13338 states. [2021-06-05 22:37:49,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13338 to 9666. [2021-06-05 22:37:49,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9666 states, 9665 states have (on average 4.491257113295395) internal successors, (43408), 9665 states have internal predecessors, (43408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:49,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9666 states to 9666 states and 43408 transitions. [2021-06-05 22:37:49,063 INFO L78 Accepts]: Start accepts. Automaton has 9666 states and 43408 transitions. Word has length 30 [2021-06-05 22:37:49,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:49,064 INFO L482 AbstractCegarLoop]: Abstraction has 9666 states and 43408 transitions. [2021-06-05 22:37:49,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:49,064 INFO L276 IsEmpty]: Start isEmpty. Operand 9666 states and 43408 transitions. [2021-06-05 22:37:49,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:37:49,081 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:49,081 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:49,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable578 [2021-06-05 22:37:49,281 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:49,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:49,281 INFO L82 PathProgramCache]: Analyzing trace with hash -953481476, now seen corresponding path program 62 times [2021-06-05 22:37:49,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:49,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076278957] [2021-06-05 22:37:49,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:49,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:49,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:49,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:49,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076278957] [2021-06-05 22:37:49,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076278957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:49,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808521690] [2021-06-05 22:37:49,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:49,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:37:49,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:49,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:37:49,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:49,569 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:49,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 22:37:49,571 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:49,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:49,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:49,582 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 22:37:49,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:49,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808521690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:49,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:49,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:37:49,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5652222] [2021-06-05 22:37:49,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:37:49,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:49,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:37:49,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:37:49,714 INFO L87 Difference]: Start difference. First operand 9666 states and 43408 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:52,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:52,880 INFO L93 Difference]: Finished difference Result 12167 states and 53056 transitions. [2021-06-05 22:37:52,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 22:37:52,880 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:37:52,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:52,907 INFO L225 Difference]: With dead ends: 12167 [2021-06-05 22:37:52,907 INFO L226 Difference]: Without dead ends: 11959 [2021-06-05 22:37:52,907 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1569 ImplicationChecksByTransitivity, 2262.0ms TimeCoverageRelationStatistics Valid=666, Invalid=4304, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 22:37:52,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11959 states. [2021-06-05 22:37:53,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11959 to 9679. [2021-06-05 22:37:53,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9679 states, 9678 states have (on average 4.491010539367638) internal successors, (43464), 9678 states have internal predecessors, (43464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:53,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9679 states to 9679 states and 43464 transitions. [2021-06-05 22:37:53,117 INFO L78 Accepts]: Start accepts. Automaton has 9679 states and 43464 transitions. Word has length 30 [2021-06-05 22:37:53,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:53,118 INFO L482 AbstractCegarLoop]: Abstraction has 9679 states and 43464 transitions. [2021-06-05 22:37:53,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:53,118 INFO L276 IsEmpty]: Start isEmpty. Operand 9679 states and 43464 transitions. [2021-06-05 22:37:53,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:37:53,135 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:53,135 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:53,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable579,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:53,335 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:53,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:53,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1267007872, now seen corresponding path program 63 times [2021-06-05 22:37:53,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:53,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898103164] [2021-06-05 22:37:53,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:53,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:53,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:53,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:53,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898103164] [2021-06-05 22:37:53,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898103164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:53,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56655944] [2021-06-05 22:37:53,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:53,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:37:53,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:53,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:37:53,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:53,644 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:53,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 22:37:53,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:53,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:53,663 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:53,663 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 22:37:53,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:53,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56655944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:53,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:53,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:37:53,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312237935] [2021-06-05 22:37:53,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:37:53,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:53,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:37:53,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:37:53,797 INFO L87 Difference]: Start difference. First operand 9679 states and 43464 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:56,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:56,717 INFO L93 Difference]: Finished difference Result 12205 states and 53571 transitions. [2021-06-05 22:37:56,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 22:37:56,718 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:37:56,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:56,745 INFO L225 Difference]: With dead ends: 12205 [2021-06-05 22:37:56,745 INFO L226 Difference]: Without dead ends: 11981 [2021-06-05 22:37:56,746 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 2183.1ms TimeCoverageRelationStatistics Valid=733, Invalid=4097, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 22:37:56,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11981 states. [2021-06-05 22:37:56,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11981 to 9672. [2021-06-05 22:37:56,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9672 states, 9671 states have (on average 4.491572743253024) internal successors, (43438), 9671 states have internal predecessors, (43438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:56,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9672 states to 9672 states and 43438 transitions. [2021-06-05 22:37:56,956 INFO L78 Accepts]: Start accepts. Automaton has 9672 states and 43438 transitions. Word has length 30 [2021-06-05 22:37:56,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:37:56,956 INFO L482 AbstractCegarLoop]: Abstraction has 9672 states and 43438 transitions. [2021-06-05 22:37:56,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:56,956 INFO L276 IsEmpty]: Start isEmpty. Operand 9672 states and 43438 transitions. [2021-06-05 22:37:56,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:37:56,973 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:37:56,973 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:37:57,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable582,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:57,174 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:37:57,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:37:57,174 INFO L82 PathProgramCache]: Analyzing trace with hash 343082850, now seen corresponding path program 64 times [2021-06-05 22:37:57,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:37:57,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508755670] [2021-06-05 22:37:57,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:37:57,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:37:57,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:57,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:37:57,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508755670] [2021-06-05 22:37:57,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508755670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:57,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561443420] [2021-06-05 22:37:57,322 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:37:57,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:37:57,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:37:57,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:37:57,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:37:57,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:37:57,464 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:37:57,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:37:57,468 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:37:57,468 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 22:37:57,535 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:37:57,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561443420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:37:57,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:37:57,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:37:57,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854579044] [2021-06-05 22:37:57,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:37:57,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:37:57,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:37:57,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:37:57,536 INFO L87 Difference]: Start difference. First operand 9672 states and 43438 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:37:59,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:37:59,686 INFO L93 Difference]: Finished difference Result 12132 states and 53078 transitions. [2021-06-05 22:37:59,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 22:37:59,687 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:37:59,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:37:59,715 INFO L225 Difference]: With dead ends: 12132 [2021-06-05 22:37:59,715 INFO L226 Difference]: Without dead ends: 12027 [2021-06-05 22:37:59,716 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1308 ImplicationChecksByTransitivity, 1589.7ms TimeCoverageRelationStatistics Valid=619, Invalid=3413, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 22:37:59,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12027 states. [2021-06-05 22:37:59,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12027 to 9674. [2021-06-05 22:37:59,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9674 states, 9673 states have (on average 4.491677866225577) internal successors, (43448), 9673 states have internal predecessors, (43448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:00,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9674 states to 9674 states and 43448 transitions. [2021-06-05 22:38:00,045 INFO L78 Accepts]: Start accepts. Automaton has 9674 states and 43448 transitions. Word has length 30 [2021-06-05 22:38:00,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:00,046 INFO L482 AbstractCegarLoop]: Abstraction has 9674 states and 43448 transitions. [2021-06-05 22:38:00,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:00,046 INFO L276 IsEmpty]: Start isEmpty. Operand 9674 states and 43448 transitions. [2021-06-05 22:38:00,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:38:00,065 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:00,065 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:00,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable585 [2021-06-05 22:38:00,266 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:00,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:00,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1007485592, now seen corresponding path program 65 times [2021-06-05 22:38:00,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:00,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145740677] [2021-06-05 22:38:00,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:00,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:00,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:00,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:00,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145740677] [2021-06-05 22:38:00,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145740677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:00,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992737616] [2021-06-05 22:38:00,411 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:00,447 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:38:00,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:00,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:38:00,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:00,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:38:00,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:00,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:00,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:00,558 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 22:38:00,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:00,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992737616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:00,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:00,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:38:00,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305486773] [2021-06-05 22:38:00,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:38:00,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:00,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:38:00,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:38:00,625 INFO L87 Difference]: Start difference. First operand 9674 states and 43448 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:02,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:02,731 INFO L93 Difference]: Finished difference Result 13227 states and 56952 transitions. [2021-06-05 22:38:02,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 22:38:02,732 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:38:02,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:02,764 INFO L225 Difference]: With dead ends: 13227 [2021-06-05 22:38:02,764 INFO L226 Difference]: Without dead ends: 13133 [2021-06-05 22:38:02,764 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1644 ImplicationChecksByTransitivity, 1517.8ms TimeCoverageRelationStatistics Valid=742, Invalid=4088, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 22:38:02,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13133 states. [2021-06-05 22:38:02,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13133 to 9693. [2021-06-05 22:38:02,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9693 states, 9692 states have (on average 4.491848947585638) internal successors, (43535), 9692 states have internal predecessors, (43535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:02,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9693 states to 9693 states and 43535 transitions. [2021-06-05 22:38:02,995 INFO L78 Accepts]: Start accepts. Automaton has 9693 states and 43535 transitions. Word has length 30 [2021-06-05 22:38:02,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:02,996 INFO L482 AbstractCegarLoop]: Abstraction has 9693 states and 43535 transitions. [2021-06-05 22:38:02,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:02,996 INFO L276 IsEmpty]: Start isEmpty. Operand 9693 states and 43535 transitions. [2021-06-05 22:38:03,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:38:03,012 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:03,012 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:03,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable586 [2021-06-05 22:38:03,213 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:03,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:03,213 INFO L82 PathProgramCache]: Analyzing trace with hash -375717864, now seen corresponding path program 66 times [2021-06-05 22:38:03,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:03,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772096596] [2021-06-05 22:38:03,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:03,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:03,351 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:03,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:03,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772096596] [2021-06-05 22:38:03,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772096596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:03,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311392409] [2021-06-05 22:38:03,351 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:03,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:38:03,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:03,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:38:03,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:03,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:38:03,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:38:03,503 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:03,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 22:38:03,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:03,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:03,522 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:03,522 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:50 [2021-06-05 22:38:03,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:03,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311392409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:03,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:03,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 22:38:03,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22261311] [2021-06-05 22:38:03,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:38:03,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:03,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:38:03,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:38:03,706 INFO L87 Difference]: Start difference. First operand 9693 states and 43535 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:07,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:07,247 INFO L93 Difference]: Finished difference Result 12363 states and 54001 transitions. [2021-06-05 22:38:07,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 22:38:07,247 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:38:07,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:07,275 INFO L225 Difference]: With dead ends: 12363 [2021-06-05 22:38:07,276 INFO L226 Difference]: Without dead ends: 12080 [2021-06-05 22:38:07,276 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2130 ImplicationChecksByTransitivity, 2611.3ms TimeCoverageRelationStatistics Valid=1061, Invalid=5581, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 22:38:07,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12080 states. [2021-06-05 22:38:07,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12080 to 9702. [2021-06-05 22:38:07,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9702 states, 9701 states have (on average 4.491083393464591) internal successors, (43568), 9701 states have internal predecessors, (43568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:07,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9702 states to 9702 states and 43568 transitions. [2021-06-05 22:38:07,492 INFO L78 Accepts]: Start accepts. Automaton has 9702 states and 43568 transitions. Word has length 30 [2021-06-05 22:38:07,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:07,492 INFO L482 AbstractCegarLoop]: Abstraction has 9702 states and 43568 transitions. [2021-06-05 22:38:07,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:07,492 INFO L276 IsEmpty]: Start isEmpty. Operand 9702 states and 43568 transitions. [2021-06-05 22:38:07,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:38:07,509 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:07,509 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:07,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable587 [2021-06-05 22:38:07,710 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:07,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:07,710 INFO L82 PathProgramCache]: Analyzing trace with hash -2135008526, now seen corresponding path program 67 times [2021-06-05 22:38:07,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:07,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784391975] [2021-06-05 22:38:07,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:07,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:07,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:07,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:07,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784391975] [2021-06-05 22:38:07,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784391975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:07,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404477848] [2021-06-05 22:38:07,862 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:07,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:07,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:38:07,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:07,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:38:08,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:08,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:08,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:08,004 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 22:38:08,073 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:08,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404477848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:08,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:08,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:38:08,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214695146] [2021-06-05 22:38:08,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:38:08,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:08,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:38:08,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:38:08,074 INFO L87 Difference]: Start difference. First operand 9702 states and 43568 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:10,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:10,881 INFO L93 Difference]: Finished difference Result 14077 states and 60868 transitions. [2021-06-05 22:38:10,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 22:38:10,881 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:38:10,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:10,915 INFO L225 Difference]: With dead ends: 14077 [2021-06-05 22:38:10,915 INFO L226 Difference]: Without dead ends: 13969 [2021-06-05 22:38:10,916 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2522 ImplicationChecksByTransitivity, 2042.5ms TimeCoverageRelationStatistics Valid=1140, Invalid=6000, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 22:38:10,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13969 states. [2021-06-05 22:38:11,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13969 to 9726. [2021-06-05 22:38:11,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9726 states, 9725 states have (on average 4.4917223650385605) internal successors, (43682), 9725 states have internal predecessors, (43682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:11,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9726 states to 9726 states and 43682 transitions. [2021-06-05 22:38:11,152 INFO L78 Accepts]: Start accepts. Automaton has 9726 states and 43682 transitions. Word has length 30 [2021-06-05 22:38:11,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:11,152 INFO L482 AbstractCegarLoop]: Abstraction has 9726 states and 43682 transitions. [2021-06-05 22:38:11,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:11,153 INFO L276 IsEmpty]: Start isEmpty. Operand 9726 states and 43682 transitions. [2021-06-05 22:38:11,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:38:11,169 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:11,169 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:11,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:11,370 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:11,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:11,370 INFO L82 PathProgramCache]: Analyzing trace with hash -587718528, now seen corresponding path program 62 times [2021-06-05 22:38:11,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:11,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71217571] [2021-06-05 22:38:11,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:11,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:11,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:11,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:11,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71217571] [2021-06-05 22:38:11,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71217571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:11,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690005520] [2021-06-05 22:38:11,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:11,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:38:11,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:11,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:38:11,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:11,643 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:11,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 22:38:11,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:11,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:11,656 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:11,656 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 22:38:11,770 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:11,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690005520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:11,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:11,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 22:38:11,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183111006] [2021-06-05 22:38:11,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:38:11,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:11,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:38:11,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:38:11,771 INFO L87 Difference]: Start difference. First operand 9726 states and 43682 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:14,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:14,234 INFO L93 Difference]: Finished difference Result 12036 states and 52829 transitions. [2021-06-05 22:38:14,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 22:38:14,235 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:38:14,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:14,262 INFO L225 Difference]: With dead ends: 12036 [2021-06-05 22:38:14,262 INFO L226 Difference]: Without dead ends: 11923 [2021-06-05 22:38:14,263 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1067 ImplicationChecksByTransitivity, 1775.4ms TimeCoverageRelationStatistics Valid=512, Invalid=3028, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 22:38:14,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11923 states. [2021-06-05 22:38:14,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11923 to 9747. [2021-06-05 22:38:14,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9747 states, 9746 states have (on average 4.4923045351939255) internal successors, (43782), 9746 states have internal predecessors, (43782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:14,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9747 states to 9747 states and 43782 transitions. [2021-06-05 22:38:14,453 INFO L78 Accepts]: Start accepts. Automaton has 9747 states and 43782 transitions. Word has length 30 [2021-06-05 22:38:14,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:14,453 INFO L482 AbstractCegarLoop]: Abstraction has 9747 states and 43782 transitions. [2021-06-05 22:38:14,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:14,453 INFO L276 IsEmpty]: Start isEmpty. Operand 9747 states and 43782 transitions. [2021-06-05 22:38:14,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:38:14,469 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:14,469 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:14,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable593,285 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:14,669 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:14,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:14,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1247335186, now seen corresponding path program 63 times [2021-06-05 22:38:14,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:14,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070370715] [2021-06-05 22:38:14,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:14,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:14,794 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:14,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:14,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070370715] [2021-06-05 22:38:14,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070370715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:14,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690838554] [2021-06-05 22:38:14,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:14,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:38:14,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:14,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:38:14,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:14,942 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:14,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 22:38:14,943 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:14,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:14,955 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:14,955 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 22:38:15,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:15,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690838554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:15,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:15,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:38:15,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098264737] [2021-06-05 22:38:15,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:38:15,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:15,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:38:15,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:38:15,086 INFO L87 Difference]: Start difference. First operand 9747 states and 43782 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:17,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:17,892 INFO L93 Difference]: Finished difference Result 12101 states and 53154 transitions. [2021-06-05 22:38:17,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 22:38:17,892 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:38:17,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:17,920 INFO L225 Difference]: With dead ends: 12101 [2021-06-05 22:38:17,920 INFO L226 Difference]: Without dead ends: 11937 [2021-06-05 22:38:17,920 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1285 ImplicationChecksByTransitivity, 1961.0ms TimeCoverageRelationStatistics Valid=635, Invalid=3525, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 22:38:17,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11937 states. [2021-06-05 22:38:18,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11937 to 9741. [2021-06-05 22:38:18,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9741 states, 9740 states have (on average 4.492607802874743) internal successors, (43758), 9740 states have internal predecessors, (43758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:18,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9741 states to 9741 states and 43758 transitions. [2021-06-05 22:38:18,134 INFO L78 Accepts]: Start accepts. Automaton has 9741 states and 43758 transitions. Word has length 30 [2021-06-05 22:38:18,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:18,134 INFO L482 AbstractCegarLoop]: Abstraction has 9741 states and 43758 transitions. [2021-06-05 22:38:18,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:18,134 INFO L276 IsEmpty]: Start isEmpty. Operand 9741 states and 43758 transitions. [2021-06-05 22:38:18,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:38:18,151 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:18,151 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:18,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable595 [2021-06-05 22:38:18,351 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:18,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:18,351 INFO L82 PathProgramCache]: Analyzing trace with hash -759920676, now seen corresponding path program 64 times [2021-06-05 22:38:18,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:18,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084868428] [2021-06-05 22:38:18,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:18,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:18,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:18,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:18,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084868428] [2021-06-05 22:38:18,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084868428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:18,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192773727] [2021-06-05 22:38:18,471 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:18,506 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:38:18,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:18,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:38:18,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:18,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:38:18,611 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:18,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:18,616 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:18,616 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 22:38:18,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:18,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192773727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:18,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:18,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 22:38:18,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358250020] [2021-06-05 22:38:18,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:38:18,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:18,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:38:18,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:38:18,669 INFO L87 Difference]: Start difference. First operand 9741 states and 43758 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:20,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:20,528 INFO L93 Difference]: Finished difference Result 12048 states and 52970 transitions. [2021-06-05 22:38:20,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 22:38:20,528 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:38:20,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:20,555 INFO L225 Difference]: With dead ends: 12048 [2021-06-05 22:38:20,556 INFO L226 Difference]: Without dead ends: 11939 [2021-06-05 22:38:20,556 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 1239.2ms TimeCoverageRelationStatistics Valid=468, Invalid=2394, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 22:38:20,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11939 states. [2021-06-05 22:38:20,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11939 to 9735. [2021-06-05 22:38:20,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9735 states, 9734 states have (on average 4.4917813848366555) internal successors, (43723), 9734 states have internal predecessors, (43723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:20,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9735 states to 9735 states and 43723 transitions. [2021-06-05 22:38:20,769 INFO L78 Accepts]: Start accepts. Automaton has 9735 states and 43723 transitions. Word has length 30 [2021-06-05 22:38:20,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:20,769 INFO L482 AbstractCegarLoop]: Abstraction has 9735 states and 43723 transitions. [2021-06-05 22:38:20,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:20,769 INFO L276 IsEmpty]: Start isEmpty. Operand 9735 states and 43723 transitions. [2021-06-05 22:38:20,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:38:20,786 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:20,786 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:20,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 287 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-06-05 22:38:20,987 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:20,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:20,987 INFO L82 PathProgramCache]: Analyzing trace with hash 708845798, now seen corresponding path program 65 times [2021-06-05 22:38:20,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:20,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440718239] [2021-06-05 22:38:20,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:20,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:21,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:21,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:21,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440718239] [2021-06-05 22:38:21,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440718239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:21,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738449752] [2021-06-05 22:38:21,113 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:21,148 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:38:21,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:21,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:38:21,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:21,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:38:21,256 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:21,259 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:21,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:21,260 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 22:38:21,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:21,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738449752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:21,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:21,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:38:21,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375416316] [2021-06-05 22:38:21,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:38:21,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:21,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:38:21,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:38:21,329 INFO L87 Difference]: Start difference. First operand 9735 states and 43723 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:23,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:23,310 INFO L93 Difference]: Finished difference Result 12077 states and 53024 transitions. [2021-06-05 22:38:23,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 22:38:23,310 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:38:23,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:23,338 INFO L225 Difference]: With dead ends: 12077 [2021-06-05 22:38:23,338 INFO L226 Difference]: Without dead ends: 11988 [2021-06-05 22:38:23,338 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 977 ImplicationChecksByTransitivity, 1386.9ms TimeCoverageRelationStatistics Valid=505, Invalid=2687, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 22:38:23,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11988 states. [2021-06-05 22:38:23,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11988 to 9749. [2021-06-05 22:38:23,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9749 states, 9748 states have (on average 4.493126795240049) internal successors, (43799), 9748 states have internal predecessors, (43799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:23,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9749 states to 9749 states and 43799 transitions. [2021-06-05 22:38:23,555 INFO L78 Accepts]: Start accepts. Automaton has 9749 states and 43799 transitions. Word has length 30 [2021-06-05 22:38:23,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:23,556 INFO L482 AbstractCegarLoop]: Abstraction has 9749 states and 43799 transitions. [2021-06-05 22:38:23,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:23,556 INFO L276 IsEmpty]: Start isEmpty. Operand 9749 states and 43799 transitions. [2021-06-05 22:38:23,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:38:23,572 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:23,573 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:23,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable599 [2021-06-05 22:38:23,773 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:23,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:23,773 INFO L82 PathProgramCache]: Analyzing trace with hash 456788344, now seen corresponding path program 66 times [2021-06-05 22:38:23,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:23,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454560471] [2021-06-05 22:38:23,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:23,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:23,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:23,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:23,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454560471] [2021-06-05 22:38:23,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454560471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:23,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285724788] [2021-06-05 22:38:23,896 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:23,931 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:38:23,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:23,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:38:23,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:24,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:38:24,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:38:24,134 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:24,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 22:38:24,136 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:24,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:24,155 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:24,155 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:53 [2021-06-05 22:38:24,357 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:24,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285724788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:24,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:24,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 22:38:24,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916444265] [2021-06-05 22:38:24,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:38:24,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:24,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:38:24,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:38:24,358 INFO L87 Difference]: Start difference. First operand 9749 states and 43799 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:26,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:26,894 INFO L93 Difference]: Finished difference Result 11130 states and 49227 transitions. [2021-06-05 22:38:26,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 22:38:26,895 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:38:26,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:26,920 INFO L225 Difference]: With dead ends: 11130 [2021-06-05 22:38:26,921 INFO L226 Difference]: Without dead ends: 10970 [2021-06-05 22:38:26,921 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 1884.9ms TimeCoverageRelationStatistics Valid=489, Invalid=3543, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 22:38:26,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10970 states. [2021-06-05 22:38:27,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10970 to 9747. [2021-06-05 22:38:27,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9747 states, 9746 states have (on average 4.492920172378412) internal successors, (43788), 9746 states have internal predecessors, (43788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:27,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9747 states to 9747 states and 43788 transitions. [2021-06-05 22:38:27,123 INFO L78 Accepts]: Start accepts. Automaton has 9747 states and 43788 transitions. Word has length 30 [2021-06-05 22:38:27,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:27,124 INFO L482 AbstractCegarLoop]: Abstraction has 9747 states and 43788 transitions. [2021-06-05 22:38:27,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:27,124 INFO L276 IsEmpty]: Start isEmpty. Operand 9747 states and 43788 transitions. [2021-06-05 22:38:27,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:38:27,141 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:27,141 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:27,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable600,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:27,341 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:27,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:27,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1957586502, now seen corresponding path program 67 times [2021-06-05 22:38:27,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:27,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086582783] [2021-06-05 22:38:27,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:27,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:27,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:27,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:27,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086582783] [2021-06-05 22:38:27,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086582783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:27,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315769506] [2021-06-05 22:38:27,471 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:27,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:27,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:38:27,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:27,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 22:38:27,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:27,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:27,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:27,620 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 22:38:27,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:27,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315769506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:27,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:27,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 22:38:27,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746027769] [2021-06-05 22:38:27,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:38:27,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:27,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:38:27,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:38:27,693 INFO L87 Difference]: Start difference. First operand 9747 states and 43788 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:30,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:30,056 INFO L93 Difference]: Finished difference Result 12893 states and 56018 transitions. [2021-06-05 22:38:30,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 22:38:30,056 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:38:30,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:30,087 INFO L225 Difference]: With dead ends: 12893 [2021-06-05 22:38:30,087 INFO L226 Difference]: Without dead ends: 12796 [2021-06-05 22:38:30,087 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1744 ImplicationChecksByTransitivity, 1699.4ms TimeCoverageRelationStatistics Valid=862, Invalid=4394, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 22:38:30,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12796 states. [2021-06-05 22:38:30,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12796 to 9748. [2021-06-05 22:38:30,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9748 states, 9747 states have (on average 4.49317738791423) internal successors, (43795), 9747 states have internal predecessors, (43795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:30,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9748 states to 9748 states and 43795 transitions. [2021-06-05 22:38:30,314 INFO L78 Accepts]: Start accepts. Automaton has 9748 states and 43795 transitions. Word has length 30 [2021-06-05 22:38:30,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:30,315 INFO L482 AbstractCegarLoop]: Abstraction has 9748 states and 43795 transitions. [2021-06-05 22:38:30,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:30,315 INFO L276 IsEmpty]: Start isEmpty. Operand 9748 states and 43795 transitions. [2021-06-05 22:38:30,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:38:30,331 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:30,332 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:30,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable604 [2021-06-05 22:38:30,532 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:30,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:30,532 INFO L82 PathProgramCache]: Analyzing trace with hash -95445832, now seen corresponding path program 68 times [2021-06-05 22:38:30,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:30,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544563735] [2021-06-05 22:38:30,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:30,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:30,658 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:30,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:30,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544563735] [2021-06-05 22:38:30,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544563735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:30,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673289945] [2021-06-05 22:38:30,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:30,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:38:30,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:30,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:38:30,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:30,809 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:30,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 22:38:30,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:30,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:30,822 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:30,822 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 22:38:30,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:30,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673289945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:30,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:30,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:38:30,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611224532] [2021-06-05 22:38:30,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:38:30,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:30,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:38:30,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:38:30,921 INFO L87 Difference]: Start difference. First operand 9748 states and 43795 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:34,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:34,586 INFO L93 Difference]: Finished difference Result 13765 states and 59658 transitions. [2021-06-05 22:38:34,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 22:38:34,586 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:38:34,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:34,621 INFO L225 Difference]: With dead ends: 13765 [2021-06-05 22:38:34,621 INFO L226 Difference]: Without dead ends: 13599 [2021-06-05 22:38:34,622 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2559 ImplicationChecksByTransitivity, 2556.4ms TimeCoverageRelationStatistics Valid=1127, Invalid=6355, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 22:38:34,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13599 states. [2021-06-05 22:38:34,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13599 to 9762. [2021-06-05 22:38:34,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9762 states, 9761 states have (on average 4.493187173445344) internal successors, (43858), 9761 states have internal predecessors, (43858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:34,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9762 states to 9762 states and 43858 transitions. [2021-06-05 22:38:34,867 INFO L78 Accepts]: Start accepts. Automaton has 9762 states and 43858 transitions. Word has length 30 [2021-06-05 22:38:34,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:34,867 INFO L482 AbstractCegarLoop]: Abstraction has 9762 states and 43858 transitions. [2021-06-05 22:38:34,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:34,868 INFO L276 IsEmpty]: Start isEmpty. Operand 9762 states and 43858 transitions. [2021-06-05 22:38:34,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:38:34,885 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:34,885 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:35,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable605,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:35,085 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:35,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:35,085 INFO L82 PathProgramCache]: Analyzing trace with hash -731912686, now seen corresponding path program 69 times [2021-06-05 22:38:35,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:35,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130167385] [2021-06-05 22:38:35,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:35,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:35,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:35,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:35,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130167385] [2021-06-05 22:38:35,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130167385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:35,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092170096] [2021-06-05 22:38:35,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:35,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:38:35,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:35,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:38:35,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:35,360 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:35,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 22:38:35,362 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:35,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:35,378 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:35,378 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 22:38:35,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:35,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092170096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:35,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:35,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 22:38:35,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699778028] [2021-06-05 22:38:35,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:38:35,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:35,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:38:35,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:38:35,480 INFO L87 Difference]: Start difference. First operand 9762 states and 43858 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:38,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:38,531 INFO L93 Difference]: Finished difference Result 13721 states and 59321 transitions. [2021-06-05 22:38:38,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 22:38:38,532 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:38:38,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:38,565 INFO L225 Difference]: With dead ends: 13721 [2021-06-05 22:38:38,565 INFO L226 Difference]: Without dead ends: 13640 [2021-06-05 22:38:38,565 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2401 ImplicationChecksByTransitivity, 2136.0ms TimeCoverageRelationStatistics Valid=1089, Invalid=5883, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 22:38:38,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13640 states. [2021-06-05 22:38:38,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13640 to 9745. [2021-06-05 22:38:38,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9745 states, 9744 states have (on average 4.493123973727422) internal successors, (43781), 9744 states have internal predecessors, (43781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:38,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9745 states to 9745 states and 43781 transitions. [2021-06-05 22:38:38,806 INFO L78 Accepts]: Start accepts. Automaton has 9745 states and 43781 transitions. Word has length 30 [2021-06-05 22:38:38,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:38,806 INFO L482 AbstractCegarLoop]: Abstraction has 9745 states and 43781 transitions. [2021-06-05 22:38:38,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:38,806 INFO L276 IsEmpty]: Start isEmpty. Operand 9745 states and 43781 transitions. [2021-06-05 22:38:38,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:38:38,823 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:38,823 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:39,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable608,292 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:39,024 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:39,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:39,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1293295150, now seen corresponding path program 28 times [2021-06-05 22:38:39,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:39,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954746703] [2021-06-05 22:38:39,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:39,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:39,210 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:39,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:39,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954746703] [2021-06-05 22:38:39,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954746703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:39,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128624647] [2021-06-05 22:38:39,210 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:39,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:38:39,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:39,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:38:39,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:39,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:38:39,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:38:39,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:38:39,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-06-05 22:38:39,407 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:39,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:39,413 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:39,413 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:11 [2021-06-05 22:38:39,440 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:39,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128624647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:39,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:39,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 22:38:39,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018328568] [2021-06-05 22:38:39,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:38:39,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:39,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:38:39,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:38:39,441 INFO L87 Difference]: Start difference. First operand 9745 states and 43781 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:41,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:41,129 INFO L93 Difference]: Finished difference Result 12248 states and 52916 transitions. [2021-06-05 22:38:41,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 22:38:41,130 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:38:41,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:41,157 INFO L225 Difference]: With dead ends: 12248 [2021-06-05 22:38:41,157 INFO L226 Difference]: Without dead ends: 12131 [2021-06-05 22:38:41,158 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 894.9ms TimeCoverageRelationStatistics Valid=239, Invalid=1483, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 22:38:41,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12131 states. [2021-06-05 22:38:41,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12131 to 9792. [2021-06-05 22:38:41,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9792 states, 9791 states have (on average 4.493922990501481) internal successors, (44000), 9791 states have internal predecessors, (44000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:41,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9792 states to 9792 states and 44000 transitions. [2021-06-05 22:38:41,372 INFO L78 Accepts]: Start accepts. Automaton has 9792 states and 44000 transitions. Word has length 30 [2021-06-05 22:38:41,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:41,373 INFO L482 AbstractCegarLoop]: Abstraction has 9792 states and 44000 transitions. [2021-06-05 22:38:41,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:41,373 INFO L276 IsEmpty]: Start isEmpty. Operand 9792 states and 44000 transitions. [2021-06-05 22:38:41,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:38:41,391 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:41,391 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:41,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable611,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:41,591 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:41,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:41,591 INFO L82 PathProgramCache]: Analyzing trace with hash -2003594308, now seen corresponding path program 5 times [2021-06-05 22:38:41,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:41,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058784884] [2021-06-05 22:38:41,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:41,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:41,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:41,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:41,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058784884] [2021-06-05 22:38:41,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058784884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:41,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488016204] [2021-06-05 22:38:41,713 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:41,748 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:38:41,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:41,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:38:41,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:41,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:38:41,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:38:41,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:38:41,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-06-05 22:38:41,910 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:41,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:41,916 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:41,916 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:11 [2021-06-05 22:38:41,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:41,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488016204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:41,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:41,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 22:38:41,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118931032] [2021-06-05 22:38:41,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:38:41,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:41,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:38:41,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:38:41,943 INFO L87 Difference]: Start difference. First operand 9792 states and 44000 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:42,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:42,587 INFO L93 Difference]: Finished difference Result 10594 states and 47151 transitions. [2021-06-05 22:38:42,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:38:42,588 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:38:42,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:42,612 INFO L225 Difference]: With dead ends: 10594 [2021-06-05 22:38:42,612 INFO L226 Difference]: Without dead ends: 10388 [2021-06-05 22:38:42,612 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 336.6ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:38:42,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10388 states. [2021-06-05 22:38:42,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10388 to 9816. [2021-06-05 22:38:42,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9816 states, 9815 states have (on average 4.491594498217014) internal successors, (44085), 9815 states have internal predecessors, (44085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:42,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9816 states to 9816 states and 44085 transitions. [2021-06-05 22:38:42,811 INFO L78 Accepts]: Start accepts. Automaton has 9816 states and 44085 transitions. Word has length 30 [2021-06-05 22:38:42,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:42,811 INFO L482 AbstractCegarLoop]: Abstraction has 9816 states and 44085 transitions. [2021-06-05 22:38:42,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:42,811 INFO L276 IsEmpty]: Start isEmpty. Operand 9816 states and 44085 transitions. [2021-06-05 22:38:42,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:38:42,828 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:42,828 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:43,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable612 [2021-06-05 22:38:43,028 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:43,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:43,028 INFO L82 PathProgramCache]: Analyzing trace with hash 2026530574, now seen corresponding path program 29 times [2021-06-05 22:38:43,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:43,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768153309] [2021-06-05 22:38:43,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:43,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:43,204 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:43,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:43,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768153309] [2021-06-05 22:38:43,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768153309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:43,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934678395] [2021-06-05 22:38:43,204 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:43,240 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 22:38:43,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:43,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:38:43,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:43,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:38:43,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:38:43,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:38:43,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 22:38:43,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:43,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:43,388 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:43,388 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 22:38:43,435 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:43,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934678395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:43,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:43,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 22:38:43,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672538539] [2021-06-05 22:38:43,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:38:43,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:43,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:38:43,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:38:43,436 INFO L87 Difference]: Start difference. First operand 9816 states and 44085 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:44,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:44,658 INFO L93 Difference]: Finished difference Result 11346 states and 49863 transitions. [2021-06-05 22:38:44,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:38:44,658 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:38:44,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:44,686 INFO L225 Difference]: With dead ends: 11346 [2021-06-05 22:38:44,686 INFO L226 Difference]: Without dead ends: 11186 [2021-06-05 22:38:44,686 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 871.4ms TimeCoverageRelationStatistics Valid=265, Invalid=1295, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:38:44,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11186 states. [2021-06-05 22:38:44,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11186 to 9875. [2021-06-05 22:38:44,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9875 states, 9874 states have (on average 4.494936196070488) internal successors, (44383), 9874 states have internal predecessors, (44383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:44,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9875 states to 9875 states and 44383 transitions. [2021-06-05 22:38:44,895 INFO L78 Accepts]: Start accepts. Automaton has 9875 states and 44383 transitions. Word has length 30 [2021-06-05 22:38:44,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:44,896 INFO L482 AbstractCegarLoop]: Abstraction has 9875 states and 44383 transitions. [2021-06-05 22:38:44,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:44,896 INFO L276 IsEmpty]: Start isEmpty. Operand 9875 states and 44383 transitions. [2021-06-05 22:38:44,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:38:44,913 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:44,913 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:45,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable613,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:45,114 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:45,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:45,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1713004178, now seen corresponding path program 30 times [2021-06-05 22:38:45,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:45,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136787721] [2021-06-05 22:38:45,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:45,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:45,291 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:45,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:45,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136787721] [2021-06-05 22:38:45,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136787721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:45,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768666722] [2021-06-05 22:38:45,291 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:45,327 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:38:45,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:45,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:38:45,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:45,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:38:45,488 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:45,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-06-05 22:38:45,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:45,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:45,511 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:45,512 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:40 [2021-06-05 22:38:45,672 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:45,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768666722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:45,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:45,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 22:38:45,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159641666] [2021-06-05 22:38:45,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:38:45,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:45,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:38:45,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:38:45,673 INFO L87 Difference]: Start difference. First operand 9875 states and 44383 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:48,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:48,438 INFO L93 Difference]: Finished difference Result 11024 states and 48734 transitions. [2021-06-05 22:38:48,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 22:38:48,438 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:38:48,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:48,463 INFO L225 Difference]: With dead ends: 11024 [2021-06-05 22:38:48,463 INFO L226 Difference]: Without dead ends: 10736 [2021-06-05 22:38:48,464 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 2139.4ms TimeCoverageRelationStatistics Valid=548, Invalid=3112, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 22:38:48,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10736 states. [2021-06-05 22:38:48,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10736 to 9882. [2021-06-05 22:38:48,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9882 states, 9881 states have (on average 4.491650642647505) internal successors, (44382), 9881 states have internal predecessors, (44382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:48,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9882 states to 9882 states and 44382 transitions. [2021-06-05 22:38:48,661 INFO L78 Accepts]: Start accepts. Automaton has 9882 states and 44382 transitions. Word has length 30 [2021-06-05 22:38:48,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:48,661 INFO L482 AbstractCegarLoop]: Abstraction has 9882 states and 44382 transitions. [2021-06-05 22:38:48,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:48,661 INFO L276 IsEmpty]: Start isEmpty. Operand 9882 states and 44382 transitions. [2021-06-05 22:38:48,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:38:48,678 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:48,678 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:48,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable614,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:48,878 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:48,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:48,879 INFO L82 PathProgramCache]: Analyzing trace with hash 853505080, now seen corresponding path program 6 times [2021-06-05 22:38:48,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:48,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978960542] [2021-06-05 22:38:48,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:48,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:48,996 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:48,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:48,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978960542] [2021-06-05 22:38:48,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978960542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:48,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469842175] [2021-06-05 22:38:48,997 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:49,033 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:38:49,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:49,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:38:49,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:49,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:38:49,213 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:49,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 60 [2021-06-05 22:38:49,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:49,281 INFO L628 ElimStorePlain]: treesize reduction 5, result has 94.2 percent of original size [2021-06-05 22:38:49,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:49,337 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:881 [2021-06-05 22:38:49,672 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2021-06-05 22:38:50,010 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 53 [2021-06-05 22:38:50,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:50,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469842175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:50,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:50,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 20 [2021-06-05 22:38:50,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409746747] [2021-06-05 22:38:50,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:38:50,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:50,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:38:50,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:38:50,123 INFO L87 Difference]: Start difference. First operand 9882 states and 44382 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:50,585 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 63 [2021-06-05 22:38:52,277 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2021-06-05 22:38:52,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:52,755 INFO L93 Difference]: Finished difference Result 11124 states and 49561 transitions. [2021-06-05 22:38:52,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 22:38:52,756 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:38:52,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:52,781 INFO L225 Difference]: With dead ends: 11124 [2021-06-05 22:38:52,781 INFO L226 Difference]: Without dead ends: 10877 [2021-06-05 22:38:52,781 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 2142.4ms TimeCoverageRelationStatistics Valid=154, Invalid=1406, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 22:38:52,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10877 states. [2021-06-05 22:38:52,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10877 to 9948. [2021-06-05 22:38:52,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9948 states, 9947 states have (on average 4.4993465366442145) internal successors, (44755), 9947 states have internal predecessors, (44755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:52,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9948 states to 9948 states and 44755 transitions. [2021-06-05 22:38:52,988 INFO L78 Accepts]: Start accepts. Automaton has 9948 states and 44755 transitions. Word has length 30 [2021-06-05 22:38:52,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:52,988 INFO L482 AbstractCegarLoop]: Abstraction has 9948 states and 44755 transitions. [2021-06-05 22:38:52,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:52,988 INFO L276 IsEmpty]: Start isEmpty. Operand 9948 states and 44755 transitions. [2021-06-05 22:38:53,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:38:53,005 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:53,005 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:53,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable619 [2021-06-05 22:38:53,206 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:53,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:53,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1927988576, now seen corresponding path program 68 times [2021-06-05 22:38:53,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:53,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322021847] [2021-06-05 22:38:53,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:53,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:53,409 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:53,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:53,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322021847] [2021-06-05 22:38:53,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322021847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:53,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052668659] [2021-06-05 22:38:53,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:53,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:38:53,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:53,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:38:53,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:53,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:38:53,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:38:53,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:38:53,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 22:38:53,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:53,703 INFO L628 ElimStorePlain]: treesize reduction 3, result has 88.0 percent of original size [2021-06-05 22:38:53,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:53,704 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:11 [2021-06-05 22:38:53,744 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:53,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052668659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:53,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:53,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 22:38:53,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534667866] [2021-06-05 22:38:53,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:38:53,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:53,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:38:53,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:38:53,745 INFO L87 Difference]: Start difference. First operand 9948 states and 44755 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:54,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:54,954 INFO L93 Difference]: Finished difference Result 10495 states and 46820 transitions. [2021-06-05 22:38:54,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:38:54,954 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:38:54,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:54,979 INFO L225 Difference]: With dead ends: 10495 [2021-06-05 22:38:54,979 INFO L226 Difference]: Without dead ends: 10355 [2021-06-05 22:38:54,979 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 763.8ms TimeCoverageRelationStatistics Valid=220, Invalid=1186, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:38:54,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10355 states. [2021-06-05 22:38:55,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10355 to 9953. [2021-06-05 22:38:55,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9953 states, 9952 states have (on average 4.498593247588424) internal successors, (44770), 9952 states have internal predecessors, (44770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:55,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9953 states to 9953 states and 44770 transitions. [2021-06-05 22:38:55,180 INFO L78 Accepts]: Start accepts. Automaton has 9953 states and 44770 transitions. Word has length 30 [2021-06-05 22:38:55,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:55,180 INFO L482 AbstractCegarLoop]: Abstraction has 9953 states and 44770 transitions. [2021-06-05 22:38:55,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:55,180 INFO L276 IsEmpty]: Start isEmpty. Operand 9953 states and 44770 transitions. [2021-06-05 22:38:55,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:38:55,198 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:55,198 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:55,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable639 [2021-06-05 22:38:55,398 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:55,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:55,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1662609756, now seen corresponding path program 69 times [2021-06-05 22:38:55,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:55,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862799518] [2021-06-05 22:38:55,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:55,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:55,628 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:55,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:55,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862799518] [2021-06-05 22:38:55,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862799518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:55,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051720479] [2021-06-05 22:38:55,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:55,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:38:55,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:55,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:38:55,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:55,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:38:55,925 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:55,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-06-05 22:38:55,927 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:55,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:55,942 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:55,943 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:66 [2021-06-05 22:38:56,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:56,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051720479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:56,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:56,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 22:38:56,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948394715] [2021-06-05 22:38:56,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:38:56,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:56,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:38:56,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:38:56,136 INFO L87 Difference]: Start difference. First operand 9953 states and 44770 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:58,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:38:58,315 INFO L93 Difference]: Finished difference Result 10524 states and 46882 transitions. [2021-06-05 22:38:58,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 22:38:58,315 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:38:58,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:38:58,340 INFO L225 Difference]: With dead ends: 10524 [2021-06-05 22:38:58,340 INFO L226 Difference]: Without dead ends: 10361 [2021-06-05 22:38:58,340 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1662.9ms TimeCoverageRelationStatistics Valid=313, Invalid=1943, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 22:38:58,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10361 states. [2021-06-05 22:38:58,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10361 to 9962. [2021-06-05 22:38:58,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9962 states, 9961 states have (on average 4.498443931332195) internal successors, (44809), 9961 states have internal predecessors, (44809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:58,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9962 states to 9962 states and 44809 transitions. [2021-06-05 22:38:58,542 INFO L78 Accepts]: Start accepts. Automaton has 9962 states and 44809 transitions. Word has length 30 [2021-06-05 22:38:58,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:38:58,542 INFO L482 AbstractCegarLoop]: Abstraction has 9962 states and 44809 transitions. [2021-06-05 22:38:58,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:38:58,543 INFO L276 IsEmpty]: Start isEmpty. Operand 9962 states and 44809 transitions. [2021-06-05 22:38:58,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:38:58,561 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:38:58,562 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:38:58,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable640,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:58,762 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:38:58,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:38:58,762 INFO L82 PathProgramCache]: Analyzing trace with hash 2099600558, now seen corresponding path program 70 times [2021-06-05 22:38:58,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:38:58,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897922531] [2021-06-05 22:38:58,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:38:58,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:38:58,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:58,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:38:58,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897922531] [2021-06-05 22:38:58,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897922531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:58,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274974450] [2021-06-05 22:38:58,984 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:38:59,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:38:59,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:38:59,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:38:59,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:38:59,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:38:59,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:38:59,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:38:59,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 22:38:59,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:38:59,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:38:59,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:38:59,179 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 22:38:59,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:38:59,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274974450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:38:59,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:38:59,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 20 [2021-06-05 22:38:59,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501994083] [2021-06-05 22:38:59,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:38:59,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:38:59,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:38:59,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:38:59,209 INFO L87 Difference]: Start difference. First operand 9962 states and 44809 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:00,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:00,269 INFO L93 Difference]: Finished difference Result 10461 states and 46718 transitions. [2021-06-05 22:39:00,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:39:00,269 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:39:00,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:00,293 INFO L225 Difference]: With dead ends: 10461 [2021-06-05 22:39:00,293 INFO L226 Difference]: Without dead ends: 10349 [2021-06-05 22:39:00,293 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 751.3ms TimeCoverageRelationStatistics Valid=210, Invalid=980, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:39:00,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10349 states. [2021-06-05 22:39:00,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10349 to 9968. [2021-06-05 22:39:00,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9968 states, 9967 states have (on average 4.498043543694191) internal successors, (44832), 9967 states have internal predecessors, (44832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:00,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9968 states to 9968 states and 44832 transitions. [2021-06-05 22:39:00,496 INFO L78 Accepts]: Start accepts. Automaton has 9968 states and 44832 transitions. Word has length 30 [2021-06-05 22:39:00,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:00,496 INFO L482 AbstractCegarLoop]: Abstraction has 9968 states and 44832 transitions. [2021-06-05 22:39:00,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:00,496 INFO L276 IsEmpty]: Start isEmpty. Operand 9968 states and 44832 transitions. [2021-06-05 22:39:00,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:39:00,514 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:00,514 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:00,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable645 [2021-06-05 22:39:00,714 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:00,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:00,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1581275744, now seen corresponding path program 7 times [2021-06-05 22:39:00,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:00,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414419401] [2021-06-05 22:39:00,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:00,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:00,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:00,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:00,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414419401] [2021-06-05 22:39:00,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414419401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:00,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626180869] [2021-06-05 22:39:00,836 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:00,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:00,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:39:00,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:01,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:39:01,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:39:01,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:39:01,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 22:39:01,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:01,018 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:01,019 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:01,019 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 22:39:01,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:01,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626180869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:01,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:01,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-06-05 22:39:01,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802992715] [2021-06-05 22:39:01,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 22:39:01,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:01,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 22:39:01,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 22:39:01,049 INFO L87 Difference]: Start difference. First operand 9968 states and 44832 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:01,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:01,607 INFO L93 Difference]: Finished difference Result 10466 states and 46670 transitions. [2021-06-05 22:39:01,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:39:01,607 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:39:01,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:01,630 INFO L225 Difference]: With dead ends: 10466 [2021-06-05 22:39:01,630 INFO L226 Difference]: Without dead ends: 10265 [2021-06-05 22:39:01,630 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 279.1ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:39:01,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10265 states. [2021-06-05 22:39:01,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10265 to 9979. [2021-06-05 22:39:01,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9979 states, 9978 states have (on average 4.497694928843456) internal successors, (44878), 9978 states have internal predecessors, (44878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:01,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9979 states to 9979 states and 44878 transitions. [2021-06-05 22:39:01,829 INFO L78 Accepts]: Start accepts. Automaton has 9979 states and 44878 transitions. Word has length 30 [2021-06-05 22:39:01,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:01,829 INFO L482 AbstractCegarLoop]: Abstraction has 9979 states and 44878 transitions. [2021-06-05 22:39:01,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:01,829 INFO L276 IsEmpty]: Start isEmpty. Operand 9979 states and 44878 transitions. [2021-06-05 22:39:01,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:39:01,847 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:01,847 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:02,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable646,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:02,047 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:02,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:02,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1667325488, now seen corresponding path program 70 times [2021-06-05 22:39:02,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:02,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682539178] [2021-06-05 22:39:02,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:02,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:02,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:02,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:02,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682539178] [2021-06-05 22:39:02,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682539178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:02,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575471836] [2021-06-05 22:39:02,228 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:02,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:39:02,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:02,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:39:02,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:02,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:39:02,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:39:02,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:39:02,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 22:39:02,414 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:02,420 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:02,421 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:02,421 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 22:39:02,464 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:02,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575471836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:02,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:02,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 22:39:02,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369106034] [2021-06-05 22:39:02,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:39:02,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:02,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:39:02,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:39:02,465 INFO L87 Difference]: Start difference. First operand 9979 states and 44878 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:03,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:03,467 INFO L93 Difference]: Finished difference Result 10368 states and 46370 transitions. [2021-06-05 22:39:03,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:39:03,467 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:39:03,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:03,492 INFO L225 Difference]: With dead ends: 10368 [2021-06-05 22:39:03,492 INFO L226 Difference]: Without dead ends: 10270 [2021-06-05 22:39:03,492 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 564.1ms TimeCoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:39:03,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10270 states. [2021-06-05 22:39:03,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10270 to 9991. [2021-06-05 22:39:03,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9991 states, 9990 states have (on average 4.497097097097097) internal successors, (44926), 9990 states have internal predecessors, (44926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:03,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9991 states to 9991 states and 44926 transitions. [2021-06-05 22:39:03,690 INFO L78 Accepts]: Start accepts. Automaton has 9991 states and 44926 transitions. Word has length 30 [2021-06-05 22:39:03,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:03,690 INFO L482 AbstractCegarLoop]: Abstraction has 9991 states and 44926 transitions. [2021-06-05 22:39:03,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:03,690 INFO L276 IsEmpty]: Start isEmpty. Operand 9991 states and 44926 transitions. [2021-06-05 22:39:03,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:39:03,708 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:03,708 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:03,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable647,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:03,908 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:03,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:03,908 INFO L82 PathProgramCache]: Analyzing trace with hash -2007157742, now seen corresponding path program 71 times [2021-06-05 22:39:03,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:03,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559798565] [2021-06-05 22:39:03,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:03,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:04,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:04,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:04,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559798565] [2021-06-05 22:39:04,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559798565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:04,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23542675] [2021-06-05 22:39:04,075 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:04,111 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:39:04,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:04,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:39:04,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:04,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:39:04,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:39:04,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:39:04,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 22:39:04,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:04,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:04,273 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:04,274 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 22:39:04,310 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:04,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23542675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:04,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:04,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-06-05 22:39:04,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378700567] [2021-06-05 22:39:04,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:39:04,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:04,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:39:04,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:39:04,311 INFO L87 Difference]: Start difference. First operand 9991 states and 44926 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:05,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:05,047 INFO L93 Difference]: Finished difference Result 10340 states and 46242 transitions. [2021-06-05 22:39:05,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:39:05,047 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:39:05,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:05,072 INFO L225 Difference]: With dead ends: 10340 [2021-06-05 22:39:05,072 INFO L226 Difference]: Without dead ends: 10248 [2021-06-05 22:39:05,072 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 518.9ms TimeCoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:39:05,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10248 states. [2021-06-05 22:39:05,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10248 to 9988. [2021-06-05 22:39:05,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9988 states, 9987 states have (on average 4.49674576950035) internal successors, (44909), 9987 states have internal predecessors, (44909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:05,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9988 states to 9988 states and 44909 transitions. [2021-06-05 22:39:05,271 INFO L78 Accepts]: Start accepts. Automaton has 9988 states and 44909 transitions. Word has length 30 [2021-06-05 22:39:05,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:05,271 INFO L482 AbstractCegarLoop]: Abstraction has 9988 states and 44909 transitions. [2021-06-05 22:39:05,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:05,271 INFO L276 IsEmpty]: Start isEmpty. Operand 9988 states and 44909 transitions. [2021-06-05 22:39:05,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:39:05,289 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:05,289 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:05,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable648,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:05,490 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:05,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:05,490 INFO L82 PathProgramCache]: Analyzing trace with hash 353883056, now seen corresponding path program 72 times [2021-06-05 22:39:05,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:05,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682482375] [2021-06-05 22:39:05,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:05,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:05,680 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:05,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:05,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682482375] [2021-06-05 22:39:05,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682482375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:05,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306506931] [2021-06-05 22:39:05,680 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:05,715 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:39:05,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:05,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:39:05,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:05,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:39:05,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:39:05,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:39:05,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 22:39:05,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:05,980 INFO L628 ElimStorePlain]: treesize reduction 3, result has 88.0 percent of original size [2021-06-05 22:39:05,981 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:05,981 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:11 [2021-06-05 22:39:06,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:06,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306506931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:06,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:06,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 22:39:06,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144253349] [2021-06-05 22:39:06,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:39:06,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:06,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:39:06,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:39:06,022 INFO L87 Difference]: Start difference. First operand 9988 states and 44909 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:07,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:07,218 INFO L93 Difference]: Finished difference Result 10601 states and 47254 transitions. [2021-06-05 22:39:07,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:39:07,218 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:39:07,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:07,242 INFO L225 Difference]: With dead ends: 10601 [2021-06-05 22:39:07,242 INFO L226 Difference]: Without dead ends: 10487 [2021-06-05 22:39:07,243 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 850.9ms TimeCoverageRelationStatistics Valid=212, Invalid=1120, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:39:07,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10487 states. [2021-06-05 22:39:07,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10487 to 9987. [2021-06-05 22:39:07,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9987 states, 9986 states have (on average 4.496895653915482) internal successors, (44906), 9986 states have internal predecessors, (44906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:07,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9987 states to 9987 states and 44906 transitions. [2021-06-05 22:39:07,446 INFO L78 Accepts]: Start accepts. Automaton has 9987 states and 44906 transitions. Word has length 30 [2021-06-05 22:39:07,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:07,446 INFO L482 AbstractCegarLoop]: Abstraction has 9987 states and 44906 transitions. [2021-06-05 22:39:07,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:07,446 INFO L276 IsEmpty]: Start isEmpty. Operand 9987 states and 44906 transitions. [2021-06-05 22:39:07,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:39:07,464 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:07,464 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:07,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable649 [2021-06-05 22:39:07,664 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:07,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:07,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1932960114, now seen corresponding path program 71 times [2021-06-05 22:39:07,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:07,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298487801] [2021-06-05 22:39:07,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:07,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:07,842 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:07,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:07,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298487801] [2021-06-05 22:39:07,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298487801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:07,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3692490] [2021-06-05 22:39:07,842 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:07,878 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:39:07,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:07,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:39:07,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:08,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:39:08,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:39:08,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:39:08,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 12 [2021-06-05 22:39:08,075 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:08,079 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:08,080 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:08,080 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:5 [2021-06-05 22:39:08,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:08,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3692490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:08,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:08,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 22:39:08,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011240967] [2021-06-05 22:39:08,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:39:08,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:08,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:39:08,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:39:08,119 INFO L87 Difference]: Start difference. First operand 9987 states and 44906 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:09,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:09,592 INFO L93 Difference]: Finished difference Result 10924 states and 48598 transitions. [2021-06-05 22:39:09,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 22:39:09,592 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:39:09,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:09,617 INFO L225 Difference]: With dead ends: 10924 [2021-06-05 22:39:09,618 INFO L226 Difference]: Without dead ends: 10819 [2021-06-05 22:39:09,618 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 916.1ms TimeCoverageRelationStatistics Valid=205, Invalid=1775, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:39:09,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10819 states. [2021-06-05 22:39:09,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10819 to 9995. [2021-06-05 22:39:09,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9995 states, 9994 states have (on average 4.496698018811287) internal successors, (44940), 9994 states have internal predecessors, (44940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:09,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9995 states to 9995 states and 44940 transitions. [2021-06-05 22:39:09,832 INFO L78 Accepts]: Start accepts. Automaton has 9995 states and 44940 transitions. Word has length 30 [2021-06-05 22:39:09,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:09,832 INFO L482 AbstractCegarLoop]: Abstraction has 9995 states and 44940 transitions. [2021-06-05 22:39:09,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:09,833 INFO L276 IsEmpty]: Start isEmpty. Operand 9995 states and 44940 transitions. [2021-06-05 22:39:09,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:39:09,850 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:09,850 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:10,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable650 [2021-06-05 22:39:10,050 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:10,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:10,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1222660956, now seen corresponding path program 73 times [2021-06-05 22:39:10,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:10,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194433574] [2021-06-05 22:39:10,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:10,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:10,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:10,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:10,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194433574] [2021-06-05 22:39:10,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194433574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:10,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147116388] [2021-06-05 22:39:10,241 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:10,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:10,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:39:10,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:10,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:39:10,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:39:10,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:39:10,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-06-05 22:39:10,438 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:10,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:10,444 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:10,444 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:11 [2021-06-05 22:39:10,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:10,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147116388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:10,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:10,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 22:39:10,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459098046] [2021-06-05 22:39:10,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:39:10,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:10,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:39:10,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:39:10,472 INFO L87 Difference]: Start difference. First operand 9995 states and 44940 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:11,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:11,476 INFO L93 Difference]: Finished difference Result 10951 states and 48605 transitions. [2021-06-05 22:39:11,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:39:11,476 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:39:11,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:11,500 INFO L225 Difference]: With dead ends: 10951 [2021-06-05 22:39:11,500 INFO L226 Difference]: Without dead ends: 10843 [2021-06-05 22:39:11,501 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 687.1ms TimeCoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:39:11,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10843 states. [2021-06-05 22:39:11,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10843 to 10009. [2021-06-05 22:39:11,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10009 states, 10008 states have (on average 4.496302957633893) internal successors, (44999), 10008 states have internal predecessors, (44999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:11,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10009 states to 10009 states and 44999 transitions. [2021-06-05 22:39:11,717 INFO L78 Accepts]: Start accepts. Automaton has 10009 states and 44999 transitions. Word has length 30 [2021-06-05 22:39:11,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:11,718 INFO L482 AbstractCegarLoop]: Abstraction has 10009 states and 44999 transitions. [2021-06-05 22:39:11,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:11,718 INFO L276 IsEmpty]: Start isEmpty. Operand 10009 states and 44999 transitions. [2021-06-05 22:39:11,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:39:11,735 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:11,735 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:11,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable651 [2021-06-05 22:39:11,936 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:11,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:11,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1068030562, now seen corresponding path program 72 times [2021-06-05 22:39:11,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:11,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242354929] [2021-06-05 22:39:11,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:11,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:12,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:12,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:12,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242354929] [2021-06-05 22:39:12,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242354929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:12,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600362850] [2021-06-05 22:39:12,128 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:12,163 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:39:12,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:12,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 22:39:12,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:12,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:39:12,337 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:12,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 56 [2021-06-05 22:39:12,349 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:39:12,465 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-06-05 22:39:12,466 INFO L628 ElimStorePlain]: treesize reduction 64, result has 54.6 percent of original size [2021-06-05 22:39:12,468 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:12,468 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:77 [2021-06-05 22:39:12,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:12,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600362850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:12,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:12,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 22:39:12,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269982031] [2021-06-05 22:39:12,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:39:12,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:12,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:39:12,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:39:12,726 INFO L87 Difference]: Start difference. First operand 10009 states and 44999 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:13,388 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2021-06-05 22:39:16,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:16,098 INFO L93 Difference]: Finished difference Result 11203 states and 49540 transitions. [2021-06-05 22:39:16,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 22:39:16,098 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:39:16,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:16,123 INFO L225 Difference]: With dead ends: 11203 [2021-06-05 22:39:16,123 INFO L226 Difference]: Without dead ends: 10979 [2021-06-05 22:39:16,123 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 2513.6ms TimeCoverageRelationStatistics Valid=372, Invalid=3660, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 22:39:16,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10979 states. [2021-06-05 22:39:16,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10979 to 10005. [2021-06-05 22:39:16,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10005 states, 10004 states have (on average 4.49640143942423) internal successors, (44982), 10004 states have internal predecessors, (44982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:16,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10005 states to 10005 states and 44982 transitions. [2021-06-05 22:39:16,332 INFO L78 Accepts]: Start accepts. Automaton has 10005 states and 44982 transitions. Word has length 30 [2021-06-05 22:39:16,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:16,332 INFO L482 AbstractCegarLoop]: Abstraction has 10005 states and 44982 transitions. [2021-06-05 22:39:16,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:16,332 INFO L276 IsEmpty]: Start isEmpty. Operand 10005 states and 44982 transitions. [2021-06-05 22:39:16,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:39:16,349 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:16,349 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:16,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable652 [2021-06-05 22:39:16,550 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:16,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:16,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1222272674, now seen corresponding path program 73 times [2021-06-05 22:39:16,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:16,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198146659] [2021-06-05 22:39:16,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:16,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:16,736 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:16,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:16,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198146659] [2021-06-05 22:39:16,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198146659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:16,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497224494] [2021-06-05 22:39:16,737 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:16,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:16,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:39:16,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:16,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:39:16,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:39:16,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:39:16,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 22:39:16,919 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:16,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:16,926 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:16,926 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 22:39:16,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:16,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497224494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:16,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:16,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-06-05 22:39:16,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569469764] [2021-06-05 22:39:16,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:39:16,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:16,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:39:16,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:39:16,956 INFO L87 Difference]: Start difference. First operand 10005 states and 44982 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:17,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:17,868 INFO L93 Difference]: Finished difference Result 10674 states and 47572 transitions. [2021-06-05 22:39:17,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:39:17,868 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:39:17,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:17,892 INFO L225 Difference]: With dead ends: 10674 [2021-06-05 22:39:17,892 INFO L226 Difference]: Without dead ends: 10569 [2021-06-05 22:39:17,893 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 683.6ms TimeCoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:39:17,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10569 states. [2021-06-05 22:39:18,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10569 to 10010. [2021-06-05 22:39:18,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10010 states, 10009 states have (on average 4.496253371965231) internal successors, (45003), 10009 states have internal predecessors, (45003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:18,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10010 states to 10010 states and 45003 transitions. [2021-06-05 22:39:18,097 INFO L78 Accepts]: Start accepts. Automaton has 10010 states and 45003 transitions. Word has length 30 [2021-06-05 22:39:18,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:18,097 INFO L482 AbstractCegarLoop]: Abstraction has 10010 states and 45003 transitions. [2021-06-05 22:39:18,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:18,097 INFO L276 IsEmpty]: Start isEmpty. Operand 10010 states and 45003 transitions. [2021-06-05 22:39:18,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:39:18,115 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:18,115 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:18,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable660,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:18,315 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:18,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:18,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1460216054, now seen corresponding path program 74 times [2021-06-05 22:39:18,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:18,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795048349] [2021-06-05 22:39:18,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:18,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:18,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:18,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:18,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795048349] [2021-06-05 22:39:18,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795048349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:18,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151029557] [2021-06-05 22:39:18,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:18,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:39:18,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:18,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:39:18,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:18,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:39:18,775 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:18,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-06-05 22:39:18,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:18,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:18,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:18,793 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:40 [2021-06-05 22:39:18,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:18,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151029557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:18,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:18,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 22:39:18,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517397681] [2021-06-05 22:39:18,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:39:18,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:18,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:39:18,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:39:18,960 INFO L87 Difference]: Start difference. First operand 10010 states and 45003 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:21,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:21,103 INFO L93 Difference]: Finished difference Result 10729 states and 47706 transitions. [2021-06-05 22:39:21,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 22:39:21,103 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:39:21,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:21,128 INFO L225 Difference]: With dead ends: 10729 [2021-06-05 22:39:21,128 INFO L226 Difference]: Without dead ends: 10577 [2021-06-05 22:39:21,128 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 1554.6ms TimeCoverageRelationStatistics Valid=331, Invalid=2021, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 22:39:21,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10577 states. [2021-06-05 22:39:21,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10577 to 10007. [2021-06-05 22:39:21,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10007 states, 10006 states have (on average 4.495802518488906) internal successors, (44985), 10006 states have internal predecessors, (44985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:21,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10007 states to 10007 states and 44985 transitions. [2021-06-05 22:39:21,333 INFO L78 Accepts]: Start accepts. Automaton has 10007 states and 44985 transitions. Word has length 30 [2021-06-05 22:39:21,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:21,333 INFO L482 AbstractCegarLoop]: Abstraction has 10007 states and 44985 transitions. [2021-06-05 22:39:21,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:21,333 INFO L276 IsEmpty]: Start isEmpty. Operand 10007 states and 44985 transitions. [2021-06-05 22:39:21,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:39:21,349 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:21,349 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:21,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable661 [2021-06-05 22:39:21,550 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:21,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:21,550 INFO L82 PathProgramCache]: Analyzing trace with hash 603104802, now seen corresponding path program 74 times [2021-06-05 22:39:21,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:21,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685337991] [2021-06-05 22:39:21,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:21,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:21,770 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:21,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:21,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685337991] [2021-06-05 22:39:21,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685337991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:21,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445512105] [2021-06-05 22:39:21,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:21,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:39:21,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:21,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:39:21,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:21,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:39:21,954 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:21,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-06-05 22:39:21,955 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:21,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:21,971 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:21,971 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:40 [2021-06-05 22:39:22,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:22,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445512105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:22,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:22,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 22:39:22,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783596499] [2021-06-05 22:39:22,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:39:22,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:22,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:39:22,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:39:22,106 INFO L87 Difference]: Start difference. First operand 10007 states and 44985 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:24,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:24,596 INFO L93 Difference]: Finished difference Result 12378 states and 54172 transitions. [2021-06-05 22:39:24,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 22:39:24,596 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:39:24,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:24,623 INFO L225 Difference]: With dead ends: 12378 [2021-06-05 22:39:24,623 INFO L226 Difference]: Without dead ends: 12258 [2021-06-05 22:39:24,624 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 1540.2ms TimeCoverageRelationStatistics Valid=402, Invalid=2568, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 22:39:24,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12258 states. [2021-06-05 22:39:24,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12258 to 10041. [2021-06-05 22:39:24,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10041 states, 10040 states have (on average 4.496812749003984) internal successors, (45148), 10040 states have internal predecessors, (45148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:24,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10041 states to 10041 states and 45148 transitions. [2021-06-05 22:39:24,855 INFO L78 Accepts]: Start accepts. Automaton has 10041 states and 45148 transitions. Word has length 30 [2021-06-05 22:39:24,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:24,855 INFO L482 AbstractCegarLoop]: Abstraction has 10041 states and 45148 transitions. [2021-06-05 22:39:24,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:24,855 INFO L276 IsEmpty]: Start isEmpty. Operand 10041 states and 45148 transitions. [2021-06-05 22:39:24,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:39:24,873 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:24,873 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:25,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable666 [2021-06-05 22:39:25,073 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:25,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:25,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1925833962, now seen corresponding path program 75 times [2021-06-05 22:39:25,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:25,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461648572] [2021-06-05 22:39:25,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:25,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:25,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:25,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:25,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461648572] [2021-06-05 22:39:25,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461648572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:25,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840869591] [2021-06-05 22:39:25,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:25,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:39:25,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:25,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:39:25,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:25,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:39:25,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:39:25,445 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:25,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 34 [2021-06-05 22:39:25,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:25,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:25,466 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:25,466 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:92 [2021-06-05 22:39:25,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:25,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840869591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:25,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:25,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 22:39:25,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331688013] [2021-06-05 22:39:25,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:39:25,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:25,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:39:25,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:39:25,625 INFO L87 Difference]: Start difference. First operand 10041 states and 45148 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:29,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:29,372 INFO L93 Difference]: Finished difference Result 12725 states and 55200 transitions. [2021-06-05 22:39:29,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 22:39:29,373 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:39:29,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:29,402 INFO L225 Difference]: With dead ends: 12725 [2021-06-05 22:39:29,402 INFO L226 Difference]: Without dead ends: 12492 [2021-06-05 22:39:29,403 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1330 ImplicationChecksByTransitivity, 2474.6ms TimeCoverageRelationStatistics Valid=599, Invalid=4093, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 22:39:29,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12492 states. [2021-06-05 22:39:29,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12492 to 10045. [2021-06-05 22:39:29,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10045 states, 10044 states have (on average 4.495221027479092) internal successors, (45150), 10044 states have internal predecessors, (45150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:29,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10045 states to 10045 states and 45150 transitions. [2021-06-05 22:39:29,627 INFO L78 Accepts]: Start accepts. Automaton has 10045 states and 45150 transitions. Word has length 30 [2021-06-05 22:39:29,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:29,627 INFO L482 AbstractCegarLoop]: Abstraction has 10045 states and 45150 transitions. [2021-06-05 22:39:29,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:29,627 INFO L276 IsEmpty]: Start isEmpty. Operand 10045 states and 45150 transitions. [2021-06-05 22:39:29,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:39:29,644 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:29,644 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:29,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable671,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:29,845 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:29,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:29,845 INFO L82 PathProgramCache]: Analyzing trace with hash -726234836, now seen corresponding path program 31 times [2021-06-05 22:39:29,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:29,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500344955] [2021-06-05 22:39:29,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:29,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:30,052 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:30,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:30,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500344955] [2021-06-05 22:39:30,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500344955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:30,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035459254] [2021-06-05 22:39:30,052 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:30,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:30,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:39:30,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:30,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:39:30,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:39:30,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:39:30,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 22:39:30,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:30,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:30,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:30,246 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 22:39:30,298 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:30,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035459254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:30,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:30,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 22:39:30,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644118980] [2021-06-05 22:39:30,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:39:30,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:30,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:39:30,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:39:30,299 INFO L87 Difference]: Start difference. First operand 10045 states and 45150 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:31,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:31,883 INFO L93 Difference]: Finished difference Result 10659 states and 47531 transitions. [2021-06-05 22:39:31,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:39:31,884 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:39:31,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:31,907 INFO L225 Difference]: With dead ends: 10659 [2021-06-05 22:39:31,907 INFO L226 Difference]: Without dead ends: 10545 [2021-06-05 22:39:31,907 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 1229.1ms TimeCoverageRelationStatistics Valid=270, Invalid=1370, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:39:31,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10545 states. [2021-06-05 22:39:32,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10545 to 10063. [2021-06-05 22:39:32,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10063 states, 10062 states have (on average 4.494633273703041) internal successors, (45225), 10062 states have internal predecessors, (45225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:32,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10063 states to 10063 states and 45225 transitions. [2021-06-05 22:39:32,106 INFO L78 Accepts]: Start accepts. Automaton has 10063 states and 45225 transitions. Word has length 30 [2021-06-05 22:39:32,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:32,106 INFO L482 AbstractCegarLoop]: Abstraction has 10063 states and 45225 transitions. [2021-06-05 22:39:32,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:32,106 INFO L276 IsEmpty]: Start isEmpty. Operand 10063 states and 45225 transitions. [2021-06-05 22:39:32,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:39:32,123 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:32,123 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:32,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable678 [2021-06-05 22:39:32,324 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:32,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:32,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1039761232, now seen corresponding path program 32 times [2021-06-05 22:39:32,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:32,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770204529] [2021-06-05 22:39:32,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:32,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:32,581 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:32,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:32,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770204529] [2021-06-05 22:39:32,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770204529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:32,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114955541] [2021-06-05 22:39:32,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:32,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:39:32,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:32,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:39:32,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:32,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:39:32,805 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:32,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-06-05 22:39:32,807 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:32,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:32,826 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:32,827 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:66 [2021-06-05 22:39:33,015 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:33,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114955541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:33,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:33,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 22:39:33,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136182494] [2021-06-05 22:39:33,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:39:33,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:33,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:39:33,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:39:33,016 INFO L87 Difference]: Start difference. First operand 10063 states and 45225 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:35,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:35,367 INFO L93 Difference]: Finished difference Result 10974 states and 48573 transitions. [2021-06-05 22:39:35,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 22:39:35,367 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:39:35,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:35,393 INFO L225 Difference]: With dead ends: 10974 [2021-06-05 22:39:35,393 INFO L226 Difference]: Without dead ends: 10651 [2021-06-05 22:39:35,393 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 1982.3ms TimeCoverageRelationStatistics Valid=438, Invalid=2424, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 22:39:35,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10651 states. [2021-06-05 22:39:35,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10651 to 10076. [2021-06-05 22:39:35,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10076 states, 10075 states have (on average 4.49409429280397) internal successors, (45278), 10075 states have internal predecessors, (45278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:35,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10076 states to 10076 states and 45278 transitions. [2021-06-05 22:39:35,618 INFO L78 Accepts]: Start accepts. Automaton has 10076 states and 45278 transitions. Word has length 30 [2021-06-05 22:39:35,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:35,619 INFO L482 AbstractCegarLoop]: Abstraction has 10076 states and 45278 transitions. [2021-06-05 22:39:35,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:35,619 INFO L276 IsEmpty]: Start isEmpty. Operand 10076 states and 45278 transitions. [2021-06-05 22:39:35,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:39:35,636 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:35,636 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:35,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable679 [2021-06-05 22:39:35,837 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:35,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:35,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1146174864, now seen corresponding path program 75 times [2021-06-05 22:39:35,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:35,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059096668] [2021-06-05 22:39:35,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:35,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:36,020 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:36,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:36,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059096668] [2021-06-05 22:39:36,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059096668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:36,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714026185] [2021-06-05 22:39:36,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:36,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:39:36,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:36,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:39:36,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:36,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:39:36,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:39:36,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:39:36,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 22:39:36,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:36,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:36,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:36,268 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:11 [2021-06-05 22:39:36,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:36,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714026185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:36,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:36,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 22:39:36,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654777184] [2021-06-05 22:39:36,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:39:36,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:36,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:39:36,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:39:36,311 INFO L87 Difference]: Start difference. First operand 10076 states and 45278 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:37,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:37,439 INFO L93 Difference]: Finished difference Result 10655 states and 47486 transitions. [2021-06-05 22:39:37,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:39:37,439 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:39:37,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:37,463 INFO L225 Difference]: With dead ends: 10655 [2021-06-05 22:39:37,463 INFO L226 Difference]: Without dead ends: 10524 [2021-06-05 22:39:37,463 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 762.9ms TimeCoverageRelationStatistics Valid=213, Invalid=1269, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:39:37,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10524 states. [2021-06-05 22:39:37,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10524 to 10076. [2021-06-05 22:39:37,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10076 states, 10075 states have (on average 4.493697270471464) internal successors, (45274), 10075 states have internal predecessors, (45274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:37,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10076 states to 10076 states and 45274 transitions. [2021-06-05 22:39:37,663 INFO L78 Accepts]: Start accepts. Automaton has 10076 states and 45274 transitions. Word has length 30 [2021-06-05 22:39:37,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:37,663 INFO L482 AbstractCegarLoop]: Abstraction has 10076 states and 45274 transitions. [2021-06-05 22:39:37,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:37,663 INFO L276 IsEmpty]: Start isEmpty. Operand 10076 states and 45274 transitions. [2021-06-05 22:39:37,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:39:37,681 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:37,681 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:37,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable684 [2021-06-05 22:39:37,881 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:37,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:37,881 INFO L82 PathProgramCache]: Analyzing trace with hash -441805900, now seen corresponding path program 76 times [2021-06-05 22:39:37,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:37,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795652213] [2021-06-05 22:39:37,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:37,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:38,117 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:38,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:38,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795652213] [2021-06-05 22:39:38,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795652213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:38,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028050104] [2021-06-05 22:39:38,117 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:38,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:39:38,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:38,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:39:38,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:38,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:39:38,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:39:38,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:39:38,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 22:39:38,322 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:38,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:38,329 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:38,329 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 22:39:38,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:38,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028050104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:38,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:38,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-05 22:39:38,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011792966] [2021-06-05 22:39:38,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:39:38,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:38,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:39:38,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:39:38,378 INFO L87 Difference]: Start difference. First operand 10076 states and 45274 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:39,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:39,697 INFO L93 Difference]: Finished difference Result 10582 states and 47190 transitions. [2021-06-05 22:39:39,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 22:39:39,698 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:39:39,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:39,723 INFO L225 Difference]: With dead ends: 10582 [2021-06-05 22:39:39,724 INFO L226 Difference]: Without dead ends: 10467 [2021-06-05 22:39:39,724 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 989.6ms TimeCoverageRelationStatistics Valid=191, Invalid=1449, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 22:39:39,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10467 states. [2021-06-05 22:39:39,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10467 to 10080. [2021-06-05 22:39:39,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10080 states, 10079 states have (on average 4.4936005556106755) internal successors, (45291), 10079 states have internal predecessors, (45291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:39,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10080 states to 10080 states and 45291 transitions. [2021-06-05 22:39:39,923 INFO L78 Accepts]: Start accepts. Automaton has 10080 states and 45291 transitions. Word has length 30 [2021-06-05 22:39:39,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:39,923 INFO L482 AbstractCegarLoop]: Abstraction has 10080 states and 45291 transitions. [2021-06-05 22:39:39,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:39,923 INFO L276 IsEmpty]: Start isEmpty. Operand 10080 states and 45291 transitions. [2021-06-05 22:39:39,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:39:39,940 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:39,940 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:40,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 315 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable685 [2021-06-05 22:39:40,140 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:40,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:40,141 INFO L82 PathProgramCache]: Analyzing trace with hash -974562882, now seen corresponding path program 77 times [2021-06-05 22:39:40,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:40,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140202467] [2021-06-05 22:39:40,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:40,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:40,364 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:40,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:40,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140202467] [2021-06-05 22:39:40,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140202467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:40,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653577622] [2021-06-05 22:39:40,365 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:40,400 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:39:40,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:40,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:39:40,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:40,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:39:40,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:39:40,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:39:40,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 22:39:40,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:40,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:40,591 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:40,591 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:7 [2021-06-05 22:39:40,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:40,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653577622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:40,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:40,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-06-05 22:39:40,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542523418] [2021-06-05 22:39:40,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:39:40,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:40,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:39:40,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:39:40,631 INFO L87 Difference]: Start difference. First operand 10080 states and 45291 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:41,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:41,862 INFO L93 Difference]: Finished difference Result 10379 states and 46374 transitions. [2021-06-05 22:39:41,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 22:39:41,862 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:39:41,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:41,885 INFO L225 Difference]: With dead ends: 10379 [2021-06-05 22:39:41,885 INFO L226 Difference]: Without dead ends: 10320 [2021-06-05 22:39:41,886 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 856.9ms TimeCoverageRelationStatistics Valid=163, Invalid=1319, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:39:41,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10320 states. [2021-06-05 22:39:42,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10320 to 10080. [2021-06-05 22:39:42,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10080 states, 10079 states have (on average 4.493501339418593) internal successors, (45290), 10079 states have internal predecessors, (45290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:42,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10080 states to 10080 states and 45290 transitions. [2021-06-05 22:39:42,077 INFO L78 Accepts]: Start accepts. Automaton has 10080 states and 45290 transitions. Word has length 30 [2021-06-05 22:39:42,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:42,077 INFO L482 AbstractCegarLoop]: Abstraction has 10080 states and 45290 transitions. [2021-06-05 22:39:42,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:42,077 INFO L276 IsEmpty]: Start isEmpty. Operand 10080 states and 45290 transitions. [2021-06-05 22:39:42,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:39:42,094 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:42,094 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:42,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 316 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable686 [2021-06-05 22:39:42,294 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:42,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:42,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1704808642, now seen corresponding path program 78 times [2021-06-05 22:39:42,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:42,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223635696] [2021-06-05 22:39:42,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:42,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:42,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:42,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:42,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223635696] [2021-06-05 22:39:42,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223635696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:42,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196560437] [2021-06-05 22:39:42,500 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:42,538 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:39:42,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:42,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:39:42,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:42,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:39:42,793 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:42,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 57 [2021-06-05 22:39:42,795 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:42,840 INFO L628 ElimStorePlain]: treesize reduction 5, result has 92.2 percent of original size [2021-06-05 22:39:42,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:42,884 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:469 [2021-06-05 22:39:43,044 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2021-06-05 22:39:43,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:43,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196560437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:43,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:43,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 22:39:43,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261018630] [2021-06-05 22:39:43,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:39:43,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:43,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:39:43,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:39:43,360 INFO L87 Difference]: Start difference. First operand 10080 states and 45290 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:44,860 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-06-05 22:39:45,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:45,760 INFO L93 Difference]: Finished difference Result 11125 states and 49250 transitions. [2021-06-05 22:39:45,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 22:39:45,760 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:39:45,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:45,784 INFO L225 Difference]: With dead ends: 11125 [2021-06-05 22:39:45,785 INFO L226 Difference]: Without dead ends: 11002 [2021-06-05 22:39:45,785 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1863.7ms TimeCoverageRelationStatistics Valid=232, Invalid=2024, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 22:39:45,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11002 states. [2021-06-05 22:39:45,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11002 to 10117. [2021-06-05 22:39:45,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10117 states, 10116 states have (on average 4.487643337287466) internal successors, (45397), 10116 states have internal predecessors, (45397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:45,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10117 states to 10117 states and 45397 transitions. [2021-06-05 22:39:45,995 INFO L78 Accepts]: Start accepts. Automaton has 10117 states and 45397 transitions. Word has length 30 [2021-06-05 22:39:45,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:45,995 INFO L482 AbstractCegarLoop]: Abstraction has 10117 states and 45397 transitions. [2021-06-05 22:39:45,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:45,995 INFO L276 IsEmpty]: Start isEmpty. Operand 10117 states and 45397 transitions. [2021-06-05 22:39:46,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:39:46,012 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:46,012 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:46,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable687 [2021-06-05 22:39:46,213 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:46,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:46,213 INFO L82 PathProgramCache]: Analyzing trace with hash 211398642, now seen corresponding path program 79 times [2021-06-05 22:39:46,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:46,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059260493] [2021-06-05 22:39:46,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:46,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:46,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:46,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:46,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059260493] [2021-06-05 22:39:46,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059260493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:46,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979440314] [2021-06-05 22:39:46,440 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:46,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:46,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:39:46,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:46,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:39:46,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:39:46,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:39:46,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 22:39:46,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:46,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:46,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:46,710 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 22:39:46,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:46,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979440314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:46,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:46,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:39:46,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609161892] [2021-06-05 22:39:46,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:39:46,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:46,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:39:46,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:39:46,772 INFO L87 Difference]: Start difference. First operand 10117 states and 45397 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:47,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:47,874 INFO L93 Difference]: Finished difference Result 10617 states and 47296 transitions. [2021-06-05 22:39:47,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:39:47,874 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:39:47,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:47,898 INFO L225 Difference]: With dead ends: 10617 [2021-06-05 22:39:47,898 INFO L226 Difference]: Without dead ends: 10467 [2021-06-05 22:39:47,898 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 990.3ms TimeCoverageRelationStatistics Valid=207, Invalid=1125, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:39:47,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10467 states. [2021-06-05 22:39:48,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10467 to 10080. [2021-06-05 22:39:48,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10080 states, 10079 states have (on average 4.493104474650263) internal successors, (45286), 10079 states have internal predecessors, (45286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:48,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10080 states to 10080 states and 45286 transitions. [2021-06-05 22:39:48,110 INFO L78 Accepts]: Start accepts. Automaton has 10080 states and 45286 transitions. Word has length 30 [2021-06-05 22:39:48,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:48,110 INFO L482 AbstractCegarLoop]: Abstraction has 10080 states and 45286 transitions. [2021-06-05 22:39:48,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:48,110 INFO L276 IsEmpty]: Start isEmpty. Operand 10080 states and 45286 transitions. [2021-06-05 22:39:48,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:39:48,129 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:48,129 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:48,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable704,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:48,330 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:48,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:48,330 INFO L82 PathProgramCache]: Analyzing trace with hash 740206354, now seen corresponding path program 33 times [2021-06-05 22:39:48,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:48,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207321524] [2021-06-05 22:39:48,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:48,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:48,544 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:48,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:48,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207321524] [2021-06-05 22:39:48,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207321524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:48,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055283869] [2021-06-05 22:39:48,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:48,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:39:48,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:48,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:39:48,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:48,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:39:48,764 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:48,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 33 [2021-06-05 22:39:48,768 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:39:48,806 INFO L628 ElimStorePlain]: treesize reduction 4, result has 92.9 percent of original size [2021-06-05 22:39:48,809 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 22:39:48,809 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:80 [2021-06-05 22:39:48,949 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:48,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055283869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:48,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:48,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 22:39:48,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686800422] [2021-06-05 22:39:48,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:39:48,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:48,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:39:48,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:39:48,950 INFO L87 Difference]: Start difference. First operand 10080 states and 45286 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:51,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:51,083 INFO L93 Difference]: Finished difference Result 11112 states and 49126 transitions. [2021-06-05 22:39:51,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 22:39:51,083 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:39:51,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:51,107 INFO L225 Difference]: With dead ends: 11112 [2021-06-05 22:39:51,107 INFO L226 Difference]: Without dead ends: 10830 [2021-06-05 22:39:51,107 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 1575.7ms TimeCoverageRelationStatistics Valid=345, Invalid=2007, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 22:39:51,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10830 states. [2021-06-05 22:39:51,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10830 to 10099. [2021-06-05 22:39:51,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10099 states, 10098 states have (on average 4.492572786690434) internal successors, (45366), 10098 states have internal predecessors, (45366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:51,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10099 states to 10099 states and 45366 transitions. [2021-06-05 22:39:51,302 INFO L78 Accepts]: Start accepts. Automaton has 10099 states and 45366 transitions. Word has length 30 [2021-06-05 22:39:51,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:51,302 INFO L482 AbstractCegarLoop]: Abstraction has 10099 states and 45366 transitions. [2021-06-05 22:39:51,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:51,302 INFO L276 IsEmpty]: Start isEmpty. Operand 10099 states and 45366 transitions. [2021-06-05 22:39:51,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:39:51,319 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:51,319 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:51,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable705 [2021-06-05 22:39:51,520 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:51,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:51,520 INFO L82 PathProgramCache]: Analyzing trace with hash -824776834, now seen corresponding path program 80 times [2021-06-05 22:39:51,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:51,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466520337] [2021-06-05 22:39:51,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:51,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:51,743 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:51,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:51,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466520337] [2021-06-05 22:39:51,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466520337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:51,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983616797] [2021-06-05 22:39:51,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:51,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:39:51,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:51,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:39:51,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:52,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:39:52,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:39:52,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:39:52,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 22:39:52,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:52,096 INFO L628 ElimStorePlain]: treesize reduction 3, result has 88.0 percent of original size [2021-06-05 22:39:52,097 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:52,097 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:11 [2021-06-05 22:39:52,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:52,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983616797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:52,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:52,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 22:39:52,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339511338] [2021-06-05 22:39:52,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:39:52,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:52,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:39:52,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:39:52,141 INFO L87 Difference]: Start difference. First operand 10099 states and 45366 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:53,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:53,257 INFO L93 Difference]: Finished difference Result 10648 states and 47418 transitions. [2021-06-05 22:39:53,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:39:53,258 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:39:53,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:53,282 INFO L225 Difference]: With dead ends: 10648 [2021-06-05 22:39:53,283 INFO L226 Difference]: Without dead ends: 10501 [2021-06-05 22:39:53,283 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 736.2ms TimeCoverageRelationStatistics Valid=165, Invalid=1025, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:39:53,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10501 states. [2021-06-05 22:39:53,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10501 to 10099. [2021-06-05 22:39:53,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10099 states, 10098 states have (on average 4.491483462071697) internal successors, (45355), 10098 states have internal predecessors, (45355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:53,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10099 states to 10099 states and 45355 transitions. [2021-06-05 22:39:53,480 INFO L78 Accepts]: Start accepts. Automaton has 10099 states and 45355 transitions. Word has length 30 [2021-06-05 22:39:53,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:53,480 INFO L482 AbstractCegarLoop]: Abstraction has 10099 states and 45355 transitions. [2021-06-05 22:39:53,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:53,480 INFO L276 IsEmpty]: Start isEmpty. Operand 10099 states and 45355 transitions. [2021-06-05 22:39:53,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:39:53,498 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:53,498 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:53,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable713,320 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:53,698 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:53,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:53,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1020757778, now seen corresponding path program 81 times [2021-06-05 22:39:53,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:53,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321846648] [2021-06-05 22:39:53,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:53,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:53,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:53,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:53,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321846648] [2021-06-05 22:39:53,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321846648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:53,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71445640] [2021-06-05 22:39:53,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:53,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:39:53,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:53,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:39:53,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:54,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:39:54,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:39:54,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:39:54,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 22:39:54,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:54,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:54,086 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:54,086 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:14 [2021-06-05 22:39:54,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:54,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71445640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:54,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:54,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 22:39:54,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863066273] [2021-06-05 22:39:54,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:39:54,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:54,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:39:54,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:39:54,142 INFO L87 Difference]: Start difference. First operand 10099 states and 45355 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:55,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:55,512 INFO L93 Difference]: Finished difference Result 11202 states and 49643 transitions. [2021-06-05 22:39:55,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 22:39:55,512 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:39:55,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:55,536 INFO L225 Difference]: With dead ends: 11202 [2021-06-05 22:39:55,537 INFO L226 Difference]: Without dead ends: 11069 [2021-06-05 22:39:55,537 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 952.1ms TimeCoverageRelationStatistics Valid=350, Invalid=1720, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 22:39:55,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11069 states. [2021-06-05 22:39:55,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11069 to 10109. [2021-06-05 22:39:55,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10109 states, 10108 states have (on average 4.49000791452315) internal successors, (45385), 10108 states have internal predecessors, (45385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:55,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10109 states to 10109 states and 45385 transitions. [2021-06-05 22:39:55,735 INFO L78 Accepts]: Start accepts. Automaton has 10109 states and 45385 transitions. Word has length 30 [2021-06-05 22:39:55,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:55,735 INFO L482 AbstractCegarLoop]: Abstraction has 10109 states and 45385 transitions. [2021-06-05 22:39:55,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:55,735 INFO L276 IsEmpty]: Start isEmpty. Operand 10109 states and 45385 transitions. [2021-06-05 22:39:55,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:39:55,753 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:55,753 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:55,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable714,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:55,953 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:55,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:55,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1527104044, now seen corresponding path program 82 times [2021-06-05 22:39:55,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:55,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272769516] [2021-06-05 22:39:55,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:55,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:56,155 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:56,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:56,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272769516] [2021-06-05 22:39:56,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272769516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:56,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623451746] [2021-06-05 22:39:56,155 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:56,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:39:56,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:56,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:39:56,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:56,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:39:56,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:39:56,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:39:56,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 22:39:56,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:56,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:56,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:56,372 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:14 [2021-06-05 22:39:56,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:56,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623451746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:56,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:56,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 22:39:56,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990415018] [2021-06-05 22:39:56,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:39:56,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:56,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:39:56,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:39:56,432 INFO L87 Difference]: Start difference. First operand 10109 states and 45385 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:57,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:39:57,532 INFO L93 Difference]: Finished difference Result 10710 states and 47678 transitions. [2021-06-05 22:39:57,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:39:57,533 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:39:57,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:39:57,556 INFO L225 Difference]: With dead ends: 10710 [2021-06-05 22:39:57,556 INFO L226 Difference]: Without dead ends: 10555 [2021-06-05 22:39:57,557 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 700.2ms TimeCoverageRelationStatistics Valid=183, Invalid=1007, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:39:57,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10555 states. [2021-06-05 22:39:57,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10555 to 10101. [2021-06-05 22:39:57,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10101 states, 10100 states have (on average 4.490891089108911) internal successors, (45358), 10100 states have internal predecessors, (45358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:57,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10101 states to 10101 states and 45358 transitions. [2021-06-05 22:39:57,755 INFO L78 Accepts]: Start accepts. Automaton has 10101 states and 45358 transitions. Word has length 30 [2021-06-05 22:39:57,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:39:57,756 INFO L482 AbstractCegarLoop]: Abstraction has 10101 states and 45358 transitions. [2021-06-05 22:39:57,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:39:57,756 INFO L276 IsEmpty]: Start isEmpty. Operand 10101 states and 45358 transitions. [2021-06-05 22:39:57,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:39:57,773 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:39:57,773 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:39:57,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable715 [2021-06-05 22:39:57,974 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:39:57,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:39:57,974 INFO L82 PathProgramCache]: Analyzing trace with hash 423059838, now seen corresponding path program 83 times [2021-06-05 22:39:57,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:39:57,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637641404] [2021-06-05 22:39:57,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:39:57,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:39:58,203 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:58,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:39:58,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637641404] [2021-06-05 22:39:58,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637641404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:58,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802977076] [2021-06-05 22:39:58,203 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:39:58,238 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:39:58,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:39:58,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:39:58,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:39:58,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:39:58,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:39:58,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:39:58,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 22:39:58,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:39:58,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:39:58,491 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:39:58,491 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:10 [2021-06-05 22:39:58,568 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:39:58,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802977076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:39:58,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:39:58,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 22:39:58,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751979618] [2021-06-05 22:39:58,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:39:58,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:39:58,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:39:58,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:39:58,569 INFO L87 Difference]: Start difference. First operand 10101 states and 45358 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:00,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:00,099 INFO L93 Difference]: Finished difference Result 10279 states and 45963 transitions. [2021-06-05 22:40:00,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:40:00,100 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:40:00,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:00,122 INFO L225 Difference]: With dead ends: 10279 [2021-06-05 22:40:00,122 INFO L226 Difference]: Without dead ends: 10224 [2021-06-05 22:40:00,123 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 1308.9ms TimeCoverageRelationStatistics Valid=222, Invalid=1758, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:40:00,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10224 states. [2021-06-05 22:40:00,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10224 to 10103. [2021-06-05 22:40:00,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10103 states, 10102 states have (on average 4.490496931300733) internal successors, (45363), 10102 states have internal predecessors, (45363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:00,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10103 states to 10103 states and 45363 transitions. [2021-06-05 22:40:00,317 INFO L78 Accepts]: Start accepts. Automaton has 10103 states and 45363 transitions. Word has length 30 [2021-06-05 22:40:00,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:00,317 INFO L482 AbstractCegarLoop]: Abstraction has 10103 states and 45363 transitions. [2021-06-05 22:40:00,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:00,317 INFO L276 IsEmpty]: Start isEmpty. Operand 10103 states and 45363 transitions. [2021-06-05 22:40:00,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:40:00,334 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:00,334 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:00,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable716,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:00,535 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:00,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:00,535 INFO L82 PathProgramCache]: Analyzing trace with hash -972527238, now seen corresponding path program 84 times [2021-06-05 22:40:00,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:00,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240063414] [2021-06-05 22:40:00,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:00,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:00,762 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:00,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:00,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240063414] [2021-06-05 22:40:00,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240063414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:00,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536584754] [2021-06-05 22:40:00,763 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:00,799 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:40:00,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:00,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 22:40:00,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:00,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:40:00,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:40:00,924 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:00,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 22:40:00,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:00,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:00,943 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:00,943 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:50 [2021-06-05 22:40:01,121 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:01,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536584754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:01,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:01,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 22:40:01,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362588032] [2021-06-05 22:40:01,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 22:40:01,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:01,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 22:40:01,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 22:40:01,122 INFO L87 Difference]: Start difference. First operand 10103 states and 45363 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:01,797 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-06-05 22:40:02,124 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-06-05 22:40:02,631 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2021-06-05 22:40:04,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:04,519 INFO L93 Difference]: Finished difference Result 11239 states and 49711 transitions. [2021-06-05 22:40:04,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 22:40:04,519 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:40:04,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:04,545 INFO L225 Difference]: With dead ends: 11239 [2021-06-05 22:40:04,545 INFO L226 Difference]: Without dead ends: 11042 [2021-06-05 22:40:04,546 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1477 ImplicationChecksByTransitivity, 2550.5ms TimeCoverageRelationStatistics Valid=706, Invalid=4406, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 22:40:04,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11042 states. [2021-06-05 22:40:04,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11042 to 10128. [2021-06-05 22:40:04,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10128 states, 10127 states have (on average 4.488594845462624) internal successors, (45456), 10127 states have internal predecessors, (45456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:04,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10128 states to 10128 states and 45456 transitions. [2021-06-05 22:40:04,766 INFO L78 Accepts]: Start accepts. Automaton has 10128 states and 45456 transitions. Word has length 30 [2021-06-05 22:40:04,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:04,766 INFO L482 AbstractCegarLoop]: Abstraction has 10128 states and 45456 transitions. [2021-06-05 22:40:04,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:04,766 INFO L276 IsEmpty]: Start isEmpty. Operand 10128 states and 45456 transitions. [2021-06-05 22:40:04,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:40:04,784 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:04,784 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:04,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable717,324 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:04,985 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:04,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:04,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1336230824, now seen corresponding path program 85 times [2021-06-05 22:40:04,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:04,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034354277] [2021-06-05 22:40:04,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:04,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:05,241 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:05,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:05,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034354277] [2021-06-05 22:40:05,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034354277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:05,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513855009] [2021-06-05 22:40:05,242 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:05,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:05,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:40:05,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:05,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:40:05,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:40:05,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:40:05,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 22:40:05,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:05,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:05,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:05,428 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-05 22:40:05,500 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:05,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513855009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:05,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:05,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 21 [2021-06-05 22:40:05,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325995155] [2021-06-05 22:40:05,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:40:05,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:05,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:40:05,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:40:05,501 INFO L87 Difference]: Start difference. First operand 10128 states and 45456 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:06,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:06,968 INFO L93 Difference]: Finished difference Result 10579 states and 47189 transitions. [2021-06-05 22:40:06,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:40:06,968 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:40:06,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:06,992 INFO L225 Difference]: With dead ends: 10579 [2021-06-05 22:40:06,992 INFO L226 Difference]: Without dead ends: 10465 [2021-06-05 22:40:06,992 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 1073.8ms TimeCoverageRelationStatistics Valid=171, Invalid=1161, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:40:07,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10465 states. [2021-06-05 22:40:07,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10465 to 10132. [2021-06-05 22:40:07,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10132 states, 10131 states have (on average 4.488500641595104) internal successors, (45473), 10131 states have internal predecessors, (45473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:07,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10132 states to 10132 states and 45473 transitions. [2021-06-05 22:40:07,234 INFO L78 Accepts]: Start accepts. Automaton has 10132 states and 45473 transitions. Word has length 30 [2021-06-05 22:40:07,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:07,234 INFO L482 AbstractCegarLoop]: Abstraction has 10132 states and 45473 transitions. [2021-06-05 22:40:07,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:07,234 INFO L276 IsEmpty]: Start isEmpty. Operand 10132 states and 45473 transitions. [2021-06-05 22:40:07,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:40:07,252 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:07,252 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:07,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable722 [2021-06-05 22:40:07,453 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:07,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:07,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1868987806, now seen corresponding path program 86 times [2021-06-05 22:40:07,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:07,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241288210] [2021-06-05 22:40:07,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:07,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:07,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:07,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:07,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241288210] [2021-06-05 22:40:07,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241288210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:07,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119650882] [2021-06-05 22:40:07,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:07,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:40:07,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:07,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:40:07,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:07,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:40:07,931 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:07,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-06-05 22:40:07,932 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:07,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:07,951 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:07,952 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:69 [2021-06-05 22:40:08,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:08,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119650882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:08,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:08,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 22:40:08,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652241224] [2021-06-05 22:40:08,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:40:08,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:08,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:40:08,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:40:08,207 INFO L87 Difference]: Start difference. First operand 10132 states and 45473 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:09,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:09,737 INFO L93 Difference]: Finished difference Result 10562 states and 47028 transitions. [2021-06-05 22:40:09,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 22:40:09,738 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:40:09,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:09,762 INFO L225 Difference]: With dead ends: 10562 [2021-06-05 22:40:09,762 INFO L226 Difference]: Without dead ends: 10414 [2021-06-05 22:40:09,762 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1199.1ms TimeCoverageRelationStatistics Valid=149, Invalid=1183, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:40:09,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10414 states. [2021-06-05 22:40:09,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10414 to 10131. [2021-06-05 22:40:09,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10131 states, 10130 states have (on average 4.487857847976308) internal successors, (45462), 10130 states have internal predecessors, (45462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:09,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10131 states to 10131 states and 45462 transitions. [2021-06-05 22:40:09,965 INFO L78 Accepts]: Start accepts. Automaton has 10131 states and 45462 transitions. Word has length 30 [2021-06-05 22:40:09,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:09,965 INFO L482 AbstractCegarLoop]: Abstraction has 10131 states and 45462 transitions. [2021-06-05 22:40:09,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:09,965 INFO L276 IsEmpty]: Start isEmpty. Operand 10131 states and 45462 transitions. [2021-06-05 22:40:09,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:40:09,982 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:09,983 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:10,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable723 [2021-06-05 22:40:10,183 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:10,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:10,183 INFO L82 PathProgramCache]: Analyzing trace with hash 580244706, now seen corresponding path program 87 times [2021-06-05 22:40:10,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:10,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935426743] [2021-06-05 22:40:10,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:10,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:10,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:10,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:10,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935426743] [2021-06-05 22:40:10,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935426743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:10,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922657853] [2021-06-05 22:40:10,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:10,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:40:10,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:10,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:40:10,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:10,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:40:10,685 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:10,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-06-05 22:40:10,686 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:10,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:10,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:10,704 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:69 [2021-06-05 22:40:10,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:10,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922657853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:10,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:10,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 22:40:10,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267854454] [2021-06-05 22:40:10,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:40:10,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:10,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:40:10,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:40:10,991 INFO L87 Difference]: Start difference. First operand 10131 states and 45462 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:14,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:14,419 INFO L93 Difference]: Finished difference Result 10829 states and 47863 transitions. [2021-06-05 22:40:14,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 22:40:14,419 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:40:14,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:14,444 INFO L225 Difference]: With dead ends: 10829 [2021-06-05 22:40:14,444 INFO L226 Difference]: Without dead ends: 10605 [2021-06-05 22:40:14,445 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1254 ImplicationChecksByTransitivity, 2614.4ms TimeCoverageRelationStatistics Valid=554, Invalid=3736, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 22:40:14,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10605 states. [2021-06-05 22:40:14,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10605 to 10133. [2021-06-05 22:40:14,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10133 states, 10132 states have (on average 4.48756415317805) internal successors, (45468), 10132 states have internal predecessors, (45468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:14,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10133 states to 10133 states and 45468 transitions. [2021-06-05 22:40:14,655 INFO L78 Accepts]: Start accepts. Automaton has 10133 states and 45468 transitions. Word has length 30 [2021-06-05 22:40:14,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:14,656 INFO L482 AbstractCegarLoop]: Abstraction has 10133 states and 45468 transitions. [2021-06-05 22:40:14,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:14,656 INFO L276 IsEmpty]: Start isEmpty. Operand 10133 states and 45468 transitions. [2021-06-05 22:40:14,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:40:14,674 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:14,674 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:14,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable728,327 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:14,875 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:14,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:14,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1970358584, now seen corresponding path program 88 times [2021-06-05 22:40:14,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:14,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407580290] [2021-06-05 22:40:14,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:14,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:15,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:15,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:15,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407580290] [2021-06-05 22:40:15,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407580290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:15,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320450203] [2021-06-05 22:40:15,246 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:15,283 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:40:15,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:15,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:40:15,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:15,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:40:15,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:40:15,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:40:15,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 22:40:15,455 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:15,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:15,464 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:15,465 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-05 22:40:15,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:15,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320450203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:15,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:15,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 22:40:15,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9083609] [2021-06-05 22:40:15,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:40:15,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:15,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:40:15,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:40:15,562 INFO L87 Difference]: Start difference. First operand 10133 states and 45468 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:17,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:17,155 INFO L93 Difference]: Finished difference Result 10579 states and 47136 transitions. [2021-06-05 22:40:17,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:40:17,155 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:40:17,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:17,179 INFO L225 Difference]: With dead ends: 10579 [2021-06-05 22:40:17,179 INFO L226 Difference]: Without dead ends: 10447 [2021-06-05 22:40:17,180 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1376.9ms TimeCoverageRelationStatistics Valid=212, Invalid=1194, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:40:17,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10447 states. [2021-06-05 22:40:17,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10447 to 10144. [2021-06-05 22:40:17,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10144 states, 10143 states have (on average 4.486345262742779) internal successors, (45505), 10143 states have internal predecessors, (45505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:17,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10144 states to 10144 states and 45505 transitions. [2021-06-05 22:40:17,392 INFO L78 Accepts]: Start accepts. Automaton has 10144 states and 45505 transitions. Word has length 30 [2021-06-05 22:40:17,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:17,392 INFO L482 AbstractCegarLoop]: Abstraction has 10144 states and 45505 transitions. [2021-06-05 22:40:17,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:17,392 INFO L276 IsEmpty]: Start isEmpty. Operand 10144 states and 45505 transitions. [2021-06-05 22:40:17,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:40:17,409 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:17,409 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:17,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable735,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:17,610 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:17,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:17,610 INFO L82 PathProgramCache]: Analyzing trace with hash 555435182, now seen corresponding path program 89 times [2021-06-05 22:40:17,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:17,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649335385] [2021-06-05 22:40:17,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:17,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:17,817 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:17,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:17,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649335385] [2021-06-05 22:40:17,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649335385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:17,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772593460] [2021-06-05 22:40:17,818 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:17,853 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:40:17,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:17,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:40:17,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:17,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:40:17,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:40:17,987 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:17,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-06-05 22:40:17,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:18,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:18,015 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:18,015 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:183 [2021-06-05 22:40:18,149 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:18,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772593460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:18,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:18,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 22:40:18,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840325481] [2021-06-05 22:40:18,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:40:18,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:18,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:40:18,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:40:18,150 INFO L87 Difference]: Start difference. First operand 10144 states and 45505 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:20,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:20,054 INFO L93 Difference]: Finished difference Result 11112 states and 49318 transitions. [2021-06-05 22:40:20,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 22:40:20,054 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:40:20,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:20,078 INFO L225 Difference]: With dead ends: 11112 [2021-06-05 22:40:20,079 INFO L226 Difference]: Without dead ends: 11007 [2021-06-05 22:40:20,079 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 1441.6ms TimeCoverageRelationStatistics Valid=315, Invalid=1847, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 22:40:20,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11007 states. [2021-06-05 22:40:20,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11007 to 10144. [2021-06-05 22:40:20,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10144 states, 10143 states have (on average 4.486345262742779) internal successors, (45505), 10143 states have internal predecessors, (45505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:20,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10144 states to 10144 states and 45505 transitions. [2021-06-05 22:40:20,367 INFO L78 Accepts]: Start accepts. Automaton has 10144 states and 45505 transitions. Word has length 30 [2021-06-05 22:40:20,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:20,367 INFO L482 AbstractCegarLoop]: Abstraction has 10144 states and 45505 transitions. [2021-06-05 22:40:20,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:20,367 INFO L276 IsEmpty]: Start isEmpty. Operand 10144 states and 45505 transitions. [2021-06-05 22:40:20,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:40:20,386 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:20,386 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:20,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable736 [2021-06-05 22:40:20,586 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:20,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:20,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1224813476, now seen corresponding path program 90 times [2021-06-05 22:40:20,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:20,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690964600] [2021-06-05 22:40:20,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:20,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:20,802 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:20,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:20,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690964600] [2021-06-05 22:40:20,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690964600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:20,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797880188] [2021-06-05 22:40:20,802 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:20,837 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 22:40:20,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:20,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:40:20,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:20,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:40:20,954 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:20,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 49 [2021-06-05 22:40:20,956 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:20,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:20,974 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:20,974 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:49 [2021-06-05 22:40:21,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:21,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797880188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:21,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:21,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 22:40:21,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062751134] [2021-06-05 22:40:21,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 22:40:21,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:21,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 22:40:21,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:40:21,177 INFO L87 Difference]: Start difference. First operand 10144 states and 45505 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:23,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:23,662 INFO L93 Difference]: Finished difference Result 11292 states and 50081 transitions. [2021-06-05 22:40:23,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 22:40:23,662 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:40:23,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:23,688 INFO L225 Difference]: With dead ends: 11292 [2021-06-05 22:40:23,689 INFO L226 Difference]: Without dead ends: 11172 [2021-06-05 22:40:23,689 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 1812.6ms TimeCoverageRelationStatistics Valid=448, Invalid=2744, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 22:40:23,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11172 states. [2021-06-05 22:40:23,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11172 to 10143. [2021-06-05 22:40:23,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10143 states, 10142 states have (on average 4.48590021691974) internal successors, (45496), 10142 states have internal predecessors, (45496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:23,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10143 states to 10143 states and 45496 transitions. [2021-06-05 22:40:23,935 INFO L78 Accepts]: Start accepts. Automaton has 10143 states and 45496 transitions. Word has length 30 [2021-06-05 22:40:23,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:23,935 INFO L482 AbstractCegarLoop]: Abstraction has 10143 states and 45496 transitions. [2021-06-05 22:40:23,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:23,935 INFO L276 IsEmpty]: Start isEmpty. Operand 10143 states and 45496 transitions. [2021-06-05 22:40:23,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:40:23,954 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:23,954 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:24,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable744,330 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:24,157 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:24,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:24,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1485718586, now seen corresponding path program 91 times [2021-06-05 22:40:24,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:24,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859920419] [2021-06-05 22:40:24,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:24,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:24,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:24,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:24,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859920419] [2021-06-05 22:40:24,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859920419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:24,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522352075] [2021-06-05 22:40:24,380 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:24,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:24,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:40:24,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:24,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:40:24,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:40:24,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:40:24,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 22:40:24,533 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:24,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:24,541 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:24,541 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-05 22:40:24,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:24,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522352075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:24,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:24,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:40:24,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086076151] [2021-06-05 22:40:24,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:40:24,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:24,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:40:24,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:40:24,617 INFO L87 Difference]: Start difference. First operand 10143 states and 45496 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:26,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:26,226 INFO L93 Difference]: Finished difference Result 10920 states and 48485 transitions. [2021-06-05 22:40:26,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 22:40:26,226 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:40:26,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:26,251 INFO L225 Difference]: With dead ends: 10920 [2021-06-05 22:40:26,251 INFO L226 Difference]: Without dead ends: 10749 [2021-06-05 22:40:26,251 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 1336.7ms TimeCoverageRelationStatistics Valid=365, Invalid=1797, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 22:40:26,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10749 states. [2021-06-05 22:40:26,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10749 to 10129. [2021-06-05 22:40:26,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10129 states, 10128 states have (on average 4.488151658767772) internal successors, (45456), 10128 states have internal predecessors, (45456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:26,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10129 states to 10129 states and 45456 transitions. [2021-06-05 22:40:26,484 INFO L78 Accepts]: Start accepts. Automaton has 10129 states and 45456 transitions. Word has length 30 [2021-06-05 22:40:26,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:26,484 INFO L482 AbstractCegarLoop]: Abstraction has 10129 states and 45456 transitions. [2021-06-05 22:40:26,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:26,484 INFO L276 IsEmpty]: Start isEmpty. Operand 10129 states and 45456 transitions. [2021-06-05 22:40:26,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:40:26,503 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:26,503 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:26,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable749 [2021-06-05 22:40:26,704 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:26,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:26,704 INFO L82 PathProgramCache]: Analyzing trace with hash 97329558, now seen corresponding path program 8 times [2021-06-05 22:40:26,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:26,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361865327] [2021-06-05 22:40:26,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:26,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:26,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:26,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:26,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361865327] [2021-06-05 22:40:26,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361865327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:26,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484160069] [2021-06-05 22:40:26,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:26,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:40:26,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:26,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:40:26,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:27,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:40:27,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:40:27,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:40:27,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 22:40:27,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:27,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:27,035 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:27,035 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 22:40:27,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:27,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484160069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:27,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:27,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 22:40:27,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680818820] [2021-06-05 22:40:27,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 22:40:27,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:27,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 22:40:27,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 22:40:27,067 INFO L87 Difference]: Start difference. First operand 10129 states and 45456 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:27,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:27,813 INFO L93 Difference]: Finished difference Result 10633 states and 47318 transitions. [2021-06-05 22:40:27,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 22:40:27,813 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:40:27,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:27,837 INFO L225 Difference]: With dead ends: 10633 [2021-06-05 22:40:27,837 INFO L226 Difference]: Without dead ends: 10432 [2021-06-05 22:40:27,838 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 335.5ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:40:27,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10432 states. [2021-06-05 22:40:27,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10432 to 10132. [2021-06-05 22:40:28,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10132 states, 10131 states have (on average 4.488105813838713) internal successors, (45469), 10131 states have internal predecessors, (45469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:28,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10132 states to 10132 states and 45469 transitions. [2021-06-05 22:40:28,041 INFO L78 Accepts]: Start accepts. Automaton has 10132 states and 45469 transitions. Word has length 30 [2021-06-05 22:40:28,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:28,041 INFO L482 AbstractCegarLoop]: Abstraction has 10132 states and 45469 transitions. [2021-06-05 22:40:28,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:28,041 INFO L276 IsEmpty]: Start isEmpty. Operand 10132 states and 45469 transitions. [2021-06-05 22:40:28,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:40:28,060 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:28,060 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:28,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 332 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable750 [2021-06-05 22:40:28,261 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:28,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:28,261 INFO L82 PathProgramCache]: Analyzing trace with hash -949036506, now seen corresponding path program 76 times [2021-06-05 22:40:28,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:28,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503728955] [2021-06-05 22:40:28,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:28,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:28,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:28,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:28,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503728955] [2021-06-05 22:40:28,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503728955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:28,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797425998] [2021-06-05 22:40:28,447 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:28,481 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:40:28,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:28,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:40:28,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:28,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:40:28,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:40:28,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:40:28,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 22:40:28,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:28,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:28,657 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:28,657 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 22:40:28,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:28,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797425998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:28,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:28,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 22:40:28,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439409634] [2021-06-05 22:40:28,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:40:28,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:28,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:40:28,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:40:28,704 INFO L87 Difference]: Start difference. First operand 10132 states and 45469 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:29,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:29,733 INFO L93 Difference]: Finished difference Result 10521 states and 46957 transitions. [2021-06-05 22:40:29,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:40:29,734 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:40:29,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:29,757 INFO L225 Difference]: With dead ends: 10521 [2021-06-05 22:40:29,757 INFO L226 Difference]: Without dead ends: 10423 [2021-06-05 22:40:29,757 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 585.5ms TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-06-05 22:40:29,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10423 states. [2021-06-05 22:40:29,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10423 to 10150. [2021-06-05 22:40:29,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10150 states, 10149 states have (on average 4.4874371859296485) internal successors, (45543), 10149 states have internal predecessors, (45543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:29,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10150 states to 10150 states and 45543 transitions. [2021-06-05 22:40:29,949 INFO L78 Accepts]: Start accepts. Automaton has 10150 states and 45543 transitions. Word has length 30 [2021-06-05 22:40:29,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:29,949 INFO L482 AbstractCegarLoop]: Abstraction has 10150 states and 45543 transitions. [2021-06-05 22:40:29,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:29,949 INFO L276 IsEmpty]: Start isEmpty. Operand 10150 states and 45543 transitions. [2021-06-05 22:40:29,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:40:29,966 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:29,966 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:30,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable751 [2021-06-05 22:40:30,167 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:30,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:30,168 INFO L82 PathProgramCache]: Analyzing trace with hash -328552440, now seen corresponding path program 77 times [2021-06-05 22:40:30,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:30,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024425178] [2021-06-05 22:40:30,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:30,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:30,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:30,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:30,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024425178] [2021-06-05 22:40:30,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024425178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:30,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557534854] [2021-06-05 22:40:30,345 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:30,380 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:40:30,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:30,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:40:30,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:30,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:40:30,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:40:30,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:40:30,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 22:40:30,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:30,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:30,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:30,558 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 22:40:30,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:30,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557534854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:30,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:30,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-06-05 22:40:30,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563442276] [2021-06-05 22:40:30,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:40:30,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:30,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:40:30,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:40:30,587 INFO L87 Difference]: Start difference. First operand 10150 states and 45543 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:31,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:31,413 INFO L93 Difference]: Finished difference Result 10482 states and 46784 transitions. [2021-06-05 22:40:31,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:40:31,414 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:40:31,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:31,438 INFO L225 Difference]: With dead ends: 10482 [2021-06-05 22:40:31,438 INFO L226 Difference]: Without dead ends: 10390 [2021-06-05 22:40:31,438 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 507.8ms TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:40:31,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10390 states. [2021-06-05 22:40:31,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10390 to 10144. [2021-06-05 22:40:31,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10144 states, 10143 states have (on average 4.487331164349798) internal successors, (45515), 10143 states have internal predecessors, (45515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:31,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10144 states to 10144 states and 45515 transitions. [2021-06-05 22:40:31,636 INFO L78 Accepts]: Start accepts. Automaton has 10144 states and 45515 transitions. Word has length 30 [2021-06-05 22:40:31,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:31,637 INFO L482 AbstractCegarLoop]: Abstraction has 10144 states and 45515 transitions. [2021-06-05 22:40:31,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:31,637 INFO L276 IsEmpty]: Start isEmpty. Operand 10144 states and 45515 transitions. [2021-06-05 22:40:31,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:40:31,654 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:31,654 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:31,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 334 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable752 [2021-06-05 22:40:31,854 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:31,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:31,854 INFO L82 PathProgramCache]: Analyzing trace with hash 2032488358, now seen corresponding path program 78 times [2021-06-05 22:40:31,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:31,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513585528] [2021-06-05 22:40:31,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:31,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:32,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:32,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:32,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513585528] [2021-06-05 22:40:32,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513585528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:32,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036910907] [2021-06-05 22:40:32,044 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:32,079 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:40:32,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:32,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:40:32,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:32,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:40:32,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:40:32,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:40:32,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 22:40:32,370 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:32,383 INFO L628 ElimStorePlain]: treesize reduction 3, result has 88.0 percent of original size [2021-06-05 22:40:32,384 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:32,384 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:11 [2021-06-05 22:40:32,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:32,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036910907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:32,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:32,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 22:40:32,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286479412] [2021-06-05 22:40:32,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:40:32,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:32,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:40:32,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:40:32,427 INFO L87 Difference]: Start difference. First operand 10144 states and 45515 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:33,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:33,647 INFO L93 Difference]: Finished difference Result 10747 states and 47808 transitions. [2021-06-05 22:40:33,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 22:40:33,647 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:40:33,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:33,671 INFO L225 Difference]: With dead ends: 10747 [2021-06-05 22:40:33,671 INFO L226 Difference]: Without dead ends: 10631 [2021-06-05 22:40:33,671 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 870.7ms TimeCoverageRelationStatistics Valid=203, Invalid=1203, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:40:33,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10631 states. [2021-06-05 22:40:33,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10631 to 10138. [2021-06-05 22:40:33,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10138 states, 10137 states have (on average 4.487816908355529) internal successors, (45493), 10137 states have internal predecessors, (45493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:33,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10138 states to 10138 states and 45493 transitions. [2021-06-05 22:40:33,948 INFO L78 Accepts]: Start accepts. Automaton has 10138 states and 45493 transitions. Word has length 30 [2021-06-05 22:40:33,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:33,948 INFO L482 AbstractCegarLoop]: Abstraction has 10138 states and 45493 transitions. [2021-06-05 22:40:33,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:33,949 INFO L276 IsEmpty]: Start isEmpty. Operand 10138 states and 45493 transitions. [2021-06-05 22:40:33,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:40:33,966 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:33,966 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:34,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable753 [2021-06-05 22:40:34,167 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:34,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:34,167 INFO L82 PathProgramCache]: Analyzing trace with hash -782480168, now seen corresponding path program 79 times [2021-06-05 22:40:34,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:34,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765454065] [2021-06-05 22:40:34,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:34,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:34,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:34,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:34,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765454065] [2021-06-05 22:40:34,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765454065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:34,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049875696] [2021-06-05 22:40:34,363 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:34,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:34,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:40:34,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:34,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:40:34,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:40:34,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:40:34,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 22:40:34,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:34,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:34,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:34,561 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-05 22:40:34,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:34,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049875696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:34,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:34,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 22:40:34,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88043419] [2021-06-05 22:40:34,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:40:34,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:34,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:40:34,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:40:34,622 INFO L87 Difference]: Start difference. First operand 10138 states and 45493 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:35,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:35,697 INFO L93 Difference]: Finished difference Result 10625 states and 47358 transitions. [2021-06-05 22:40:35,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:40:35,697 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:40:35,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:35,722 INFO L225 Difference]: With dead ends: 10625 [2021-06-05 22:40:35,722 INFO L226 Difference]: Without dead ends: 10527 [2021-06-05 22:40:35,722 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 758.1ms TimeCoverageRelationStatistics Valid=182, Invalid=874, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:40:35,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10527 states. [2021-06-05 22:40:35,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10527 to 10150. [2021-06-05 22:40:35,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10150 states, 10149 states have (on average 4.487634249679771) internal successors, (45545), 10149 states have internal predecessors, (45545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:35,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10150 states to 10150 states and 45545 transitions. [2021-06-05 22:40:35,930 INFO L78 Accepts]: Start accepts. Automaton has 10150 states and 45545 transitions. Word has length 30 [2021-06-05 22:40:35,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:35,930 INFO L482 AbstractCegarLoop]: Abstraction has 10150 states and 45545 transitions. [2021-06-05 22:40:35,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:35,930 INFO L276 IsEmpty]: Start isEmpty. Operand 10150 states and 45545 transitions. [2021-06-05 22:40:35,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:40:35,947 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:35,947 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:36,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable754,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:36,147 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:36,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:36,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1027673780, now seen corresponding path program 80 times [2021-06-05 22:40:36,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:36,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994368623] [2021-06-05 22:40:36,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:36,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:36,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:36,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:36,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994368623] [2021-06-05 22:40:36,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994368623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:36,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115409367] [2021-06-05 22:40:36,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:36,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:40:36,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:36,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:40:36,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:36,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:40:36,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:40:36,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:40:36,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 22:40:36,495 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:36,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:36,503 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:36,503 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-05 22:40:36,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:36,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115409367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:36,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:36,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 22:40:36,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804106839] [2021-06-05 22:40:36,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:40:36,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:36,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:40:36,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:40:36,565 INFO L87 Difference]: Start difference. First operand 10150 states and 45545 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:37,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:37,567 INFO L93 Difference]: Finished difference Result 10653 states and 47452 transitions. [2021-06-05 22:40:37,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:40:37,568 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:40:37,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:37,591 INFO L225 Difference]: With dead ends: 10653 [2021-06-05 22:40:37,591 INFO L226 Difference]: Without dead ends: 10550 [2021-06-05 22:40:37,592 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 744.4ms TimeCoverageRelationStatistics Valid=200, Invalid=1060, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:40:37,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10550 states. [2021-06-05 22:40:37,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10550 to 10153. [2021-06-05 22:40:37,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10153 states, 10152 states have (on average 4.486702127659575) internal successors, (45549), 10152 states have internal predecessors, (45549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:37,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10153 states to 10153 states and 45549 transitions. [2021-06-05 22:40:37,794 INFO L78 Accepts]: Start accepts. Automaton has 10153 states and 45549 transitions. Word has length 30 [2021-06-05 22:40:37,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:37,794 INFO L482 AbstractCegarLoop]: Abstraction has 10153 states and 45549 transitions. [2021-06-05 22:40:37,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:37,795 INFO L276 IsEmpty]: Start isEmpty. Operand 10153 states and 45549 transitions. [2021-06-05 22:40:37,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:40:37,813 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:37,813 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:38,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable755 [2021-06-05 22:40:38,014 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:38,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:38,014 INFO L82 PathProgramCache]: Analyzing trace with hash 961883838, now seen corresponding path program 81 times [2021-06-05 22:40:38,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:38,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625933232] [2021-06-05 22:40:38,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:38,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:38,191 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:38,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:38,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625933232] [2021-06-05 22:40:38,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625933232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:38,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464317210] [2021-06-05 22:40:38,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:38,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:40:38,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:38,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:40:38,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:38,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:40:38,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:40:38,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:40:38,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 22:40:38,378 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:38,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:38,387 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:38,387 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-05 22:40:38,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:38,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464317210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:38,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:38,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 22:40:38,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806727800] [2021-06-05 22:40:38,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:40:38,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:38,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:40:38,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:40:38,538 INFO L87 Difference]: Start difference. First operand 10153 states and 45549 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:39,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:39,357 INFO L93 Difference]: Finished difference Result 10496 states and 46852 transitions. [2021-06-05 22:40:39,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:40:39,358 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:40:39,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:39,381 INFO L225 Difference]: With dead ends: 10496 [2021-06-05 22:40:39,381 INFO L226 Difference]: Without dead ends: 10398 [2021-06-05 22:40:39,381 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 657.9ms TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2021-06-05 22:40:39,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10398 states. [2021-06-05 22:40:39,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10398 to 10159. [2021-06-05 22:40:39,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10159 states, 10158 states have (on average 4.486611537704272) internal successors, (45575), 10158 states have internal predecessors, (45575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:39,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10159 states to 10159 states and 45575 transitions. [2021-06-05 22:40:39,583 INFO L78 Accepts]: Start accepts. Automaton has 10159 states and 45575 transitions. Word has length 30 [2021-06-05 22:40:39,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:39,583 INFO L482 AbstractCegarLoop]: Abstraction has 10159 states and 45575 transitions. [2021-06-05 22:40:39,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:39,584 INFO L276 IsEmpty]: Start isEmpty. Operand 10159 states and 45575 transitions. [2021-06-05 22:40:39,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:40:39,601 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:39,601 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:39,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable756 [2021-06-05 22:40:39,801 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:39,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:39,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1582367904, now seen corresponding path program 82 times [2021-06-05 22:40:39,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:39,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130616462] [2021-06-05 22:40:39,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:39,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:40,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:40,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:40,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130616462] [2021-06-05 22:40:40,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130616462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:40,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114055711] [2021-06-05 22:40:40,005 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:40,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:40:40,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:40,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:40:40,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:40,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:40:40,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:40:40,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:40:40,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 22:40:40,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:40,193 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:40,194 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:40,195 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-05 22:40:40,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:40,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114055711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:40,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:40,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-06-05 22:40:40,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872671353] [2021-06-05 22:40:40,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:40:40,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:40,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:40:40,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:40:40,244 INFO L87 Difference]: Start difference. First operand 10159 states and 45575 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:40,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:40,977 INFO L93 Difference]: Finished difference Result 10493 states and 46821 transitions. [2021-06-05 22:40:40,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:40:40,977 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:40:40,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:41,000 INFO L225 Difference]: With dead ends: 10493 [2021-06-05 22:40:41,000 INFO L226 Difference]: Without dead ends: 10401 [2021-06-05 22:40:41,001 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 510.2ms TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-06-05 22:40:41,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10401 states. [2021-06-05 22:40:41,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10401 to 10153. [2021-06-05 22:40:41,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10153 states, 10152 states have (on average 4.48650512214342) internal successors, (45547), 10152 states have internal predecessors, (45547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:41,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10153 states to 10153 states and 45547 transitions. [2021-06-05 22:40:41,197 INFO L78 Accepts]: Start accepts. Automaton has 10153 states and 45547 transitions. Word has length 30 [2021-06-05 22:40:41,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:41,197 INFO L482 AbstractCegarLoop]: Abstraction has 10153 states and 45547 transitions. [2021-06-05 22:40:41,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:41,197 INFO L276 IsEmpty]: Start isEmpty. Operand 10153 states and 45547 transitions. [2021-06-05 22:40:41,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:40:41,215 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:41,215 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:41,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable757,339 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:41,416 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:41,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:41,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1941336736, now seen corresponding path program 83 times [2021-06-05 22:40:41,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:41,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446523397] [2021-06-05 22:40:41,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:41,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:41,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:41,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:41,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446523397] [2021-06-05 22:40:41,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446523397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:41,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923315260] [2021-06-05 22:40:41,587 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:41,622 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:40:41,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:41,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:40:41,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:41,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:40:41,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:40:41,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:40:41,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 22:40:41,751 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:41,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:41,759 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:41,759 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:13 [2021-06-05 22:40:41,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:41,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923315260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:41,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:41,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:40:41,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279149045] [2021-06-05 22:40:41,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:40:41,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:41,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:40:41,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:40:41,833 INFO L87 Difference]: Start difference. First operand 10153 states and 45547 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:42,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:42,855 INFO L93 Difference]: Finished difference Result 10806 states and 48053 transitions. [2021-06-05 22:40:42,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:40:42,856 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:40:42,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:42,941 INFO L225 Difference]: With dead ends: 10806 [2021-06-05 22:40:42,941 INFO L226 Difference]: Without dead ends: 10697 [2021-06-05 22:40:42,941 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 808.2ms TimeCoverageRelationStatistics Valid=259, Invalid=1147, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:40:42,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10697 states. [2021-06-05 22:40:43,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10697 to 10153. [2021-06-05 22:40:43,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10153 states, 10152 states have (on average 4.48650512214342) internal successors, (45547), 10152 states have internal predecessors, (45547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:43,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10153 states to 10153 states and 45547 transitions. [2021-06-05 22:40:43,118 INFO L78 Accepts]: Start accepts. Automaton has 10153 states and 45547 transitions. Word has length 30 [2021-06-05 22:40:43,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:43,118 INFO L482 AbstractCegarLoop]: Abstraction has 10153 states and 45547 transitions. [2021-06-05 22:40:43,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:43,119 INFO L276 IsEmpty]: Start isEmpty. Operand 10153 states and 45547 transitions. [2021-06-05 22:40:43,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:40:43,136 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:43,136 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:43,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable758 [2021-06-05 22:40:43,336 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:43,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:43,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1717163706, now seen corresponding path program 84 times [2021-06-05 22:40:43,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:43,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783613789] [2021-06-05 22:40:43,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:43,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:43,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:43,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:43,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783613789] [2021-06-05 22:40:43,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783613789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:43,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441299234] [2021-06-05 22:40:43,522 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:43,560 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:40:43,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:43,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:40:43,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:43,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:40:43,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:40:43,702 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:43,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 34 [2021-06-05 22:40:43,704 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:43,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:43,724 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:43,724 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:95 [2021-06-05 22:40:43,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:43,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441299234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:43,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:43,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 22:40:43,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229227461] [2021-06-05 22:40:43,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:40:43,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:43,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:40:43,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:40:43,912 INFO L87 Difference]: Start difference. First operand 10153 states and 45547 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:45,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:45,294 INFO L93 Difference]: Finished difference Result 10571 states and 46985 transitions. [2021-06-05 22:40:45,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:40:45,295 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:40:45,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:45,317 INFO L225 Difference]: With dead ends: 10571 [2021-06-05 22:40:45,318 INFO L226 Difference]: Without dead ends: 10363 [2021-06-05 22:40:45,318 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1063.6ms TimeCoverageRelationStatistics Valid=218, Invalid=1188, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:40:45,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10363 states. [2021-06-05 22:40:45,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10363 to 10150. [2021-06-05 22:40:45,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10150 states, 10149 states have (on average 4.486550399054094) internal successors, (45534), 10149 states have internal predecessors, (45534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:45,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10150 states to 10150 states and 45534 transitions. [2021-06-05 22:40:45,514 INFO L78 Accepts]: Start accepts. Automaton has 10150 states and 45534 transitions. Word has length 30 [2021-06-05 22:40:45,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:45,514 INFO L482 AbstractCegarLoop]: Abstraction has 10150 states and 45534 transitions. [2021-06-05 22:40:45,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:45,514 INFO L276 IsEmpty]: Start isEmpty. Operand 10150 states and 45534 transitions. [2021-06-05 22:40:45,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:40:45,531 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:45,532 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:45,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable759 [2021-06-05 22:40:45,732 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:45,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:45,732 INFO L82 PathProgramCache]: Analyzing trace with hash 853148546, now seen corresponding path program 9 times [2021-06-05 22:40:45,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:45,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786801949] [2021-06-05 22:40:45,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:45,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:45,859 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:40:45,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:45,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786801949] [2021-06-05 22:40:45,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786801949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:45,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271288307] [2021-06-05 22:40:45,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:45,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:40:45,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:45,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:40:45,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:46,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:40:46,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:40:46,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:40:46,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 22:40:46,127 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:46,140 INFO L628 ElimStorePlain]: treesize reduction 3, result has 88.0 percent of original size [2021-06-05 22:40:46,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:46,141 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:11 [2021-06-05 22:40:46,167 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:46,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271288307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:46,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:46,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-05 22:40:46,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142471997] [2021-06-05 22:40:46,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:40:46,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:46,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:40:46,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:40:46,167 INFO L87 Difference]: Start difference. First operand 10150 states and 45534 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:46,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:46,929 INFO L93 Difference]: Finished difference Result 10534 states and 46964 transitions. [2021-06-05 22:40:46,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 22:40:46,929 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:40:46,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:46,953 INFO L225 Difference]: With dead ends: 10534 [2021-06-05 22:40:46,953 INFO L226 Difference]: Without dead ends: 10439 [2021-06-05 22:40:46,953 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 398.1ms TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-05 22:40:46,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10439 states. [2021-06-05 22:40:47,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10439 to 10168. [2021-06-05 22:40:47,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10168 states, 10167 states have (on average 4.485984066096194) internal successors, (45609), 10167 states have internal predecessors, (45609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:47,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10168 states to 10168 states and 45609 transitions. [2021-06-05 22:40:47,215 INFO L78 Accepts]: Start accepts. Automaton has 10168 states and 45609 transitions. Word has length 30 [2021-06-05 22:40:47,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:47,215 INFO L482 AbstractCegarLoop]: Abstraction has 10168 states and 45609 transitions. [2021-06-05 22:40:47,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:47,216 INFO L276 IsEmpty]: Start isEmpty. Operand 10168 states and 45609 transitions. [2021-06-05 22:40:47,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:40:47,233 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:47,233 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:47,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable766,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:47,434 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:47,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:47,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1718803998, now seen corresponding path program 85 times [2021-06-05 22:40:47,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:47,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8333758] [2021-06-05 22:40:47,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:47,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:47,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:47,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:47,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8333758] [2021-06-05 22:40:47,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8333758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:47,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210892913] [2021-06-05 22:40:47,628 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:47,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:47,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:40:47,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:47,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:40:47,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:40:47,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:40:47,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 22:40:47,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:47,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:47,878 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:47,878 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:11 [2021-06-05 22:40:47,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:47,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210892913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:47,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:47,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 22:40:47,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787125357] [2021-06-05 22:40:47,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:40:47,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:47,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:40:47,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:40:47,921 INFO L87 Difference]: Start difference. First operand 10168 states and 45609 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:49,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:49,258 INFO L93 Difference]: Finished difference Result 10724 states and 47736 transitions. [2021-06-05 22:40:49,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:40:49,258 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:40:49,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:49,282 INFO L225 Difference]: With dead ends: 10724 [2021-06-05 22:40:49,282 INFO L226 Difference]: Without dead ends: 10609 [2021-06-05 22:40:49,282 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 923.3ms TimeCoverageRelationStatistics Valid=212, Invalid=1194, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:40:49,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10609 states. [2021-06-05 22:40:49,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10609 to 10170. [2021-06-05 22:40:49,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10170 states, 10169 states have (on average 4.486085160782771) internal successors, (45619), 10169 states have internal predecessors, (45619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:49,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10170 states to 10170 states and 45619 transitions. [2021-06-05 22:40:49,483 INFO L78 Accepts]: Start accepts. Automaton has 10170 states and 45619 transitions. Word has length 30 [2021-06-05 22:40:49,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:49,483 INFO L482 AbstractCegarLoop]: Abstraction has 10170 states and 45619 transitions. [2021-06-05 22:40:49,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:49,484 INFO L276 IsEmpty]: Start isEmpty. Operand 10170 states and 45619 transitions. [2021-06-05 22:40:49,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:40:49,501 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:49,501 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:49,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable767 [2021-06-05 22:40:49,701 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:49,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:49,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1721578654, now seen corresponding path program 86 times [2021-06-05 22:40:49,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:49,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178161586] [2021-06-05 22:40:49,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:49,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:49,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:49,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:49,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178161586] [2021-06-05 22:40:49,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178161586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:49,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32349321] [2021-06-05 22:40:49,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:49,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:40:49,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:49,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:40:49,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:50,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:40:50,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:40:50,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:40:50,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 22:40:50,153 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:50,168 INFO L628 ElimStorePlain]: treesize reduction 3, result has 89.3 percent of original size [2021-06-05 22:40:50,169 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:50,169 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:14 [2021-06-05 22:40:50,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:50,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32349321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:50,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:50,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 22:40:50,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651657914] [2021-06-05 22:40:50,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:40:50,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:50,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:40:50,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:40:50,231 INFO L87 Difference]: Start difference. First operand 10170 states and 45619 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:51,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:51,760 INFO L93 Difference]: Finished difference Result 10835 states and 48126 transitions. [2021-06-05 22:40:51,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 22:40:51,761 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:40:51,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:51,784 INFO L225 Difference]: With dead ends: 10835 [2021-06-05 22:40:51,785 INFO L226 Difference]: Without dead ends: 10728 [2021-06-05 22:40:51,785 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1119.8ms TimeCoverageRelationStatistics Valid=348, Invalid=1632, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 22:40:51,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10728 states. [2021-06-05 22:40:51,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10728 to 10177. [2021-06-05 22:40:52,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10177 states, 10176 states have (on average 4.484669811320755) internal successors, (45636), 10176 states have internal predecessors, (45636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:52,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10177 states to 10177 states and 45636 transitions. [2021-06-05 22:40:52,030 INFO L78 Accepts]: Start accepts. Automaton has 10177 states and 45636 transitions. Word has length 30 [2021-06-05 22:40:52,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:52,030 INFO L482 AbstractCegarLoop]: Abstraction has 10177 states and 45636 transitions. [2021-06-05 22:40:52,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:52,030 INFO L276 IsEmpty]: Start isEmpty. Operand 10177 states and 45636 transitions. [2021-06-05 22:40:52,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:40:52,047 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:52,047 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:52,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable768,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:52,248 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:52,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:52,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1215232388, now seen corresponding path program 87 times [2021-06-05 22:40:52,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:52,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24597172] [2021-06-05 22:40:52,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:52,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:52,435 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:52,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:52,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24597172] [2021-06-05 22:40:52,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24597172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:52,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226010513] [2021-06-05 22:40:52,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:52,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 22:40:52,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:52,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:40:52,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:52,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:40:52,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:40:52,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:40:52,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 22:40:52,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:52,729 INFO L628 ElimStorePlain]: treesize reduction 3, result has 89.3 percent of original size [2021-06-05 22:40:52,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:52,730 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:14 [2021-06-05 22:40:52,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:52,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226010513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:52,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:52,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 22:40:52,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746610271] [2021-06-05 22:40:52,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 22:40:52,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:52,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 22:40:52,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 22:40:52,794 INFO L87 Difference]: Start difference. First operand 10177 states and 45636 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:53,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:53,968 INFO L93 Difference]: Finished difference Result 10651 states and 47409 transitions. [2021-06-05 22:40:53,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:40:53,968 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:40:53,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:53,992 INFO L225 Difference]: With dead ends: 10651 [2021-06-05 22:40:53,993 INFO L226 Difference]: Without dead ends: 10524 [2021-06-05 22:40:53,993 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 798.0ms TimeCoverageRelationStatistics Valid=190, Invalid=1070, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:40:54,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10524 states. [2021-06-05 22:40:54,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10524 to 10168. [2021-06-05 22:40:54,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10168 states, 10167 states have (on average 4.4860824235270975) internal successors, (45610), 10167 states have internal predecessors, (45610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:54,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10168 states to 10168 states and 45610 transitions. [2021-06-05 22:40:54,192 INFO L78 Accepts]: Start accepts. Automaton has 10168 states and 45610 transitions. Word has length 30 [2021-06-05 22:40:54,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:54,192 INFO L482 AbstractCegarLoop]: Abstraction has 10168 states and 45610 transitions. [2021-06-05 22:40:54,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:54,192 INFO L276 IsEmpty]: Start isEmpty. Operand 10168 states and 45610 transitions. [2021-06-05 22:40:54,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:40:54,210 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:54,210 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:54,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable769 [2021-06-05 22:40:54,410 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:54,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:54,410 INFO L82 PathProgramCache]: Analyzing trace with hash -216230256, now seen corresponding path program 92 times [2021-06-05 22:40:54,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:54,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255613011] [2021-06-05 22:40:54,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:54,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:54,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:54,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:54,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255613011] [2021-06-05 22:40:54,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255613011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:54,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749868831] [2021-06-05 22:40:54,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:54,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:40:54,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:54,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:40:54,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:54,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:40:54,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:40:54,800 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:54,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 31 [2021-06-05 22:40:54,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 22:40:54,842 INFO L628 ElimStorePlain]: treesize reduction 6, result has 88.9 percent of original size [2021-06-05 22:40:54,846 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:54,846 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:61 [2021-06-05 22:40:54,999 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:54,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749868831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:54,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:54,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 22:40:54,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607961470] [2021-06-05 22:40:54,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:40:54,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:54,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:40:54,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:40:54,999 INFO L87 Difference]: Start difference. First operand 10168 states and 45610 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:56,617 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-06-05 22:40:57,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:57,665 INFO L93 Difference]: Finished difference Result 12846 states and 55901 transitions. [2021-06-05 22:40:57,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 22:40:57,666 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:40:57,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:57,695 INFO L225 Difference]: With dead ends: 12846 [2021-06-05 22:40:57,695 INFO L226 Difference]: Without dead ends: 12531 [2021-06-05 22:40:57,696 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1588.0ms TimeCoverageRelationStatistics Valid=349, Invalid=2407, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 22:40:57,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12531 states. [2021-06-05 22:40:57,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12531 to 10321. [2021-06-05 22:40:57,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10321 states, 10320 states have (on average 4.48827519379845) internal successors, (46319), 10320 states have internal predecessors, (46319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:57,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10321 states to 10321 states and 46319 transitions. [2021-06-05 22:40:57,932 INFO L78 Accepts]: Start accepts. Automaton has 10321 states and 46319 transitions. Word has length 30 [2021-06-05 22:40:57,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:40:57,932 INFO L482 AbstractCegarLoop]: Abstraction has 10321 states and 46319 transitions. [2021-06-05 22:40:57,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:57,932 INFO L276 IsEmpty]: Start isEmpty. Operand 10321 states and 46319 transitions. [2021-06-05 22:40:57,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:40:57,950 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:40:57,950 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:40:58,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable770,346 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:58,151 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:40:58,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:40:58,151 INFO L82 PathProgramCache]: Analyzing trace with hash -926529414, now seen corresponding path program 88 times [2021-06-05 22:40:58,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:40:58,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675212003] [2021-06-05 22:40:58,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:40:58,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:40:58,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:58,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:40:58,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675212003] [2021-06-05 22:40:58,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675212003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:58,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209956009] [2021-06-05 22:40:58,328 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:40:58,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:40:58,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:40:58,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:40:58,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:40:58,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:40:58,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:40:58,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:40:58,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-06-05 22:40:58,553 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:40:58,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:40:58,559 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:40:58,559 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:11 [2021-06-05 22:40:58,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:40:58,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209956009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:40:58,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:40:58,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 22:40:58,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659971712] [2021-06-05 22:40:58,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:40:58,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:40:58,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:40:58,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:40:58,589 INFO L87 Difference]: Start difference. First operand 10321 states and 46319 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:40:59,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:40:59,867 INFO L93 Difference]: Finished difference Result 11226 states and 49788 transitions. [2021-06-05 22:40:59,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:40:59,867 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:40:59,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:40:59,893 INFO L225 Difference]: With dead ends: 11226 [2021-06-05 22:40:59,893 INFO L226 Difference]: Without dead ends: 11118 [2021-06-05 22:40:59,893 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 693.4ms TimeCoverageRelationStatistics Valid=116, Invalid=1006, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:40:59,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11118 states. [2021-06-05 22:41:00,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11118 to 10313. [2021-06-05 22:41:00,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10313 states, 10312 states have (on average 4.488460046547711) internal successors, (46285), 10312 states have internal predecessors, (46285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:00,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10313 states to 10313 states and 46285 transitions. [2021-06-05 22:41:00,114 INFO L78 Accepts]: Start accepts. Automaton has 10313 states and 46285 transitions. Word has length 30 [2021-06-05 22:41:00,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:00,115 INFO L482 AbstractCegarLoop]: Abstraction has 10313 states and 46285 transitions. [2021-06-05 22:41:00,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:00,115 INFO L276 IsEmpty]: Start isEmpty. Operand 10313 states and 46285 transitions. [2021-06-05 22:41:00,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:41:00,132 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:00,133 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:00,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable776 [2021-06-05 22:41:00,333 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:00,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:00,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1191371828, now seen corresponding path program 93 times [2021-06-05 22:41:00,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:00,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973140564] [2021-06-05 22:41:00,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:00,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:00,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:00,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:00,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973140564] [2021-06-05 22:41:00,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973140564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:00,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679891581] [2021-06-05 22:41:00,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:00,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:41:00,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:00,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:41:00,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:00,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:41:00,715 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:00,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-06-05 22:41:00,717 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:00,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:00,733 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:00,733 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:40 [2021-06-05 22:41:00,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:00,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679891581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:00,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:00,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 22:41:00,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614142170] [2021-06-05 22:41:00,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:41:00,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:00,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:41:00,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:41:00,894 INFO L87 Difference]: Start difference. First operand 10313 states and 46285 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:03,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:03,861 INFO L93 Difference]: Finished difference Result 12233 states and 53497 transitions. [2021-06-05 22:41:03,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 22:41:03,861 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:41:03,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:03,888 INFO L225 Difference]: With dead ends: 12233 [2021-06-05 22:41:03,888 INFO L226 Difference]: Without dead ends: 12017 [2021-06-05 22:41:03,889 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1126 ImplicationChecksByTransitivity, 1903.5ms TimeCoverageRelationStatistics Valid=495, Invalid=3665, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 22:41:03,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12017 states. [2021-06-05 22:41:04,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12017 to 10323. [2021-06-05 22:41:04,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10323 states, 10322 states have (on average 4.488858748304592) internal successors, (46334), 10322 states have internal predecessors, (46334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:04,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10323 states to 10323 states and 46334 transitions. [2021-06-05 22:41:04,114 INFO L78 Accepts]: Start accepts. Automaton has 10323 states and 46334 transitions. Word has length 30 [2021-06-05 22:41:04,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:04,114 INFO L482 AbstractCegarLoop]: Abstraction has 10323 states and 46334 transitions. [2021-06-05 22:41:04,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:04,114 INFO L276 IsEmpty]: Start isEmpty. Operand 10323 states and 46334 transitions. [2021-06-05 22:41:04,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:41:04,132 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:04,132 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:04,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable777,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:04,332 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:04,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:04,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1504898224, now seen corresponding path program 94 times [2021-06-05 22:41:04,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:04,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876628810] [2021-06-05 22:41:04,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:04,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:04,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:04,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:04,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876628810] [2021-06-05 22:41:04,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876628810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:04,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413052716] [2021-06-05 22:41:04,521 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:04,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:41:04,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:04,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:41:04,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:04,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:04,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:41:04,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:41:04,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 22:41:04,695 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:04,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:04,702 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:04,702 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 22:41:04,764 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:04,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413052716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:04,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:04,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 22:41:04,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234942097] [2021-06-05 22:41:04,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:41:04,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:04,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:41:04,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:41:04,765 INFO L87 Difference]: Start difference. First operand 10323 states and 46334 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:07,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:07,484 INFO L93 Difference]: Finished difference Result 13273 states and 57942 transitions. [2021-06-05 22:41:07,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 22:41:07,484 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:41:07,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:07,515 INFO L225 Difference]: With dead ends: 13273 [2021-06-05 22:41:07,515 INFO L226 Difference]: Without dead ends: 13102 [2021-06-05 22:41:07,516 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1389 ImplicationChecksByTransitivity, 1797.5ms TimeCoverageRelationStatistics Valid=721, Invalid=3971, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 22:41:07,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13102 states. [2021-06-05 22:41:07,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13102 to 10327. [2021-06-05 22:41:07,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10327 states, 10326 states have (on average 4.488766221189231) internal successors, (46351), 10326 states have internal predecessors, (46351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:07,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10327 states to 10327 states and 46351 transitions. [2021-06-05 22:41:07,750 INFO L78 Accepts]: Start accepts. Automaton has 10327 states and 46351 transitions. Word has length 30 [2021-06-05 22:41:07,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:07,751 INFO L482 AbstractCegarLoop]: Abstraction has 10327 states and 46351 transitions. [2021-06-05 22:41:07,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:07,751 INFO L276 IsEmpty]: Start isEmpty. Operand 10327 states and 46351 transitions. [2021-06-05 22:41:07,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:41:07,768 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:07,769 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:07,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 349 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable782 [2021-06-05 22:41:07,969 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:07,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:07,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1930569974, now seen corresponding path program 89 times [2021-06-05 22:41:07,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:07,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965200006] [2021-06-05 22:41:07,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:07,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:08,165 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:08,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:08,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965200006] [2021-06-05 22:41:08,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965200006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:08,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050594177] [2021-06-05 22:41:08,165 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:08,200 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:41:08,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:08,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:41:08,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:08,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:08,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:41:08,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:41:08,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 22:41:08,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:08,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:08,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:08,362 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 22:41:08,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:08,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050594177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:08,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:08,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 22:41:08,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212090297] [2021-06-05 22:41:08,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:41:08,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:08,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:41:08,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:41:08,413 INFO L87 Difference]: Start difference. First operand 10327 states and 46351 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:09,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:09,883 INFO L93 Difference]: Finished difference Result 10927 states and 48707 transitions. [2021-06-05 22:41:09,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 22:41:09,883 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:41:09,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:09,907 INFO L225 Difference]: With dead ends: 10927 [2021-06-05 22:41:09,908 INFO L226 Difference]: Without dead ends: 10838 [2021-06-05 22:41:09,908 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 896.8ms TimeCoverageRelationStatistics Valid=157, Invalid=1175, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:41:09,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10838 states. [2021-06-05 22:41:10,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10838 to 10336. [2021-06-05 22:41:10,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10336 states, 10335 states have (on average 4.489598451862602) internal successors, (46400), 10335 states have internal predecessors, (46400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:10,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10336 states to 10336 states and 46400 transitions. [2021-06-05 22:41:10,120 INFO L78 Accepts]: Start accepts. Automaton has 10336 states and 46400 transitions. Word has length 30 [2021-06-05 22:41:10,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:10,120 INFO L482 AbstractCegarLoop]: Abstraction has 10336 states and 46400 transitions. [2021-06-05 22:41:10,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:10,120 INFO L276 IsEmpty]: Start isEmpty. Operand 10336 states and 46400 transitions. [2021-06-05 22:41:10,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:41:10,139 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:10,139 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:10,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable783 [2021-06-05 22:41:10,340 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:10,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:10,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1758367826, now seen corresponding path program 90 times [2021-06-05 22:41:10,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:10,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459773369] [2021-06-05 22:41:10,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:10,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:10,491 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:10,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:10,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459773369] [2021-06-05 22:41:10,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459773369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:10,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872938194] [2021-06-05 22:41:10,491 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:10,525 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 22:41:10,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:10,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:41:10,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:10,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:41:10,673 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:10,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-06-05 22:41:10,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:10,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:10,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:10,691 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:40 [2021-06-05 22:41:10,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:10,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872938194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:10,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:10,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 22:41:10,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458803797] [2021-06-05 22:41:10,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:41:10,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:10,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:41:10,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:41:10,773 INFO L87 Difference]: Start difference. First operand 10336 states and 46400 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:12,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:12,396 INFO L93 Difference]: Finished difference Result 12684 states and 55270 transitions. [2021-06-05 22:41:12,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 22:41:12,396 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:41:12,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:12,425 INFO L225 Difference]: With dead ends: 12684 [2021-06-05 22:41:12,425 INFO L226 Difference]: Without dead ends: 12533 [2021-06-05 22:41:12,426 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1048.1ms TimeCoverageRelationStatistics Valid=354, Invalid=1902, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 22:41:12,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12533 states. [2021-06-05 22:41:12,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12533 to 10332. [2021-06-05 22:41:12,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10332 states, 10331 states have (on average 4.490078404801084) internal successors, (46387), 10331 states have internal predecessors, (46387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:12,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10332 states to 10332 states and 46387 transitions. [2021-06-05 22:41:12,680 INFO L78 Accepts]: Start accepts. Automaton has 10332 states and 46387 transitions. Word has length 30 [2021-06-05 22:41:12,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:12,680 INFO L482 AbstractCegarLoop]: Abstraction has 10332 states and 46387 transitions. [2021-06-05 22:41:12,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:12,680 INFO L276 IsEmpty]: Start isEmpty. Operand 10332 states and 46387 transitions. [2021-06-05 22:41:12,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:41:12,698 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:12,698 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:12,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable784 [2021-06-05 22:41:12,899 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:12,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:12,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1322558186, now seen corresponding path program 95 times [2021-06-05 22:41:12,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:12,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152149236] [2021-06-05 22:41:12,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:12,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:13,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:13,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:13,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152149236] [2021-06-05 22:41:13,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152149236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:13,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563536606] [2021-06-05 22:41:13,071 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:13,105 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:41:13,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:13,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:41:13,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:13,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:13,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:41:13,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:41:13,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-06-05 22:41:13,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:13,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:13,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:13,298 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:11 [2021-06-05 22:41:13,327 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:13,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563536606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:13,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:13,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 22:41:13,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769855500] [2021-06-05 22:41:13,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:41:13,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:13,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:41:13,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:41:13,328 INFO L87 Difference]: Start difference. First operand 10332 states and 46387 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:14,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:14,452 INFO L93 Difference]: Finished difference Result 11250 states and 49896 transitions. [2021-06-05 22:41:14,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:41:14,452 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:41:14,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:14,476 INFO L225 Difference]: With dead ends: 11250 [2021-06-05 22:41:14,477 INFO L226 Difference]: Without dead ends: 11142 [2021-06-05 22:41:14,477 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 642.1ms TimeCoverageRelationStatistics Valid=113, Invalid=943, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:41:14,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11142 states. [2021-06-05 22:41:14,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11142 to 10350. [2021-06-05 22:41:14,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10350 states, 10349 states have (on average 4.489805778336071) internal successors, (46465), 10349 states have internal predecessors, (46465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:14,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10350 states to 10350 states and 46465 transitions. [2021-06-05 22:41:14,691 INFO L78 Accepts]: Start accepts. Automaton has 10350 states and 46465 transitions. Word has length 30 [2021-06-05 22:41:14,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:14,691 INFO L482 AbstractCegarLoop]: Abstraction has 10350 states and 46465 transitions. [2021-06-05 22:41:14,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:14,691 INFO L276 IsEmpty]: Start isEmpty. Operand 10350 states and 46465 transitions. [2021-06-05 22:41:14,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:41:14,709 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:14,709 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:14,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable788,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:14,909 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:14,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:14,910 INFO L82 PathProgramCache]: Analyzing trace with hash 612259028, now seen corresponding path program 91 times [2021-06-05 22:41:14,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:14,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960707289] [2021-06-05 22:41:14,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:14,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:15,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:15,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:15,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960707289] [2021-06-05 22:41:15,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960707289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:15,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132371949] [2021-06-05 22:41:15,118 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:15,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:15,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:41:15,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:15,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:15,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:41:15,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:41:15,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-06-05 22:41:15,322 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:15,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:15,328 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:15,328 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:11 [2021-06-05 22:41:15,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:15,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132371949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:15,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:15,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 22:41:15,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994191225] [2021-06-05 22:41:15,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:41:15,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:15,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:41:15,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:41:15,357 INFO L87 Difference]: Start difference. First operand 10350 states and 46465 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:16,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:16,796 INFO L93 Difference]: Finished difference Result 11386 states and 50407 transitions. [2021-06-05 22:41:16,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:41:16,796 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:41:16,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:16,821 INFO L225 Difference]: With dead ends: 11386 [2021-06-05 22:41:16,821 INFO L226 Difference]: Without dead ends: 11278 [2021-06-05 22:41:16,821 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 846.9ms TimeCoverageRelationStatistics Valid=188, Invalid=1144, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:41:16,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11278 states. [2021-06-05 22:41:16,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11278 to 10342. [2021-06-05 22:41:17,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10342 states, 10341 states have (on average 4.489411082100377) internal successors, (46425), 10341 states have internal predecessors, (46425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:17,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10342 states to 10342 states and 46425 transitions. [2021-06-05 22:41:17,040 INFO L78 Accepts]: Start accepts. Automaton has 10342 states and 46425 transitions. Word has length 30 [2021-06-05 22:41:17,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:17,040 INFO L482 AbstractCegarLoop]: Abstraction has 10342 states and 46425 transitions. [2021-06-05 22:41:17,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:17,040 INFO L276 IsEmpty]: Start isEmpty. Operand 10342 states and 46425 transitions. [2021-06-05 22:41:17,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:41:17,058 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:17,058 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:17,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable789 [2021-06-05 22:41:17,259 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:17,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:17,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1832674602, now seen corresponding path program 96 times [2021-06-05 22:41:17,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:17,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967621762] [2021-06-05 22:41:17,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:17,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:17,455 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:17,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:17,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967621762] [2021-06-05 22:41:17,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967621762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:17,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298531721] [2021-06-05 22:41:17,456 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:17,491 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:41:17,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:17,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:41:17,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:17,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:17,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:41:17,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:41:17,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 22:41:17,647 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:17,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:17,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:17,654 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 22:41:17,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:17,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298531721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:17,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:17,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-06-05 22:41:17,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350977894] [2021-06-05 22:41:17,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:41:17,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:17,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:41:17,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:41:17,685 INFO L87 Difference]: Start difference. First operand 10342 states and 46425 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:18,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:18,649 INFO L93 Difference]: Finished difference Result 11031 states and 49099 transitions. [2021-06-05 22:41:18,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:41:18,649 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:41:18,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:18,674 INFO L225 Difference]: With dead ends: 11031 [2021-06-05 22:41:18,674 INFO L226 Difference]: Without dead ends: 10926 [2021-06-05 22:41:18,674 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 665.6ms TimeCoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:41:18,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10926 states. [2021-06-05 22:41:18,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10926 to 10348. [2021-06-05 22:41:18,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10348 states, 10347 states have (on average 4.489127283270514) internal successors, (46449), 10347 states have internal predecessors, (46449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:18,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10348 states to 10348 states and 46449 transitions. [2021-06-05 22:41:18,878 INFO L78 Accepts]: Start accepts. Automaton has 10348 states and 46449 transitions. Word has length 30 [2021-06-05 22:41:18,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:18,879 INFO L482 AbstractCegarLoop]: Abstraction has 10348 states and 46449 transitions. [2021-06-05 22:41:18,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:18,879 INFO L276 IsEmpty]: Start isEmpty. Operand 10348 states and 46449 transitions. [2021-06-05 22:41:18,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:41:18,896 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:18,896 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:19,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable790,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:19,097 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:19,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:19,097 INFO L82 PathProgramCache]: Analyzing trace with hash 849814126, now seen corresponding path program 97 times [2021-06-05 22:41:19,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:19,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641343938] [2021-06-05 22:41:19,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:19,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:19,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:19,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:19,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641343938] [2021-06-05 22:41:19,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641343938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:19,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730863169] [2021-06-05 22:41:19,286 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:19,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:19,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:41:19,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:19,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:19,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:41:19,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:41:19,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 22:41:19,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:19,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:19,484 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:19,484 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:10 [2021-06-05 22:41:19,514 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:19,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730863169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:19,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:19,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-06-05 22:41:19,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747437630] [2021-06-05 22:41:19,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 22:41:19,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:19,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 22:41:19,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 22:41:19,515 INFO L87 Difference]: Start difference. First operand 10348 states and 46449 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:20,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:20,581 INFO L93 Difference]: Finished difference Result 11031 states and 49085 transitions. [2021-06-05 22:41:20,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:41:20,582 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:41:20,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:20,605 INFO L225 Difference]: With dead ends: 11031 [2021-06-05 22:41:20,606 INFO L226 Difference]: Without dead ends: 10934 [2021-06-05 22:41:20,606 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 652.2ms TimeCoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:41:20,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10934 states. [2021-06-05 22:41:20,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10934 to 10343. [2021-06-05 22:41:20,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10343 states, 10342 states have (on average 4.489073680139238) internal successors, (46426), 10342 states have internal predecessors, (46426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:20,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10343 states to 10343 states and 46426 transitions. [2021-06-05 22:41:20,810 INFO L78 Accepts]: Start accepts. Automaton has 10343 states and 46426 transitions. Word has length 30 [2021-06-05 22:41:20,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:20,810 INFO L482 AbstractCegarLoop]: Abstraction has 10343 states and 46426 transitions. [2021-06-05 22:41:20,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:20,810 INFO L276 IsEmpty]: Start isEmpty. Operand 10343 states and 46426 transitions. [2021-06-05 22:41:20,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:41:20,827 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:20,827 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:21,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable791,355 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:21,028 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:21,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:21,028 INFO L82 PathProgramCache]: Analyzing trace with hash -7297126, now seen corresponding path program 92 times [2021-06-05 22:41:21,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:21,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566967771] [2021-06-05 22:41:21,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:21,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:21,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:21,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:21,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566967771] [2021-06-05 22:41:21,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566967771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:21,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903221271] [2021-06-05 22:41:21,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:21,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:41:21,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:21,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:41:21,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:21,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:41:21,413 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:21,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-06-05 22:41:21,415 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:21,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:21,431 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:21,431 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:40 [2021-06-05 22:41:21,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:21,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903221271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:21,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:21,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 22:41:21,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680890348] [2021-06-05 22:41:21,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 22:41:21,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:21,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 22:41:21,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-05 22:41:21,558 INFO L87 Difference]: Start difference. First operand 10343 states and 46426 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:24,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:24,395 INFO L93 Difference]: Finished difference Result 13074 states and 56990 transitions. [2021-06-05 22:41:24,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 22:41:24,395 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:41:24,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:24,425 INFO L225 Difference]: With dead ends: 13074 [2021-06-05 22:41:24,425 INFO L226 Difference]: Without dead ends: 12890 [2021-06-05 22:41:24,425 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 1952.7ms TimeCoverageRelationStatistics Valid=547, Invalid=3359, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 22:41:24,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12890 states. [2021-06-05 22:41:24,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12890 to 10357. [2021-06-05 22:41:24,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10357 states, 10356 states have (on average 4.489667825415218) internal successors, (46495), 10356 states have internal predecessors, (46495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:24,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10357 states to 10357 states and 46495 transitions. [2021-06-05 22:41:24,761 INFO L78 Accepts]: Start accepts. Automaton has 10357 states and 46495 transitions. Word has length 30 [2021-06-05 22:41:24,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:24,761 INFO L482 AbstractCegarLoop]: Abstraction has 10357 states and 46495 transitions. [2021-06-05 22:41:24,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:24,761 INFO L276 IsEmpty]: Start isEmpty. Operand 10357 states and 46495 transitions. [2021-06-05 22:41:24,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:41:24,779 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:24,779 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:24,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable792,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:24,979 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:24,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:24,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1758731406, now seen corresponding path program 93 times [2021-06-05 22:41:24,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:24,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805189830] [2021-06-05 22:41:24,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:24,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:25,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:25,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:25,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805189830] [2021-06-05 22:41:25,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805189830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:25,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169438740] [2021-06-05 22:41:25,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:25,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:41:25,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:25,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:41:25,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:25,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:25,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:41:25,348 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:25,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 34 [2021-06-05 22:41:25,350 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:25,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:25,384 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:25,384 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:92 [2021-06-05 22:41:25,541 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:25,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169438740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:25,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:25,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 22:41:25,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785734801] [2021-06-05 22:41:25,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:41:25,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:25,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:41:25,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:41:25,542 INFO L87 Difference]: Start difference. First operand 10357 states and 46495 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:29,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:29,208 INFO L93 Difference]: Finished difference Result 13477 states and 58270 transitions. [2021-06-05 22:41:29,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 22:41:29,208 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:41:29,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:29,238 INFO L225 Difference]: With dead ends: 13477 [2021-06-05 22:41:29,238 INFO L226 Difference]: Without dead ends: 13194 [2021-06-05 22:41:29,239 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1262 ImplicationChecksByTransitivity, 2547.8ms TimeCoverageRelationStatistics Valid=622, Invalid=4070, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 22:41:29,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13194 states. [2021-06-05 22:41:29,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13194 to 10349. [2021-06-05 22:41:29,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10349 states, 10348 states have (on average 4.488693467336684) internal successors, (46449), 10348 states have internal predecessors, (46449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:29,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10349 states to 10349 states and 46449 transitions. [2021-06-05 22:41:29,473 INFO L78 Accepts]: Start accepts. Automaton has 10349 states and 46449 transitions. Word has length 30 [2021-06-05 22:41:29,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:29,473 INFO L482 AbstractCegarLoop]: Abstraction has 10349 states and 46449 transitions. [2021-06-05 22:41:29,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:29,473 INFO L276 IsEmpty]: Start isEmpty. Operand 10349 states and 46449 transitions. [2021-06-05 22:41:29,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:41:29,576 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:29,576 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:29,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable797 [2021-06-05 22:41:29,777 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:29,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:29,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1275770602, now seen corresponding path program 98 times [2021-06-05 22:41:29,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:29,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753722199] [2021-06-05 22:41:29,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:29,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:29,976 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:29,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:29,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753722199] [2021-06-05 22:41:29,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753722199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:29,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323945006] [2021-06-05 22:41:29,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:30,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:41:30,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:30,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:41:30,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:30,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:41:30,146 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:30,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-06-05 22:41:30,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:30,163 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:30,165 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:30,165 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:43 [2021-06-05 22:41:30,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:30,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323945006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:30,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:30,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 22:41:30,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744869013] [2021-06-05 22:41:30,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:41:30,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:30,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:41:30,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:41:30,363 INFO L87 Difference]: Start difference. First operand 10349 states and 46449 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:33,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:33,308 INFO L93 Difference]: Finished difference Result 11750 states and 51689 transitions. [2021-06-05 22:41:33,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 22:41:33,308 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:41:33,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:33,333 INFO L225 Difference]: With dead ends: 11750 [2021-06-05 22:41:33,334 INFO L226 Difference]: Without dead ends: 11542 [2021-06-05 22:41:33,334 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 2035.2ms TimeCoverageRelationStatistics Valid=350, Invalid=2842, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 22:41:33,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11542 states. [2021-06-05 22:41:33,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11542 to 10363. [2021-06-05 22:41:33,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10363 states, 10362 states have (on average 4.488998262883613) internal successors, (46515), 10362 states have internal predecessors, (46515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:33,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10363 states to 10363 states and 46515 transitions. [2021-06-05 22:41:33,550 INFO L78 Accepts]: Start accepts. Automaton has 10363 states and 46515 transitions. Word has length 30 [2021-06-05 22:41:33,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:33,550 INFO L482 AbstractCegarLoop]: Abstraction has 10363 states and 46515 transitions. [2021-06-05 22:41:33,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:33,551 INFO L276 IsEmpty]: Start isEmpty. Operand 10363 states and 46515 transitions. [2021-06-05 22:41:33,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:41:33,568 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:33,568 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:33,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable804,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:33,769 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:33,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:33,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1589296998, now seen corresponding path program 99 times [2021-06-05 22:41:33,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:33,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570185806] [2021-06-05 22:41:33,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:33,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:33,971 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:33,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:33,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570185806] [2021-06-05 22:41:33,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570185806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:33,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024159302] [2021-06-05 22:41:33,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:34,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:41:34,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:34,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 22:41:34,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:34,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:41:34,135 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:34,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-06-05 22:41:34,137 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:41:34,152 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:34,154 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:41:34,154 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:43 [2021-06-05 22:41:34,342 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:34,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024159302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:34,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:41:34,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 22:41:34,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597948791] [2021-06-05 22:41:34,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:41:34,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:41:34,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:41:34,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:41:34,343 INFO L87 Difference]: Start difference. First operand 10363 states and 46515 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:34,720 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2021-06-05 22:41:37,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:41:37,744 INFO L93 Difference]: Finished difference Result 11941 states and 52660 transitions. [2021-06-05 22:41:37,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 22:41:37,744 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:41:37,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:41:37,770 INFO L225 Difference]: With dead ends: 11941 [2021-06-05 22:41:37,770 INFO L226 Difference]: Without dead ends: 11717 [2021-06-05 22:41:37,771 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 2517.7ms TimeCoverageRelationStatistics Valid=498, Invalid=3662, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 22:41:37,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11717 states. [2021-06-05 22:41:37,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11717 to 10358. [2021-06-05 22:41:37,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10358 states, 10357 states have (on average 4.489041228154871) internal successors, (46493), 10357 states have internal predecessors, (46493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:37,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10358 states to 10358 states and 46493 transitions. [2021-06-05 22:41:37,988 INFO L78 Accepts]: Start accepts. Automaton has 10358 states and 46493 transitions. Word has length 30 [2021-06-05 22:41:37,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:41:37,988 INFO L482 AbstractCegarLoop]: Abstraction has 10358 states and 46493 transitions. [2021-06-05 22:41:37,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:41:37,988 INFO L276 IsEmpty]: Start isEmpty. Operand 10358 states and 46493 transitions. [2021-06-05 22:41:38,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:41:38,007 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:41:38,007 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:41:38,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable809 [2021-06-05 22:41:38,208 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr9INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:41:38,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:41:38,208 INFO L82 PathProgramCache]: Analyzing trace with hash 20793724, now seen corresponding path program 100 times [2021-06-05 22:41:38,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:41:38,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592418285] [2021-06-05 22:41:38,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:41:38,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:41:38,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:41:38,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:41:38,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592418285] [2021-06-05 22:41:38,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592418285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:41:38,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928428838] [2021-06-05 22:41:38,442 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:38,476 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:41:38,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:41:38,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 22:41:38,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:41:38,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:41:38,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:41:38,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:41:38,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-06-05 22:41:38,608 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. Received shutdown request... [2021-06-05 22:41:38,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:41:38,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable814,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:41:38,820 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 22:41:38,820 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was TIMEOUT (5/5) [2021-06-05 22:41:38,821 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 22:41:38,822 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 22:41:38,823 INFO L202 PluginConnector]: Adding new model parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 10:41:38 BasicIcfg [2021-06-05 22:41:38,823 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 22:41:38,823 INFO L168 Benchmark]: Toolchain (without parser) took 776519.37 ms. Allocated memory was 346.0 MB in the beginning and 2.2 GB in the end (delta: 1.8 GB). Free memory was 325.3 MB in the beginning and 991.1 MB in the end (delta: -665.8 MB). Peak memory consumption was 1.2 GB. Max. memory is 16.0 GB. [2021-06-05 22:41:38,823 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 346.0 MB. Free memory was 326.5 MB in the beginning and 326.4 MB in the end (delta: 69.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 22:41:38,823 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.77 ms. Allocated memory is still 346.0 MB. Free memory was 325.2 MB in the beginning and 323.7 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 22:41:38,823 INFO L168 Benchmark]: Boogie Preprocessor took 19.39 ms. Allocated memory is still 346.0 MB. Free memory was 323.7 MB in the beginning and 322.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 22:41:38,823 INFO L168 Benchmark]: RCFGBuilder took 351.45 ms. Allocated memory is still 346.0 MB. Free memory was 322.6 MB in the beginning and 304.7 MB in the end (delta: 17.9 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. [2021-06-05 22:41:38,824 INFO L168 Benchmark]: TraceAbstraction took 776110.84 ms. Allocated memory was 346.0 MB in the beginning and 2.2 GB in the end (delta: 1.8 GB). Free memory was 330.5 MB in the beginning and 991.1 MB in the end (delta: -660.6 MB). Peak memory consumption was 1.2 GB. Max. memory is 16.0 GB. [2021-06-05 22:41:38,824 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 346.0 MB. Free memory was 326.5 MB in the beginning and 326.4 MB in the end (delta: 69.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 23.77 ms. Allocated memory is still 346.0 MB. Free memory was 325.2 MB in the beginning and 323.7 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 19.39 ms. Allocated memory is still 346.0 MB. Free memory was 323.7 MB in the beginning and 322.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 351.45 ms. Allocated memory is still 346.0 MB. Free memory was 322.6 MB in the beginning and 304.7 MB in the end (delta: 17.9 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. * TraceAbstraction took 776110.84 ms. Allocated memory was 346.0 MB in the beginning and 2.2 GB in the end (delta: 1.8 GB). Free memory was 330.5 MB in the beginning and 991.1 MB in the end (delta: -660.6 MB). Peak memory consumption was 1.2 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 110]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations,while ExplicitLhsPolynomialRelations was build 0 of 1 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: thread4Thread1of1ForFork1 with 1 thread instances CFG has 13 procedures, 71 locations, 11 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 92.4ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 23.2ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 63.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=405occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: thread1 with 1 thread instances CFG has 13 procedures, 71 locations, 11 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 19.8ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 2.3ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 16.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=405occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: thread4 with 1 thread instances CFG has 13 procedures, 71 locations, 11 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 24.7ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 2.9ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 20.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=405occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: thread1Thread1of1ForFork0 with 1 thread instances CFG has 13 procedures, 71 locations, 11 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 22.2ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 2.4ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 18.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=405occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 13 procedures, 71 locations, 11 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 775727.4ms, OverallIterations: 372, TraceHistogramMax: 2, EmptinessCheckTime: 3375.9ms, AutomataDifference: 509455.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 16.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 40355 SDtfs, 106169 SDslu, 369592 SDs, 0 SdLazy, 418530 SolverSat, 42197 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 181154.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22092 GetRequests, 7635 SyntacticMatches, 545 SemanticMatches, 13912 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184506 ImplicationChecksByTransitivity, 356883.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=10363occurred in iteration=370, InterpolantAutomatonStates: 12502, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 40034.9ms AutomataMinimizationTime, 371 MinimizatonAttempts, 455853 StatesRemovedByMinimization, 368 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2296.3ms SsaConstructionTime, 5255.6ms SatisfiabilityAnalysisTime, 133292.4ms InterpolantComputationTime, 20988 NumberOfCodeBlocks, 20988 NumberOfCodeBlocksAsserted, 1120 NumberOfCheckSat, 20259 ConstructedInterpolants, 792 QuantifiedInterpolants, 262783 SizeOfPredicates, 2779 NumberOfNonLiveVariables, 45140 ConjunctsInSsa, 9955 ConjunctsInUnsatCore, 729 InterpolantComputations, 13 PerfectInterpolantSequences, 193/3315 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown