/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-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp3x3-opt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 14:14:21,954 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 14:14:21,955 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 14:14:21,980 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 14:14:22,036 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-05 14:14:22,036 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-05 14:14:22,037 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-05 14:14:22,037 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-05 14:14:22,038 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-05 14:14:22,038 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-05 14:14:22,039 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-05 14:14:22,039 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-06-05 14:14:22,039 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 14:14:22,040 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 14:14:22,040 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 14:14:22,043 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-Separate.epf [2021-06-05 14:14:22,072 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 14:14:22,072 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 14:14:22,072 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 14:14:22,073 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 14:14:22,073 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 14:14:22,073 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 14:14:22,074 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 14:14:22,074 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 14:14:22,074 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 14:14:22,074 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 14:14:22,074 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 14:14:22,074 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 14:14:22,074 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 14:14:22,074 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 14:14:22,075 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 14:14:22,075 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 14:14:22,075 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 14:14:22,075 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 14:14:22,075 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 14:14:22,075 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 14:14:22,075 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 14:14:22,075 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 14:14:22,075 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 14:14:22,076 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 14:14:22,076 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 14:14:22,076 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 14:14:22,076 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 14:14:22,076 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 14:14:22,076 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 14:14:22,076 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 14:14:22,076 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 14:14:22,076 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 14:14:22,077 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 14:14:22,311 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 14:14:22,328 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 14:14:22,330 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 14:14:22,331 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 14:14:22,332 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 14:14:22,332 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp3x3-opt.wvr.bpl [2021-06-05 14:14:22,332 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp3x3-opt.wvr.bpl' [2021-06-05 14:14:22,368 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 14:14:22,382 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 14:14:22,384 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 14:14:22,384 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 14:14:22,384 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 14:14:22,393 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:14:22" (1/1) ... [2021-06-05 14:14:22,399 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:14:22" (1/1) ... [2021-06-05 14:14:22,404 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 14:14:22,405 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 14:14:22,406 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 14:14:22,406 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 14:14:22,411 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:14:22" (1/1) ... [2021-06-05 14:14:22,411 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:14:22" (1/1) ... [2021-06-05 14:14:22,417 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:14:22" (1/1) ... [2021-06-05 14:14:22,417 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:14:22" (1/1) ... [2021-06-05 14:14:22,420 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:14:22" (1/1) ... [2021-06-05 14:14:22,422 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:14:22" (1/1) ... [2021-06-05 14:14:22,423 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:14:22" (1/1) ... [2021-06-05 14:14:22,426 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 14:14:22,427 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 14:14:22,427 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 14:14:22,428 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 14:14:22,429 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:14:22" (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 14:14:22,484 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 14:14:22,485 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 14:14:22,485 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 14:14:22,485 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 14:14:22,485 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 14:14:22,485 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 14:14:22,485 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 14:14:22,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 14:14:22,485 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 14:14:22,485 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 14:14:22,486 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 14:14:22,486 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 14:14:22,486 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-06-05 14:14:22,486 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-06-05 14:14:22,487 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-06-05 14:14:22,487 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2021-06-05 14:14:22,487 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2021-06-05 14:14:22,487 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2021-06-05 14:14:22,487 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread6 given in one single declaration [2021-06-05 14:14:22,487 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2021-06-05 14:14:22,488 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2021-06-05 14:14:22,488 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 14:14:22,658 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 14:14:22,658 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-06-05 14:14:22,659 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-06-05 14:14:22,659 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-06-05 14:14:22,659 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-06-05 14:14:22,660 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread4EXIT is neither atomic block end nor error location. [2021-06-05 14:14:22,660 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread5EXIT is neither atomic block end nor error location. [2021-06-05 14:14:22,660 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread6EXIT is neither atomic block end nor error location. [2021-06-05 14:14:22,661 INFO L202 PluginConnector]: Adding new model exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 02:14:22 BoogieIcfgContainer [2021-06-05 14:14:22,661 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 14:14:22,662 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 14:14:22,662 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 14:14:22,664 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 14:14:22,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:14:22" (1/2) ... [2021-06-05 14:14:22,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cf92d96 and model type exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 02:14:22, skipping insertion in model container [2021-06-05 14:14:22,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp3x3-opt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 02:14:22" (2/2) ... [2021-06-05 14:14:22,666 INFO L111 eAbstractionObserver]: Analyzing ICFG exp3x3-opt.wvr.bpl [2021-06-05 14:14:22,670 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 14:14:22,670 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 14:14:22,670 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 14:14:22,670 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 14:14:22,760 INFO L149 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2021-06-05 14:14:22,775 INFO L255 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-06-05 14:14:22,787 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 14:14:22,787 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 14:14:22,787 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 14:14:22,787 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 14:14:22,788 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 14:14:22,788 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 14:14:22,788 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 14:14:22,788 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 14:14:22,794 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 48 places, 35 transitions, 118 flow [2021-06-05 14:14:22,818 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 195 states, 193 states have (on average 5.341968911917099) internal successors, (1031), 194 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:22,820 INFO L276 IsEmpty]: Start isEmpty. Operand has 195 states, 193 states have (on average 5.341968911917099) internal successors, (1031), 194 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:22,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:14:22,831 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:14:22,832 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:14:22,832 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:14:22,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:14:22,836 INFO L82 PathProgramCache]: Analyzing trace with hash 336800480, now seen corresponding path program 1 times [2021-06-05 14:14:22,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:14:22,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427882410] [2021-06-05 14:14:22,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:14:22,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:14:22,940 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 14:14:22,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:14:22,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427882410] [2021-06-05 14:14:22,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427882410] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:14:22,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:14:22,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 14:14:22,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319479248] [2021-06-05 14:14:22,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 14:14:22,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:14:22,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 14:14:22,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 14:14:22,960 INFO L87 Difference]: Start difference. First operand has 195 states, 193 states have (on average 5.341968911917099) internal successors, (1031), 194 states have internal predecessors, (1031), 0 states have call successors, (0), 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 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:23,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:14:23,005 INFO L93 Difference]: Finished difference Result 382 states and 2054 transitions. [2021-06-05 14:14:23,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 14:14:23,013 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:14:23,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:14:23,023 INFO L225 Difference]: With dead ends: 382 [2021-06-05 14:14:23,023 INFO L226 Difference]: Without dead ends: 304 [2021-06-05 14:14:23,024 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 14:14:23,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-06-05 14:14:23,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 304. [2021-06-05 14:14:23,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 5.458745874587459) internal successors, (1654), 303 states have internal predecessors, (1654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:23,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 1654 transitions. [2021-06-05 14:14:23,084 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 1654 transitions. Word has length 21 [2021-06-05 14:14:23,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:14:23,085 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 1654 transitions. [2021-06-05 14:14:23,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:23,085 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 1654 transitions. [2021-06-05 14:14:23,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 14:14:23,087 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:14:23,088 INFO L521 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 14:14:23,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 14:14:23,088 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:14:23,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:14:23,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1957873019, now seen corresponding path program 1 times [2021-06-05 14:14:23,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:14:23,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408681756] [2021-06-05 14:14:23,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:14:23,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:14:23,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:14:23,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:14:23,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408681756] [2021-06-05 14:14:23,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408681756] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:14:23,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:14:23,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 14:14:23,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122424203] [2021-06-05 14:14:23,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 14:14:23,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:14:23,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 14:14:23,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 14:14:23,149 INFO L87 Difference]: Start difference. First operand 304 states and 1654 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 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 14:14:23,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:14:23,164 INFO L93 Difference]: Finished difference Result 551 states and 3079 transitions. [2021-06-05 14:14:23,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 14:14:23,165 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 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 14:14:23,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:14:23,169 INFO L225 Difference]: With dead ends: 551 [2021-06-05 14:14:23,169 INFO L226 Difference]: Without dead ends: 502 [2021-06-05 14:14:23,170 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 14:14:23,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-06-05 14:14:23,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 502. [2021-06-05 14:14:23,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 5.598802395209581) internal successors, (2805), 501 states have internal predecessors, (2805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:23,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 2805 transitions. [2021-06-05 14:14:23,202 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 2805 transitions. Word has length 22 [2021-06-05 14:14:23,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:14:23,203 INFO L482 AbstractCegarLoop]: Abstraction has 502 states and 2805 transitions. [2021-06-05 14:14:23,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 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 14:14:23,203 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 2805 transitions. [2021-06-05 14:14:23,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:14:23,207 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:14:23,207 INFO L521 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] [2021-06-05 14:14:23,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 14:14:23,207 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:14:23,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:14:23,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1560108314, now seen corresponding path program 1 times [2021-06-05 14:14:23,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:14:23,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800770635] [2021-06-05 14:14:23,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:14:23,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:14:23,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:14:23,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:14:23,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800770635] [2021-06-05 14:14:23,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800770635] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:14:23,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:14:23,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 14:14:23,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412262687] [2021-06-05 14:14:23,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 14:14:23,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:14:23,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 14:14:23,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 14:14:23,261 INFO L87 Difference]: Start difference. First operand 502 states and 2805 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:23,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:14:23,279 INFO L93 Difference]: Finished difference Result 989 states and 5577 transitions. [2021-06-05 14:14:23,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 14:14:23,279 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 14:14:23,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:14:23,286 INFO L225 Difference]: With dead ends: 989 [2021-06-05 14:14:23,286 INFO L226 Difference]: Without dead ends: 859 [2021-06-05 14:14:23,286 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 14:14:23,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2021-06-05 14:14:23,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 859. [2021-06-05 14:14:23,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 858 states have (on average 5.6678321678321675) internal successors, (4863), 858 states have internal predecessors, (4863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:23,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 4863 transitions. [2021-06-05 14:14:23,316 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 4863 transitions. Word has length 23 [2021-06-05 14:14:23,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:14:23,316 INFO L482 AbstractCegarLoop]: Abstraction has 859 states and 4863 transitions. [2021-06-05 14:14:23,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:23,316 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 4863 transitions. [2021-06-05 14:14:23,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:14:23,320 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:14:23,320 INFO L521 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 14:14:23,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 14:14:23,320 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:14:23,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:14:23,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1404106583, now seen corresponding path program 1 times [2021-06-05 14:14:23,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:14:23,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266394911] [2021-06-05 14:14:23,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:14:23,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:14:23,369 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:14:23,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:14:23,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266394911] [2021-06-05 14:14:23,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266394911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:23,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002640991] [2021-06-05 14:14:23,371 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 14:14:23,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:14:23,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 14:14:23,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:14:23,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:14:23,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002640991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:23,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:14:23,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-06-05 14:14:23,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253791614] [2021-06-05 14:14:23,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 14:14:23,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:14:23,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 14:14:23,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:14:23,578 INFO L87 Difference]: Start difference. First operand 859 states and 4863 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 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 14:14:23,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:14:23,693 INFO L93 Difference]: Finished difference Result 2168 states and 12284 transitions. [2021-06-05 14:14:23,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:14:23,694 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 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 24 [2021-06-05 14:14:23,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:14:23,701 INFO L225 Difference]: With dead ends: 2168 [2021-06-05 14:14:23,701 INFO L226 Difference]: Without dead ends: 1000 [2021-06-05 14:14:23,701 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 37.5ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:14:23,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1000 states. [2021-06-05 14:14:23,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1000 to 614. [2021-06-05 14:14:23,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 613 states have (on average 5.634584013050571) internal successors, (3454), 613 states have internal predecessors, (3454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:23,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 3454 transitions. [2021-06-05 14:14:23,727 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 3454 transitions. Word has length 24 [2021-06-05 14:14:23,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:14:23,727 INFO L482 AbstractCegarLoop]: Abstraction has 614 states and 3454 transitions. [2021-06-05 14:14:23,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 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 14:14:23,728 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 3454 transitions. [2021-06-05 14:14:23,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 14:14:23,730 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:14:23,730 INFO L521 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 14:14:23,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:14:23,945 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:14:23,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:14:23,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1358128455, now seen corresponding path program 1 times [2021-06-05 14:14:23,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:14:23,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282712812] [2021-06-05 14:14:23,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:14:23,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:14:23,987 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:14:23,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:14:23,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282712812] [2021-06-05 14:14:23,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282712812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:23,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421020195] [2021-06-05 14:14:23,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 14:14:24,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:14:24,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 14:14:24,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:14:24,109 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:14:24,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421020195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:24,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:14:24,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-06-05 14:14:24,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297869860] [2021-06-05 14:14:24,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 14:14:24,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:14:24,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 14:14:24,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:14:24,111 INFO L87 Difference]: Start difference. First operand 614 states and 3454 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 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 14:14:24,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:14:24,203 INFO L93 Difference]: Finished difference Result 1659 states and 9450 transitions. [2021-06-05 14:14:24,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:14:24,204 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 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 24 [2021-06-05 14:14:24,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:14:24,210 INFO L225 Difference]: With dead ends: 1659 [2021-06-05 14:14:24,211 INFO L226 Difference]: Without dead ends: 930 [2021-06-05 14:14:24,211 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 33.7ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:14:24,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-06-05 14:14:24,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 760. [2021-06-05 14:14:24,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 759 states have (on average 5.664031620553359) internal successors, (4299), 759 states have internal predecessors, (4299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:24,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 4299 transitions. [2021-06-05 14:14:24,238 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 4299 transitions. Word has length 24 [2021-06-05 14:14:24,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:14:24,238 INFO L482 AbstractCegarLoop]: Abstraction has 760 states and 4299 transitions. [2021-06-05 14:14:24,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 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 14:14:24,239 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 4299 transitions. [2021-06-05 14:14:24,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:14:24,244 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:14:24,245 INFO L521 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] [2021-06-05 14:14:24,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:14:24,463 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:14:24,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:14:24,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1283985542, now seen corresponding path program 1 times [2021-06-05 14:14:24,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:14:24,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316689969] [2021-06-05 14:14:24,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:14:24,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:14:24,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:14:24,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:14:24,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316689969] [2021-06-05 14:14:24,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316689969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:24,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026566303] [2021-06-05 14:14:24,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 14:14:24,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:14:24,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 14:14:24,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:14:24,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 14:14:24,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026566303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:24,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:14:24,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-06-05 14:14:24,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261121998] [2021-06-05 14:14:24,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 14:14:24,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:14:24,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 14:14:24,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:14:24,602 INFO L87 Difference]: Start difference. First operand 760 states and 4299 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 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 14:14:24,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:14:24,711 INFO L93 Difference]: Finished difference Result 2539 states and 14502 transitions. [2021-06-05 14:14:24,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:14:24,712 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 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 25 [2021-06-05 14:14:24,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:14:24,722 INFO L225 Difference]: With dead ends: 2539 [2021-06-05 14:14:24,722 INFO L226 Difference]: Without dead ends: 1460 [2021-06-05 14:14:24,723 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 31.0ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:14:24,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2021-06-05 14:14:24,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1460. [2021-06-05 14:14:24,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1460 states, 1459 states have (on average 5.748457847840987) internal successors, (8387), 1459 states have internal predecessors, (8387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:24,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 8387 transitions. [2021-06-05 14:14:24,765 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 8387 transitions. Word has length 25 [2021-06-05 14:14:24,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:14:24,766 INFO L482 AbstractCegarLoop]: Abstraction has 1460 states and 8387 transitions. [2021-06-05 14:14:24,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 5 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 14:14:24,767 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 8387 transitions. [2021-06-05 14:14:24,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 14:14:24,772 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:14:24,772 INFO L521 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] [2021-06-05 14:14:24,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:14:24,993 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:14:24,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:14:24,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1790951632, now seen corresponding path program 1 times [2021-06-05 14:14:24,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:14:24,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698314227] [2021-06-05 14:14:24,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:14:25,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:14:25,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 14:14:25,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:14:25,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698314227] [2021-06-05 14:14:25,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698314227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:25,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457964178] [2021-06-05 14:14:25,043 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 14:14:25,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:14:25,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:14:25,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:14:25,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 14:14:25,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457964178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:25,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:14:25,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 6 [2021-06-05 14:14:25,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461563955] [2021-06-05 14:14:25,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:14:25,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:14:25,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:14:25,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:14:25,180 INFO L87 Difference]: Start difference. First operand 1460 states and 8387 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:25,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:14:25,329 INFO L93 Difference]: Finished difference Result 7036 states and 40197 transitions. [2021-06-05 14:14:25,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:14:25,329 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 14:14:25,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:14:25,366 INFO L225 Difference]: With dead ends: 7036 [2021-06-05 14:14:25,366 INFO L226 Difference]: Without dead ends: 5971 [2021-06-05 14:14:25,367 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 64.1ms TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:14:25,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5971 states. [2021-06-05 14:14:25,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5971 to 3455. [2021-06-05 14:14:25,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3455 states, 3454 states have (on average 6.335552982049798) internal successors, (21883), 3454 states have internal predecessors, (21883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:25,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3455 states to 3455 states and 21883 transitions. [2021-06-05 14:14:25,595 INFO L78 Accepts]: Start accepts. Automaton has 3455 states and 21883 transitions. Word has length 27 [2021-06-05 14:14:25,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:14:25,595 INFO L482 AbstractCegarLoop]: Abstraction has 3455 states and 21883 transitions. [2021-06-05 14:14:25,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:25,595 INFO L276 IsEmpty]: Start isEmpty. Operand 3455 states and 21883 transitions. [2021-06-05 14:14:25,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 14:14:25,606 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:14:25,607 INFO L521 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] [2021-06-05 14:14:25,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:14:25,809 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:14:25,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:14:25,809 INFO L82 PathProgramCache]: Analyzing trace with hash -97672488, now seen corresponding path program 2 times [2021-06-05 14:14:25,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:14:25,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781932100] [2021-06-05 14:14:25,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:14:25,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:14:25,850 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 14:14:25,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:14:25,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781932100] [2021-06-05 14:14:25,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781932100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:25,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458132092] [2021-06-05 14:14:25,851 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 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 14:14:25,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:14:25,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:14:25,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:14:25,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:14:25,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 14:14:25,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458132092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:25,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:14:25,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 6 [2021-06-05 14:14:25,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70941649] [2021-06-05 14:14:25,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:14:25,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:14:25,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:14:25,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:14:25,987 INFO L87 Difference]: Start difference. First operand 3455 states and 21883 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:26,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:14:26,232 INFO L93 Difference]: Finished difference Result 12126 states and 75417 transitions. [2021-06-05 14:14:26,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:14:26,233 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 14:14:26,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:14:26,301 INFO L225 Difference]: With dead ends: 12126 [2021-06-05 14:14:26,301 INFO L226 Difference]: Without dead ends: 10635 [2021-06-05 14:14:26,301 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 82.6ms TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:14:26,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10635 states. [2021-06-05 14:14:26,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10635 to 6709. [2021-06-05 14:14:26,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6709 states, 6708 states have (on average 6.719886702444842) internal successors, (45077), 6708 states have internal predecessors, (45077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:26,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6709 states to 6709 states and 45077 transitions. [2021-06-05 14:14:26,651 INFO L78 Accepts]: Start accepts. Automaton has 6709 states and 45077 transitions. Word has length 27 [2021-06-05 14:14:26,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:14:26,651 INFO L482 AbstractCegarLoop]: Abstraction has 6709 states and 45077 transitions. [2021-06-05 14:14:26,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:26,652 INFO L276 IsEmpty]: Start isEmpty. Operand 6709 states and 45077 transitions. [2021-06-05 14:14:26,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 14:14:26,680 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:14:26,680 INFO L521 BasicCegarLoop]: trace histogram [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 14:14:26,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:14:26,901 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:14:26,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:14:26,902 INFO L82 PathProgramCache]: Analyzing trace with hash 329078829, now seen corresponding path program 3 times [2021-06-05 14:14:26,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:14:26,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177395357] [2021-06-05 14:14:26,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:14:26,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:14:26,932 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 14:14:26,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:14:26,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177395357] [2021-06-05 14:14:26,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177395357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:26,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146341218] [2021-06-05 14:14:26,933 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 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 14:14:26,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:14:26,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:14:26,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 14:14:26,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:14:27,093 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 14:14:27,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146341218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:27,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:14:27,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 14:14:27,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234366358] [2021-06-05 14:14:27,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:14:27,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:14:27,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:14:27,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:14:27,095 INFO L87 Difference]: Start difference. First operand 6709 states and 45077 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:27,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:14:27,223 INFO L93 Difference]: Finished difference Result 10641 states and 67958 transitions. [2021-06-05 14:14:27,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:14:27,224 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have 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 14:14:27,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:14:27,258 INFO L225 Difference]: With dead ends: 10641 [2021-06-05 14:14:27,258 INFO L226 Difference]: Without dead ends: 8426 [2021-06-05 14:14:27,258 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 27.3ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:14:27,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8426 states. [2021-06-05 14:14:27,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8426 to 6226. [2021-06-05 14:14:27,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6226 states, 6225 states have (on average 6.617510040160642) internal successors, (41194), 6225 states have internal predecessors, (41194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:27,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6226 states to 6226 states and 41194 transitions. [2021-06-05 14:14:27,499 INFO L78 Accepts]: Start accepts. Automaton has 6226 states and 41194 transitions. Word has length 28 [2021-06-05 14:14:27,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:14:27,499 INFO L482 AbstractCegarLoop]: Abstraction has 6226 states and 41194 transitions. [2021-06-05 14:14:27,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:27,500 INFO L276 IsEmpty]: Start isEmpty. Operand 6226 states and 41194 transitions. [2021-06-05 14:14:27,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 14:14:27,516 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:14:27,516 INFO L521 BasicCegarLoop]: trace histogram [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 14:14:27,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:14:27,726 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:14:27,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:14:27,727 INFO L82 PathProgramCache]: Analyzing trace with hash 589935477, now seen corresponding path program 4 times [2021-06-05 14:14:27,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:14:27,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773548877] [2021-06-05 14:14:27,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:14:27,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:14:27,761 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 14:14:27,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:14:27,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773548877] [2021-06-05 14:14:27,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773548877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:27,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52303803] [2021-06-05 14:14:27,761 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 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 14:14:27,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:14:27,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:14:27,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 14:14:27,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:14:27,959 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 14:14:27,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52303803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:27,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:14:27,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 14:14:27,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701427131] [2021-06-05 14:14:27,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:14:27,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:14:27,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:14:27,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:14:27,960 INFO L87 Difference]: Start difference. First operand 6226 states and 41194 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:28,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:14:28,164 INFO L93 Difference]: Finished difference Result 11692 states and 73874 transitions. [2021-06-05 14:14:28,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:14:28,165 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have 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 14:14:28,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:14:28,196 INFO L225 Difference]: With dead ends: 11692 [2021-06-05 14:14:28,196 INFO L226 Difference]: Without dead ends: 7762 [2021-06-05 14:14:28,197 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 38.7ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:14:28,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7762 states. [2021-06-05 14:14:28,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7762 to 6226. [2021-06-05 14:14:28,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6226 states, 6225 states have (on average 6.525622489959839) internal successors, (40622), 6225 states have internal predecessors, (40622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:28,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6226 states to 6226 states and 40622 transitions. [2021-06-05 14:14:28,374 INFO L78 Accepts]: Start accepts. Automaton has 6226 states and 40622 transitions. Word has length 28 [2021-06-05 14:14:28,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:14:28,376 INFO L482 AbstractCegarLoop]: Abstraction has 6226 states and 40622 transitions. [2021-06-05 14:14:28,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:28,376 INFO L276 IsEmpty]: Start isEmpty. Operand 6226 states and 40622 transitions. [2021-06-05 14:14:28,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 14:14:28,444 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:14:28,444 INFO L521 BasicCegarLoop]: trace histogram [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 14:14:28,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 14:14:28,645 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:14:28,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:14:28,645 INFO L82 PathProgramCache]: Analyzing trace with hash 913623149, now seen corresponding path program 5 times [2021-06-05 14:14:28,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:14:28,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381103912] [2021-06-05 14:14:28,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:14:28,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:14:28,675 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 14:14:28,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:14:28,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381103912] [2021-06-05 14:14:28,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381103912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:28,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856681255] [2021-06-05 14:14:28,676 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 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 14:14:28,720 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:14:28,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:14:28,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 14:14:28,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:14:28,792 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 14:14:28,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856681255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:28,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:14:28,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 14:14:28,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578098145] [2021-06-05 14:14:28,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:14:28,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:14:28,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:14:28,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:14:28,795 INFO L87 Difference]: Start difference. First operand 6226 states and 40622 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:28,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:14:28,925 INFO L93 Difference]: Finished difference Result 10638 states and 67096 transitions. [2021-06-05 14:14:28,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:14:28,925 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have 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 14:14:28,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:14:28,949 INFO L225 Difference]: With dead ends: 10638 [2021-06-05 14:14:28,949 INFO L226 Difference]: Without dead ends: 7656 [2021-06-05 14:14:28,949 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 34.2ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:14:28,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7656 states. [2021-06-05 14:14:29,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7656 to 5654. [2021-06-05 14:14:29,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5654 states, 5653 states have (on average 6.388466301079073) internal successors, (36114), 5653 states have internal predecessors, (36114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:29,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5654 states to 5654 states and 36114 transitions. [2021-06-05 14:14:29,152 INFO L78 Accepts]: Start accepts. Automaton has 5654 states and 36114 transitions. Word has length 28 [2021-06-05 14:14:29,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:14:29,153 INFO L482 AbstractCegarLoop]: Abstraction has 5654 states and 36114 transitions. [2021-06-05 14:14:29,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:29,153 INFO L276 IsEmpty]: Start isEmpty. Operand 5654 states and 36114 transitions. [2021-06-05 14:14:29,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 14:14:29,166 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:14:29,166 INFO L521 BasicCegarLoop]: trace histogram [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 14:14:29,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-05 14:14:29,385 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:14:29,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:14:29,385 INFO L82 PathProgramCache]: Analyzing trace with hash -317378095, now seen corresponding path program 6 times [2021-06-05 14:14:29,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:14:29,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538330246] [2021-06-05 14:14:29,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:14:29,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:14:29,413 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 14:14:29,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:14:29,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538330246] [2021-06-05 14:14:29,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538330246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:29,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475091880] [2021-06-05 14:14:29,413 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 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 14:14:29,450 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:14:29,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:14:29,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 14:14:29,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:14:29,521 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 14:14:29,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475091880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:29,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:14:29,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 14:14:29,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058922161] [2021-06-05 14:14:29,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:14:29,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:14:29,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:14:29,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:14:29,522 INFO L87 Difference]: Start difference. First operand 5654 states and 36114 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:29,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:14:29,627 INFO L93 Difference]: Finished difference Result 8816 states and 55756 transitions. [2021-06-05 14:14:29,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:14:29,628 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have 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 14:14:29,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:14:29,656 INFO L225 Difference]: With dead ends: 8816 [2021-06-05 14:14:29,656 INFO L226 Difference]: Without dead ends: 7190 [2021-06-05 14:14:29,657 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 21.9ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:14:29,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7190 states. [2021-06-05 14:14:29,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7190 to 5368. [2021-06-05 14:14:29,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5368 states, 5367 states have (on average 6.3355692193031485) internal successors, (34003), 5367 states have internal predecessors, (34003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:29,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5368 states to 5368 states and 34003 transitions. [2021-06-05 14:14:29,895 INFO L78 Accepts]: Start accepts. Automaton has 5368 states and 34003 transitions. Word has length 28 [2021-06-05 14:14:29,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:14:29,896 INFO L482 AbstractCegarLoop]: Abstraction has 5368 states and 34003 transitions. [2021-06-05 14:14:29,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:29,896 INFO L276 IsEmpty]: Start isEmpty. Operand 5368 states and 34003 transitions. [2021-06-05 14:14:29,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 14:14:29,910 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:14:29,910 INFO L521 BasicCegarLoop]: trace histogram [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 14:14:30,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:14:30,127 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:14:30,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:14:30,128 INFO L82 PathProgramCache]: Analyzing trace with hash -451391601, now seen corresponding path program 7 times [2021-06-05 14:14:30,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:14:30,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606693077] [2021-06-05 14:14:30,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:14:30,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:14:30,155 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 14:14:30,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:14:30,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606693077] [2021-06-05 14:14:30,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606693077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:30,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716273595] [2021-06-05 14:14:30,155 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 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 14:14:30,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:14:30,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 14:14:30,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:14:30,265 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 14:14:30,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716273595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:30,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:14:30,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 14:14:30,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959608291] [2021-06-05 14:14:30,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:14:30,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:14:30,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:14:30,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:14:30,266 INFO L87 Difference]: Start difference. First operand 5368 states and 34003 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:30,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:14:30,388 INFO L93 Difference]: Finished difference Result 7762 states and 48993 transitions. [2021-06-05 14:14:30,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:14:30,388 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 14:14:30,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:14:30,412 INFO L225 Difference]: With dead ends: 7762 [2021-06-05 14:14:30,412 INFO L226 Difference]: Without dead ends: 6512 [2021-06-05 14:14:30,412 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 39.4ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:14:30,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6512 states. [2021-06-05 14:14:30,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6512 to 5940. [2021-06-05 14:14:30,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5940 states, 5939 states have (on average 6.339956221586125) internal successors, (37653), 5939 states have internal predecessors, (37653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:30,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5940 states to 5940 states and 37653 transitions. [2021-06-05 14:14:30,571 INFO L78 Accepts]: Start accepts. Automaton has 5940 states and 37653 transitions. Word has length 28 [2021-06-05 14:14:30,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:14:30,571 INFO L482 AbstractCegarLoop]: Abstraction has 5940 states and 37653 transitions. [2021-06-05 14:14:30,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:30,572 INFO L276 IsEmpty]: Start isEmpty. Operand 5940 states and 37653 transitions. [2021-06-05 14:14:30,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:14:30,587 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:14:30,587 INFO L521 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] [2021-06-05 14:14:30,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:14:30,803 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:14:30,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:14:30,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1791557168, now seen corresponding path program 8 times [2021-06-05 14:14:30,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:14:30,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952255992] [2021-06-05 14:14:30,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:14:30,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:14:30,844 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 14:14:30,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:14:30,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952255992] [2021-06-05 14:14:30,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952255992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:30,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517352647] [2021-06-05 14:14:30,844 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 14:14:30,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:14:30,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:14:30,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:14:30,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:14:31,026 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 14:14:31,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517352647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:31,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:14:31,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-06-05 14:14:31,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156185730] [2021-06-05 14:14:31,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:14:31,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:14:31,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:14:31,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:14:31,028 INFO L87 Difference]: Start difference. First operand 5940 states and 37653 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 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 14:14:31,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:14:31,161 INFO L93 Difference]: Finished difference Result 13716 states and 86495 transitions. [2021-06-05 14:14:31,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:14:31,162 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 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 29 [2021-06-05 14:14:31,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:14:31,209 INFO L225 Difference]: With dead ends: 13716 [2021-06-05 14:14:31,209 INFO L226 Difference]: Without dead ends: 12948 [2021-06-05 14:14:31,210 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 44.3ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:14:31,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12948 states. [2021-06-05 14:14:31,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12948 to 9586. [2021-06-05 14:14:31,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9586 states, 9585 states have (on average 6.6200312989045385) internal successors, (63453), 9585 states have internal predecessors, (63453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:31,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9586 states to 9586 states and 63453 transitions. [2021-06-05 14:14:31,502 INFO L78 Accepts]: Start accepts. Automaton has 9586 states and 63453 transitions. Word has length 29 [2021-06-05 14:14:31,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:14:31,502 INFO L482 AbstractCegarLoop]: Abstraction has 9586 states and 63453 transitions. [2021-06-05 14:14:31,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 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 14:14:31,502 INFO L276 IsEmpty]: Start isEmpty. Operand 9586 states and 63453 transitions. [2021-06-05 14:14:31,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 14:14:31,526 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:14:31,526 INFO L521 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] [2021-06-05 14:14:31,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 14:14:31,727 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:14:31,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:14:31,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1011086738, now seen corresponding path program 9 times [2021-06-05 14:14:31,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:14:31,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729791540] [2021-06-05 14:14:31,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:14:31,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:14:31,771 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 14:14:31,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:14:31,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729791540] [2021-06-05 14:14:31,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729791540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:31,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339438730] [2021-06-05 14:14:31,771 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 14:14:31,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:14:31,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:14:31,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:14:31,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:14:31,874 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 14:14:31,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339438730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:31,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:14:31,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-06-05 14:14:31,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892245076] [2021-06-05 14:14:31,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:14:31,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:14:31,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:14:31,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:14:31,876 INFO L87 Difference]: Start difference. First operand 9586 states and 63453 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:32,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:14:32,233 INFO L93 Difference]: Finished difference Result 25346 states and 162331 transitions. [2021-06-05 14:14:32,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:14:32,234 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 14:14:32,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:14:32,324 INFO L225 Difference]: With dead ends: 25346 [2021-06-05 14:14:32,325 INFO L226 Difference]: Without dead ends: 23242 [2021-06-05 14:14:32,325 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 92.9ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:14:32,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23242 states. [2021-06-05 14:14:32,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23242 to 14272. [2021-06-05 14:14:32,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14272 states, 14271 states have (on average 6.922219886483077) internal successors, (98787), 14271 states have internal predecessors, (98787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:32,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14272 states to 14272 states and 98787 transitions. [2021-06-05 14:14:32,806 INFO L78 Accepts]: Start accepts. Automaton has 14272 states and 98787 transitions. Word has length 29 [2021-06-05 14:14:32,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:14:32,806 INFO L482 AbstractCegarLoop]: Abstraction has 14272 states and 98787 transitions. [2021-06-05 14:14:32,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:32,806 INFO L276 IsEmpty]: Start isEmpty. Operand 14272 states and 98787 transitions. [2021-06-05 14:14:32,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 14:14:32,845 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:14:32,845 INFO L521 BasicCegarLoop]: trace histogram [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, 1, 1] [2021-06-05 14:14:33,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 14:14:33,046 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:14:33,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:14:33,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1639971327, now seen corresponding path program 10 times [2021-06-05 14:14:33,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:14:33,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507402303] [2021-06-05 14:14:33,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:14:33,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:14:33,079 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 14:14:33,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:14:33,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507402303] [2021-06-05 14:14:33,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507402303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:33,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374386919] [2021-06-05 14:14:33,079 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 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 14:14:33,119 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:14:33,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:14:33,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 14:14:33,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:14:33,189 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 14:14:33,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374386919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:33,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:14:33,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 14:14:33,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965425283] [2021-06-05 14:14:33,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:14:33,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:14:33,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:14:33,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:14:33,190 INFO L87 Difference]: Start difference. First operand 14272 states and 98787 transitions. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 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 14:14:33,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:14:33,385 INFO L93 Difference]: Finished difference Result 19626 states and 131324 transitions. [2021-06-05 14:14:33,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:14:33,385 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 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 14:14:33,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:14:33,451 INFO L225 Difference]: With dead ends: 19626 [2021-06-05 14:14:33,452 INFO L226 Difference]: Without dead ends: 16783 [2021-06-05 14:14:33,452 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 24.2ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:14:33,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16783 states. [2021-06-05 14:14:33,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16783 to 13215. [2021-06-05 14:14:33,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13215 states, 13214 states have (on average 6.851672468593915) internal successors, (90538), 13214 states have internal predecessors, (90538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:33,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13215 states to 13215 states and 90538 transitions. [2021-06-05 14:14:33,817 INFO L78 Accepts]: Start accepts. Automaton has 13215 states and 90538 transitions. Word has length 30 [2021-06-05 14:14:33,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:14:33,817 INFO L482 AbstractCegarLoop]: Abstraction has 13215 states and 90538 transitions. [2021-06-05 14:14:33,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 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 14:14:33,818 INFO L276 IsEmpty]: Start isEmpty. Operand 13215 states and 90538 transitions. [2021-06-05 14:14:33,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 14:14:33,850 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:14:33,850 INFO L521 BasicCegarLoop]: trace histogram [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, 1, 1] [2021-06-05 14:14:34,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 14:14:34,051 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:14:34,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:14:34,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1256865581, now seen corresponding path program 11 times [2021-06-05 14:14:34,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:14:34,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259054159] [2021-06-05 14:14:34,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:14:34,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:14:34,072 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 14:14:34,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:14:34,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259054159] [2021-06-05 14:14:34,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259054159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:34,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315838315] [2021-06-05 14:14:34,073 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 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 14:14:34,109 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:14:34,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:14:34,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 14:14:34,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:14:34,170 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 14:14:34,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315838315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:34,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:14:34,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 14:14:34,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113958266] [2021-06-05 14:14:34,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:14:34,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:14:34,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:14:34,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:14:34,171 INFO L87 Difference]: Start difference. First operand 13215 states and 90538 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 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 14:14:34,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:14:34,485 INFO L93 Difference]: Finished difference Result 20352 states and 135504 transitions. [2021-06-05 14:14:34,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:14:34,486 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 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 14:14:34,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:14:34,543 INFO L225 Difference]: With dead ends: 20352 [2021-06-05 14:14:34,543 INFO L226 Difference]: Without dead ends: 15593 [2021-06-05 14:14:34,543 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 35.6ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:14:34,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15593 states. [2021-06-05 14:14:34,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15593 to 13215. [2021-06-05 14:14:34,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13215 states, 13214 states have (on average 6.761767822006962) internal successors, (89350), 13214 states have internal predecessors, (89350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:34,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13215 states to 13215 states and 89350 transitions. [2021-06-05 14:14:34,858 INFO L78 Accepts]: Start accepts. Automaton has 13215 states and 89350 transitions. Word has length 30 [2021-06-05 14:14:34,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:14:34,858 INFO L482 AbstractCegarLoop]: Abstraction has 13215 states and 89350 transitions. [2021-06-05 14:14:34,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 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 14:14:34,858 INFO L276 IsEmpty]: Start isEmpty. Operand 13215 states and 89350 transitions. [2021-06-05 14:14:34,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 14:14:34,889 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:14:34,889 INFO L521 BasicCegarLoop]: trace histogram [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, 1, 1] [2021-06-05 14:14:35,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:14:35,090 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:14:35,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:14:35,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1618072385, now seen corresponding path program 12 times [2021-06-05 14:14:35,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:14:35,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765014307] [2021-06-05 14:14:35,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:14:35,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:14:35,113 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 14:14:35,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:14:35,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765014307] [2021-06-05 14:14:35,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765014307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:35,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541493218] [2021-06-05 14:14:35,114 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 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 14:14:35,151 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:14:35,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:14:35,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 14:14:35,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:14:35,217 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 14:14:35,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541493218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:35,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:14:35,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 14:14:35,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944758425] [2021-06-05 14:14:35,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:14:35,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:14:35,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:14:35,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:14:35,218 INFO L87 Difference]: Start difference. First operand 13215 states and 89350 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:35,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:14:35,413 INFO L93 Difference]: Finished difference Result 19162 states and 126426 transitions. [2021-06-05 14:14:35,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:14:35,413 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have 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 14:14:35,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:14:35,471 INFO L225 Difference]: With dead ends: 19162 [2021-06-05 14:14:35,471 INFO L226 Difference]: Without dead ends: 16185 [2021-06-05 14:14:35,472 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 42.0ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:14:35,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16185 states. [2021-06-05 14:14:35,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16185 to 12027. [2021-06-05 14:14:35,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12027 states, 12026 states have (on average 6.625644437053052) internal successors, (79680), 12026 states have internal predecessors, (79680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:35,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12027 states to 12027 states and 79680 transitions. [2021-06-05 14:14:35,767 INFO L78 Accepts]: Start accepts. Automaton has 12027 states and 79680 transitions. Word has length 30 [2021-06-05 14:14:35,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:14:35,767 INFO L482 AbstractCegarLoop]: Abstraction has 12027 states and 79680 transitions. [2021-06-05 14:14:35,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:35,767 INFO L276 IsEmpty]: Start isEmpty. Operand 12027 states and 79680 transitions. [2021-06-05 14:14:35,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 14:14:35,794 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:14:35,795 INFO L521 BasicCegarLoop]: trace histogram [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, 1, 1] [2021-06-05 14:14:35,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 14:14:35,998 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:14:35,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:14:35,999 INFO L82 PathProgramCache]: Analyzing trace with hash 937421221, now seen corresponding path program 13 times [2021-06-05 14:14:35,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:14:35,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130791666] [2021-06-05 14:14:35,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:14:36,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:14:36,047 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 14:14:36,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:14:36,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130791666] [2021-06-05 14:14:36,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130791666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:36,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626774443] [2021-06-05 14:14:36,047 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 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 14:14:36,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:14:36,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 14:14:36,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:14:36,162 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 14:14:36,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626774443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:36,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:14:36,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 14:14:36,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549468694] [2021-06-05 14:14:36,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:14:36,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:14:36,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:14:36,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:14:36,164 INFO L87 Difference]: Start difference. First operand 12027 states and 79680 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:36,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:14:36,339 INFO L93 Difference]: Finished difference Result 16783 states and 110645 transitions. [2021-06-05 14:14:36,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:14:36,340 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have 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 14:14:36,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:14:36,391 INFO L225 Difference]: With dead ends: 16783 [2021-06-05 14:14:36,391 INFO L226 Difference]: Without dead ends: 14405 [2021-06-05 14:14:36,392 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 29.2ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:14:36,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14405 states. [2021-06-05 14:14:36,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14405 to 11433. [2021-06-05 14:14:36,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11433 states, 11432 states have (on average 6.57295311406578) internal successors, (75142), 11432 states have internal predecessors, (75142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:36,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11433 states to 11433 states and 75142 transitions. [2021-06-05 14:14:36,664 INFO L78 Accepts]: Start accepts. Automaton has 11433 states and 75142 transitions. Word has length 30 [2021-06-05 14:14:36,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:14:36,664 INFO L482 AbstractCegarLoop]: Abstraction has 11433 states and 75142 transitions. [2021-06-05 14:14:36,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:36,664 INFO L276 IsEmpty]: Start isEmpty. Operand 11433 states and 75142 transitions. [2021-06-05 14:14:36,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 14:14:36,692 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:14:36,692 INFO L521 BasicCegarLoop]: trace histogram [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, 1, 1] [2021-06-05 14:14:36,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:14:36,905 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:14:36,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:14:36,905 INFO L82 PathProgramCache]: Analyzing trace with hash -73696029, now seen corresponding path program 14 times [2021-06-05 14:14:36,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:14:36,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901217186] [2021-06-05 14:14:36,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:14:36,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:14:36,926 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 14:14:36,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:14:36,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901217186] [2021-06-05 14:14:36,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901217186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:36,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102803397] [2021-06-05 14:14:36,927 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 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 14:14:36,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:14:36,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:14:36,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 14:14:36,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:14:37,015 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 14:14:37,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102803397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:37,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:14:37,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 14:14:37,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399987586] [2021-06-05 14:14:37,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:14:37,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:14:37,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:14:37,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:14:37,016 INFO L87 Difference]: Start difference. First operand 11433 states and 75142 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:37,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:14:37,165 INFO L93 Difference]: Finished difference Result 15000 states and 98811 transitions. [2021-06-05 14:14:37,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:14:37,165 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 14:14:37,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:14:37,214 INFO L225 Difference]: With dead ends: 15000 [2021-06-05 14:14:37,215 INFO L226 Difference]: Without dead ends: 13809 [2021-06-05 14:14:37,215 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 35.0ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:14:37,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13809 states. [2021-06-05 14:14:37,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13809 to 12621. [2021-06-05 14:14:37,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12621 states, 12620 states have (on average 6.579239302694137) internal successors, (83030), 12620 states have internal predecessors, (83030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:37,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12621 states to 12621 states and 83030 transitions. [2021-06-05 14:14:37,512 INFO L78 Accepts]: Start accepts. Automaton has 12621 states and 83030 transitions. Word has length 30 [2021-06-05 14:14:37,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:14:37,512 INFO L482 AbstractCegarLoop]: Abstraction has 12621 states and 83030 transitions. [2021-06-05 14:14:37,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:37,512 INFO L276 IsEmpty]: Start isEmpty. Operand 12621 states and 83030 transitions. [2021-06-05 14:14:37,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 14:14:37,542 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:14:37,542 INFO L521 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, 1] [2021-06-05 14:14:37,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:14:37,742 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:14:37,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:14:37,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1100522568, now seen corresponding path program 15 times [2021-06-05 14:14:37,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:14:37,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129751031] [2021-06-05 14:14:37,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:14:37,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:14:37,770 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 14:14:37,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:14:37,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129751031] [2021-06-05 14:14:37,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129751031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:37,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209484080] [2021-06-05 14:14:37,770 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 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 14:14:37,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:14:37,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:14:37,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:14:37,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:14:37,891 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 14:14:37,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209484080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:37,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:14:37,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 9 [2021-06-05 14:14:37,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111339067] [2021-06-05 14:14:37,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:14:37,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:14:37,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:14:37,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:14:37,894 INFO L87 Difference]: Start difference. First operand 12621 states and 83030 transitions. Second operand has 10 states, 10 states have (on average 5.7) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:38,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:14:38,565 INFO L93 Difference]: Finished difference Result 40048 states and 255837 transitions. [2021-06-05 14:14:38,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:14:38,566 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 14:14:38,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:14:38,700 INFO L225 Difference]: With dead ends: 40048 [2021-06-05 14:14:38,700 INFO L226 Difference]: Without dead ends: 37299 [2021-06-05 14:14:38,701 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 144.8ms TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:14:38,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37299 states. [2021-06-05 14:14:39,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37299 to 23827. [2021-06-05 14:14:39,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23827 states, 23826 states have (on average 6.888734995383195) internal successors, (164131), 23826 states have internal predecessors, (164131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:39,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23827 states to 23827 states and 164131 transitions. [2021-06-05 14:14:39,380 INFO L78 Accepts]: Start accepts. Automaton has 23827 states and 164131 transitions. Word has length 31 [2021-06-05 14:14:39,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:14:39,380 INFO L482 AbstractCegarLoop]: Abstraction has 23827 states and 164131 transitions. [2021-06-05 14:14:39,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:39,380 INFO L276 IsEmpty]: Start isEmpty. Operand 23827 states and 164131 transitions. [2021-06-05 14:14:39,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 14:14:39,438 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:14:39,438 INFO L521 BasicCegarLoop]: trace histogram [3, 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, 1] [2021-06-05 14:14:39,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 14:14:39,640 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:14:39,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:14:39,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1166394235, now seen corresponding path program 16 times [2021-06-05 14:14:39,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:14:39,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020789249] [2021-06-05 14:14:39,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:14:39,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:14:39,671 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 14:14:39,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:14:39,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020789249] [2021-06-05 14:14:39,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020789249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:39,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192453664] [2021-06-05 14:14:39,671 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 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 14:14:39,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:14:39,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:14:39,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:14:39,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:14:39,785 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 14:14:39,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192453664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:39,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:14:39,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-06-05 14:14:39,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500777078] [2021-06-05 14:14:39,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:14:39,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:14:39,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:14:39,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:14:39,787 INFO L87 Difference]: Start difference. First operand 23827 states and 164131 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:40,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:14:40,146 INFO L93 Difference]: Finished difference Result 37282 states and 244997 transitions. [2021-06-05 14:14:40,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:14:40,146 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 14:14:40,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:14:40,286 INFO L225 Difference]: With dead ends: 37282 [2021-06-05 14:14:40,286 INFO L226 Difference]: Without dead ends: 32432 [2021-06-05 14:14:40,287 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 40.4ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:14:40,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32432 states. [2021-06-05 14:14:40,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32432 to 23826. [2021-06-05 14:14:40,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23826 states, 23825 states have (on average 6.828247639034627) internal successors, (162683), 23825 states have internal predecessors, (162683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:40,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23826 states to 23826 states and 162683 transitions. [2021-06-05 14:14:40,975 INFO L78 Accepts]: Start accepts. Automaton has 23826 states and 162683 transitions. Word has length 32 [2021-06-05 14:14:40,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:14:40,975 INFO L482 AbstractCegarLoop]: Abstraction has 23826 states and 162683 transitions. [2021-06-05 14:14:40,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:40,976 INFO L276 IsEmpty]: Start isEmpty. Operand 23826 states and 162683 transitions. [2021-06-05 14:14:41,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 14:14:41,037 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:14:41,037 INFO L521 BasicCegarLoop]: trace histogram [3, 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, 1] [2021-06-05 14:14:41,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:14:41,238 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:14:41,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:14:41,238 INFO L82 PathProgramCache]: Analyzing trace with hash 418167869, now seen corresponding path program 17 times [2021-06-05 14:14:41,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:14:41,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162897682] [2021-06-05 14:14:41,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:14:41,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:14:41,273 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 14:14:41,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:14:41,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162897682] [2021-06-05 14:14:41,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162897682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:41,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419806046] [2021-06-05 14:14:41,273 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 14:14:41,318 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:14:41,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:14:41,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:14:41,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:14:41,399 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 14:14:41,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419806046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:41,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:14:41,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 14:14:41,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085600461] [2021-06-05 14:14:41,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:14:41,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:14:41,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:14:41,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:14:41,400 INFO L87 Difference]: Start difference. First operand 23826 states and 162683 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:41,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:14:41,985 INFO L93 Difference]: Finished difference Result 41333 states and 268452 transitions. [2021-06-05 14:14:41,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:14:41,986 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 14:14:41,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:14:42,113 INFO L225 Difference]: With dead ends: 41333 [2021-06-05 14:14:42,113 INFO L226 Difference]: Without dead ends: 28816 [2021-06-05 14:14:42,113 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 76.8ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:14:42,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28816 states. [2021-06-05 14:14:42,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28816 to 21142. [2021-06-05 14:14:42,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21142 states, 21141 states have (on average 6.765668606026205) internal successors, (143033), 21141 states have internal predecessors, (143033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:42,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21142 states to 21142 states and 143033 transitions. [2021-06-05 14:14:42,704 INFO L78 Accepts]: Start accepts. Automaton has 21142 states and 143033 transitions. Word has length 32 [2021-06-05 14:14:42,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:14:42,704 INFO L482 AbstractCegarLoop]: Abstraction has 21142 states and 143033 transitions. [2021-06-05 14:14:42,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:42,704 INFO L276 IsEmpty]: Start isEmpty. Operand 21142 states and 143033 transitions. [2021-06-05 14:14:42,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 14:14:42,759 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:14:42,759 INFO L521 BasicCegarLoop]: trace histogram [3, 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, 1] [2021-06-05 14:14:42,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 14:14:42,959 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:14:42,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:14:42,960 INFO L82 PathProgramCache]: Analyzing trace with hash 791966179, now seen corresponding path program 18 times [2021-06-05 14:14:42,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:14:42,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609136134] [2021-06-05 14:14:42,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:14:42,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:14:42,988 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 14:14:42,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:14:42,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609136134] [2021-06-05 14:14:42,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609136134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:42,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050562538] [2021-06-05 14:14:42,988 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 14:14:43,025 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:14:43,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:14:43,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:14:43,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:14:43,119 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 14:14:43,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050562538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:43,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:14:43,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 14:14:43,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139089129] [2021-06-05 14:14:43,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:14:43,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:14:43,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:14:43,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:14:43,121 INFO L87 Difference]: Start difference. First operand 21142 states and 143033 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:43,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:14:43,527 INFO L93 Difference]: Finished difference Result 44813 states and 287398 transitions. [2021-06-05 14:14:43,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:14:43,527 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 14:14:43,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:14:43,655 INFO L225 Difference]: With dead ends: 44813 [2021-06-05 14:14:43,655 INFO L226 Difference]: Without dead ends: 33157 [2021-06-05 14:14:43,656 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 66.9ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:14:43,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33157 states. [2021-06-05 14:14:44,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33157 to 20660. [2021-06-05 14:14:44,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20660 states, 20659 states have (on average 6.63855946560821) internal successors, (137146), 20659 states have internal predecessors, (137146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:44,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20660 states to 20660 states and 137146 transitions. [2021-06-05 14:14:44,303 INFO L78 Accepts]: Start accepts. Automaton has 20660 states and 137146 transitions. Word has length 32 [2021-06-05 14:14:44,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:14:44,303 INFO L482 AbstractCegarLoop]: Abstraction has 20660 states and 137146 transitions. [2021-06-05 14:14:44,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:44,303 INFO L276 IsEmpty]: Start isEmpty. Operand 20660 states and 137146 transitions. [2021-06-05 14:14:44,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 14:14:44,352 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:14:44,353 INFO L521 BasicCegarLoop]: trace histogram [3, 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, 1] [2021-06-05 14:14:44,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 14:14:44,569 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:14:44,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:14:44,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1084222905, now seen corresponding path program 19 times [2021-06-05 14:14:44,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:14:44,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240248566] [2021-06-05 14:14:44,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:14:44,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:14:44,596 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 14:14:44,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:14:44,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240248566] [2021-06-05 14:14:44,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240248566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:44,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481813482] [2021-06-05 14:14:44,596 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 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 14:14:44,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:14:44,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:14:44,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:14:44,728 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 14:14:44,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481813482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:44,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:14:44,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 14:14:44,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155564252] [2021-06-05 14:14:44,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:14:44,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:14:44,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:14:44,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:14:44,729 INFO L87 Difference]: Start difference. First operand 20660 states and 137146 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:45,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:14:45,321 INFO L93 Difference]: Finished difference Result 40132 states and 256712 transitions. [2021-06-05 14:14:45,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:14:45,322 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 14:14:45,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:14:45,451 INFO L225 Difference]: With dead ends: 40132 [2021-06-05 14:14:45,451 INFO L226 Difference]: Without dead ends: 29402 [2021-06-05 14:14:45,452 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 57.6ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:14:45,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29402 states. [2021-06-05 14:14:46,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29402 to 19318. [2021-06-05 14:14:46,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19318 states, 19317 states have (on average 6.575969353419268) internal successors, (127028), 19317 states have internal predecessors, (127028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:46,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19318 states to 19318 states and 127028 transitions. [2021-06-05 14:14:46,214 INFO L78 Accepts]: Start accepts. Automaton has 19318 states and 127028 transitions. Word has length 32 [2021-06-05 14:14:46,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:14:46,215 INFO L482 AbstractCegarLoop]: Abstraction has 19318 states and 127028 transitions. [2021-06-05 14:14:46,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:46,215 INFO L276 IsEmpty]: Start isEmpty. Operand 19318 states and 127028 transitions. [2021-06-05 14:14:46,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 14:14:46,480 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:14:46,480 INFO L521 BasicCegarLoop]: trace histogram [3, 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, 1] [2021-06-05 14:14:46,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:14:46,681 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:14:46,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:14:46,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1022183291, now seen corresponding path program 20 times [2021-06-05 14:14:46,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:14:46,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42207059] [2021-06-05 14:14:46,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:14:46,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:14:46,711 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 14:14:46,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:14:46,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42207059] [2021-06-05 14:14:46,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42207059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:46,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652831626] [2021-06-05 14:14:46,712 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 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 14:14:46,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:14:46,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:14:46,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:14:46,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:14:46,860 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 14:14:46,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652831626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:46,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:14:46,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 14:14:46,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133288157] [2021-06-05 14:14:46,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:14:46,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:14:46,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:14:46,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:14:46,861 INFO L87 Difference]: Start difference. First operand 19318 states and 127028 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:47,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:14:47,405 INFO L93 Difference]: Finished difference Result 30263 states and 196279 transitions. [2021-06-05 14:14:47,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:14:47,405 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 14:14:47,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:14:47,520 INFO L225 Difference]: With dead ends: 30263 [2021-06-05 14:14:47,521 INFO L226 Difference]: Without dead ends: 27994 [2021-06-05 14:14:47,521 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 80.7ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:14:47,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27994 states. [2021-06-05 14:14:48,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27994 to 19318. [2021-06-05 14:14:48,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19318 states, 19317 states have (on average 6.575969353419268) internal successors, (127028), 19317 states have internal predecessors, (127028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:48,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19318 states to 19318 states and 127028 transitions. [2021-06-05 14:14:48,182 INFO L78 Accepts]: Start accepts. Automaton has 19318 states and 127028 transitions. Word has length 32 [2021-06-05 14:14:48,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:14:48,183 INFO L482 AbstractCegarLoop]: Abstraction has 19318 states and 127028 transitions. [2021-06-05 14:14:48,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:48,183 INFO L276 IsEmpty]: Start isEmpty. Operand 19318 states and 127028 transitions. [2021-06-05 14:14:48,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 14:14:48,239 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:14:48,239 INFO L521 BasicCegarLoop]: trace histogram [3, 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, 1] [2021-06-05 14:14:48,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 14:14:48,440 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:14:48,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:14:48,441 INFO L82 PathProgramCache]: Analyzing trace with hash 13605117, now seen corresponding path program 21 times [2021-06-05 14:14:48,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:14:48,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020687777] [2021-06-05 14:14:48,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:14:48,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:14:48,475 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 14:14:48,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:14:48,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020687777] [2021-06-05 14:14:48,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020687777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:48,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810543569] [2021-06-05 14:14:48,475 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 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 14:14:48,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:14:48,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:14:48,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:14:48,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:14:48,630 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-05 14:14:48,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810543569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:48,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:14:48,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-06-05 14:14:48,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129746926] [2021-06-05 14:14:48,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:14:48,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:14:48,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:14:48,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:14:48,633 INFO L87 Difference]: Start difference. First operand 19318 states and 127028 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:50,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:14:50,032 INFO L93 Difference]: Finished difference Result 45485 states and 293122 transitions. [2021-06-05 14:14:50,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 14:14:50,032 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 14:14:50,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:14:50,205 INFO L225 Difference]: With dead ends: 45485 [2021-06-05 14:14:50,205 INFO L226 Difference]: Without dead ends: 40798 [2021-06-05 14:14:50,206 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 359.7ms TimeCoverageRelationStatistics Valid=240, Invalid=1740, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 14:14:50,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40798 states. [2021-06-05 14:14:50,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40798 to 22218. [2021-06-05 14:14:50,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22218 states, 22217 states have (on average 6.736643111131116) internal successors, (149668), 22217 states have internal predecessors, (149668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:51,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22218 states to 22218 states and 149668 transitions. [2021-06-05 14:14:51,205 INFO L78 Accepts]: Start accepts. Automaton has 22218 states and 149668 transitions. Word has length 32 [2021-06-05 14:14:51,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:14:51,205 INFO L482 AbstractCegarLoop]: Abstraction has 22218 states and 149668 transitions. [2021-06-05 14:14:51,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:51,205 INFO L276 IsEmpty]: Start isEmpty. Operand 22218 states and 149668 transitions. [2021-06-05 14:14:51,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 14:14:51,263 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:14:51,264 INFO L521 BasicCegarLoop]: trace histogram [3, 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, 1] [2021-06-05 14:14:51,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:14:51,464 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:14:51,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:14:51,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1536238151, now seen corresponding path program 22 times [2021-06-05 14:14:51,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:14:51,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920173333] [2021-06-05 14:14:51,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:14:51,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:14:51,493 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 14:14:51,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:14:51,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920173333] [2021-06-05 14:14:51,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920173333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:51,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456755629] [2021-06-05 14:14:51,494 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 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 14:14:51,528 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:14:51,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:14:51,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:14:51,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:14:51,601 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 14:14:51,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456755629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:51,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:14:51,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-06-05 14:14:51,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662509663] [2021-06-05 14:14:51,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:14:51,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:14:51,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:14:51,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:14:51,603 INFO L87 Difference]: Start difference. First operand 22218 states and 149668 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:52,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:14:52,178 INFO L93 Difference]: Finished difference Result 41987 states and 272492 transitions. [2021-06-05 14:14:52,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:14:52,178 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 14:14:52,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:14:52,327 INFO L225 Difference]: With dead ends: 41987 [2021-06-05 14:14:52,327 INFO L226 Difference]: Without dead ends: 33040 [2021-06-05 14:14:52,328 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 64.7ms TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:14:52,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33040 states. [2021-06-05 14:14:52,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33040 to 22218. [2021-06-05 14:14:53,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22218 states, 22217 states have (on average 6.7117972723590045) internal successors, (149116), 22217 states have internal predecessors, (149116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:53,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22218 states to 22218 states and 149116 transitions. [2021-06-05 14:14:53,111 INFO L78 Accepts]: Start accepts. Automaton has 22218 states and 149116 transitions. Word has length 32 [2021-06-05 14:14:53,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:14:53,112 INFO L482 AbstractCegarLoop]: Abstraction has 22218 states and 149116 transitions. [2021-06-05 14:14:53,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:53,112 INFO L276 IsEmpty]: Start isEmpty. Operand 22218 states and 149116 transitions. [2021-06-05 14:14:53,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 14:14:53,164 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:14:53,164 INFO L521 BasicCegarLoop]: trace histogram [3, 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, 1] [2021-06-05 14:14:53,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 14:14:53,365 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:14:53,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:14:53,365 INFO L82 PathProgramCache]: Analyzing trace with hash -339950933, now seen corresponding path program 23 times [2021-06-05 14:14:53,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:14:53,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656152592] [2021-06-05 14:14:53,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:14:53,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:14:53,389 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 14:14:53,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:14:53,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656152592] [2021-06-05 14:14:53,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656152592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:53,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539828874] [2021-06-05 14:14:53,389 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 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 14:14:53,425 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:14:53,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:14:53,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:14:53,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:14:53,494 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 14:14:53,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539828874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:53,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:14:53,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-06-05 14:14:53,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806215043] [2021-06-05 14:14:53,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:14:53,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:14:53,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:14:53,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:14:53,495 INFO L87 Difference]: Start difference. First operand 22218 states and 149116 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:54,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:14:54,072 INFO L93 Difference]: Finished difference Result 37137 states and 242038 transitions. [2021-06-05 14:14:54,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:14:54,072 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 14:14:54,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:14:54,196 INFO L225 Difference]: With dead ends: 37137 [2021-06-05 14:14:54,196 INFO L226 Difference]: Without dead ends: 33280 [2021-06-05 14:14:54,196 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 37.8ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:14:54,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33280 states. [2021-06-05 14:14:54,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33280 to 21666. [2021-06-05 14:14:54,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21666 states, 21665 states have (on average 6.638495268866836) internal successors, (143823), 21665 states have internal predecessors, (143823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:55,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21666 states to 21666 states and 143823 transitions. [2021-06-05 14:14:55,146 INFO L78 Accepts]: Start accepts. Automaton has 21666 states and 143823 transitions. Word has length 32 [2021-06-05 14:14:55,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:14:55,146 INFO L482 AbstractCegarLoop]: Abstraction has 21666 states and 143823 transitions. [2021-06-05 14:14:55,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:55,147 INFO L276 IsEmpty]: Start isEmpty. Operand 21666 states and 143823 transitions. [2021-06-05 14:14:55,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 14:14:55,204 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:14:55,204 INFO L521 BasicCegarLoop]: trace histogram [3, 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, 1] [2021-06-05 14:14:55,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 14:14:55,411 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:14:55,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:14:55,411 INFO L82 PathProgramCache]: Analyzing trace with hash -277911319, now seen corresponding path program 24 times [2021-06-05 14:14:55,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:14:55,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826650643] [2021-06-05 14:14:55,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:14:55,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:14:55,437 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 14:14:55,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:14:55,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826650643] [2021-06-05 14:14:55,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826650643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:55,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771331357] [2021-06-05 14:14:55,437 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 14:14:55,486 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:14:55,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:14:55,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:14:55,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:14:55,581 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 14:14:55,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771331357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:55,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:14:55,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 14:14:55,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084768427] [2021-06-05 14:14:55,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:14:55,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:14:55,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:14:55,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:14:55,582 INFO L87 Difference]: Start difference. First operand 21666 states and 143823 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:56,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:14:56,462 INFO L93 Difference]: Finished difference Result 55554 states and 358578 transitions. [2021-06-05 14:14:56,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:14:56,462 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 14:14:56,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:14:56,597 INFO L225 Difference]: With dead ends: 55554 [2021-06-05 14:14:56,598 INFO L226 Difference]: Without dead ends: 31050 [2021-06-05 14:14:56,598 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 122.2ms TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:14:56,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31050 states. [2021-06-05 14:14:57,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31050 to 18354. [2021-06-05 14:14:57,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18354 states, 18353 states have (on average 6.557238598594235) internal successors, (120345), 18353 states have internal predecessors, (120345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:57,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18354 states to 18354 states and 120345 transitions. [2021-06-05 14:14:57,336 INFO L78 Accepts]: Start accepts. Automaton has 18354 states and 120345 transitions. Word has length 32 [2021-06-05 14:14:57,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:14:57,336 INFO L482 AbstractCegarLoop]: Abstraction has 18354 states and 120345 transitions. [2021-06-05 14:14:57,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:57,336 INFO L276 IsEmpty]: Start isEmpty. Operand 18354 states and 120345 transitions. [2021-06-05 14:14:57,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 14:14:57,378 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:14:57,378 INFO L521 BasicCegarLoop]: trace histogram [3, 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, 1] [2021-06-05 14:14:57,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:14:57,579 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:14:57,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:14:57,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1583277101, now seen corresponding path program 25 times [2021-06-05 14:14:57,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:14:57,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583375819] [2021-06-05 14:14:57,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:14:57,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:14:57,608 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 14:14:57,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:14:57,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583375819] [2021-06-05 14:14:57,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583375819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:57,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931285929] [2021-06-05 14:14:57,608 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 14:14:57,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:14:57,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:14:57,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:14:57,718 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 14:14:57,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931285929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:57,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:14:57,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 14:14:57,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462704587] [2021-06-05 14:14:57,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:14:57,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:14:57,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:14:57,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:14:57,719 INFO L87 Difference]: Start difference. First operand 18354 states and 120345 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:58,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:14:58,005 INFO L93 Difference]: Finished difference Result 24315 states and 158900 transitions. [2021-06-05 14:14:58,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:14:58,005 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 14:14:58,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:14:58,077 INFO L225 Difference]: With dead ends: 24315 [2021-06-05 14:14:58,077 INFO L226 Difference]: Without dead ends: 21666 [2021-06-05 14:14:58,078 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 80.4ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:14:58,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21666 states. [2021-06-05 14:14:58,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21666 to 19458. [2021-06-05 14:14:58,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19458 states, 19457 states have (on average 6.559027599321581) internal successors, (127619), 19457 states have internal predecessors, (127619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:58,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19458 states to 19458 states and 127619 transitions. [2021-06-05 14:14:58,678 INFO L78 Accepts]: Start accepts. Automaton has 19458 states and 127619 transitions. Word has length 32 [2021-06-05 14:14:58,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:14:58,679 INFO L482 AbstractCegarLoop]: Abstraction has 19458 states and 127619 transitions. [2021-06-05 14:14:58,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:58,679 INFO L276 IsEmpty]: Start isEmpty. Operand 19458 states and 127619 transitions. [2021-06-05 14:14:58,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 14:14:58,724 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:14:58,724 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-06-05 14:14:58,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:14:58,929 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:14:58,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:14:58,929 INFO L82 PathProgramCache]: Analyzing trace with hash 548184980, now seen corresponding path program 26 times [2021-06-05 14:14:58,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:14:58,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315021609] [2021-06-05 14:14:58,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:14:58,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:14:58,961 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 14:14:58,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:14:58,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315021609] [2021-06-05 14:14:58,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315021609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:58,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750731688] [2021-06-05 14:14:58,961 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 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 14:14:58,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:14:58,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:14:58,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:14:58,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:14:59,121 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 14:14:59,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750731688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:14:59,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:14:59,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 8 [2021-06-05 14:14:59,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053124306] [2021-06-05 14:14:59,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:14:59,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:14:59,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:14:59,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:14:59,122 INFO L87 Difference]: Start difference. First operand 19458 states and 127619 transitions. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:14:59,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:14:59,706 INFO L93 Difference]: Finished difference Result 43790 states and 285373 transitions. [2021-06-05 14:14:59,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:14:59,707 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 14:14:59,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:14:59,882 INFO L225 Difference]: With dead ends: 43790 [2021-06-05 14:14:59,882 INFO L226 Difference]: Without dead ends: 42141 [2021-06-05 14:14:59,882 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 63.8ms TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:14:59,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42141 states. [2021-06-05 14:15:00,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42141 to 31980. [2021-06-05 14:15:00,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31980 states, 31979 states have (on average 6.798211326182807) internal successors, (217400), 31979 states have internal predecessors, (217400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:15:00,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31980 states to 31980 states and 217400 transitions. [2021-06-05 14:15:00,946 INFO L78 Accepts]: Start accepts. Automaton has 31980 states and 217400 transitions. Word has length 33 [2021-06-05 14:15:00,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:15:00,947 INFO L482 AbstractCegarLoop]: Abstraction has 31980 states and 217400 transitions. [2021-06-05 14:15:00,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:15:00,947 INFO L276 IsEmpty]: Start isEmpty. Operand 31980 states and 217400 transitions. [2021-06-05 14:15:01,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 14:15:01,028 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:15:01,028 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-06-05 14:15:01,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-05 14:15:01,229 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:15:01,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:15:01,229 INFO L82 PathProgramCache]: Analyzing trace with hash 692395924, now seen corresponding path program 27 times [2021-06-05 14:15:01,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:15:01,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180412480] [2021-06-05 14:15:01,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:15:01,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:15:01,297 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-06-05 14:15:01,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:15:01,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180412480] [2021-06-05 14:15:01,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180412480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:15:01,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125779599] [2021-06-05 14:15:01,298 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 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 14:15:01,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:15:01,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:15:01,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:15:01,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:15:01,747 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-06-05 14:15:01,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125779599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:15:01,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:15:01,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-06-05 14:15:01,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759390834] [2021-06-05 14:15:01,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:15:01,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:15:01,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:15:01,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:15:01,748 INFO L87 Difference]: Start difference. First operand 31980 states and 217400 transitions. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:15:03,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:15:03,082 INFO L93 Difference]: Finished difference Result 78327 states and 512684 transitions. [2021-06-05 14:15:03,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 14:15:03,082 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 14:15:03,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:15:03,444 INFO L225 Difference]: With dead ends: 78327 [2021-06-05 14:15:03,444 INFO L226 Difference]: Without dead ends: 73049 [2021-06-05 14:15:03,444 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 274.3ms TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:15:03,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73049 states. [2021-06-05 14:15:04,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73049 to 37920. [2021-06-05 14:15:04,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37920 states, 37919 states have (on average 6.966454811572035) internal successors, (264161), 37919 states have internal predecessors, (264161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:15:05,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37920 states to 37920 states and 264161 transitions. [2021-06-05 14:15:05,468 INFO L78 Accepts]: Start accepts. Automaton has 37920 states and 264161 transitions. Word has length 33 [2021-06-05 14:15:05,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:15:05,469 INFO L482 AbstractCegarLoop]: Abstraction has 37920 states and 264161 transitions. [2021-06-05 14:15:05,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:15:05,469 INFO L276 IsEmpty]: Start isEmpty. Operand 37920 states and 264161 transitions. [2021-06-05 14:15:05,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 14:15:05,609 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:15:05,609 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-06-05 14:15:05,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:15:05,810 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:15:05,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:15:05,810 INFO L82 PathProgramCache]: Analyzing trace with hash -694764650, now seen corresponding path program 28 times [2021-06-05 14:15:05,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:15:05,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26535643] [2021-06-05 14:15:05,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:15:05,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:15:05,842 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-06-05 14:15:05,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:15:05,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26535643] [2021-06-05 14:15:05,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26535643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:15:05,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162890770] [2021-06-05 14:15:05,843 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 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 14:15:05,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:15:05,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:15:05,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:15:05,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:15:05,932 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-06-05 14:15:05,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162890770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:15:05,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:15:05,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 14:15:05,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436394459] [2021-06-05 14:15:05,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:15:05,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:15:05,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:15:05,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:15:05,933 INFO L87 Difference]: Start difference. First operand 37920 states and 264161 transitions. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:15:07,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:15:07,280 INFO L93 Difference]: Finished difference Result 100012 states and 667139 transitions. [2021-06-05 14:15:07,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:15:07,281 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 14:15:07,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:15:07,705 INFO L225 Difference]: With dead ends: 100012 [2021-06-05 14:15:07,706 INFO L226 Difference]: Without dead ends: 92787 [2021-06-05 14:15:07,706 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 118.8ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:15:07,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92787 states. [2021-06-05 14:15:09,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92787 to 58925. [2021-06-05 14:15:09,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58925 states, 58924 states have (on average 7.206706944538728) internal successors, (424648), 58924 states have internal predecessors, (424648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:15:10,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58925 states to 58925 states and 424648 transitions. [2021-06-05 14:15:10,280 INFO L78 Accepts]: Start accepts. Automaton has 58925 states and 424648 transitions. Word has length 33 [2021-06-05 14:15:10,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:15:10,281 INFO L482 AbstractCegarLoop]: Abstraction has 58925 states and 424648 transitions. [2021-06-05 14:15:10,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:15:10,281 INFO L276 IsEmpty]: Start isEmpty. Operand 58925 states and 424648 transitions. [2021-06-05 14:15:10,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 14:15:10,478 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:15:10,478 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 14:15:10,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 14:15:10,679 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:15:10,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:15:10,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1092657503, now seen corresponding path program 29 times [2021-06-05 14:15:10,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:15:10,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88407329] [2021-06-05 14:15:10,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:15:10,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:15:10,701 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-06-05 14:15:10,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:15:10,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88407329] [2021-06-05 14:15:10,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88407329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:15:10,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479501832] [2021-06-05 14:15:10,701 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 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 14:15:10,751 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:15:10,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:15:10,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 14:15:10,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:15:10,819 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-06-05 14:15:10,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479501832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:15:10,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:15:10,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 14:15:10,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186545423] [2021-06-05 14:15:10,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:15:10,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:15:10,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:15:10,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:15:10,821 INFO L87 Difference]: Start difference. First operand 58925 states and 424648 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:15:11,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:15:11,996 INFO L93 Difference]: Finished difference Result 86764 states and 598397 transitions. [2021-06-05 14:15:11,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:15:11,996 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 14:15:11,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:15:12,742 INFO L225 Difference]: With dead ends: 86764 [2021-06-05 14:15:12,742 INFO L226 Difference]: Without dead ends: 74248 [2021-06-05 14:15:12,743 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 23.6ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:15:12,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74248 states. [2021-06-05 14:15:14,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74248 to 55757. [2021-06-05 14:15:14,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55757 states, 55756 states have (on average 7.122354544802353) internal successors, (397114), 55756 states have internal predecessors, (397114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:15:14,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55757 states to 55757 states and 397114 transitions. [2021-06-05 14:15:14,520 INFO L78 Accepts]: Start accepts. Automaton has 55757 states and 397114 transitions. Word has length 34 [2021-06-05 14:15:14,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:15:14,520 INFO L482 AbstractCegarLoop]: Abstraction has 55757 states and 397114 transitions. [2021-06-05 14:15:14,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:15:14,520 INFO L276 IsEmpty]: Start isEmpty. Operand 55757 states and 397114 transitions. [2021-06-05 14:15:14,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 14:15:14,679 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:15:14,679 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 14:15:14,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 14:15:14,880 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:15:14,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:15:14,880 INFO L82 PathProgramCache]: Analyzing trace with hash 759094517, now seen corresponding path program 30 times [2021-06-05 14:15:14,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:15:14,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126821235] [2021-06-05 14:15:14,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:15:14,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:15:14,900 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-06-05 14:15:14,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:15:14,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126821235] [2021-06-05 14:15:14,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126821235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:15:14,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509362472] [2021-06-05 14:15:14,901 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 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 14:15:14,934 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:15:14,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:15:14,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 14:15:14,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:15:14,998 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-06-05 14:15:14,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509362472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:15:14,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:15:14,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 14:15:14,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235784750] [2021-06-05 14:15:15,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:15:15,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:15:15,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:15:15,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:15:15,000 INFO L87 Difference]: Start difference. First operand 55757 states and 397114 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:15:16,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:15:16,330 INFO L93 Difference]: Finished difference Result 92909 states and 637114 transitions. [2021-06-05 14:15:16,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:15:16,331 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 14:15:16,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:15:16,700 INFO L225 Difference]: With dead ends: 92909 [2021-06-05 14:15:16,700 INFO L226 Difference]: Without dead ends: 68099 [2021-06-05 14:15:16,700 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 35.1ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:15:17,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68099 states. [2021-06-05 14:15:18,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68099 to 55757. [2021-06-05 14:15:18,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55757 states, 55756 states have (on average 7.012267738001292) internal successors, (390976), 55756 states have internal predecessors, (390976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:15:18,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55757 states to 55757 states and 390976 transitions. [2021-06-05 14:15:18,982 INFO L78 Accepts]: Start accepts. Automaton has 55757 states and 390976 transitions. Word has length 34 [2021-06-05 14:15:18,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:15:18,983 INFO L482 AbstractCegarLoop]: Abstraction has 55757 states and 390976 transitions. [2021-06-05 14:15:18,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:15:18,983 INFO L276 IsEmpty]: Start isEmpty. Operand 55757 states and 390976 transitions. [2021-06-05 14:15:19,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 14:15:19,147 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:15:19,147 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 14:15:19,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 14:15:19,353 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:15:19,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:15:19,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1460159095, now seen corresponding path program 31 times [2021-06-05 14:15:19,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:15:19,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518002952] [2021-06-05 14:15:19,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:15:19,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:15:19,371 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-06-05 14:15:19,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:15:19,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518002952] [2021-06-05 14:15:19,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518002952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:15:19,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896052771] [2021-06-05 14:15:19,372 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 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 14:15:19,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:15:19,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 14:15:19,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:15:19,468 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-06-05 14:15:19,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896052771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:15:19,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:15:19,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 14:15:19,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273412918] [2021-06-05 14:15:19,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:15:19,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:15:19,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:15:19,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:15:19,469 INFO L87 Difference]: Start difference. First operand 55757 states and 390976 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:15:20,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:15:20,636 INFO L93 Difference]: Finished difference Result 86696 states and 588891 transitions. [2021-06-05 14:15:20,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:15:20,636 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 14:15:20,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:15:20,962 INFO L225 Difference]: With dead ends: 86696 [2021-06-05 14:15:20,962 INFO L226 Difference]: Without dead ends: 71102 [2021-06-05 14:15:20,962 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 31.2ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:15:21,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71102 states. [2021-06-05 14:15:22,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71102 to 49619. [2021-06-05 14:15:22,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49619 states, 49618 states have (on average 6.850961344673304) internal successors, (339931), 49618 states have internal predecessors, (339931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:15:23,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49619 states to 49619 states and 339931 transitions. [2021-06-05 14:15:23,612 INFO L78 Accepts]: Start accepts. Automaton has 49619 states and 339931 transitions. Word has length 34 [2021-06-05 14:15:23,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:15:23,612 INFO L482 AbstractCegarLoop]: Abstraction has 49619 states and 339931 transitions. [2021-06-05 14:15:23,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:15:23,612 INFO L276 IsEmpty]: Start isEmpty. Operand 49619 states and 339931 transitions. [2021-06-05 14:15:23,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 14:15:23,759 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:15:23,759 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 14:15:23,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 14:15:23,959 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:15:23,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:15:23,959 INFO L82 PathProgramCache]: Analyzing trace with hash -351716319, now seen corresponding path program 32 times [2021-06-05 14:15:23,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:15:23,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814291051] [2021-06-05 14:15:23,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:15:23,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:15:23,981 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-06-05 14:15:23,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:15:23,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814291051] [2021-06-05 14:15:23,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814291051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:15:23,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44500487] [2021-06-05 14:15:23,981 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 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 14:15:24,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:15:24,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:15:24,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 14:15:24,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:15:24,074 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-06-05 14:15:24,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44500487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:15:24,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:15:24,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 14:15:24,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141469511] [2021-06-05 14:15:24,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:15:24,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:15:24,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:15:24,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:15:24,075 INFO L87 Difference]: Start difference. First operand 49619 states and 339931 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:15:25,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:15:25,070 INFO L93 Difference]: Finished difference Result 74312 states and 504788 transitions. [2021-06-05 14:15:25,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:15:25,071 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 14:15:25,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:15:25,374 INFO L225 Difference]: With dead ends: 74312 [2021-06-05 14:15:25,374 INFO L226 Difference]: Without dead ends: 61961 [2021-06-05 14:15:25,374 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 23.1ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:15:25,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61961 states. [2021-06-05 14:15:26,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61961 to 46550. [2021-06-05 14:15:26,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46550 states, 46549 states have (on average 6.78732088766676) internal successors, (315943), 46549 states have internal predecessors, (315943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:15:26,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46550 states to 46550 states and 315943 transitions. [2021-06-05 14:15:26,897 INFO L78 Accepts]: Start accepts. Automaton has 46550 states and 315943 transitions. Word has length 34 [2021-06-05 14:15:26,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:15:26,897 INFO L482 AbstractCegarLoop]: Abstraction has 46550 states and 315943 transitions. [2021-06-05 14:15:26,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:15:26,897 INFO L276 IsEmpty]: Start isEmpty. Operand 46550 states and 315943 transitions. [2021-06-05 14:15:27,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 14:15:27,015 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:15:27,015 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 14:15:27,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 14:15:27,217 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:15:27,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:15:27,217 INFO L82 PathProgramCache]: Analyzing trace with hash -744743329, now seen corresponding path program 33 times [2021-06-05 14:15:27,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:15:27,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069451320] [2021-06-05 14:15:27,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:15:27,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:15:27,238 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-06-05 14:15:27,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:15:27,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069451320] [2021-06-05 14:15:27,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069451320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:15:27,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189038195] [2021-06-05 14:15:27,238 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 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 14:15:27,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:15:27,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:15:27,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 14:15:27,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:15:27,336 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-06-05 14:15:27,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189038195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:15:27,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:15:27,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 14:15:27,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500906542] [2021-06-05 14:15:27,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:15:27,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:15:27,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:15:27,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:15:27,337 INFO L87 Difference]: Start difference. First operand 46550 states and 315943 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:15:28,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:15:28,412 INFO L93 Difference]: Finished difference Result 65072 states and 441884 transitions. [2021-06-05 14:15:28,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:15:28,412 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 14:15:28,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:15:28,707 INFO L225 Difference]: With dead ends: 65072 [2021-06-05 14:15:28,707 INFO L226 Difference]: Without dead ends: 58826 [2021-06-05 14:15:28,707 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 32.6ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:15:28,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58826 states. [2021-06-05 14:15:30,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58826 to 52688. [2021-06-05 14:15:30,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52688 states, 52687 states have (on average 6.79068840510942) internal successors, (357781), 52687 states have internal predecessors, (357781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:15:30,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52688 states to 52688 states and 357781 transitions. [2021-06-05 14:15:30,459 INFO L78 Accepts]: Start accepts. Automaton has 52688 states and 357781 transitions. Word has length 34 [2021-06-05 14:15:30,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:15:30,459 INFO L482 AbstractCegarLoop]: Abstraction has 52688 states and 357781 transitions. [2021-06-05 14:15:30,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:15:30,459 INFO L276 IsEmpty]: Start isEmpty. Operand 52688 states and 357781 transitions. [2021-06-05 14:15:31,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 14:15:31,076 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:15:31,076 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-06-05 14:15:31,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 14:15:31,292 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:15:31,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:15:31,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1952484644, now seen corresponding path program 34 times [2021-06-05 14:15:31,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:15:31,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839497522] [2021-06-05 14:15:31,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:15:31,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:15:31,324 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-06-05 14:15:31,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:15:31,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839497522] [2021-06-05 14:15:31,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839497522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:15:31,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982614712] [2021-06-05 14:15:31,324 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 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 14:15:31,376 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:15:31,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:15:31,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:15:31,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:15:31,465 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-06-05 14:15:31,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982614712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:15:31,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:15:31,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-06-05 14:15:31,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435255740] [2021-06-05 14:15:31,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:15:31,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:15:31,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:15:31,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:15:31,467 INFO L87 Difference]: Start difference. First operand 52688 states and 357781 transitions. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:15:33,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:15:33,576 INFO L93 Difference]: Finished difference Result 164151 states and 1080949 transitions. [2021-06-05 14:15:33,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 14:15:33,576 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 14:15:33,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:15:34,323 INFO L225 Difference]: With dead ends: 164151 [2021-06-05 14:15:34,323 INFO L226 Difference]: Without dead ends: 155058 [2021-06-05 14:15:34,323 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 216.5ms TimeCoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:15:35,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155058 states. [2021-06-05 14:15:38,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155058 to 98860. [2021-06-05 14:15:38,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98860 states, 98859 states have (on average 7.100709090725174) internal successors, (701969), 98859 states have internal predecessors, (701969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:15:39,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98860 states to 98860 states and 701969 transitions. [2021-06-05 14:15:39,311 INFO L78 Accepts]: Start accepts. Automaton has 98860 states and 701969 transitions. Word has length 35 [2021-06-05 14:15:39,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:15:39,311 INFO L482 AbstractCegarLoop]: Abstraction has 98860 states and 701969 transitions. [2021-06-05 14:15:39,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:15:39,311 INFO L276 IsEmpty]: Start isEmpty. Operand 98860 states and 701969 transitions. [2021-06-05 14:15:39,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 14:15:39,624 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:15:39,624 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 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] [2021-06-05 14:15:39,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 14:15:39,825 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:15:39,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:15:39,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1072335793, now seen corresponding path program 35 times [2021-06-05 14:15:39,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:15:39,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796647488] [2021-06-05 14:15:39,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:15:39,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:15:39,855 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-06-05 14:15:39,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:15:39,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796647488] [2021-06-05 14:15:39,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796647488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:15:39,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443096417] [2021-06-05 14:15:39,858 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 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 14:15:39,904 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:15:39,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:15:39,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:15:39,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:15:40,002 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-06-05 14:15:40,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443096417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:15:40,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:15:40,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2021-06-05 14:15:40,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562129195] [2021-06-05 14:15:40,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:15:40,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:15:40,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:15:40,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:15:40,003 INFO L87 Difference]: Start difference. First operand 98860 states and 701969 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:15:42,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:15:42,127 INFO L93 Difference]: Finished difference Result 144978 states and 989665 transitions. [2021-06-05 14:15:42,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:15:42,127 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 14:15:42,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:15:42,756 INFO L225 Difference]: With dead ends: 144978 [2021-06-05 14:15:42,756 INFO L226 Difference]: Without dead ends: 131912 [2021-06-05 14:15:42,757 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 58.9ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:15:42,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131912 states. [2021-06-05 14:15:45,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131912 to 102815. [2021-06-05 14:15:45,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102815 states, 102814 states have (on average 7.039090007197464) internal successors, (723717), 102814 states have internal predecessors, (723717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:15:47,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102815 states to 102815 states and 723717 transitions. [2021-06-05 14:15:47,060 INFO L78 Accepts]: Start accepts. Automaton has 102815 states and 723717 transitions. Word has length 36 [2021-06-05 14:15:47,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:15:47,060 INFO L482 AbstractCegarLoop]: Abstraction has 102815 states and 723717 transitions. [2021-06-05 14:15:47,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:15:47,060 INFO L276 IsEmpty]: Start isEmpty. Operand 102815 states and 723717 transitions. [2021-06-05 14:15:47,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 14:15:47,411 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:15:47,411 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 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] [2021-06-05 14:15:47,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:15:47,611 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:15:47,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:15:47,612 INFO L82 PathProgramCache]: Analyzing trace with hash 776425721, now seen corresponding path program 36 times [2021-06-05 14:15:47,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:15:47,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572919281] [2021-06-05 14:15:47,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:15:47,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:15:47,652 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-06-05 14:15:47,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:15:47,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572919281] [2021-06-05 14:15:47,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572919281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:15:47,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602750958] [2021-06-05 14:15:47,652 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 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 14:15:47,689 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:15:47,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:15:47,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:15:47,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:15:47,796 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-06-05 14:15:47,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602750958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:15:47,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:15:47,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:15:47,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961808350] [2021-06-05 14:15:47,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:15:47,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:15:47,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:15:47,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:15:47,797 INFO L87 Difference]: Start difference. First operand 102815 states and 723717 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:15:49,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:15:49,789 INFO L93 Difference]: Finished difference Result 163299 states and 1102914 transitions. [2021-06-05 14:15:49,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:15:49,790 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 14:15:49,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:15:50,873 INFO L225 Difference]: With dead ends: 163299 [2021-06-05 14:15:50,873 INFO L226 Difference]: Without dead ends: 120510 [2021-06-05 14:15:50,873 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 141.7ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:15:51,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120510 states. [2021-06-05 14:15:53,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120510 to 87490. [2021-06-05 14:15:53,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87490 states, 87489 states have (on average 7.016344911931785) internal successors, (613853), 87489 states have internal predecessors, (613853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:15:54,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87490 states to 87490 states and 613853 transitions. [2021-06-05 14:15:54,338 INFO L78 Accepts]: Start accepts. Automaton has 87490 states and 613853 transitions. Word has length 36 [2021-06-05 14:15:54,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:15:54,338 INFO L482 AbstractCegarLoop]: Abstraction has 87490 states and 613853 transitions. [2021-06-05 14:15:54,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:15:54,338 INFO L276 IsEmpty]: Start isEmpty. Operand 87490 states and 613853 transitions. [2021-06-05 14:15:54,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 14:15:54,616 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:15:54,616 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 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] [2021-06-05 14:15:54,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:15:54,817 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:15:54,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:15:54,817 INFO L82 PathProgramCache]: Analyzing trace with hash -2001694799, now seen corresponding path program 37 times [2021-06-05 14:15:54,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:15:54,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839174430] [2021-06-05 14:15:54,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:15:54,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:15:54,851 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-06-05 14:15:54,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:15:54,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839174430] [2021-06-05 14:15:54,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839174430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:15:54,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999530254] [2021-06-05 14:15:54,851 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 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 14:15:54,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:15:54,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:15:54,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:15:55,010 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-06-05 14:15:55,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999530254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:15:55,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:15:55,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 12 [2021-06-05 14:15:55,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694460244] [2021-06-05 14:15:55,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:15:55,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:15:55,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:15:55,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:15:55,011 INFO L87 Difference]: Start difference. First operand 87490 states and 613853 transitions. Second operand has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:15:57,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:15:57,261 INFO L93 Difference]: Finished difference Result 148260 states and 994640 transitions. [2021-06-05 14:15:57,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:15:57,261 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 14:15:57,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:15:57,830 INFO L225 Difference]: With dead ends: 148260 [2021-06-05 14:15:57,830 INFO L226 Difference]: Without dead ends: 119736 [2021-06-05 14:15:57,830 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 91.2ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:15:57,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119736 states. [2021-06-05 14:16:00,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119736 to 88381. [2021-06-05 14:16:00,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88381 states, 88380 states have (on average 6.939499886852229) internal successors, (613313), 88380 states have internal predecessors, (613313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:16:01,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88381 states to 88381 states and 613313 transitions. [2021-06-05 14:16:01,219 INFO L78 Accepts]: Start accepts. Automaton has 88381 states and 613313 transitions. Word has length 36 [2021-06-05 14:16:01,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:16:01,220 INFO L482 AbstractCegarLoop]: Abstraction has 88381 states and 613313 transitions. [2021-06-05 14:16:01,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:16:01,220 INFO L276 IsEmpty]: Start isEmpty. Operand 88381 states and 613313 transitions. [2021-06-05 14:16:02,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 14:16:02,100 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:16:02,100 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 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] [2021-06-05 14:16:02,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:16:02,315 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:16:02,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:16:02,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1133140203, now seen corresponding path program 38 times [2021-06-05 14:16:02,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:16:02,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449457851] [2021-06-05 14:16:02,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:16:02,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:16:02,346 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-06-05 14:16:02,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:16:02,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449457851] [2021-06-05 14:16:02,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449457851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:16:02,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24364599] [2021-06-05 14:16:02,348 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 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 14:16:02,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:16:02,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:16:02,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:16:02,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:16:02,488 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-06-05 14:16:02,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24364599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:16:02,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:16:02,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 12 [2021-06-05 14:16:02,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483450758] [2021-06-05 14:16:02,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:16:02,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:16:02,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:16:02,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:16:02,490 INFO L87 Difference]: Start difference. First operand 88381 states and 613313 transitions. Second operand has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:16:04,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:16:04,397 INFO L93 Difference]: Finished difference Result 154610 states and 1027932 transitions. [2021-06-05 14:16:04,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:16:04,397 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 14:16:04,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:16:04,995 INFO L225 Difference]: With dead ends: 154610 [2021-06-05 14:16:04,995 INFO L226 Difference]: Without dead ends: 121821 [2021-06-05 14:16:04,995 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 99.1ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:16:05,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121821 states. [2021-06-05 14:16:07,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121821 to 88381. [2021-06-05 14:16:07,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88381 states, 88380 states have (on average 6.9149015614392395) internal successors, (611139), 88380 states have internal predecessors, (611139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:16:08,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88381 states to 88381 states and 611139 transitions. [2021-06-05 14:16:08,851 INFO L78 Accepts]: Start accepts. Automaton has 88381 states and 611139 transitions. Word has length 36 [2021-06-05 14:16:08,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:16:08,851 INFO L482 AbstractCegarLoop]: Abstraction has 88381 states and 611139 transitions. [2021-06-05 14:16:08,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:16:08,851 INFO L276 IsEmpty]: Start isEmpty. Operand 88381 states and 611139 transitions. [2021-06-05 14:16:09,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 14:16:09,176 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:16:09,176 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 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] [2021-06-05 14:16:09,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-06-05 14:16:09,393 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:16:09,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:16:09,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1642613293, now seen corresponding path program 39 times [2021-06-05 14:16:09,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:16:09,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504027942] [2021-06-05 14:16:09,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:16:09,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:16:09,431 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-06-05 14:16:09,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:16:09,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504027942] [2021-06-05 14:16:09,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504027942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:16:09,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245310785] [2021-06-05 14:16:09,432 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 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 14:16:09,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:16:09,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:16:09,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:16:09,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:16:09,559 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-06-05 14:16:09,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245310785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:16:09,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:16:09,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 13 [2021-06-05 14:16:09,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207584901] [2021-06-05 14:16:09,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:16:09,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:16:09,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:16:09,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:16:09,560 INFO L87 Difference]: Start difference. First operand 88381 states and 611139 transitions. Second operand has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:16:12,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:16:12,851 INFO L93 Difference]: Finished difference Result 188739 states and 1249534 transitions. [2021-06-05 14:16:12,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 14:16:12,851 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 14:16:12,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:16:13,786 INFO L225 Difference]: With dead ends: 188739 [2021-06-05 14:16:13,786 INFO L226 Difference]: Without dead ends: 177820 [2021-06-05 14:16:13,787 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 361.8ms TimeCoverageRelationStatistics Valid=250, Invalid=2300, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 14:16:13,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177820 states. [2021-06-05 14:16:17,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177820 to 108631. [2021-06-05 14:16:17,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108631 states, 108630 states have (on average 6.994228113780723) internal successors, (759783), 108630 states have internal predecessors, (759783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:16:18,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108631 states to 108631 states and 759783 transitions. [2021-06-05 14:16:18,864 INFO L78 Accepts]: Start accepts. Automaton has 108631 states and 759783 transitions. Word has length 36 [2021-06-05 14:16:18,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:16:18,864 INFO L482 AbstractCegarLoop]: Abstraction has 108631 states and 759783 transitions. [2021-06-05 14:16:18,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:16:18,864 INFO L276 IsEmpty]: Start isEmpty. Operand 108631 states and 759783 transitions. [2021-06-05 14:16:19,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 14:16:19,220 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:16:19,220 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:16:19,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:16:19,421 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:16:19,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:16:19,421 INFO L82 PathProgramCache]: Analyzing trace with hash -674266402, now seen corresponding path program 40 times [2021-06-05 14:16:19,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:16:19,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733914230] [2021-06-05 14:16:19,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:16:19,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:16:19,453 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-05 14:16:19,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:16:19,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733914230] [2021-06-05 14:16:19,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733914230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:16:19,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278254160] [2021-06-05 14:16:19,453 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 14:16:19,492 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:16:19,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:16:19,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:16:19,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:16:19,614 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-06-05 14:16:19,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278254160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:16:19,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:16:19,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-06-05 14:16:19,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112509835] [2021-06-05 14:16:19,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:16:19,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:16:19,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:16:19,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:16:19,615 INFO L87 Difference]: Start difference. First operand 108631 states and 759783 transitions. Second operand has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:16:23,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:16:23,137 INFO L93 Difference]: Finished difference Result 223476 states and 1495121 transitions. [2021-06-05 14:16:23,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:16:23,137 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 14:16:23,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:16:24,423 INFO L225 Difference]: With dead ends: 223476 [2021-06-05 14:16:24,423 INFO L226 Difference]: Without dead ends: 177390 [2021-06-05 14:16:24,423 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 126.6ms TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:16:24,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177390 states. [2021-06-05 14:16:28,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177390 to 106167. [2021-06-05 14:16:28,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106167 states, 106166 states have (on average 6.964772149275663) internal successors, (739422), 106166 states have internal predecessors, (739422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:16:29,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106167 states to 106167 states and 739422 transitions. [2021-06-05 14:16:29,291 INFO L78 Accepts]: Start accepts. Automaton has 106167 states and 739422 transitions. Word has length 37 [2021-06-05 14:16:29,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:16:29,291 INFO L482 AbstractCegarLoop]: Abstraction has 106167 states and 739422 transitions. [2021-06-05 14:16:29,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:16:29,291 INFO L276 IsEmpty]: Start isEmpty. Operand 106167 states and 739422 transitions. [2021-06-05 14:16:29,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 14:16:29,632 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:16:29,632 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:16:29,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:16:29,833 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:16:29,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:16:29,833 INFO L82 PathProgramCache]: Analyzing trace with hash 481122298, now seen corresponding path program 41 times [2021-06-05 14:16:29,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:16:29,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458603818] [2021-06-05 14:16:29,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:16:29,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:16:29,868 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-06-05 14:16:29,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:16:29,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458603818] [2021-06-05 14:16:29,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458603818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:16:29,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423300580] [2021-06-05 14:16:29,868 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 14:16:29,904 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:16:29,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:16:29,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:16:29,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:16:30,031 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-06-05 14:16:30,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423300580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:16:30,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:16:30,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-06-05 14:16:30,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724151061] [2021-06-05 14:16:30,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:16:30,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:16:30,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:16:30,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:16:30,032 INFO L87 Difference]: Start difference. First operand 106167 states and 739422 transitions. Second operand has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:16:32,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:16:32,465 INFO L93 Difference]: Finished difference Result 191961 states and 1284744 transitions. [2021-06-05 14:16:32,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:16:32,465 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 14:16:32,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:16:33,253 INFO L225 Difference]: With dead ends: 191961 [2021-06-05 14:16:33,253 INFO L226 Difference]: Without dead ends: 159123 [2021-06-05 14:16:33,253 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 90.3ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:16:33,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159123 states. [2021-06-05 14:16:36,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159123 to 108827. [2021-06-05 14:16:37,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108827 states, 108826 states have (on average 6.872089390403029) internal successors, (747862), 108826 states have internal predecessors, (747862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:16:37,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108827 states to 108827 states and 747862 transitions. [2021-06-05 14:16:37,675 INFO L78 Accepts]: Start accepts. Automaton has 108827 states and 747862 transitions. Word has length 37 [2021-06-05 14:16:37,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:16:37,675 INFO L482 AbstractCegarLoop]: Abstraction has 108827 states and 747862 transitions. [2021-06-05 14:16:37,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:16:37,675 INFO L276 IsEmpty]: Start isEmpty. Operand 108827 states and 747862 transitions. [2021-06-05 14:16:38,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 14:16:38,571 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:16:38,571 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:16:38,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 14:16:38,788 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:16:38,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:16:38,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1867325692, now seen corresponding path program 42 times [2021-06-05 14:16:38,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:16:38,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317892889] [2021-06-05 14:16:38,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:16:38,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:16:38,824 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-05 14:16:38,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:16:38,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317892889] [2021-06-05 14:16:38,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317892889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:16:38,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398249841] [2021-06-05 14:16:38,824 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 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 14:16:38,876 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:16:38,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:16:38,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:16:38,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:16:38,979 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-06-05 14:16:38,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398249841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:16:38,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:16:38,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-05 14:16:38,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759108728] [2021-06-05 14:16:38,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:16:38,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:16:38,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:16:38,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:16:38,980 INFO L87 Difference]: Start difference. First operand 108827 states and 747862 transitions. Second operand has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:16:41,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:16:41,608 INFO L93 Difference]: Finished difference Result 190091 states and 1240020 transitions. [2021-06-05 14:16:41,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 14:16:41,609 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 14:16:41,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:16:42,826 INFO L225 Difference]: With dead ends: 190091 [2021-06-05 14:16:42,826 INFO L226 Difference]: Without dead ends: 137534 [2021-06-05 14:16:42,827 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1048 ImplicationChecksByTransitivity, 497.6ms TimeCoverageRelationStatistics Valid=334, Invalid=3206, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 14:16:42,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137534 states. [2021-06-05 14:16:45,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137534 to 99038. [2021-06-05 14:16:46,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99038 states, 99037 states have (on average 6.792249361349799) internal successors, (672684), 99037 states have internal predecessors, (672684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:16:46,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99038 states to 99038 states and 672684 transitions. [2021-06-05 14:16:46,659 INFO L78 Accepts]: Start accepts. Automaton has 99038 states and 672684 transitions. Word has length 37 [2021-06-05 14:16:46,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:16:46,659 INFO L482 AbstractCegarLoop]: Abstraction has 99038 states and 672684 transitions. [2021-06-05 14:16:46,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:16:46,659 INFO L276 IsEmpty]: Start isEmpty. Operand 99038 states and 672684 transitions. [2021-06-05 14:16:47,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 14:16:47,738 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:16:47,738 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:16:47,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 14:16:47,938 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:16:47,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:16:47,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1878928166, now seen corresponding path program 43 times [2021-06-05 14:16:47,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:16:47,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548808559] [2021-06-05 14:16:47,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:16:47,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:16:47,977 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-06-05 14:16:47,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:16:47,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548808559] [2021-06-05 14:16:47,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548808559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:16:47,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284044802] [2021-06-05 14:16:47,978 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 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 14:16:48,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:16:48,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:16:48,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:16:48,160 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-06-05 14:16:48,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284044802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:16:48,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:16:48,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:16:48,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791560483] [2021-06-05 14:16:48,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:16:48,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:16:48,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:16:48,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:16:48,161 INFO L87 Difference]: Start difference. First operand 99038 states and 672684 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:16:50,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:16:50,064 INFO L93 Difference]: Finished difference Result 147129 states and 986771 transitions. [2021-06-05 14:16:50,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:16:50,065 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 14:16:50,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:16:50,708 INFO L225 Difference]: With dead ends: 147129 [2021-06-05 14:16:50,708 INFO L226 Difference]: Without dead ends: 140734 [2021-06-05 14:16:50,708 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 179.5ms TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:16:50,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140734 states. [2021-06-05 14:16:53,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140734 to 99038. [2021-06-05 14:16:53,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99038 states, 99037 states have (on average 6.792249361349799) internal successors, (672684), 99037 states have internal predecessors, (672684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:16:54,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99038 states to 99038 states and 672684 transitions. [2021-06-05 14:16:54,889 INFO L78 Accepts]: Start accepts. Automaton has 99038 states and 672684 transitions. Word has length 37 [2021-06-05 14:16:54,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:16:54,890 INFO L482 AbstractCegarLoop]: Abstraction has 99038 states and 672684 transitions. [2021-06-05 14:16:54,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:16:54,890 INFO L276 IsEmpty]: Start isEmpty. Operand 99038 states and 672684 transitions. [2021-06-05 14:16:55,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 14:16:55,220 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:16:55,220 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:16:55,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 14:16:55,421 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:16:55,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:16:55,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1505483020, now seen corresponding path program 44 times [2021-06-05 14:16:55,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:16:55,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168628768] [2021-06-05 14:16:55,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:16:55,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:16:55,459 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-06-05 14:16:55,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:16:55,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168628768] [2021-06-05 14:16:55,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168628768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:16:55,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593975179] [2021-06-05 14:16:55,459 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 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 14:16:55,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:16:55,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:16:55,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:16:55,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:16:55,648 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-06-05 14:16:55,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593975179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:16:55,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:16:55,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:16:55,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507399483] [2021-06-05 14:16:55,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:16:55,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:16:55,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:16:55,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:16:55,649 INFO L87 Difference]: Start difference. First operand 99038 states and 672684 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:16:58,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:16:58,474 INFO L93 Difference]: Finished difference Result 210905 states and 1398862 transitions. [2021-06-05 14:16:58,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:16:58,475 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 14:16:58,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:16:59,367 INFO L225 Difference]: With dead ends: 210905 [2021-06-05 14:16:59,367 INFO L226 Difference]: Without dead ends: 177289 [2021-06-05 14:16:59,368 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 186.6ms TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:17:00,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177289 states. [2021-06-05 14:17:03,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177289 to 87818. [2021-06-05 14:17:03,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87818 states, 87817 states have (on average 6.753339330653518) internal successors, (593058), 87817 states have internal predecessors, (593058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:17:03,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87818 states to 87818 states and 593058 transitions. [2021-06-05 14:17:03,848 INFO L78 Accepts]: Start accepts. Automaton has 87818 states and 593058 transitions. Word has length 37 [2021-06-05 14:17:03,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:17:03,848 INFO L482 AbstractCegarLoop]: Abstraction has 87818 states and 593058 transitions. [2021-06-05 14:17:03,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:17:03,848 INFO L276 IsEmpty]: Start isEmpty. Operand 87818 states and 593058 transitions. [2021-06-05 14:17:04,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 14:17:04,126 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:17:04,126 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:17:04,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:17:04,327 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:17:04,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:17:04,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1404559502, now seen corresponding path program 45 times [2021-06-05 14:17:04,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:17:04,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875786330] [2021-06-05 14:17:04,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:17:04,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:17:04,362 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-06-05 14:17:04,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:17:04,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875786330] [2021-06-05 14:17:04,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875786330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:04,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78659061] [2021-06-05 14:17:04,362 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 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 14:17:04,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:17:04,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:17:04,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:17:04,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:17:04,526 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-06-05 14:17:04,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78659061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:04,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:17:04,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-05 14:17:04,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721046153] [2021-06-05 14:17:04,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:17:04,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:17:04,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:17:04,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:17:04,528 INFO L87 Difference]: Start difference. First operand 87818 states and 593058 transitions. Second operand has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:17:08,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:17:08,294 INFO L93 Difference]: Finished difference Result 192010 states and 1246834 transitions. [2021-06-05 14:17:08,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 14:17:08,295 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 14:17:08,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:17:09,842 INFO L225 Difference]: With dead ends: 192010 [2021-06-05 14:17:09,842 INFO L226 Difference]: Without dead ends: 178847 [2021-06-05 14:17:09,843 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1038 ImplicationChecksByTransitivity, 557.1ms TimeCoverageRelationStatistics Valid=263, Invalid=3397, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 14:17:10,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178847 states. [2021-06-05 14:17:13,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178847 to 100736. [2021-06-05 14:17:13,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100736 states, 100735 states have (on average 6.7786667990271505) internal successors, (682849), 100735 states have internal predecessors, (682849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:17:14,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100736 states to 100736 states and 682849 transitions. [2021-06-05 14:17:14,645 INFO L78 Accepts]: Start accepts. Automaton has 100736 states and 682849 transitions. Word has length 37 [2021-06-05 14:17:14,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:17:14,645 INFO L482 AbstractCegarLoop]: Abstraction has 100736 states and 682849 transitions. [2021-06-05 14:17:14,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:17:14,646 INFO L276 IsEmpty]: Start isEmpty. Operand 100736 states and 682849 transitions. [2021-06-05 14:17:15,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 14:17:15,023 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:17:15,023 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:17:15,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:17:15,223 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:17:15,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:17:15,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1180951440, now seen corresponding path program 46 times [2021-06-05 14:17:15,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:17:15,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703202672] [2021-06-05 14:17:15,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:17:15,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:17:15,256 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-06-05 14:17:15,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:17:15,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703202672] [2021-06-05 14:17:15,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703202672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:15,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762286499] [2021-06-05 14:17:15,256 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 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 14:17:15,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:17:15,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:17:15,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:17:15,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:17:15,396 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-06-05 14:17:15,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762286499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:15,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:17:15,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2021-06-05 14:17:15,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26360124] [2021-06-05 14:17:15,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:17:15,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:17:15,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:17:15,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:17:15,397 INFO L87 Difference]: Start difference. First operand 100736 states and 682849 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:17:17,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:17:17,538 INFO L93 Difference]: Finished difference Result 180763 states and 1186152 transitions. [2021-06-05 14:17:17,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:17:17,539 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 14:17:17,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:17:18,836 INFO L225 Difference]: With dead ends: 180763 [2021-06-05 14:17:18,836 INFO L226 Difference]: Without dead ends: 148324 [2021-06-05 14:17:18,836 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 98.5ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:17:19,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148324 states. [2021-06-05 14:17:21,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148324 to 100736. [2021-06-05 14:17:22,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100736 states, 100735 states have (on average 6.763855660892441) internal successors, (681357), 100735 states have internal predecessors, (681357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:17:23,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100736 states to 100736 states and 681357 transitions. [2021-06-05 14:17:23,352 INFO L78 Accepts]: Start accepts. Automaton has 100736 states and 681357 transitions. Word has length 37 [2021-06-05 14:17:23,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:17:23,352 INFO L482 AbstractCegarLoop]: Abstraction has 100736 states and 681357 transitions. [2021-06-05 14:17:23,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:17:23,352 INFO L276 IsEmpty]: Start isEmpty. Operand 100736 states and 681357 transitions. [2021-06-05 14:17:23,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 14:17:23,700 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:17:23,700 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:17:23,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:17:23,900 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:17:23,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:17:23,901 INFO L82 PathProgramCache]: Analyzing trace with hash -25562740, now seen corresponding path program 47 times [2021-06-05 14:17:23,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:17:23,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428660483] [2021-06-05 14:17:23,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:17:23,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:17:23,929 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-06-05 14:17:23,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:17:23,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428660483] [2021-06-05 14:17:23,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428660483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:23,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632198184] [2021-06-05 14:17:23,930 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 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 14:17:23,971 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:17:23,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:17:23,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:17:23,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:17:24,073 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-06-05 14:17:24,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632198184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:24,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:17:24,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 14:17:24,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630054253] [2021-06-05 14:17:24,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:17:24,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:17:24,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:17:24,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:17:24,074 INFO L87 Difference]: Start difference. First operand 100736 states and 681357 transitions. Second operand has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:17:28,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:17:28,418 INFO L93 Difference]: Finished difference Result 257569 states and 1635717 transitions. [2021-06-05 14:17:28,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 14:17:28,418 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 14:17:28,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:17:30,082 INFO L225 Difference]: With dead ends: 257569 [2021-06-05 14:17:30,082 INFO L226 Difference]: Without dead ends: 207928 [2021-06-05 14:17:30,082 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2250 ImplicationChecksByTransitivity, 775.0ms TimeCoverageRelationStatistics Valid=525, Invalid=6117, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 14:17:30,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207928 states. [2021-06-05 14:17:33,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207928 to 99243. [2021-06-05 14:17:33,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99243 states, 99242 states have (on average 6.815461195864654) internal successors, (676380), 99242 states have internal predecessors, (676380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:17:35,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99243 states to 99243 states and 676380 transitions. [2021-06-05 14:17:35,042 INFO L78 Accepts]: Start accepts. Automaton has 99243 states and 676380 transitions. Word has length 37 [2021-06-05 14:17:35,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:17:35,042 INFO L482 AbstractCegarLoop]: Abstraction has 99243 states and 676380 transitions. [2021-06-05 14:17:35,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:17:35,042 INFO L276 IsEmpty]: Start isEmpty. Operand 99243 states and 676380 transitions. [2021-06-05 14:17:35,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 14:17:35,368 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:17:35,368 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:17:35,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:17:35,568 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:17:35,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:17:35,569 INFO L82 PathProgramCache]: Analyzing trace with hash -931167312, now seen corresponding path program 48 times [2021-06-05 14:17:35,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:17:35,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849088611] [2021-06-05 14:17:35,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:17:35,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:17:35,599 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-05 14:17:35,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:17:35,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849088611] [2021-06-05 14:17:35,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849088611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:35,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425532928] [2021-06-05 14:17:35,599 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 14:17:35,637 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:17:35,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:17:35,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:17:35,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:17:35,741 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-06-05 14:17:35,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425532928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:35,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:17:35,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 14:17:35,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36265954] [2021-06-05 14:17:35,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:17:35,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:17:35,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:17:35,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:17:35,742 INFO L87 Difference]: Start difference. First operand 99243 states and 676380 transitions. Second operand has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:17:41,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:17:41,030 INFO L93 Difference]: Finished difference Result 304259 states and 1944342 transitions. [2021-06-05 14:17:41,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-06-05 14:17:41,031 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 14:17:41,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:17:42,668 INFO L225 Difference]: With dead ends: 304259 [2021-06-05 14:17:42,668 INFO L226 Difference]: Without dead ends: 214089 [2021-06-05 14:17:42,669 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5022 ImplicationChecksByTransitivity, 1133.6ms TimeCoverageRelationStatistics Valid=1026, Invalid=11856, Unknown=0, NotChecked=0, Total=12882 [2021-06-05 14:17:42,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214089 states. [2021-06-05 14:17:46,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214089 to 120131. [2021-06-05 14:17:47,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120131 states, 120130 states have (on average 6.801115458253559) internal successors, (817018), 120130 states have internal predecessors, (817018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:17:47,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120131 states to 120131 states and 817018 transitions. [2021-06-05 14:17:47,842 INFO L78 Accepts]: Start accepts. Automaton has 120131 states and 817018 transitions. Word has length 37 [2021-06-05 14:17:47,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:17:47,842 INFO L482 AbstractCegarLoop]: Abstraction has 120131 states and 817018 transitions. [2021-06-05 14:17:47,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:17:47,842 INFO L276 IsEmpty]: Start isEmpty. Operand 120131 states and 817018 transitions. [2021-06-05 14:17:48,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 14:17:48,838 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:17:48,838 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:17:49,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-06-05 14:17:49,039 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:17:49,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:17:49,039 INFO L82 PathProgramCache]: Analyzing trace with hash -944253574, now seen corresponding path program 49 times [2021-06-05 14:17:49,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:17:49,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327324305] [2021-06-05 14:17:49,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:17:49,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:17:49,074 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-05 14:17:49,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:17:49,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327324305] [2021-06-05 14:17:49,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327324305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:49,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143721891] [2021-06-05 14:17:49,074 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 14:17:49,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:17:49,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:17:49,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:17:49,222 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-06-05 14:17:49,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143721891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:17:49,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:17:49,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 14:17:49,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905558743] [2021-06-05 14:17:49,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:17:49,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:17:49,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:17:49,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:17:49,223 INFO L87 Difference]: Start difference. First operand 120131 states and 817018 transitions. Second operand has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:17:54,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:17:54,597 INFO L93 Difference]: Finished difference Result 412845 states and 2712377 transitions. [2021-06-05 14:17:54,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:17:54,597 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 14:17:54,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:17:56,706 INFO L225 Difference]: With dead ends: 412845 [2021-06-05 14:17:56,707 INFO L226 Difference]: Without dead ends: 208159 [2021-06-05 14:17:56,707 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 315.4ms TimeCoverageRelationStatistics Valid=224, Invalid=898, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 14:17:57,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208159 states. [2021-06-05 14:18:01,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208159 to 81339. [2021-06-05 14:18:01,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81339 states, 81338 states have (on average 6.60852246182596) internal successors, (537524), 81338 states have internal predecessors, (537524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:18:01,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81339 states to 81339 states and 537524 transitions. [2021-06-05 14:18:01,937 INFO L78 Accepts]: Start accepts. Automaton has 81339 states and 537524 transitions. Word has length 37 [2021-06-05 14:18:01,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:18:01,937 INFO L482 AbstractCegarLoop]: Abstraction has 81339 states and 537524 transitions. [2021-06-05 14:18:01,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.357142857142857) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:18:01,938 INFO L276 IsEmpty]: Start isEmpty. Operand 81339 states and 537524 transitions. [2021-06-05 14:18:02,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 14:18:02,187 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:18:02,187 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:18:02,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:18:02,388 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:18:02,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:18:02,388 INFO L82 PathProgramCache]: Analyzing trace with hash -265285954, now seen corresponding path program 50 times [2021-06-05 14:18:02,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:18:02,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361886876] [2021-06-05 14:18:02,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:18:02,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:18:02,442 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-06-05 14:18:02,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:18:02,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361886876] [2021-06-05 14:18:02,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361886876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:18:02,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951591300] [2021-06-05 14:18:02,442 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 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 14:18:02,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:18:02,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:18:02,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:18:02,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:18:03,137 WARN L205 SmtUtils]: Spent 554.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-06-05 14:18:03,155 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-06-05 14:18:03,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951591300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:18:03,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:18:03,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:18:03,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802611827] [2021-06-05 14:18:03,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:18:03,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:18:03,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:18:03,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:18:03,156 INFO L87 Difference]: Start difference. First operand 81339 states and 537524 transitions. Second operand has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:18:04,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:18:04,189 INFO L93 Difference]: Finished difference Result 100680 states and 663750 transitions. [2021-06-05 14:18:04,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:18:04,190 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 14:18:04,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:18:05,071 INFO L225 Difference]: With dead ends: 100680 [2021-06-05 14:18:05,072 INFO L226 Difference]: Without dead ends: 93275 [2021-06-05 14:18:05,072 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 173.9ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:18:05,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93275 states. [2021-06-05 14:18:06,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93275 to 84323. [2021-06-05 14:18:06,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84323 states, 84322 states have (on average 6.609212305210977) internal successors, (557302), 84322 states have internal predecessors, (557302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:18:08,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84323 states to 84323 states and 557302 transitions. [2021-06-05 14:18:08,037 INFO L78 Accepts]: Start accepts. Automaton has 84323 states and 557302 transitions. Word has length 37 [2021-06-05 14:18:08,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:18:08,037 INFO L482 AbstractCegarLoop]: Abstraction has 84323 states and 557302 transitions. [2021-06-05 14:18:08,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:18:08,038 INFO L276 IsEmpty]: Start isEmpty. Operand 84323 states and 557302 transitions. [2021-06-05 14:18:08,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 14:18:08,331 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:18:08,332 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:18:08,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-05 14:18:08,532 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:18:08,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:18:08,532 INFO L82 PathProgramCache]: Analyzing trace with hash 941176573, now seen corresponding path program 51 times [2021-06-05 14:18:08,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:18:08,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516038227] [2021-06-05 14:18:08,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:18:08,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:18:08,571 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-06-05 14:18:08,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:18:08,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516038227] [2021-06-05 14:18:08,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516038227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:18:08,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659793880] [2021-06-05 14:18:08,572 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 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 14:18:08,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:18:08,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:18:08,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:18:08,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:18:08,717 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-06-05 14:18:08,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659793880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:18:08,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:18:08,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 14:18:08,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231429160] [2021-06-05 14:18:08,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:18:08,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:18:08,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:18:08,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:18:08,718 INFO L87 Difference]: Start difference. First operand 84323 states and 557302 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:18:10,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:18:10,395 INFO L93 Difference]: Finished difference Result 138523 states and 880908 transitions. [2021-06-05 14:18:10,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:18:10,395 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 14:18:10,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:18:10,976 INFO L225 Difference]: With dead ends: 138523 [2021-06-05 14:18:10,976 INFO L226 Difference]: Without dead ends: 121480 [2021-06-05 14:18:10,977 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 71.6ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:18:11,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121480 states. [2021-06-05 14:18:13,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121480 to 82775. [2021-06-05 14:18:13,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82775 states, 82774 states have (on average 6.541510619276584) internal successors, (541467), 82774 states have internal predecessors, (541467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:18:14,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82775 states to 82775 states and 541467 transitions. [2021-06-05 14:18:14,001 INFO L78 Accepts]: Start accepts. Automaton has 82775 states and 541467 transitions. Word has length 38 [2021-06-05 14:18:14,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:18:14,001 INFO L482 AbstractCegarLoop]: Abstraction has 82775 states and 541467 transitions. [2021-06-05 14:18:14,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:18:14,001 INFO L276 IsEmpty]: Start isEmpty. Operand 82775 states and 541467 transitions. [2021-06-05 14:18:14,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 14:18:14,875 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:18:14,875 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:18:15,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 14:18:15,079 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:18:15,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:18:15,079 INFO L82 PathProgramCache]: Analyzing trace with hash -329563039, now seen corresponding path program 52 times [2021-06-05 14:18:15,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:18:15,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544644655] [2021-06-05 14:18:15,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:18:15,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:18:15,102 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-06-05 14:18:15,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:18:15,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544644655] [2021-06-05 14:18:15,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544644655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:18:15,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176202071] [2021-06-05 14:18:15,103 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 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 14:18:15,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:18:15,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:18:15,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:18:15,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:18:15,228 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-06-05 14:18:15,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176202071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:18:15,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:18:15,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 14:18:15,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373385837] [2021-06-05 14:18:15,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:18:15,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:18:15,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:18:15,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:18:15,230 INFO L87 Difference]: Start difference. First operand 82775 states and 541467 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:18:16,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:18:16,801 INFO L93 Difference]: Finished difference Result 127682 states and 811850 transitions. [2021-06-05 14:18:16,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:18:16,802 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 14:18:16,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:18:17,298 INFO L225 Difference]: With dead ends: 127682 [2021-06-05 14:18:17,298 INFO L226 Difference]: Without dead ends: 107548 [2021-06-05 14:18:17,298 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 52.1ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:18:17,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107548 states. [2021-06-05 14:18:19,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107548 to 81227. [2021-06-05 14:18:19,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81227 states, 81226 states have (on average 6.471228424396129) internal successors, (525632), 81226 states have internal predecessors, (525632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:18:20,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81227 states to 81227 states and 525632 transitions. [2021-06-05 14:18:20,295 INFO L78 Accepts]: Start accepts. Automaton has 81227 states and 525632 transitions. Word has length 38 [2021-06-05 14:18:20,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:18:20,295 INFO L482 AbstractCegarLoop]: Abstraction has 81227 states and 525632 transitions. [2021-06-05 14:18:20,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:18:20,296 INFO L276 IsEmpty]: Start isEmpty. Operand 81227 states and 525632 transitions. [2021-06-05 14:18:20,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 14:18:20,533 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:18:20,533 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:18:20,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:18:20,734 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:18:20,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:18:20,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1350631393, now seen corresponding path program 53 times [2021-06-05 14:18:20,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:18:20,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264576227] [2021-06-05 14:18:20,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:18:20,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:18:20,760 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-06-05 14:18:20,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:18:20,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264576227] [2021-06-05 14:18:20,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264576227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:18:20,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239020514] [2021-06-05 14:18:20,761 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 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 14:18:20,799 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:18:20,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:18:20,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:18:20,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:18:20,882 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-06-05 14:18:20,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239020514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:18:20,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:18:20,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 14:18:20,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336856551] [2021-06-05 14:18:20,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:18:20,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:18:20,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:18:20,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:18:20,882 INFO L87 Difference]: Start difference. First operand 81227 states and 525632 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:18:22,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:18:22,253 INFO L93 Difference]: Finished difference Result 112190 states and 716949 transitions. [2021-06-05 14:18:22,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:18:22,254 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 14:18:22,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:18:22,758 INFO L225 Difference]: With dead ends: 112190 [2021-06-05 14:18:22,758 INFO L226 Difference]: Without dead ends: 109091 [2021-06-05 14:18:22,758 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 77.3ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:18:23,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109091 states. [2021-06-05 14:18:25,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109091 to 81227. [2021-06-05 14:18:25,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81227 states, 81226 states have (on average 6.471228424396129) internal successors, (525632), 81226 states have internal predecessors, (525632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:18:25,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81227 states to 81227 states and 525632 transitions. [2021-06-05 14:18:25,612 INFO L78 Accepts]: Start accepts. Automaton has 81227 states and 525632 transitions. Word has length 38 [2021-06-05 14:18:25,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:18:25,612 INFO L482 AbstractCegarLoop]: Abstraction has 81227 states and 525632 transitions. [2021-06-05 14:18:25,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:18:25,612 INFO L276 IsEmpty]: Start isEmpty. Operand 81227 states and 525632 transitions. [2021-06-05 14:18:26,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 14:18:26,479 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:18:26,479 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:18:26,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 14:18:26,693 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:18:26,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:18:26,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1112457229, now seen corresponding path program 54 times [2021-06-05 14:18:26,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:18:26,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398805276] [2021-06-05 14:18:26,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:18:26,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:18:26,732 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-06-05 14:18:26,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:18:26,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398805276] [2021-06-05 14:18:26,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398805276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:18:26,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654721835] [2021-06-05 14:18:26,733 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 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 14:18:26,768 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:18:26,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:18:26,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:18:26,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:18:26,856 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-06-05 14:18:26,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654721835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:18:26,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:18:26,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 14:18:26,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413334661] [2021-06-05 14:18:26,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:18:26,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:18:26,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:18:26,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:18:26,857 INFO L87 Difference]: Start difference. First operand 81227 states and 525632 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:18:28,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:18:28,499 INFO L93 Difference]: Finished difference Result 119937 states and 766726 transitions. [2021-06-05 14:18:28,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:18:28,499 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 14:18:28,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:18:29,030 INFO L225 Difference]: With dead ends: 119937 [2021-06-05 14:18:29,031 INFO L226 Difference]: Without dead ends: 116839 [2021-06-05 14:18:29,031 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 82.8ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:18:29,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116839 states. [2021-06-05 14:18:31,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116839 to 81227. [2021-06-05 14:18:31,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81227 states, 81226 states have (on average 6.471228424396129) internal successors, (525632), 81226 states have internal predecessors, (525632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:18:32,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81227 states to 81227 states and 525632 transitions. [2021-06-05 14:18:32,038 INFO L78 Accepts]: Start accepts. Automaton has 81227 states and 525632 transitions. Word has length 38 [2021-06-05 14:18:32,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:18:32,038 INFO L482 AbstractCegarLoop]: Abstraction has 81227 states and 525632 transitions. [2021-06-05 14:18:32,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:18:32,039 INFO L276 IsEmpty]: Start isEmpty. Operand 81227 states and 525632 transitions. [2021-06-05 14:18:32,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 14:18:32,283 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:18:32,283 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:18:32,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:18:32,485 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:18:32,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:18:32,485 INFO L82 PathProgramCache]: Analyzing trace with hash -881687477, now seen corresponding path program 55 times [2021-06-05 14:18:32,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:18:32,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194731110] [2021-06-05 14:18:32,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:18:32,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:18:32,507 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-06-05 14:18:32,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:18:32,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194731110] [2021-06-05 14:18:32,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194731110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:18:32,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119451026] [2021-06-05 14:18:32,507 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 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 14:18:32,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:18:32,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:18:32,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:18:32,615 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-06-05 14:18:32,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119451026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:18:32,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:18:32,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-06-05 14:18:32,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611596] [2021-06-05 14:18:32,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:18:32,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:18:32,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:18:32,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:18:32,616 INFO L87 Difference]: Start difference. First operand 81227 states and 525632 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:18:34,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:18:34,327 INFO L93 Difference]: Finished difference Result 113755 states and 717330 transitions. [2021-06-05 14:18:34,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:18:34,327 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 14:18:34,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:18:35,155 INFO L225 Difference]: With dead ends: 113755 [2021-06-05 14:18:35,155 INFO L226 Difference]: Without dead ends: 102909 [2021-06-05 14:18:35,155 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 62.4ms TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:18:35,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102909 states. [2021-06-05 14:18:37,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102909 to 81227. [2021-06-05 14:18:37,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81227 states, 81226 states have (on average 6.452170487282397) internal successors, (524084), 81226 states have internal predecessors, (524084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:18:38,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81227 states to 81227 states and 524084 transitions. [2021-06-05 14:18:38,279 INFO L78 Accepts]: Start accepts. Automaton has 81227 states and 524084 transitions. Word has length 38 [2021-06-05 14:18:38,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:18:38,280 INFO L482 AbstractCegarLoop]: Abstraction has 81227 states and 524084 transitions. [2021-06-05 14:18:38,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:18:38,280 INFO L276 IsEmpty]: Start isEmpty. Operand 81227 states and 524084 transitions. [2021-06-05 14:18:38,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 14:18:38,524 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:18:38,525 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:18:38,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-06-05 14:18:38,725 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:18:38,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:18:38,725 INFO L82 PathProgramCache]: Analyzing trace with hash 2142540207, now seen corresponding path program 56 times [2021-06-05 14:18:38,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:18:38,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55189810] [2021-06-05 14:18:38,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:18:38,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:18:38,747 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-06-05 14:18:38,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:18:38,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55189810] [2021-06-05 14:18:38,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55189810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:18:38,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933909591] [2021-06-05 14:18:38,748 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 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 14:18:38,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:18:38,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:18:38,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:18:38,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:18:38,855 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-06-05 14:18:38,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933909591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:18:38,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:18:38,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-06-05 14:18:38,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768239989] [2021-06-05 14:18:38,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:18:38,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:18:38,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:18:38,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:18:38,856 INFO L87 Difference]: Start difference. First operand 81227 states and 524084 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:18:40,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:18:40,180 INFO L93 Difference]: Finished difference Result 107558 states and 678750 transitions. [2021-06-05 14:18:40,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:18:40,180 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 14:18:40,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:18:40,656 INFO L225 Difference]: With dead ends: 107558 [2021-06-05 14:18:40,656 INFO L226 Difference]: Without dead ends: 99816 [2021-06-05 14:18:40,656 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 38.8ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:18:40,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99816 states. [2021-06-05 14:18:43,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99816 to 79679. [2021-06-05 14:18:43,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79679 states, 79678 states have (on average 6.398215316649514) internal successors, (509797), 79678 states have internal predecessors, (509797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:18:43,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79679 states to 79679 states and 509797 transitions. [2021-06-05 14:18:43,598 INFO L78 Accepts]: Start accepts. Automaton has 79679 states and 509797 transitions. Word has length 38 [2021-06-05 14:18:43,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:18:43,598 INFO L482 AbstractCegarLoop]: Abstraction has 79679 states and 509797 transitions. [2021-06-05 14:18:43,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:18:43,599 INFO L276 IsEmpty]: Start isEmpty. Operand 79679 states and 509797 transitions. [2021-06-05 14:18:44,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 14:18:44,451 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:18:44,451 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:18:44,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:18:44,652 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:18:44,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:18:44,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1121471853, now seen corresponding path program 57 times [2021-06-05 14:18:44,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:18:44,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900454977] [2021-06-05 14:18:44,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:18:44,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:18:44,676 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-06-05 14:18:44,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:18:44,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900454977] [2021-06-05 14:18:44,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900454977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:18:44,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93368038] [2021-06-05 14:18:44,677 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 14:18:44,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:18:44,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:18:44,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:18:44,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:18:44,803 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-06-05 14:18:44,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93368038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:18:44,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:18:44,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 14:18:44,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091005325] [2021-06-05 14:18:44,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:18:44,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:18:44,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:18:44,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:18:44,804 INFO L87 Difference]: Start difference. First operand 79679 states and 509797 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:18:46,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:18:46,640 INFO L93 Difference]: Finished difference Result 140075 states and 878174 transitions. [2021-06-05 14:18:46,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:18:46,640 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 14:18:46,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:18:47,168 INFO L225 Difference]: With dead ends: 140075 [2021-06-05 14:18:47,168 INFO L226 Difference]: Without dead ends: 105995 [2021-06-05 14:18:47,169 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 110.7ms TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:18:47,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105995 states. [2021-06-05 14:18:49,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105995 to 70391. [2021-06-05 14:18:49,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70391 states, 70390 states have (on average 6.35452479045319) internal successors, (447295), 70390 states have internal predecessors, (447295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:18:50,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70391 states to 70391 states and 447295 transitions. [2021-06-05 14:18:50,147 INFO L78 Accepts]: Start accepts. Automaton has 70391 states and 447295 transitions. Word has length 38 [2021-06-05 14:18:50,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:18:50,147 INFO L482 AbstractCegarLoop]: Abstraction has 70391 states and 447295 transitions. [2021-06-05 14:18:50,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:18:50,147 INFO L276 IsEmpty]: Start isEmpty. Operand 70391 states and 447295 transitions. [2021-06-05 14:18:50,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 14:18:50,359 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:18:50,360 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:18:50,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-06-05 14:18:50,560 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:18:50,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:18:50,560 INFO L82 PathProgramCache]: Analyzing trace with hash 554192305, now seen corresponding path program 58 times [2021-06-05 14:18:50,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:18:50,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262044302] [2021-06-05 14:18:50,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:18:50,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:18:50,589 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-06-05 14:18:50,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:18:50,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262044302] [2021-06-05 14:18:50,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262044302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:18:50,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388822781] [2021-06-05 14:18:50,589 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 14:18:50,626 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:18:50,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:18:50,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:18:50,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:18:50,720 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-06-05 14:18:50,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388822781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:18:50,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:18:50,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 14:18:50,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624313233] [2021-06-05 14:18:50,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:18:50,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:18:50,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:18:50,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:18:50,721 INFO L87 Difference]: Start difference. First operand 70391 states and 447295 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:18:51,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:18:51,908 INFO L93 Difference]: Finished difference Result 82778 states and 524444 transitions. [2021-06-05 14:18:51,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:18:51,908 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 14:18:51,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:18:52,248 INFO L225 Difference]: With dead ends: 82778 [2021-06-05 14:18:52,248 INFO L226 Difference]: Without dead ends: 79679 [2021-06-05 14:18:52,249 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 79.4ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:18:52,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79679 states. [2021-06-05 14:18:53,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79679 to 73487. [2021-06-05 14:18:54,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73487 states, 73486 states have (on average 6.349250197316496) internal successors, (466581), 73486 states have internal predecessors, (466581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:18:54,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73487 states to 73487 states and 466581 transitions. [2021-06-05 14:18:54,848 INFO L78 Accepts]: Start accepts. Automaton has 73487 states and 466581 transitions. Word has length 38 [2021-06-05 14:18:54,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:18:54,848 INFO L482 AbstractCegarLoop]: Abstraction has 73487 states and 466581 transitions. [2021-06-05 14:18:54,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:18:54,848 INFO L276 IsEmpty]: Start isEmpty. Operand 73487 states and 466581 transitions. [2021-06-05 14:18:55,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 14:18:55,061 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:18:55,061 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:18:55,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:18:55,261 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:18:55,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:18:55,261 INFO L82 PathProgramCache]: Analyzing trace with hash -41639662, now seen corresponding path program 59 times [2021-06-05 14:18:55,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:18:55,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732553424] [2021-06-05 14:18:55,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:18:55,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:18:55,300 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-06-05 14:18:55,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:18:55,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732553424] [2021-06-05 14:18:55,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732553424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:18:55,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715003870] [2021-06-05 14:18:55,301 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 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 14:18:55,339 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:18:55,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:18:55,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:18:55,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:18:55,496 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-06-05 14:18:55,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715003870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:18:55,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:18:55,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 10 [2021-06-05 14:18:55,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452760110] [2021-06-05 14:18:55,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:18:55,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:18:55,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:18:55,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:18:55,497 INFO L87 Difference]: Start difference. First operand 73487 states and 466581 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:18:57,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:18:57,114 INFO L93 Difference]: Finished difference Result 155912 states and 983338 transitions. [2021-06-05 14:18:57,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:18:57,115 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 14:18:57,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:18:58,269 INFO L225 Difference]: With dead ends: 155912 [2021-06-05 14:18:58,269 INFO L226 Difference]: Without dead ends: 151952 [2021-06-05 14:18:58,269 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 103.0ms TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:18:58,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151952 states. [2021-06-05 14:19:01,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151952 to 119841. [2021-06-05 14:19:01,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119841 states, 119840 states have (on average 6.5424148865153535) internal successors, (784043), 119840 states have internal predecessors, (784043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:19:02,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119841 states to 119841 states and 784043 transitions. [2021-06-05 14:19:02,763 INFO L78 Accepts]: Start accepts. Automaton has 119841 states and 784043 transitions. Word has length 39 [2021-06-05 14:19:02,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:19:02,763 INFO L482 AbstractCegarLoop]: Abstraction has 119841 states and 784043 transitions. [2021-06-05 14:19:02,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:19:02,763 INFO L276 IsEmpty]: Start isEmpty. Operand 119841 states and 784043 transitions. [2021-06-05 14:19:03,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 14:19:03,175 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:19:03,175 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:19:03,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-06-05 14:19:03,375 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:19:03,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:19:03,376 INFO L82 PathProgramCache]: Analyzing trace with hash -2062562636, now seen corresponding path program 60 times [2021-06-05 14:19:03,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:19:03,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693466994] [2021-06-05 14:19:03,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:19:03,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:19:03,413 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-06-05 14:19:03,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:19:03,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693466994] [2021-06-05 14:19:03,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693466994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:19:03,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279088884] [2021-06-05 14:19:03,414 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 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 14:19:03,457 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:19:03,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:19:03,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:19:03,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:19:03,593 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-06-05 14:19:03,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279088884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:19:03,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:19:03,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 13 [2021-06-05 14:19:03,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210037918] [2021-06-05 14:19:03,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:19:03,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:19:03,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:19:03,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:19:03,594 INFO L87 Difference]: Start difference. First operand 119841 states and 784043 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:19:08,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:19:08,577 INFO L93 Difference]: Finished difference Result 363219 states and 2317845 transitions. [2021-06-05 14:19:08,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 14:19:08,577 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 14:19:08,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:19:10,998 INFO L225 Difference]: With dead ends: 363219 [2021-06-05 14:19:10,998 INFO L226 Difference]: Without dead ends: 351491 [2021-06-05 14:19:10,999 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 428.2ms TimeCoverageRelationStatistics Valid=198, Invalid=2154, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 14:19:11,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351491 states. [2021-06-05 14:19:18,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351491 to 205350. [2021-06-05 14:19:19,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205350 states, 205349 states have (on average 6.88260960608525) internal successors, (1413337), 205349 states have internal predecessors, (1413337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:19:21,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205350 states to 205350 states and 1413337 transitions. [2021-06-05 14:19:21,835 INFO L78 Accepts]: Start accepts. Automaton has 205350 states and 1413337 transitions. Word has length 39 [2021-06-05 14:19:21,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:19:21,835 INFO L482 AbstractCegarLoop]: Abstraction has 205350 states and 1413337 transitions. [2021-06-05 14:19:21,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:19:21,836 INFO L276 IsEmpty]: Start isEmpty. Operand 205350 states and 1413337 transitions. [2021-06-05 14:19:23,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 14:19:23,691 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:19:23,691 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:19:23,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:19:23,905 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:19:23,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:19:23,905 INFO L82 PathProgramCache]: Analyzing trace with hash -828443812, now seen corresponding path program 61 times [2021-06-05 14:19:23,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:19:23,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470700523] [2021-06-05 14:19:23,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:19:23,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:19:23,961 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-06-05 14:19:23,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:19:23,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470700523] [2021-06-05 14:19:23,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470700523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:19:23,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461836129] [2021-06-05 14:19:23,962 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 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 14:19:24,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:19:24,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:19:24,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:19:24,144 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-06-05 14:19:24,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461836129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:19:24,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:19:24,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 14:19:24,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705468073] [2021-06-05 14:19:24,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:19:24,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:19:24,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:19:24,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:19:24,146 INFO L87 Difference]: Start difference. First operand 205350 states and 1413337 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:19:31,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:19:31,652 INFO L93 Difference]: Finished difference Result 505241 states and 3345930 transitions. [2021-06-05 14:19:31,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 14:19:31,652 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 14:19:31,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:19:35,174 INFO L225 Difference]: With dead ends: 505241 [2021-06-05 14:19:35,175 INFO L226 Difference]: Without dead ends: 471693 [2021-06-05 14:19:35,175 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 318.1ms TimeCoverageRelationStatistics Valid=154, Invalid=1178, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 14:19:35,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471693 states. [2021-06-05 14:19:46,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471693 to 273193. [2021-06-05 14:19:46,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273193 states, 273192 states have (on average 7.154719025447305) internal successors, (1954612), 273192 states have internal predecessors, (1954612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:19:49,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273193 states to 273193 states and 1954612 transitions. [2021-06-05 14:19:49,304 INFO L78 Accepts]: Start accepts. Automaton has 273193 states and 1954612 transitions. Word has length 39 [2021-06-05 14:19:49,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:19:49,304 INFO L482 AbstractCegarLoop]: Abstraction has 273193 states and 1954612 transitions. [2021-06-05 14:19:49,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:19:49,304 INFO L276 IsEmpty]: Start isEmpty. Operand 273193 states and 1954612 transitions. [2021-06-05 14:19:50,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 14:19:50,925 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:19:50,925 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:19:51,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 14:19:51,126 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:19:51,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:19:51,126 INFO L82 PathProgramCache]: Analyzing trace with hash -410626040, now seen corresponding path program 62 times [2021-06-05 14:19:51,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:19:51,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261651623] [2021-06-05 14:19:51,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:19:51,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:19:51,172 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-06-05 14:19:51,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:19:51,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261651623] [2021-06-05 14:19:51,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261651623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:19:51,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808578412] [2021-06-05 14:19:51,172 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 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 14:19:51,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:19:51,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:19:51,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:19:51,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:19:51,364 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-06-05 14:19:51,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808578412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:19:51,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:19:51,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 13 [2021-06-05 14:19:51,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252574658] [2021-06-05 14:19:51,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:19:51,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:19:51,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:19:51,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:19:51,365 INFO L87 Difference]: Start difference. First operand 273193 states and 1954612 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:19:59,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:19:59,959 INFO L93 Difference]: Finished difference Result 514006 states and 3547889 transitions. [2021-06-05 14:19:59,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 14:19:59,959 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 14:19:59,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:20:03,813 INFO L225 Difference]: With dead ends: 514006 [2021-06-05 14:20:03,814 INFO L226 Difference]: Without dead ends: 493775 [2021-06-05 14:20:03,814 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 504.6ms TimeCoverageRelationStatistics Valid=209, Invalid=2143, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 14:20:04,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493775 states. [2021-06-05 14:20:17,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493775 to 333832. [2021-06-05 14:20:18,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333832 states, 333831 states have (on average 7.313104534929351) internal successors, (2441341), 333831 states have internal predecessors, (2441341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:20:22,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333832 states to 333832 states and 2441341 transitions. [2021-06-05 14:20:22,457 INFO L78 Accepts]: Start accepts. Automaton has 333832 states and 2441341 transitions. Word has length 39 [2021-06-05 14:20:22,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:20:22,457 INFO L482 AbstractCegarLoop]: Abstraction has 333832 states and 2441341 transitions. [2021-06-05 14:20:22,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:20:22,457 INFO L276 IsEmpty]: Start isEmpty. Operand 333832 states and 2441341 transitions. [2021-06-05 14:20:23,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 14:20:23,829 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:20:23,829 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:20:24,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 14:20:24,030 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:20:24,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:20:24,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1520847550, now seen corresponding path program 63 times [2021-06-05 14:20:24,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:20:24,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021484220] [2021-06-05 14:20:24,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:20:24,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:20:24,067 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-06-05 14:20:24,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:20:24,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021484220] [2021-06-05 14:20:24,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021484220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:20:24,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511771583] [2021-06-05 14:20:24,067 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 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 14:20:24,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:20:24,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:20:24,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:20:24,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:20:24,248 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-06-05 14:20:24,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511771583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:20:24,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:20:24,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 13 [2021-06-05 14:20:24,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687647274] [2021-06-05 14:20:24,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:20:24,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:20:24,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:20:24,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:20:24,249 INFO L87 Difference]: Start difference. First operand 333832 states and 2441341 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:20:34,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:20:34,576 INFO L93 Difference]: Finished difference Result 673375 states and 4722113 transitions. [2021-06-05 14:20:34,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 14:20:34,577 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 14:20:34,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:20:42,726 INFO L225 Difference]: With dead ends: 673375 [2021-06-05 14:20:42,726 INFO L226 Difference]: Without dead ends: 650182 [2021-06-05 14:20:42,727 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 511.0ms TimeCoverageRelationStatistics Valid=209, Invalid=2143, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 14:20:44,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650182 states. [2021-06-05 14:21:00,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650182 to 443520. [2021-06-05 14:21:01,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443520 states, 443519 states have (on average 7.412081556821692) internal successors, (3287399), 443519 states have internal predecessors, (3287399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:21:06,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443520 states to 443520 states and 3287399 transitions. [2021-06-05 14:21:06,208 INFO L78 Accepts]: Start accepts. Automaton has 443520 states and 3287399 transitions. Word has length 39 [2021-06-05 14:21:06,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:21:06,208 INFO L482 AbstractCegarLoop]: Abstraction has 443520 states and 3287399 transitions. [2021-06-05 14:21:06,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:21:06,208 INFO L276 IsEmpty]: Start isEmpty. Operand 443520 states and 3287399 transitions. [2021-06-05 14:21:09,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 14:21:09,422 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:21:09,422 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:21:09,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 14:21:09,642 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:21:09,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:21:09,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1403202507, now seen corresponding path program 64 times [2021-06-05 14:21:09,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:21:09,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855081787] [2021-06-05 14:21:09,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:21:09,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:21:09,705 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-06-05 14:21:09,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:21:09,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855081787] [2021-06-05 14:21:09,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855081787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:21:09,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202563315] [2021-06-05 14:21:09,705 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 14:21:09,753 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:21:09,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:21:09,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:21:09,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:21:09,915 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-06-05 14:21:09,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202563315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:21:09,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:21:09,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2021-06-05 14:21:09,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132325847] [2021-06-05 14:21:09,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:21:09,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:21:09,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:21:09,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:21:09,916 INFO L87 Difference]: Start difference. First operand 443520 states and 3287399 transitions. Second operand has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:21:19,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:21:19,472 INFO L93 Difference]: Finished difference Result 620784 states and 4448544 transitions. [2021-06-05 14:21:19,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:21:19,472 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 14:21:19,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:21:25,984 INFO L225 Difference]: With dead ends: 620784 [2021-06-05 14:21:25,984 INFO L226 Difference]: Without dead ends: 578825 [2021-06-05 14:21:25,985 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 86.1ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:21:27,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578825 states. [2021-06-05 14:21:46,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578825 to 471074. [2021-06-05 14:21:47,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471074 states, 471073 states have (on average 7.345876329146438) internal successors, (3460444), 471073 states have internal predecessors, (3460444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:21:53,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471074 states to 471074 states and 3460444 transitions. [2021-06-05 14:21:53,481 INFO L78 Accepts]: Start accepts. Automaton has 471074 states and 3460444 transitions. Word has length 40 [2021-06-05 14:21:53,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:21:53,481 INFO L482 AbstractCegarLoop]: Abstraction has 471074 states and 3460444 transitions. [2021-06-05 14:21:53,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:21:53,481 INFO L276 IsEmpty]: Start isEmpty. Operand 471074 states and 3460444 transitions. [2021-06-05 14:21:57,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 14:21:57,138 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:21:57,138 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:21:57,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:21:57,354 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 14:21:57,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:21:57,354 INFO L82 PathProgramCache]: Analyzing trace with hash -780861053, now seen corresponding path program 65 times [2021-06-05 14:21:57,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:21:57,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922216267] [2021-06-05 14:21:57,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:21:57,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:21:57,431 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-06-05 14:21:57,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:21:57,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922216267] [2021-06-05 14:21:57,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922216267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:21:57,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282176163] [2021-06-05 14:21:57,431 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 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 14:21:57,469 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:21:57,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:21:57,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:21:57,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:21:58,329 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-06-05 14:21:58,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282176163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:21:58,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:21:58,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:21:58,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732049826] [2021-06-05 14:21:58,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:21:58,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:21:58,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:21:58,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:21:58,330 INFO L87 Difference]: Start difference. First operand 471074 states and 3460444 transitions. Second operand has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)