/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/parray-copy.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 06:58:01,452 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 06:58:01,460 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 06:58:01,480 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-05 06:58:01,481 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-05 06:58:01,481 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-05 06:58:01,482 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-05 06:58:01,484 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-05 06:58:01,485 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-05 06:58:01,486 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-05 06:58:01,486 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-05 06:58:01,487 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-05 06:58:01,487 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 06:58:01,488 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 06:58:01,489 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 06:58:01,489 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 06:58:01,490 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 06:58:01,490 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 06:58:01,491 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 06:58:01,492 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 06:58:01,493 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 06:58:01,496 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 06:58:01,497 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 06:58:01,497 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 06:58:01,499 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-06-05 06:58:01,499 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-06-05 06:58:01,500 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-06-05 06:58:01,500 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-06-05 06:58:01,501 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-06-05 06:58:01,501 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-06-05 06:58:01,501 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-05 06:58:01,502 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-05 06:58:01,503 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-05 06:58:01,503 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-05 06:58:01,504 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-05 06:58:01,504 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-05 06:58:01,504 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-05 06:58:01,505 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-06-05 06:58:01,505 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 06:58:01,505 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 06:58:01,506 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 06:58:01,507 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 06:58:01,523 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 06:58:01,523 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 06:58:01,524 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 06:58:01,524 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 06:58:01,525 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 06:58:01,525 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 06:58:01,525 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 06:58:01,525 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 06:58:01,525 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 06:58:01,526 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 06:58:01,526 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 06:58:01,526 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 06:58:01,526 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 06:58:01,526 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 06:58:01,526 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 06:58:01,526 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 06:58:01,527 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 06:58:01,527 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 06:58:01,527 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 06:58:01,527 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 06:58:01,527 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 06:58:01,527 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 06:58:01,528 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 06:58:01,528 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 06:58:01,528 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 06:58:01,528 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 06:58:01,528 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 06:58:01,528 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 06:58:01,528 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 06:58:01,529 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 06:58:01,529 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 06:58:01,529 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 06:58:01,755 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 06:58:01,770 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 06:58:01,772 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 06:58:01,772 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 06:58:01,774 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 06:58:01,775 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/parray-copy.wvr.bpl [2021-06-05 06:58:01,775 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/parray-copy.wvr.bpl' [2021-06-05 06:58:01,804 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 06:58:01,805 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 06:58:01,806 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 06:58:01,806 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 06:58:01,806 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 06:58:01,814 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:58:01" (1/1) ... [2021-06-05 06:58:01,819 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:58:01" (1/1) ... [2021-06-05 06:58:01,824 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 06:58:01,826 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 06:58:01,826 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 06:58:01,827 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 06:58:01,831 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:58:01" (1/1) ... [2021-06-05 06:58:01,832 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:58:01" (1/1) ... [2021-06-05 06:58:01,833 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:58:01" (1/1) ... [2021-06-05 06:58:01,833 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:58:01" (1/1) ... [2021-06-05 06:58:01,835 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:58:01" (1/1) ... [2021-06-05 06:58:01,839 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:58:01" (1/1) ... [2021-06-05 06:58:01,839 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:58:01" (1/1) ... [2021-06-05 06:58:01,840 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 06:58:01,841 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 06:58:01,841 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 06:58:01,841 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 06:58:01,843 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:58:01" (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 06:58:01,911 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 06:58:01,911 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 06:58:01,911 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 06:58:01,911 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 06:58:01,911 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 06:58:01,912 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 06:58:01,912 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 06:58:01,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 06:58:01,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 06:58:01,912 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 06:58:01,912 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 06:58:01,913 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 06:58:01,914 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 06:58:02,056 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 06:58:02,056 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 06:58:02,057 INFO L202 PluginConnector]: Adding new model parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 06:58:02 BoogieIcfgContainer [2021-06-05 06:58:02,058 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 06:58:02,059 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 06:58:02,059 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 06:58:02,061 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 06:58:02,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:58:01" (1/2) ... [2021-06-05 06:58:02,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@684d67a5 and model type parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 06:58:02, skipping insertion in model container [2021-06-05 06:58:02,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 06:58:02" (2/2) ... [2021-06-05 06:58:02,062 INFO L111 eAbstractionObserver]: Analyzing ICFG parray-copy.wvr.bpl [2021-06-05 06:58:02,066 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 06:58:02,066 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 06:58:02,066 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 06:58:02,066 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 06:58:02,111 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 06:58:02,125 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 06:58:02,157 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 06:58:02,157 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 06:58:02,157 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 06:58:02,157 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 06:58:02,157 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 06:58:02,158 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 06:58:02,158 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 06:58:02,158 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 06:58:02,163 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 38 places, 31 transitions, 86 flow [2021-06-05 06:58:02,191 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 116 states, 114 states have (on average 2.7719298245614037) internal successors, (316), 115 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:02,193 INFO L276 IsEmpty]: Start isEmpty. Operand has 116 states, 114 states have (on average 2.7719298245614037) internal successors, (316), 115 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:02,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 06:58:02,200 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:02,200 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] [2021-06-05 06:58:02,201 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:02,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:02,209 INFO L82 PathProgramCache]: Analyzing trace with hash -245139670, now seen corresponding path program 1 times [2021-06-05 06:58:02,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:02,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983976167] [2021-06-05 06:58:02,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:02,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:02,317 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 06:58:02,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:02,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983976167] [2021-06-05 06:58:02,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983976167] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:58:02,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:58:02,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 06:58:02,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119337717] [2021-06-05 06:58:02,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 06:58:02,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:02,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 06:58:02,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 06:58:02,332 INFO L87 Difference]: Start difference. First operand has 116 states, 114 states have (on average 2.7719298245614037) internal successors, (316), 115 states have internal predecessors, (316), 0 states have call successors, (0), 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 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:02,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:02,394 INFO L93 Difference]: Finished difference Result 156 states and 438 transitions. [2021-06-05 06:58:02,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 06:58:02,395 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 06:58:02,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:02,403 INFO L225 Difference]: With dead ends: 156 [2021-06-05 06:58:02,403 INFO L226 Difference]: Without dead ends: 156 [2021-06-05 06:58:02,404 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 06:58:02,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-06-05 06:58:02,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 135. [2021-06-05 06:58:02,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.8059701492537314) internal successors, (376), 134 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:02,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 376 transitions. [2021-06-05 06:58:02,437 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 376 transitions. Word has length 20 [2021-06-05 06:58:02,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:02,438 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 376 transitions. [2021-06-05 06:58:02,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:02,438 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 376 transitions. [2021-06-05 06:58:02,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 06:58:02,439 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:02,440 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 06:58:02,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 06:58:02,440 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:02,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:02,441 INFO L82 PathProgramCache]: Analyzing trace with hash -716869078, now seen corresponding path program 1 times [2021-06-05 06:58:02,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:02,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020323077] [2021-06-05 06:58:02,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:02,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:02,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:02,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:02,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020323077] [2021-06-05 06:58:02,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020323077] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:58:02,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:58:02,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 06:58:02,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553044632] [2021-06-05 06:58:02,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 06:58:02,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:02,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 06:58:02,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 06:58:02,475 INFO L87 Difference]: Start difference. First operand 135 states and 376 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:02,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:02,515 INFO L93 Difference]: Finished difference Result 160 states and 450 transitions. [2021-06-05 06:58:02,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 06:58:02,518 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 06:58:02,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:02,519 INFO L225 Difference]: With dead ends: 160 [2021-06-05 06:58:02,519 INFO L226 Difference]: Without dead ends: 160 [2021-06-05 06:58:02,520 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 06:58:02,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-06-05 06:58:02,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2021-06-05 06:58:02,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.830188679245283) internal successors, (450), 159 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:02,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 450 transitions. [2021-06-05 06:58:02,544 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 450 transitions. Word has length 22 [2021-06-05 06:58:02,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:02,545 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 450 transitions. [2021-06-05 06:58:02,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:02,545 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 450 transitions. [2021-06-05 06:58:02,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:58:02,546 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:02,546 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 06:58:02,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 06:58:02,546 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:02,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:02,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1666279556, now seen corresponding path program 1 times [2021-06-05 06:58:02,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:02,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813916653] [2021-06-05 06:58:02,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:02,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:02,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:02,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:02,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813916653] [2021-06-05 06:58:02,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813916653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:02,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138759399] [2021-06-05 06:58:02,825 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 06:58:02,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:02,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 06:58:02,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:03,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-05 06:58:03,211 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:03,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:03,222 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:58:03,222 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:20 [2021-06-05 06:58:03,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:03,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138759399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:03,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:03,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-06-05 06:58:03,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986425564] [2021-06-05 06:58:03,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:58:03,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:03,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:58:03,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:58:03,263 INFO L87 Difference]: Start difference. First operand 160 states and 450 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:03,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:03,685 INFO L93 Difference]: Finished difference Result 395 states and 1116 transitions. [2021-06-05 06:58:03,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:58:03,686 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:58:03,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:03,688 INFO L225 Difference]: With dead ends: 395 [2021-06-05 06:58:03,688 INFO L226 Difference]: Without dead ends: 280 [2021-06-05 06:58:03,689 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 530.6ms TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:58:03,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-06-05 06:58:03,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 194. [2021-06-05 06:58:03,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.8911917098445596) internal successors, (558), 193 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:03,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 558 transitions. [2021-06-05 06:58:03,699 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 558 transitions. Word has length 24 [2021-06-05 06:58:03,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:03,699 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 558 transitions. [2021-06-05 06:58:03,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:03,700 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 558 transitions. [2021-06-05 06:58:03,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:58:03,701 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:03,701 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 06:58:03,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-05 06:58:03,919 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:03,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:03,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1670859648, now seen corresponding path program 2 times [2021-06-05 06:58:03,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:03,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394227992] [2021-06-05 06:58:03,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:03,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:04,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:04,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:04,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394227992] [2021-06-05 06:58:04,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394227992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:04,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153657207] [2021-06-05 06:58:04,124 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 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 06:58:04,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:58:04,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:04,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 06:58:04,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:04,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-05 06:58:04,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:04,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:04,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:58:04,309 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:23 [2021-06-05 06:58:04,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:04,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153657207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:04,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:04,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 06:58:04,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981039643] [2021-06-05 06:58:04,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:58:04,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:04,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:58:04,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:58:04,404 INFO L87 Difference]: Start difference. First operand 194 states and 558 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:05,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:05,362 INFO L93 Difference]: Finished difference Result 639 states and 1800 transitions. [2021-06-05 06:58:05,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 06:58:05,363 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:58:05,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:05,365 INFO L225 Difference]: With dead ends: 639 [2021-06-05 06:58:05,365 INFO L226 Difference]: Without dead ends: 546 [2021-06-05 06:58:05,366 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 885.9ms TimeCoverageRelationStatistics Valid=307, Invalid=1253, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 06:58:05,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-06-05 06:58:05,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 281. [2021-06-05 06:58:05,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.8892857142857142) internal successors, (809), 280 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:05,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 809 transitions. [2021-06-05 06:58:05,377 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 809 transitions. Word has length 24 [2021-06-05 06:58:05,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:05,377 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 809 transitions. [2021-06-05 06:58:05,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:05,378 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 809 transitions. [2021-06-05 06:58:05,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:58:05,379 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:05,379 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] [2021-06-05 06:58:05,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:05,596 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:05,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:05,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1190941142, now seen corresponding path program 3 times [2021-06-05 06:58:05,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:05,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618643799] [2021-06-05 06:58:05,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:05,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:05,648 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:05,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:05,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618643799] [2021-06-05 06:58:05,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618643799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:05,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127476186] [2021-06-05 06:58:05,648 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 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 06:58:05,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 06:58:05,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:05,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 06:58:05,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:05,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-05 06:58:05,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:05,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:05,784 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:58:05,784 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:25 [2021-06-05 06:58:05,894 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 06:58:05,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127476186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:05,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:05,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 06:58:05,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026680958] [2021-06-05 06:58:05,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:58:05,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:05,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:58:05,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:58:05,896 INFO L87 Difference]: Start difference. First operand 281 states and 809 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 06:58:07,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:07,025 INFO L93 Difference]: Finished difference Result 1001 states and 2814 transitions. [2021-06-05 06:58:07,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 06:58:07,025 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 26 [2021-06-05 06:58:07,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:07,031 INFO L225 Difference]: With dead ends: 1001 [2021-06-05 06:58:07,033 INFO L226 Difference]: Without dead ends: 966 [2021-06-05 06:58:07,034 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 729.5ms TimeCoverageRelationStatistics Valid=549, Invalid=2757, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 06:58:07,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2021-06-05 06:58:07,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 305. [2021-06-05 06:58:07,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.924342105263158) internal successors, (889), 304 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:07,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 889 transitions. [2021-06-05 06:58:07,044 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 889 transitions. Word has length 26 [2021-06-05 06:58:07,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:07,045 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 889 transitions. [2021-06-05 06:58:07,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 06:58:07,045 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 889 transitions. [2021-06-05 06:58:07,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:58:07,046 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:07,046 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] [2021-06-05 06:58:07,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:07,256 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:07,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:07,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1175480346, now seen corresponding path program 4 times [2021-06-05 06:58:07,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:07,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156888187] [2021-06-05 06:58:07,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:07,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:07,303 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:07,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:07,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156888187] [2021-06-05 06:58:07,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156888187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:07,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702809199] [2021-06-05 06:58:07,304 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 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 06:58:07,408 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:58:07,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:07,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:58:07,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:07,522 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:07,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702809199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:07,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:07,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 06:58:07,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387861896] [2021-06-05 06:58:07,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:58:07,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:07,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:58:07,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:58:07,523 INFO L87 Difference]: Start difference. First operand 305 states and 889 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:08,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:08,240 INFO L93 Difference]: Finished difference Result 1201 states and 3376 transitions. [2021-06-05 06:58:08,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 06:58:08,241 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:58:08,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:08,245 INFO L225 Difference]: With dead ends: 1201 [2021-06-05 06:58:08,245 INFO L226 Difference]: Without dead ends: 1201 [2021-06-05 06:58:08,246 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 401.2ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 06:58:08,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2021-06-05 06:58:08,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 365. [2021-06-05 06:58:08,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 3.0961538461538463) internal successors, (1127), 364 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:08,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 1127 transitions. [2021-06-05 06:58:08,257 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 1127 transitions. Word has length 26 [2021-06-05 06:58:08,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:08,257 INFO L482 AbstractCegarLoop]: Abstraction has 365 states and 1127 transitions. [2021-06-05 06:58:08,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:08,257 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 1127 transitions. [2021-06-05 06:58:08,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:58:08,258 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:08,258 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] [2021-06-05 06:58:08,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:08,473 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:08,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:08,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1693913438, now seen corresponding path program 5 times [2021-06-05 06:58:08,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:08,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105943544] [2021-06-05 06:58:08,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:08,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:08,514 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:08,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:08,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105943544] [2021-06-05 06:58:08,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105943544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:08,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95986572] [2021-06-05 06:58:08,514 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 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 06:58:08,539 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:58:08,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:08,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:58:08,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:08,628 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:08,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95986572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:08,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:08,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 06:58:08,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802954642] [2021-06-05 06:58:08,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:58:08,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:08,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:58:08,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:58:08,629 INFO L87 Difference]: Start difference. First operand 365 states and 1127 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:09,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:09,290 INFO L93 Difference]: Finished difference Result 1858 states and 5235 transitions. [2021-06-05 06:58:09,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 06:58:09,290 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:58:09,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:09,297 INFO L225 Difference]: With dead ends: 1858 [2021-06-05 06:58:09,297 INFO L226 Difference]: Without dead ends: 1858 [2021-06-05 06:58:09,298 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 386.0ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 06:58:09,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2021-06-05 06:58:09,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 388. [2021-06-05 06:58:09,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 3.1834625322997416) internal successors, (1232), 387 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:09,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1232 transitions. [2021-06-05 06:58:09,314 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1232 transitions. Word has length 26 [2021-06-05 06:58:09,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:09,314 INFO L482 AbstractCegarLoop]: Abstraction has 388 states and 1232 transitions. [2021-06-05 06:58:09,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:09,314 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1232 transitions. [2021-06-05 06:58:09,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:58:09,315 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:09,315 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] [2021-06-05 06:58:09,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-06-05 06:58:09,529 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:09,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:09,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1481056820, now seen corresponding path program 6 times [2021-06-05 06:58:09,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:09,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744043637] [2021-06-05 06:58:09,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:09,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:09,573 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:09,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:09,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744043637] [2021-06-05 06:58:09,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744043637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:09,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340431128] [2021-06-05 06:58:09,573 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 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 06:58:09,608 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:58:09,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:09,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:58:09,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:09,682 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:09,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340431128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:09,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:09,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 06:58:09,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645963381] [2021-06-05 06:58:09,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:58:09,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:09,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:58:09,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:58:09,683 INFO L87 Difference]: Start difference. First operand 388 states and 1232 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:10,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:10,239 INFO L93 Difference]: Finished difference Result 1674 states and 4689 transitions. [2021-06-05 06:58:10,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 06:58:10,239 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:58:10,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:10,245 INFO L225 Difference]: With dead ends: 1674 [2021-06-05 06:58:10,245 INFO L226 Difference]: Without dead ends: 1670 [2021-06-05 06:58:10,245 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 316.1ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 06:58:10,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2021-06-05 06:58:10,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 402. [2021-06-05 06:58:10,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 3.1645885286783044) internal successors, (1269), 401 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:10,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1269 transitions. [2021-06-05 06:58:10,260 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1269 transitions. Word has length 26 [2021-06-05 06:58:10,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:10,260 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 1269 transitions. [2021-06-05 06:58:10,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:10,261 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1269 transitions. [2021-06-05 06:58:10,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:58:10,261 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:10,261 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] [2021-06-05 06:58:10,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:10,477 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:10,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:10,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1751566512, now seen corresponding path program 7 times [2021-06-05 06:58:10,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:10,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920102597] [2021-06-05 06:58:10,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:10,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:10,513 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:10,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:10,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920102597] [2021-06-05 06:58:10,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920102597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:10,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942967020] [2021-06-05 06:58:10,513 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 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 06:58:10,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:10,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:58:10,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:10,620 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:10,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942967020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:10,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:10,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 06:58:10,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185338215] [2021-06-05 06:58:10,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:58:10,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:10,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:58:10,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:58:10,623 INFO L87 Difference]: Start difference. First operand 402 states and 1269 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:11,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:11,212 INFO L93 Difference]: Finished difference Result 1844 states and 5052 transitions. [2021-06-05 06:58:11,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 06:58:11,213 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:58:11,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:11,219 INFO L225 Difference]: With dead ends: 1844 [2021-06-05 06:58:11,219 INFO L226 Difference]: Without dead ends: 1844 [2021-06-05 06:58:11,219 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 323.1ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 06:58:11,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2021-06-05 06:58:11,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 400. [2021-06-05 06:58:11,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 3.1679197994987467) internal successors, (1264), 399 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:11,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1264 transitions. [2021-06-05 06:58:11,234 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1264 transitions. Word has length 26 [2021-06-05 06:58:11,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:11,234 INFO L482 AbstractCegarLoop]: Abstraction has 400 states and 1264 transitions. [2021-06-05 06:58:11,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:11,234 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1264 transitions. [2021-06-05 06:58:11,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:58:11,235 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:11,235 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] [2021-06-05 06:58:11,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:11,449 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:11,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:11,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1992513178, now seen corresponding path program 8 times [2021-06-05 06:58:11,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:11,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239975209] [2021-06-05 06:58:11,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:11,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:11,489 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:11,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:11,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239975209] [2021-06-05 06:58:11,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239975209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:11,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371440857] [2021-06-05 06:58:11,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:11,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:58:11,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:11,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:58:11,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:11,604 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:11,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371440857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:11,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:11,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 06:58:11,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371910748] [2021-06-05 06:58:11,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:58:11,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:11,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:58:11,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:58:11,606 INFO L87 Difference]: Start difference. First operand 400 states and 1264 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:12,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:12,047 INFO L93 Difference]: Finished difference Result 1308 states and 3890 transitions. [2021-06-05 06:58:12,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 06:58:12,047 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:58:12,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:12,051 INFO L225 Difference]: With dead ends: 1308 [2021-06-05 06:58:12,051 INFO L226 Difference]: Without dead ends: 1308 [2021-06-05 06:58:12,052 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 281.0ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 06:58:12,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2021-06-05 06:58:12,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 415. [2021-06-05 06:58:12,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 3.2294685990338166) internal successors, (1337), 414 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:12,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1337 transitions. [2021-06-05 06:58:12,062 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1337 transitions. Word has length 26 [2021-06-05 06:58:12,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:12,062 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 1337 transitions. [2021-06-05 06:58:12,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:12,063 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1337 transitions. [2021-06-05 06:58:12,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:58:12,063 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:12,063 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] [2021-06-05 06:58:12,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 06:58:12,279 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:12,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:12,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1182457080, now seen corresponding path program 9 times [2021-06-05 06:58:12,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:12,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994119834] [2021-06-05 06:58:12,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:12,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:12,338 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:12,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:12,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994119834] [2021-06-05 06:58:12,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994119834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:12,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012354344] [2021-06-05 06:58:12,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:12,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:58:12,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:12,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:58:12,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:12,443 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:12,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012354344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:12,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:12,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 06:58:12,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591469223] [2021-06-05 06:58:12,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:58:12,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:12,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:58:12,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:58:12,444 INFO L87 Difference]: Start difference. First operand 415 states and 1337 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:12,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:12,790 INFO L93 Difference]: Finished difference Result 1124 states and 3354 transitions. [2021-06-05 06:58:12,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 06:58:12,790 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:58:12,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:12,794 INFO L225 Difference]: With dead ends: 1124 [2021-06-05 06:58:12,794 INFO L226 Difference]: Without dead ends: 1120 [2021-06-05 06:58:12,794 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 216.4ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:58:12,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2021-06-05 06:58:12,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 421. [2021-06-05 06:58:12,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 3.2333333333333334) internal successors, (1358), 420 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:12,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 1358 transitions. [2021-06-05 06:58:12,803 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 1358 transitions. Word has length 26 [2021-06-05 06:58:12,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:12,804 INFO L482 AbstractCegarLoop]: Abstraction has 421 states and 1358 transitions. [2021-06-05 06:58:12,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:12,804 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 1358 transitions. [2021-06-05 06:58:12,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:58:12,805 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:12,805 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] [2021-06-05 06:58:13,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:13,021 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:13,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:13,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1452966772, now seen corresponding path program 10 times [2021-06-05 06:58:13,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:13,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663263352] [2021-06-05 06:58:13,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:13,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:13,071 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:13,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:13,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663263352] [2021-06-05 06:58:13,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663263352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:13,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242523583] [2021-06-05 06:58:13,072 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 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 06:58:13,094 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:58:13,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:13,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:58:13,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:13,164 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:13,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242523583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:13,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:13,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 06:58:13,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917754597] [2021-06-05 06:58:13,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:58:13,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:13,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:58:13,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:58:13,165 INFO L87 Difference]: Start difference. First operand 421 states and 1358 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:13,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:13,542 INFO L93 Difference]: Finished difference Result 1207 states and 3549 transitions. [2021-06-05 06:58:13,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 06:58:13,542 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:58:13,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:13,546 INFO L225 Difference]: With dead ends: 1207 [2021-06-05 06:58:13,546 INFO L226 Difference]: Without dead ends: 1207 [2021-06-05 06:58:13,546 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 246.5ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:58:13,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1207 states. [2021-06-05 06:58:13,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1207 to 415. [2021-06-05 06:58:13,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 3.2294685990338166) internal successors, (1337), 414 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:13,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1337 transitions. [2021-06-05 06:58:13,556 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1337 transitions. Word has length 26 [2021-06-05 06:58:13,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:13,556 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 1337 transitions. [2021-06-05 06:58:13,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:13,556 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1337 transitions. [2021-06-05 06:58:13,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:58:13,557 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:13,557 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] [2021-06-05 06:58:13,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:13,773 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:13,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:13,773 INFO L82 PathProgramCache]: Analyzing trace with hash 2037994958, now seen corresponding path program 11 times [2021-06-05 06:58:13,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:13,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344949752] [2021-06-05 06:58:13,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:13,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:13,811 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:13,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:13,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344949752] [2021-06-05 06:58:13,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344949752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:13,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378822206] [2021-06-05 06:58:13,811 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 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 06:58:13,834 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:58:13,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:13,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:58:13,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:13,904 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:13,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378822206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:13,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:13,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 06:58:13,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311294131] [2021-06-05 06:58:13,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:58:13,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:13,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:58:13,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:58:13,906 INFO L87 Difference]: Start difference. First operand 415 states and 1337 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:14,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:14,109 INFO L93 Difference]: Finished difference Result 824 states and 2512 transitions. [2021-06-05 06:58:14,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:58:14,110 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:58:14,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:14,112 INFO L225 Difference]: With dead ends: 824 [2021-06-05 06:58:14,112 INFO L226 Difference]: Without dead ends: 812 [2021-06-05 06:58:14,113 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 128.3ms TimeCoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:58:14,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-06-05 06:58:14,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 433. [2021-06-05 06:58:14,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 3.2175925925925926) internal successors, (1390), 432 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:14,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1390 transitions. [2021-06-05 06:58:14,121 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1390 transitions. Word has length 26 [2021-06-05 06:58:14,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:14,121 INFO L482 AbstractCegarLoop]: Abstraction has 433 states and 1390 transitions. [2021-06-05 06:58:14,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:14,121 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1390 transitions. [2021-06-05 06:58:14,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:58:14,122 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:14,122 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] [2021-06-05 06:58:14,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-05 06:58:14,337 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:14,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:14,337 INFO L82 PathProgramCache]: Analyzing trace with hash 545990226, now seen corresponding path program 12 times [2021-06-05 06:58:14,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:14,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786261090] [2021-06-05 06:58:14,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:14,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:14,384 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:14,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:14,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786261090] [2021-06-05 06:58:14,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786261090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:14,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616809899] [2021-06-05 06:58:14,384 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 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 06:58:14,406 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:58:14,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:14,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:58:14,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:14,468 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:14,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616809899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:14,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:14,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 06:58:14,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037092976] [2021-06-05 06:58:14,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:58:14,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:14,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:58:14,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:58:14,469 INFO L87 Difference]: Start difference. First operand 433 states and 1390 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:14,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:14,761 INFO L93 Difference]: Finished difference Result 999 states and 2955 transitions. [2021-06-05 06:58:14,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:58:14,761 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:58:14,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:14,764 INFO L225 Difference]: With dead ends: 999 [2021-06-05 06:58:14,764 INFO L226 Difference]: Without dead ends: 995 [2021-06-05 06:58:14,765 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 157.4ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:58:14,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2021-06-05 06:58:14,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 472. [2021-06-05 06:58:14,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 3.2229299363057327) internal successors, (1518), 471 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:14,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1518 transitions. [2021-06-05 06:58:14,774 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1518 transitions. Word has length 26 [2021-06-05 06:58:14,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:14,774 INFO L482 AbstractCegarLoop]: Abstraction has 472 states and 1518 transitions. [2021-06-05 06:58:14,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:14,774 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1518 transitions. [2021-06-05 06:58:14,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:58:14,775 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:14,775 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] [2021-06-05 06:58:14,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 06:58:14,989 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:14,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:14,989 INFO L82 PathProgramCache]: Analyzing trace with hash 816499918, now seen corresponding path program 13 times [2021-06-05 06:58:14,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:14,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502903436] [2021-06-05 06:58:14,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:14,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:15,024 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:15,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:15,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502903436] [2021-06-05 06:58:15,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502903436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:15,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708390608] [2021-06-05 06:58:15,025 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 06:58:15,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:15,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:58:15,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:15,107 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:15,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708390608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:15,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:15,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 06:58:15,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258298027] [2021-06-05 06:58:15,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 06:58:15,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:15,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 06:58:15,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 06:58:15,109 INFO L87 Difference]: Start difference. First operand 472 states and 1518 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:15,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:15,450 INFO L93 Difference]: Finished difference Result 1053 states and 3099 transitions. [2021-06-05 06:58:15,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 06:58:15,450 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:58:15,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:15,453 INFO L225 Difference]: With dead ends: 1053 [2021-06-05 06:58:15,453 INFO L226 Difference]: Without dead ends: 1053 [2021-06-05 06:58:15,454 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 194.6ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:58:15,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2021-06-05 06:58:15,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 464. [2021-06-05 06:58:15,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.2311015118790496) internal successors, (1496), 463 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:15,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1496 transitions. [2021-06-05 06:58:15,463 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1496 transitions. Word has length 26 [2021-06-05 06:58:15,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:15,463 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 1496 transitions. [2021-06-05 06:58:15,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:15,463 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1496 transitions. [2021-06-05 06:58:15,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:58:15,464 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:15,464 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] [2021-06-05 06:58:15,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 06:58:15,680 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:15,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:15,680 INFO L82 PathProgramCache]: Analyzing trace with hash -980752764, now seen corresponding path program 1 times [2021-06-05 06:58:15,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:15,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218922509] [2021-06-05 06:58:15,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:15,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:15,952 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:15,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:15,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218922509] [2021-06-05 06:58:15,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218922509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:15,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305901036] [2021-06-05 06:58:15,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 06:58:15,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:15,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 06:58:16,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:16,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-05 06:58:16,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:16,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:16,174 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:58:16,174 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:20 [2021-06-05 06:58:16,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:16,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 06:58:16,215 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:16,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:16,225 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:58:16,225 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:27 [2021-06-05 06:58:16,274 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:16,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305901036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:16,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:16,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 06:58:16,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078989183] [2021-06-05 06:58:16,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:58:16,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:16,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:58:16,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:58:16,275 INFO L87 Difference]: Start difference. First operand 464 states and 1496 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 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 06:58:16,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:16,713 INFO L93 Difference]: Finished difference Result 853 states and 2545 transitions. [2021-06-05 06:58:16,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 06:58:16,714 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 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 06:58:16,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:16,716 INFO L225 Difference]: With dead ends: 853 [2021-06-05 06:58:16,716 INFO L226 Difference]: Without dead ends: 766 [2021-06-05 06:58:16,716 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 549.8ms TimeCoverageRelationStatistics Valid=193, Invalid=799, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:58:16,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2021-06-05 06:58:16,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 490. [2021-06-05 06:58:16,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 3.216768916155419) internal successors, (1573), 489 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:16,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1573 transitions. [2021-06-05 06:58:16,733 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1573 transitions. Word has length 28 [2021-06-05 06:58:16,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:16,733 INFO L482 AbstractCegarLoop]: Abstraction has 490 states and 1573 transitions. [2021-06-05 06:58:16,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 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 06:58:16,733 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1573 transitions. [2021-06-05 06:58:16,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:58:16,734 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:16,734 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] [2021-06-05 06:58:16,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:16,935 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:16,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:16,935 INFO L82 PathProgramCache]: Analyzing trace with hash 735427332, now seen corresponding path program 2 times [2021-06-05 06:58:16,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:16,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500380448] [2021-06-05 06:58:16,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:16,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:17,204 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:17,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:17,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500380448] [2021-06-05 06:58:17,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500380448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:17,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136169734] [2021-06-05 06:58:17,205 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 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 06:58:17,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:58:17,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:17,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 06:58:17,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:17,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-05 06:58:17,313 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:17,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:17,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:58:17,322 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:25 [2021-06-05 06:58:17,389 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-06-05 06:58:17,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 06:58:17,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:17,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:17,399 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:58:17,399 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:29 [2021-06-05 06:58:17,477 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 06:58:17,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136169734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:17,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:17,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-06-05 06:58:17,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935718141] [2021-06-05 06:58:17,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:58:17,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:17,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:58:17,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:58:17,479 INFO L87 Difference]: Start difference. First operand 490 states and 1573 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 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 06:58:18,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:18,858 INFO L93 Difference]: Finished difference Result 1130 states and 3345 transitions. [2021-06-05 06:58:18,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 06:58:18,859 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 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 06:58:18,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:18,864 INFO L225 Difference]: With dead ends: 1130 [2021-06-05 06:58:18,864 INFO L226 Difference]: Without dead ends: 998 [2021-06-05 06:58:18,865 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 1263.7ms TimeCoverageRelationStatistics Valid=417, Invalid=2235, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 06:58:18,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2021-06-05 06:58:18,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 537. [2021-06-05 06:58:18,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 536 states have (on average 3.1940298507462686) internal successors, (1712), 536 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:18,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 1712 transitions. [2021-06-05 06:58:18,874 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 1712 transitions. Word has length 28 [2021-06-05 06:58:18,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:18,874 INFO L482 AbstractCegarLoop]: Abstraction has 537 states and 1712 transitions. [2021-06-05 06:58:18,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 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 06:58:18,874 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 1712 transitions. [2021-06-05 06:58:18,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:58:18,875 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:18,875 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] [2021-06-05 06:58:19,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 06:58:19,081 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:19,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:19,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1417721472, now seen corresponding path program 14 times [2021-06-05 06:58:19,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:19,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581423797] [2021-06-05 06:58:19,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:19,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:19,391 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:19,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:19,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581423797] [2021-06-05 06:58:19,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581423797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:19,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681871419] [2021-06-05 06:58:19,392 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 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 06:58:19,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:58:19,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:19,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 06:58:19,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:19,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-05 06:58:19,523 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:19,529 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:19,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:58:19,530 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:22 [2021-06-05 06:58:19,572 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-06-05 06:58:19,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 06:58:19,573 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:19,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:19,593 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:58:19,593 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:34 [2021-06-05 06:58:19,680 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 06:58:19,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681871419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:19,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:19,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 06:58:19,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005563139] [2021-06-05 06:58:19,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:58:19,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:19,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:58:19,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:58:19,681 INFO L87 Difference]: Start difference. First operand 537 states and 1712 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 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 06:58:20,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:20,879 INFO L93 Difference]: Finished difference Result 1024 states and 3050 transitions. [2021-06-05 06:58:20,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 06:58:20,879 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 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 28 [2021-06-05 06:58:20,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:20,881 INFO L225 Difference]: With dead ends: 1024 [2021-06-05 06:58:20,881 INFO L226 Difference]: Without dead ends: 946 [2021-06-05 06:58:20,881 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1101.7ms TimeCoverageRelationStatistics Valid=419, Invalid=1837, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 06:58:20,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-06-05 06:58:20,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 637. [2021-06-05 06:58:20,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 3.10062893081761) internal successors, (1972), 636 states have internal predecessors, (1972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:20,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1972 transitions. [2021-06-05 06:58:20,890 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1972 transitions. Word has length 28 [2021-06-05 06:58:20,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:20,891 INFO L482 AbstractCegarLoop]: Abstraction has 637 states and 1972 transitions. [2021-06-05 06:58:20,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 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 06:58:20,891 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1972 transitions. [2021-06-05 06:58:20,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:58:20,892 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:20,892 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] [2021-06-05 06:58:21,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 06:58:21,093 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:21,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:21,093 INFO L82 PathProgramCache]: Analyzing trace with hash 916230348, now seen corresponding path program 3 times [2021-06-05 06:58:21,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:21,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925850480] [2021-06-05 06:58:21,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:21,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:21,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:21,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:21,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925850480] [2021-06-05 06:58:21,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925850480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:21,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895236950] [2021-06-05 06:58:21,378 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 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 06:58:21,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 06:58:21,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:21,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 06:58:21,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:21,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-05 06:58:21,475 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:21,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:21,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:58:21,483 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:25 [2021-06-05 06:58:21,525 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-06-05 06:58:21,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 06:58:21,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:21,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:21,538 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:58:21,538 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:37 [2021-06-05 06:58:21,680 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 06:58:21,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895236950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:21,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:21,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-06-05 06:58:21,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327865800] [2021-06-05 06:58:21,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:58:21,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:21,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:58:21,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:58:21,681 INFO L87 Difference]: Start difference. First operand 637 states and 1972 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 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 06:58:23,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:23,840 INFO L93 Difference]: Finished difference Result 1838 states and 5313 transitions. [2021-06-05 06:58:23,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 06:58:23,840 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 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 06:58:23,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:23,843 INFO L225 Difference]: With dead ends: 1838 [2021-06-05 06:58:23,843 INFO L226 Difference]: Without dead ends: 1655 [2021-06-05 06:58:23,844 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 1768.0ms TimeCoverageRelationStatistics Valid=569, Invalid=3091, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 06:58:23,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1655 states. [2021-06-05 06:58:23,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1655 to 692. [2021-06-05 06:58:23,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 691 states have (on average 3.1577424023154848) internal successors, (2182), 691 states have internal predecessors, (2182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:23,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 2182 transitions. [2021-06-05 06:58:23,856 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 2182 transitions. Word has length 28 [2021-06-05 06:58:23,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:23,856 INFO L482 AbstractCegarLoop]: Abstraction has 692 states and 2182 transitions. [2021-06-05 06:58:23,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 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 06:58:23,856 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 2182 transitions. [2021-06-05 06:58:23,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:58:23,858 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:23,858 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] [2021-06-05 06:58:24,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:24,075 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:24,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:24,075 INFO L82 PathProgramCache]: Analyzing trace with hash 937707268, now seen corresponding path program 15 times [2021-06-05 06:58:24,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:24,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160698046] [2021-06-05 06:58:24,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:24,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:24,372 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:24,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:24,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160698046] [2021-06-05 06:58:24,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160698046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:24,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789065900] [2021-06-05 06:58:24,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 06:58:24,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:58:24,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:24,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 06:58:24,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:24,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-05 06:58:24,472 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:24,480 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:24,481 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:58:24,481 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:25 [2021-06-05 06:58:24,553 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-06-05 06:58:24,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 06:58:24,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:24,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:24,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:58:24,566 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:34 [2021-06-05 06:58:24,645 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 06:58:24,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789065900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:24,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:24,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-05 06:58:24,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048026462] [2021-06-05 06:58:24,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:58:24,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:24,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:58:24,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:58:24,646 INFO L87 Difference]: Start difference. First operand 692 states and 2182 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 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 06:58:25,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:25,872 INFO L93 Difference]: Finished difference Result 1136 states and 3439 transitions. [2021-06-05 06:58:25,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 06:58:25,873 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 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 28 [2021-06-05 06:58:25,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:25,874 INFO L225 Difference]: With dead ends: 1136 [2021-06-05 06:58:25,874 INFO L226 Difference]: Without dead ends: 1058 [2021-06-05 06:58:25,875 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 1104.8ms TimeCoverageRelationStatistics Valid=406, Invalid=2044, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 06:58:25,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2021-06-05 06:58:25,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 680. [2021-06-05 06:58:25,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 679 states have (on average 3.1723122238586154) internal successors, (2154), 679 states have internal predecessors, (2154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:25,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 2154 transitions. [2021-06-05 06:58:25,884 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 2154 transitions. Word has length 28 [2021-06-05 06:58:25,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:25,885 INFO L482 AbstractCegarLoop]: Abstraction has 680 states and 2154 transitions. [2021-06-05 06:58:25,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 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 06:58:25,885 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 2154 transitions. [2021-06-05 06:58:25,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:58:25,886 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:25,886 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] [2021-06-05 06:58:26,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:26,090 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:26,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:26,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1490293068, now seen corresponding path program 16 times [2021-06-05 06:58:26,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:26,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570405695] [2021-06-05 06:58:26,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:26,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:26,348 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:26,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:26,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570405695] [2021-06-05 06:58:26,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570405695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:26,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491206519] [2021-06-05 06:58:26,348 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 06:58:26,381 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:58:26,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:26,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 06:58:26,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:26,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 06:58:26,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:26,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:26,516 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:58:26,516 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:24 [2021-06-05 06:58:26,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:26,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-06-05 06:58:26,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:26,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:26,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:58:26,579 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:31 [2021-06-05 06:58:26,638 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:26,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491206519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:26,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:26,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2021-06-05 06:58:26,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342876000] [2021-06-05 06:58:26,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:58:26,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:26,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:58:26,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:58:26,639 INFO L87 Difference]: Start difference. First operand 680 states and 2154 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 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 06:58:28,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:28,455 INFO L93 Difference]: Finished difference Result 1629 states and 4937 transitions. [2021-06-05 06:58:28,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 06:58:28,456 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 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 06:58:28,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:28,458 INFO L225 Difference]: With dead ends: 1629 [2021-06-05 06:58:28,458 INFO L226 Difference]: Without dead ends: 1293 [2021-06-05 06:58:28,459 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 1642.3ms TimeCoverageRelationStatistics Valid=735, Invalid=3425, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 06:58:28,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1293 states. [2021-06-05 06:58:28,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1293 to 920. [2021-06-05 06:58:28,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 919 states have (on average 3.263329706202394) internal successors, (2999), 919 states have internal predecessors, (2999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:28,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 2999 transitions. [2021-06-05 06:58:28,472 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 2999 transitions. Word has length 28 [2021-06-05 06:58:28,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:28,472 INFO L482 AbstractCegarLoop]: Abstraction has 920 states and 2999 transitions. [2021-06-05 06:58:28,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 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 06:58:28,473 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 2999 transitions. [2021-06-05 06:58:28,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:58:28,474 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:28,474 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] [2021-06-05 06:58:28,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:28,683 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:28,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:28,684 INFO L82 PathProgramCache]: Analyzing trace with hash -836691140, now seen corresponding path program 4 times [2021-06-05 06:58:28,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:28,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498895115] [2021-06-05 06:58:28,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:28,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:29,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:29,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:29,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498895115] [2021-06-05 06:58:29,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498895115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:29,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440214501] [2021-06-05 06:58:29,043 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 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 06:58:29,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:58:29,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:29,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 06:58:29,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:29,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-05 06:58:29,150 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:29,156 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:29,157 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:58:29,157 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:20 [2021-06-05 06:58:29,209 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-06-05 06:58:29,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 06:58:29,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:29,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:29,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:58:29,218 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:29 [2021-06-05 06:58:29,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:58:29,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440214501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:29,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:29,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-06-05 06:58:29,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004492218] [2021-06-05 06:58:29,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:58:29,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:29,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:58:29,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:58:29,301 INFO L87 Difference]: Start difference. First operand 920 states and 2999 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 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 06:58:30,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:30,439 INFO L93 Difference]: Finished difference Result 1908 states and 5865 transitions. [2021-06-05 06:58:30,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 06:58:30,439 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 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 28 [2021-06-05 06:58:30,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:30,442 INFO L225 Difference]: With dead ends: 1908 [2021-06-05 06:58:30,442 INFO L226 Difference]: Without dead ends: 1792 [2021-06-05 06:58:30,443 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 1252.1ms TimeCoverageRelationStatistics Valid=320, Invalid=1402, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 06:58:30,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1792 states. [2021-06-05 06:58:30,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1792 to 1049. [2021-06-05 06:58:30,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1049 states, 1048 states have (on average 3.25381679389313) internal successors, (3410), 1048 states have internal predecessors, (3410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:30,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 3410 transitions. [2021-06-05 06:58:30,459 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 3410 transitions. Word has length 28 [2021-06-05 06:58:30,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:30,459 INFO L482 AbstractCegarLoop]: Abstraction has 1049 states and 3410 transitions. [2021-06-05 06:58:30,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 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 06:58:30,460 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 3410 transitions. [2021-06-05 06:58:30,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:58:30,461 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:30,461 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] [2021-06-05 06:58:30,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 06:58:30,669 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:30,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:30,669 INFO L82 PathProgramCache]: Analyzing trace with hash -556203584, now seen corresponding path program 5 times [2021-06-05 06:58:30,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:30,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494406216] [2021-06-05 06:58:30,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:30,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:30,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:30,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:30,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494406216] [2021-06-05 06:58:30,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494406216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:30,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874747846] [2021-06-05 06:58:30,897 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 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 06:58:30,922 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:58:30,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:30,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 06:58:30,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:30,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-05 06:58:30,995 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:30,999 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:30,999 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:58:31,000 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:17 [2021-06-05 06:58:31,045 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-06-05 06:58:31,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 06:58:31,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:31,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:31,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:58:31,057 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:32 [2021-06-05 06:58:31,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:31,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874747846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:31,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:31,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 06:58:31,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720854587] [2021-06-05 06:58:31,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:58:31,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:31,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:58:31,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:58:31,182 INFO L87 Difference]: Start difference. First operand 1049 states and 3410 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 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 06:58:32,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:32,941 INFO L93 Difference]: Finished difference Result 1982 states and 6072 transitions. [2021-06-05 06:58:32,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 06:58:32,941 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 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 06:58:32,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:32,944 INFO L225 Difference]: With dead ends: 1982 [2021-06-05 06:58:32,944 INFO L226 Difference]: Without dead ends: 1756 [2021-06-05 06:58:32,945 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 1615.9ms TimeCoverageRelationStatistics Valid=554, Invalid=2416, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 06:58:32,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1756 states. [2021-06-05 06:58:32,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1756 to 1070. [2021-06-05 06:58:32,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1070 states, 1069 states have (on average 3.2198316183348923) internal successors, (3442), 1069 states have internal predecessors, (3442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:32,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 3442 transitions. [2021-06-05 06:58:32,960 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 3442 transitions. Word has length 28 [2021-06-05 06:58:32,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:32,961 INFO L482 AbstractCegarLoop]: Abstraction has 1070 states and 3442 transitions. [2021-06-05 06:58:32,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 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 06:58:32,961 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 3442 transitions. [2021-06-05 06:58:32,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:58:32,962 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:32,962 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] [2021-06-05 06:58:33,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 06:58:33,177 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:33,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:33,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1520630964, now seen corresponding path program 6 times [2021-06-05 06:58:33,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:33,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945724168] [2021-06-05 06:58:33,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:33,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:33,479 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:33,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:33,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945724168] [2021-06-05 06:58:33,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945724168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:33,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863028556] [2021-06-05 06:58:33,479 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 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 06:58:33,502 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:58:33,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:33,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 06:58:33,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:33,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-05 06:58:33,590 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:33,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:33,597 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:58:33,597 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:23 [2021-06-05 06:58:33,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:33,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 06:58:33,626 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:33,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:33,637 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:58:33,637 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:30 [2021-06-05 06:58:33,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:33,700 INFO L354 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2021-06-05 06:58:33,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-06-05 06:58:33,701 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:33,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:33,713 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:58:33,713 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:42 [2021-06-05 06:58:33,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:33,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863028556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:33,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:33,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-06-05 06:58:33,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743130803] [2021-06-05 06:58:33,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:58:33,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:33,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:58:33,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:58:33,891 INFO L87 Difference]: Start difference. First operand 1070 states and 3442 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 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 06:58:35,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:35,366 INFO L93 Difference]: Finished difference Result 2007 states and 6151 transitions. [2021-06-05 06:58:35,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 06:58:35,366 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 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 06:58:35,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:35,369 INFO L225 Difference]: With dead ends: 2007 [2021-06-05 06:58:35,370 INFO L226 Difference]: Without dead ends: 1842 [2021-06-05 06:58:35,370 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 1312.5ms TimeCoverageRelationStatistics Valid=307, Invalid=2045, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 06:58:35,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1842 states. [2021-06-05 06:58:35,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1842 to 1157. [2021-06-05 06:58:35,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 1156 states have (on average 3.222318339100346) internal successors, (3725), 1156 states have internal predecessors, (3725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:35,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 3725 transitions. [2021-06-05 06:58:35,388 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 3725 transitions. Word has length 28 [2021-06-05 06:58:35,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:35,388 INFO L482 AbstractCegarLoop]: Abstraction has 1157 states and 3725 transitions. [2021-06-05 06:58:35,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 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 06:58:35,388 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 3725 transitions. [2021-06-05 06:58:35,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:58:35,390 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:35,390 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] [2021-06-05 06:58:35,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:35,601 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:35,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:35,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1530790852, now seen corresponding path program 7 times [2021-06-05 06:58:35,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:35,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059578960] [2021-06-05 06:58:35,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:35,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:35,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:35,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:35,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059578960] [2021-06-05 06:58:35,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059578960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:35,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442178926] [2021-06-05 06:58:35,901 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 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 06:58:35,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:35,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 06:58:35,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:36,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-05 06:58:36,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:36,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:36,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:58:36,033 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 06:58:36,062 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-06-05 06:58:36,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 06:58:36,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:36,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:36,076 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:58:36,076 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:37 [2021-06-05 06:58:36,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:58:36,121 INFO L354 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2021-06-05 06:58:36,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-06-05 06:58:36,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:36,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:36,134 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:58:36,134 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:44 [2021-06-05 06:58:36,267 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:36,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442178926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:36,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:36,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 06:58:36,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244903766] [2021-06-05 06:58:36,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:58:36,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:36,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:58:36,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:58:36,268 INFO L87 Difference]: Start difference. First operand 1157 states and 3725 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 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 06:58:36,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:36,965 INFO L93 Difference]: Finished difference Result 2244 states and 7072 transitions. [2021-06-05 06:58:36,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:58:36,965 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 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 06:58:36,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:36,968 INFO L225 Difference]: With dead ends: 2244 [2021-06-05 06:58:36,968 INFO L226 Difference]: Without dead ends: 1887 [2021-06-05 06:58:36,969 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 765.1ms TimeCoverageRelationStatistics Valid=247, Invalid=1085, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 06:58:36,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1887 states. [2021-06-05 06:58:36,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1887 to 1173. [2021-06-05 06:58:36,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1173 states, 1172 states have (on average 3.2380546075085324) internal successors, (3795), 1172 states have internal predecessors, (3795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:36,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 3795 transitions. [2021-06-05 06:58:36,986 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 3795 transitions. Word has length 28 [2021-06-05 06:58:36,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:36,986 INFO L482 AbstractCegarLoop]: Abstraction has 1173 states and 3795 transitions. [2021-06-05 06:58:36,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 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 06:58:36,986 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 3795 transitions. [2021-06-05 06:58:36,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:58:36,988 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:36,988 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] [2021-06-05 06:58:37,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 06:58:37,204 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:37,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:37,204 INFO L82 PathProgramCache]: Analyzing trace with hash 55569732, now seen corresponding path program 8 times [2021-06-05 06:58:37,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:37,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24459925] [2021-06-05 06:58:37,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:37,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:37,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:37,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:37,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24459925] [2021-06-05 06:58:37,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24459925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:37,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81066408] [2021-06-05 06:58:37,576 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 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 06:58:37,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:58:37,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:37,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 06:58:37,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:37,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-05 06:58:37,677 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:37,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:37,682 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:58:37,682 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:17 [2021-06-05 06:58:37,715 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-06-05 06:58:37,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 06:58:37,716 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:58:37,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:58:37,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:58:37,723 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:29 [2021-06-05 06:58:37,815 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:37,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81066408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:37,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:37,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2021-06-05 06:58:37,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30010340] [2021-06-05 06:58:37,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:58:37,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:37,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:58:37,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:58:37,817 INFO L87 Difference]: Start difference. First operand 1173 states and 3795 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 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 06:58:38,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:38,427 INFO L93 Difference]: Finished difference Result 2027 states and 6489 transitions. [2021-06-05 06:58:38,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:58:38,427 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 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 06:58:38,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:38,430 INFO L225 Difference]: With dead ends: 2027 [2021-06-05 06:58:38,430 INFO L226 Difference]: Without dead ends: 1705 [2021-06-05 06:58:38,430 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 750.6ms TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:58:38,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1705 states. [2021-06-05 06:58:38,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1705 to 1135. [2021-06-05 06:58:38,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1135 states, 1134 states have (on average 3.236331569664903) internal successors, (3670), 1134 states have internal predecessors, (3670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:38,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 3670 transitions. [2021-06-05 06:58:38,446 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 3670 transitions. Word has length 28 [2021-06-05 06:58:38,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:38,446 INFO L482 AbstractCegarLoop]: Abstraction has 1135 states and 3670 transitions. [2021-06-05 06:58:38,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 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 06:58:38,446 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 3670 transitions. [2021-06-05 06:58:38,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:58:38,447 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:38,447 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:38,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:38,661 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:38,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:38,661 INFO L82 PathProgramCache]: Analyzing trace with hash 915430826, now seen corresponding path program 9 times [2021-06-05 06:58:38,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:38,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336076757] [2021-06-05 06:58:38,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:38,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:38,701 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:38,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:38,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336076757] [2021-06-05 06:58:38,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336076757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:38,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988062781] [2021-06-05 06:58:38,702 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 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 06:58:38,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:58:38,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:38,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:58:38,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:38,834 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:58:38,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988062781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:38,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:38,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 06:58:38,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369284301] [2021-06-05 06:58:38,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:58:38,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:38,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:58:38,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:58:38,835 INFO L87 Difference]: Start difference. First operand 1135 states and 3670 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 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 06:58:39,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:39,980 INFO L93 Difference]: Finished difference Result 5166 states and 15294 transitions. [2021-06-05 06:58:39,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 06:58:39,981 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 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 06:58:39,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:39,986 INFO L225 Difference]: With dead ends: 5166 [2021-06-05 06:58:39,986 INFO L226 Difference]: Without dead ends: 5166 [2021-06-05 06:58:39,988 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2985 ImplicationChecksByTransitivity, 799.4ms TimeCoverageRelationStatistics Valid=1515, Invalid=6141, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 06:58:39,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5166 states. [2021-06-05 06:58:40,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5166 to 1295. [2021-06-05 06:58:40,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1295 states, 1294 states have (on average 3.3377125193199384) internal successors, (4319), 1294 states have internal predecessors, (4319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:40,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1295 states to 1295 states and 4319 transitions. [2021-06-05 06:58:40,021 INFO L78 Accepts]: Start accepts. Automaton has 1295 states and 4319 transitions. Word has length 30 [2021-06-05 06:58:40,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:40,021 INFO L482 AbstractCegarLoop]: Abstraction has 1295 states and 4319 transitions. [2021-06-05 06:58:40,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 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 06:58:40,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states and 4319 transitions. [2021-06-05 06:58:40,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:58:40,023 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:40,023 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:40,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 06:58:40,231 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:40,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:40,231 INFO L82 PathProgramCache]: Analyzing trace with hash 930891622, now seen corresponding path program 10 times [2021-06-05 06:58:40,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:40,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263817966] [2021-06-05 06:58:40,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:40,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:40,265 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:40,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:40,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263817966] [2021-06-05 06:58:40,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263817966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:40,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059447301] [2021-06-05 06:58:40,265 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 06:58:40,302 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:58:40,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:40,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:58:40,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:40,386 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:58:40,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059447301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:40,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:40,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 06:58:40,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130850973] [2021-06-05 06:58:40,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:58:40,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:40,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:58:40,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:58:40,388 INFO L87 Difference]: Start difference. First operand 1295 states and 4319 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 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 06:58:41,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:41,591 INFO L93 Difference]: Finished difference Result 5273 states and 15409 transitions. [2021-06-05 06:58:41,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 06:58:41,592 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 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 06:58:41,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:41,598 INFO L225 Difference]: With dead ends: 5273 [2021-06-05 06:58:41,598 INFO L226 Difference]: Without dead ends: 5273 [2021-06-05 06:58:41,599 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3083 ImplicationChecksByTransitivity, 781.1ms TimeCoverageRelationStatistics Valid=1548, Invalid=6284, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 06:58:41,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5273 states. [2021-06-05 06:58:41,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5273 to 1261. [2021-06-05 06:58:41,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1261 states, 1260 states have (on average 3.3119047619047617) internal successors, (4173), 1260 states have internal predecessors, (4173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:41,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 4173 transitions. [2021-06-05 06:58:41,632 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 4173 transitions. Word has length 30 [2021-06-05 06:58:41,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:41,632 INFO L482 AbstractCegarLoop]: Abstraction has 1261 states and 4173 transitions. [2021-06-05 06:58:41,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 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 06:58:41,632 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 4173 transitions. [2021-06-05 06:58:41,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:58:41,634 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:41,634 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:41,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 06:58:41,849 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:41,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:41,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1624165858, now seen corresponding path program 11 times [2021-06-05 06:58:41,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:41,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156057485] [2021-06-05 06:58:41,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:41,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:41,880 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:41,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:41,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156057485] [2021-06-05 06:58:41,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156057485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:41,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380252706] [2021-06-05 06:58:41,880 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 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 06:58:41,914 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 06:58:41,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:41,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:58:41,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:41,999 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:58:41,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380252706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:42,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:42,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 06:58:42,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624349490] [2021-06-05 06:58:42,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:58:42,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:42,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:58:42,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:58:42,000 INFO L87 Difference]: Start difference. First operand 1261 states and 4173 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 06:58:42,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:42,729 INFO L93 Difference]: Finished difference Result 3862 states and 11266 transitions. [2021-06-05 06:58:42,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 06:58:42,730 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:58:42,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:42,734 INFO L225 Difference]: With dead ends: 3862 [2021-06-05 06:58:42,734 INFO L226 Difference]: Without dead ends: 3862 [2021-06-05 06:58:42,735 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1240 ImplicationChecksByTransitivity, 441.4ms TimeCoverageRelationStatistics Valid=747, Invalid=2793, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 06:58:42,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3862 states. [2021-06-05 06:58:42,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3862 to 1267. [2021-06-05 06:58:42,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1267 states, 1266 states have (on average 3.3143759873617693) internal successors, (4196), 1266 states have internal predecessors, (4196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:42,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1267 states to 1267 states and 4196 transitions. [2021-06-05 06:58:42,759 INFO L78 Accepts]: Start accepts. Automaton has 1267 states and 4196 transitions. Word has length 30 [2021-06-05 06:58:42,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:42,759 INFO L482 AbstractCegarLoop]: Abstraction has 1267 states and 4196 transitions. [2021-06-05 06:58:42,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 06:58:42,759 INFO L276 IsEmpty]: Start isEmpty. Operand 1267 states and 4196 transitions. [2021-06-05 06:58:42,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:58:42,761 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:42,761 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:42,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 06:58:42,964 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:42,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:42,964 INFO L82 PathProgramCache]: Analyzing trace with hash 568788464, now seen corresponding path program 12 times [2021-06-05 06:58:42,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:42,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937328346] [2021-06-05 06:58:42,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:42,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:42,996 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:42,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:42,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937328346] [2021-06-05 06:58:42,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937328346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:42,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650642519] [2021-06-05 06:58:42,996 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 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 06:58:43,027 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:58:43,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:43,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:58:43,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:43,123 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:58:43,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650642519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:43,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:43,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 06:58:43,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150307557] [2021-06-05 06:58:43,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:58:43,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:43,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:58:43,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:58:43,125 INFO L87 Difference]: Start difference. First operand 1267 states and 4196 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 06:58:43,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:43,822 INFO L93 Difference]: Finished difference Result 3689 states and 10863 transitions. [2021-06-05 06:58:43,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 06:58:43,822 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:58:43,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:43,826 INFO L225 Difference]: With dead ends: 3689 [2021-06-05 06:58:43,826 INFO L226 Difference]: Without dead ends: 3673 [2021-06-05 06:58:43,826 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 427.6ms TimeCoverageRelationStatistics Valid=710, Invalid=2482, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 06:58:43,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3673 states. [2021-06-05 06:58:43,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3673 to 1255. [2021-06-05 06:58:43,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1255 states, 1254 states have (on average 3.3038277511961724) internal successors, (4143), 1254 states have internal predecessors, (4143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:43,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1255 states to 1255 states and 4143 transitions. [2021-06-05 06:58:43,850 INFO L78 Accepts]: Start accepts. Automaton has 1255 states and 4143 transitions. Word has length 30 [2021-06-05 06:58:43,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:43,850 INFO L482 AbstractCegarLoop]: Abstraction has 1255 states and 4143 transitions. [2021-06-05 06:58:43,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 06:58:43,850 INFO L276 IsEmpty]: Start isEmpty. Operand 1255 states and 4143 transitions. [2021-06-05 06:58:43,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:58:43,851 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:43,852 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:44,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:44,052 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:44,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:44,052 INFO L82 PathProgramCache]: Analyzing trace with hash -707538508, now seen corresponding path program 13 times [2021-06-05 06:58:44,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:44,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127061864] [2021-06-05 06:58:44,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:44,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:44,083 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:44,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:44,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127061864] [2021-06-05 06:58:44,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127061864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:44,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877985412] [2021-06-05 06:58:44,083 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:44,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:44,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:58:44,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:44,185 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:58:44,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877985412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:44,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:44,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 06:58:44,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832399882] [2021-06-05 06:58:44,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:58:44,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:44,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:58:44,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:58:44,186 INFO L87 Difference]: Start difference. First operand 1255 states and 4143 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:44,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:44,829 INFO L93 Difference]: Finished difference Result 4077 states and 11802 transitions. [2021-06-05 06:58:44,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 06:58:44,829 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:58:44,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:44,833 INFO L225 Difference]: With dead ends: 4077 [2021-06-05 06:58:44,833 INFO L226 Difference]: Without dead ends: 4053 [2021-06-05 06:58:44,834 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 396.3ms TimeCoverageRelationStatistics Valid=680, Invalid=2400, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 06:58:44,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4053 states. [2021-06-05 06:58:44,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4053 to 1269. [2021-06-05 06:58:44,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1269 states, 1268 states have (on average 3.2981072555205047) internal successors, (4182), 1268 states have internal predecessors, (4182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:44,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1269 states to 1269 states and 4182 transitions. [2021-06-05 06:58:44,861 INFO L78 Accepts]: Start accepts. Automaton has 1269 states and 4182 transitions. Word has length 30 [2021-06-05 06:58:44,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:44,861 INFO L482 AbstractCegarLoop]: Abstraction has 1269 states and 4182 transitions. [2021-06-05 06:58:44,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:44,861 INFO L276 IsEmpty]: Start isEmpty. Operand 1269 states and 4182 transitions. [2021-06-05 06:58:44,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:58:44,863 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:44,863 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:45,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 06:58:45,070 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:45,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:45,071 INFO L82 PathProgramCache]: Analyzing trace with hash -437028816, now seen corresponding path program 14 times [2021-06-05 06:58:45,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:45,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107020300] [2021-06-05 06:58:45,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:45,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:45,104 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:45,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:45,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107020300] [2021-06-05 06:58:45,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107020300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:45,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354537049] [2021-06-05 06:58:45,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:45,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:58:45,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:45,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:58:45,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:45,205 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:58:45,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354537049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:45,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:45,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 06:58:45,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824655431] [2021-06-05 06:58:45,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:58:45,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:45,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:58:45,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:58:45,206 INFO L87 Difference]: Start difference. First operand 1269 states and 4182 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:45,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:45,904 INFO L93 Difference]: Finished difference Result 4229 states and 12165 transitions. [2021-06-05 06:58:45,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 06:58:45,905 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:58:45,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:45,918 INFO L225 Difference]: With dead ends: 4229 [2021-06-05 06:58:45,918 INFO L226 Difference]: Without dead ends: 4229 [2021-06-05 06:58:45,919 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1262 ImplicationChecksByTransitivity, 434.3ms TimeCoverageRelationStatistics Valid=757, Invalid=2783, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 06:58:45,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4229 states. [2021-06-05 06:58:45,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4229 to 1092. [2021-06-05 06:58:45,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1092 states, 1091 states have (on average 3.1631530705774518) internal successors, (3451), 1091 states have internal predecessors, (3451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:45,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1092 states to 1092 states and 3451 transitions. [2021-06-05 06:58:45,944 INFO L78 Accepts]: Start accepts. Automaton has 1092 states and 3451 transitions. Word has length 30 [2021-06-05 06:58:45,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:45,944 INFO L482 AbstractCegarLoop]: Abstraction has 1092 states and 3451 transitions. [2021-06-05 06:58:45,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:45,944 INFO L276 IsEmpty]: Start isEmpty. Operand 1092 states and 3451 transitions. [2021-06-05 06:58:45,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:58:45,945 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:45,945 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:46,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:46,165 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:46,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:46,165 INFO L82 PathProgramCache]: Analyzing trace with hash 333072554, now seen corresponding path program 15 times [2021-06-05 06:58:46,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:46,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376855151] [2021-06-05 06:58:46,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:46,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:46,199 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:46,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:46,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376855151] [2021-06-05 06:58:46,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376855151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:46,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005252413] [2021-06-05 06:58:46,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:46,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:58:46,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:46,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:58:46,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:46,322 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:58:46,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005252413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:46,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:46,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 06:58:46,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436904030] [2021-06-05 06:58:46,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:58:46,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:46,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:58:46,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:58:46,323 INFO L87 Difference]: Start difference. First operand 1092 states and 3451 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 06:58:47,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:47,079 INFO L93 Difference]: Finished difference Result 3880 states and 11526 transitions. [2021-06-05 06:58:47,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 06:58:47,079 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:58:47,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:47,083 INFO L225 Difference]: With dead ends: 3880 [2021-06-05 06:58:47,083 INFO L226 Difference]: Without dead ends: 3880 [2021-06-05 06:58:47,084 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1384 ImplicationChecksByTransitivity, 529.2ms TimeCoverageRelationStatistics Valid=788, Invalid=3244, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 06:58:47,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3880 states. [2021-06-05 06:58:47,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3880 to 1361. [2021-06-05 06:58:47,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1361 states, 1360 states have (on average 3.2536764705882355) internal successors, (4425), 1360 states have internal predecessors, (4425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:47,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1361 states to 1361 states and 4425 transitions. [2021-06-05 06:58:47,119 INFO L78 Accepts]: Start accepts. Automaton has 1361 states and 4425 transitions. Word has length 30 [2021-06-05 06:58:47,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:47,119 INFO L482 AbstractCegarLoop]: Abstraction has 1361 states and 4425 transitions. [2021-06-05 06:58:47,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 06:58:47,119 INFO L276 IsEmpty]: Start isEmpty. Operand 1361 states and 4425 transitions. [2021-06-05 06:58:47,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:58:47,121 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:47,121 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:47,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 06:58:47,326 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:47,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:47,326 INFO L82 PathProgramCache]: Analyzing trace with hash -722304840, now seen corresponding path program 16 times [2021-06-05 06:58:47,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:47,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519056107] [2021-06-05 06:58:47,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:47,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:47,356 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:47,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:47,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519056107] [2021-06-05 06:58:47,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519056107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:47,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395565955] [2021-06-05 06:58:47,356 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 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 06:58:47,378 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:58:47,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:47,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:58:47,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:47,457 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:58:47,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395565955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:47,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:47,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 06:58:47,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195511944] [2021-06-05 06:58:47,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:58:47,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:47,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:58:47,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:58:47,458 INFO L87 Difference]: Start difference. First operand 1361 states and 4425 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 06:58:48,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:48,115 INFO L93 Difference]: Finished difference Result 3700 states and 11089 transitions. [2021-06-05 06:58:48,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 06:58:48,115 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:58:48,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:48,120 INFO L225 Difference]: With dead ends: 3700 [2021-06-05 06:58:48,120 INFO L226 Difference]: Without dead ends: 3684 [2021-06-05 06:58:48,120 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 440.1ms TimeCoverageRelationStatistics Valid=675, Invalid=2517, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 06:58:48,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3684 states. [2021-06-05 06:58:48,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3684 to 1355. [2021-06-05 06:58:48,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1355 states, 1354 states have (on average 3.2511078286558344) internal successors, (4402), 1354 states have internal predecessors, (4402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:48,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1355 states to 1355 states and 4402 transitions. [2021-06-05 06:58:48,148 INFO L78 Accepts]: Start accepts. Automaton has 1355 states and 4402 transitions. Word has length 30 [2021-06-05 06:58:48,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:48,148 INFO L482 AbstractCegarLoop]: Abstraction has 1355 states and 4402 transitions. [2021-06-05 06:58:48,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 06:58:48,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1355 states and 4402 transitions. [2021-06-05 06:58:48,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:58:48,150 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:48,150 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:48,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 06:58:48,361 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:48,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:48,361 INFO L82 PathProgramCache]: Analyzing trace with hash 760830098, now seen corresponding path program 17 times [2021-06-05 06:58:48,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:48,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296313001] [2021-06-05 06:58:48,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:48,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:48,390 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:48,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:48,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296313001] [2021-06-05 06:58:48,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296313001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:48,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455029699] [2021-06-05 06:58:48,391 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 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 06:58:48,424 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:58:48,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:48,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:58:48,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:48,513 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:58:48,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455029699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:48,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:48,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 06:58:48,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808959830] [2021-06-05 06:58:48,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:58:48,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:48,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:58:48,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:58:48,514 INFO L87 Difference]: Start difference. First operand 1355 states and 4402 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:49,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:49,168 INFO L93 Difference]: Finished difference Result 3586 states and 10726 transitions. [2021-06-05 06:58:49,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 06:58:49,168 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:58:49,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:49,172 INFO L225 Difference]: With dead ends: 3586 [2021-06-05 06:58:49,172 INFO L226 Difference]: Without dead ends: 3538 [2021-06-05 06:58:49,173 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 399.6ms TimeCoverageRelationStatistics Valid=596, Invalid=2160, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 06:58:49,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3538 states. [2021-06-05 06:58:49,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3538 to 1367. [2021-06-05 06:58:49,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1367 states, 1366 states have (on average 3.2423133235724744) internal successors, (4429), 1366 states have internal predecessors, (4429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:49,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1367 states to 1367 states and 4429 transitions. [2021-06-05 06:58:49,195 INFO L78 Accepts]: Start accepts. Automaton has 1367 states and 4429 transitions. Word has length 30 [2021-06-05 06:58:49,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:49,196 INFO L482 AbstractCegarLoop]: Abstraction has 1367 states and 4429 transitions. [2021-06-05 06:58:49,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:49,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1367 states and 4429 transitions. [2021-06-05 06:58:49,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:58:49,197 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:49,197 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:49,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 06:58:49,398 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:49,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:49,398 INFO L82 PathProgramCache]: Analyzing trace with hash -150600370, now seen corresponding path program 18 times [2021-06-05 06:58:49,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:49,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244996814] [2021-06-05 06:58:49,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:49,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:49,429 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:49,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:49,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244996814] [2021-06-05 06:58:49,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244996814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:49,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802674557] [2021-06-05 06:58:49,429 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 06:58:49,454 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:58:49,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:49,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:58:49,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:49,520 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:58:49,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802674557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:49,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:49,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 06:58:49,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537594780] [2021-06-05 06:58:49,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:58:49,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:49,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:58:49,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:58:49,521 INFO L87 Difference]: Start difference. First operand 1367 states and 4429 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:50,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:50,133 INFO L93 Difference]: Finished difference Result 3947 states and 11608 transitions. [2021-06-05 06:58:50,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 06:58:50,133 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:58:50,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:50,138 INFO L225 Difference]: With dead ends: 3947 [2021-06-05 06:58:50,138 INFO L226 Difference]: Without dead ends: 3871 [2021-06-05 06:58:50,138 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 375.2ms TimeCoverageRelationStatistics Valid=584, Invalid=2172, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 06:58:50,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3871 states. [2021-06-05 06:58:50,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3871 to 1381. [2021-06-05 06:58:50,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1381 states, 1380 states have (on average 3.2405797101449276) internal successors, (4472), 1380 states have internal predecessors, (4472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:50,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1381 states to 1381 states and 4472 transitions. [2021-06-05 06:58:50,163 INFO L78 Accepts]: Start accepts. Automaton has 1381 states and 4472 transitions. Word has length 30 [2021-06-05 06:58:50,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:50,163 INFO L482 AbstractCegarLoop]: Abstraction has 1381 states and 4472 transitions. [2021-06-05 06:58:50,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:50,163 INFO L276 IsEmpty]: Start isEmpty. Operand 1381 states and 4472 transitions. [2021-06-05 06:58:50,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:58:50,165 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:50,165 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:50,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 06:58:50,380 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:50,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:50,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1642605102, now seen corresponding path program 19 times [2021-06-05 06:58:50,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:50,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584684833] [2021-06-05 06:58:50,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:50,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:50,412 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:50,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:50,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584684833] [2021-06-05 06:58:50,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584684833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:50,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870488201] [2021-06-05 06:58:50,413 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 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 06:58:50,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:50,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:58:50,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:50,499 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:58:50,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870488201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:50,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:50,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 06:58:50,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027321166] [2021-06-05 06:58:50,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:58:50,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:50,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:58:50,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:58:50,500 INFO L87 Difference]: Start difference. First operand 1381 states and 4472 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:51,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:51,107 INFO L93 Difference]: Finished difference Result 3759 states and 11296 transitions. [2021-06-05 06:58:51,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 06:58:51,107 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:58:51,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:51,111 INFO L225 Difference]: With dead ends: 3759 [2021-06-05 06:58:51,111 INFO L226 Difference]: Without dead ends: 3739 [2021-06-05 06:58:51,111 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 995 ImplicationChecksByTransitivity, 400.3ms TimeCoverageRelationStatistics Valid=649, Invalid=2431, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 06:58:51,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3739 states. [2021-06-05 06:58:51,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3739 to 1571. [2021-06-05 06:58:51,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1571 states, 1570 states have (on average 3.186624203821656) internal successors, (5003), 1570 states have internal predecessors, (5003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:51,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 5003 transitions. [2021-06-05 06:58:51,137 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 5003 transitions. Word has length 30 [2021-06-05 06:58:51,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:51,137 INFO L482 AbstractCegarLoop]: Abstraction has 1571 states and 5003 transitions. [2021-06-05 06:58:51,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:51,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 5003 transitions. [2021-06-05 06:58:51,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:58:51,139 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:51,139 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:51,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 06:58:51,340 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:51,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:51,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1372095410, now seen corresponding path program 20 times [2021-06-05 06:58:51,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:51,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311959533] [2021-06-05 06:58:51,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:51,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:51,370 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:51,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:51,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311959533] [2021-06-05 06:58:51,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311959533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:51,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139489658] [2021-06-05 06:58:51,370 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 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 06:58:51,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:58:51,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:51,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:58:51,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:51,462 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:58:51,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139489658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:51,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:51,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 06:58:51,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576438337] [2021-06-05 06:58:51,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:58:51,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:51,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:58:51,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:58:51,463 INFO L87 Difference]: Start difference. First operand 1571 states and 5003 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:52,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:52,247 INFO L93 Difference]: Finished difference Result 4002 states and 11899 transitions. [2021-06-05 06:58:52,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 06:58:52,247 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:58:52,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:52,252 INFO L225 Difference]: With dead ends: 4002 [2021-06-05 06:58:52,252 INFO L226 Difference]: Without dead ends: 4002 [2021-06-05 06:58:52,252 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1494 ImplicationChecksByTransitivity, 519.0ms TimeCoverageRelationStatistics Valid=869, Invalid=3291, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 06:58:52,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4002 states. [2021-06-05 06:58:52,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4002 to 1386. [2021-06-05 06:58:52,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1386 states, 1385 states have (on average 3.2368231046931406) internal successors, (4483), 1385 states have internal predecessors, (4483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:52,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 4483 transitions. [2021-06-05 06:58:52,277 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 4483 transitions. Word has length 30 [2021-06-05 06:58:52,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:52,277 INFO L482 AbstractCegarLoop]: Abstraction has 1386 states and 4483 transitions. [2021-06-05 06:58:52,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:52,278 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 4483 transitions. [2021-06-05 06:58:52,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:58:52,279 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:52,279 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:52,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 06:58:52,495 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:52,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:52,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1532772694, now seen corresponding path program 21 times [2021-06-05 06:58:52,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:52,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892979529] [2021-06-05 06:58:52,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:52,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:52,530 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:52,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:52,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892979529] [2021-06-05 06:58:52,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892979529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:52,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017302716] [2021-06-05 06:58:52,531 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 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 06:58:52,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:58:52,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:52,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:58:52,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:52,664 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:52,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017302716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:52,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:52,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 06:58:52,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174726414] [2021-06-05 06:58:52,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:58:52,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:52,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:58:52,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:58:52,665 INFO L87 Difference]: Start difference. First operand 1386 states and 4483 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:53,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:53,735 INFO L93 Difference]: Finished difference Result 5413 states and 16415 transitions. [2021-06-05 06:58:53,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 06:58:53,736 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:58:53,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:53,742 INFO L225 Difference]: With dead ends: 5413 [2021-06-05 06:58:53,742 INFO L226 Difference]: Without dead ends: 5413 [2021-06-05 06:58:53,743 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2469 ImplicationChecksByTransitivity, 761.9ms TimeCoverageRelationStatistics Valid=1250, Invalid=5392, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 06:58:53,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5413 states. [2021-06-05 06:58:53,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5413 to 1890. [2021-06-05 06:58:53,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1890 states, 1889 states have (on average 3.338803599788248) internal successors, (6307), 1889 states have internal predecessors, (6307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:53,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 6307 transitions. [2021-06-05 06:58:53,782 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 6307 transitions. Word has length 30 [2021-06-05 06:58:53,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:53,782 INFO L482 AbstractCegarLoop]: Abstraction has 1890 states and 6307 transitions. [2021-06-05 06:58:53,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:53,782 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 6307 transitions. [2021-06-05 06:58:53,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:58:53,784 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:53,784 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:53,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 06:58:53,985 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:53,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:53,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1706817208, now seen corresponding path program 22 times [2021-06-05 06:58:53,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:53,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637735052] [2021-06-05 06:58:53,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:53,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:54,026 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:54,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:54,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637735052] [2021-06-05 06:58:54,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637735052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:54,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884475941] [2021-06-05 06:58:54,026 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 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 06:58:54,050 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:58:54,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:54,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:58:54,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:54,149 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:54,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884475941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:54,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:54,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 06:58:54,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143106469] [2021-06-05 06:58:54,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:58:54,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:54,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:58:54,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:58:54,150 INFO L87 Difference]: Start difference. First operand 1890 states and 6307 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:55,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:55,049 INFO L93 Difference]: Finished difference Result 5130 states and 15678 transitions. [2021-06-05 06:58:55,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 06:58:55,050 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:58:55,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:55,056 INFO L225 Difference]: With dead ends: 5130 [2021-06-05 06:58:55,056 INFO L226 Difference]: Without dead ends: 5114 [2021-06-05 06:58:55,057 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1694 ImplicationChecksByTransitivity, 616.1ms TimeCoverageRelationStatistics Valid=973, Invalid=3857, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 06:58:55,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5114 states. [2021-06-05 06:58:55,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5114 to 1830. [2021-06-05 06:58:55,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1830 states, 1829 states have (on average 3.348824494259158) internal successors, (6125), 1829 states have internal predecessors, (6125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:55,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1830 states to 1830 states and 6125 transitions. [2021-06-05 06:58:55,093 INFO L78 Accepts]: Start accepts. Automaton has 1830 states and 6125 transitions. Word has length 30 [2021-06-05 06:58:55,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:55,093 INFO L482 AbstractCegarLoop]: Abstraction has 1830 states and 6125 transitions. [2021-06-05 06:58:55,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:55,093 INFO L276 IsEmpty]: Start isEmpty. Operand 1830 states and 6125 transitions. [2021-06-05 06:58:55,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:58:55,095 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:55,095 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:55,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 06:58:55,296 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:55,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:55,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1105015150, now seen corresponding path program 23 times [2021-06-05 06:58:55,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:55,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575549217] [2021-06-05 06:58:55,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:55,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:55,333 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:55,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:55,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575549217] [2021-06-05 06:58:55,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575549217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:55,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578937646] [2021-06-05 06:58:55,333 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 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 06:58:55,359 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:58:55,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:55,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:58:55,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:55,440 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:55,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578937646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:55,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:55,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 06:58:55,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140311466] [2021-06-05 06:58:55,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:58:55,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:55,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:58:55,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:58:55,441 INFO L87 Difference]: Start difference. First operand 1830 states and 6125 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 06:58:56,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:56,202 INFO L93 Difference]: Finished difference Result 4815 states and 14976 transitions. [2021-06-05 06:58:56,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 06:58:56,202 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:58:56,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:56,208 INFO L225 Difference]: With dead ends: 4815 [2021-06-05 06:58:56,208 INFO L226 Difference]: Without dead ends: 4767 [2021-06-05 06:58:56,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1238 ImplicationChecksByTransitivity, 513.3ms TimeCoverageRelationStatistics Valid=750, Invalid=3032, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 06:58:56,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4767 states. [2021-06-05 06:58:56,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4767 to 1882. [2021-06-05 06:58:56,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1882 states, 1881 states have (on average 3.334928229665072) internal successors, (6273), 1881 states have internal predecessors, (6273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:56,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 6273 transitions. [2021-06-05 06:58:56,242 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 6273 transitions. Word has length 30 [2021-06-05 06:58:56,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:56,242 INFO L482 AbstractCegarLoop]: Abstraction has 1882 states and 6273 transitions. [2021-06-05 06:58:56,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 06:58:56,243 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 6273 transitions. [2021-06-05 06:58:56,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:58:56,245 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:56,245 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:56,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:56,448 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:56,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:56,448 INFO L82 PathProgramCache]: Analyzing trace with hash 441056662, now seen corresponding path program 24 times [2021-06-05 06:58:56,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:56,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889570979] [2021-06-05 06:58:56,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:56,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:56,485 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:56,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:56,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889570979] [2021-06-05 06:58:56,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889570979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:56,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389406770] [2021-06-05 06:58:56,485 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 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 06:58:56,526 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:58:56,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:56,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:58:56,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:56,600 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:56,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389406770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:56,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:56,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 06:58:56,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129735715] [2021-06-05 06:58:56,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:58:56,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:56,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:58:56,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:58:56,601 INFO L87 Difference]: Start difference. First operand 1882 states and 6273 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:57,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:57,337 INFO L93 Difference]: Finished difference Result 4941 states and 15164 transitions. [2021-06-05 06:58:57,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 06:58:57,337 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:58:57,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:57,344 INFO L225 Difference]: With dead ends: 4941 [2021-06-05 06:58:57,344 INFO L226 Difference]: Without dead ends: 4861 [2021-06-05 06:58:57,344 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 477.2ms TimeCoverageRelationStatistics Valid=696, Invalid=2726, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 06:58:57,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4861 states. [2021-06-05 06:58:57,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4861 to 2178. [2021-06-05 06:58:57,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2178 states, 2177 states have (on average 3.3674781809830043) internal successors, (7331), 2177 states have internal predecessors, (7331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:57,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2178 states to 2178 states and 7331 transitions. [2021-06-05 06:58:57,388 INFO L78 Accepts]: Start accepts. Automaton has 2178 states and 7331 transitions. Word has length 30 [2021-06-05 06:58:57,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:57,388 INFO L482 AbstractCegarLoop]: Abstraction has 2178 states and 7331 transitions. [2021-06-05 06:58:57,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:57,388 INFO L276 IsEmpty]: Start isEmpty. Operand 2178 states and 7331 transitions. [2021-06-05 06:58:57,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:58:57,391 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:57,391 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:57,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:57,603 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:57,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:57,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1158883238, now seen corresponding path program 25 times [2021-06-05 06:58:57,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:57,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014812917] [2021-06-05 06:58:57,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:57,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:57,632 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:57,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:57,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014812917] [2021-06-05 06:58:57,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014812917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:57,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526950738] [2021-06-05 06:58:57,633 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 06:58:57,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:57,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:58:57,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:57,754 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:57,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526950738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:57,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:57,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 06:58:57,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062107328] [2021-06-05 06:58:57,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:58:57,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:57,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:58:57,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:58:57,755 INFO L87 Difference]: Start difference. First operand 2178 states and 7331 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:58,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:58,538 INFO L93 Difference]: Finished difference Result 6842 states and 21215 transitions. [2021-06-05 06:58:58,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 06:58:58,538 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:58:58,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:58,547 INFO L225 Difference]: With dead ends: 6842 [2021-06-05 06:58:58,547 INFO L226 Difference]: Without dead ends: 6842 [2021-06-05 06:58:58,548 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1351 ImplicationChecksByTransitivity, 509.4ms TimeCoverageRelationStatistics Valid=872, Invalid=3034, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 06:58:58,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6842 states. [2021-06-05 06:58:58,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6842 to 2474. [2021-06-05 06:58:58,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2474 states, 2473 states have (on average 3.4488475535786494) internal successors, (8529), 2473 states have internal predecessors, (8529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:58,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2474 states to 2474 states and 8529 transitions. [2021-06-05 06:58:58,605 INFO L78 Accepts]: Start accepts. Automaton has 2474 states and 8529 transitions. Word has length 30 [2021-06-05 06:58:58,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:58,605 INFO L482 AbstractCegarLoop]: Abstraction has 2474 states and 8529 transitions. [2021-06-05 06:58:58,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:58,605 INFO L276 IsEmpty]: Start isEmpty. Operand 2474 states and 8529 transitions. [2021-06-05 06:58:58,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:58:58,609 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:58,609 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:58,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-05 06:58:58,824 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:58,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:58,824 INFO L82 PathProgramCache]: Analyzing trace with hash 103505844, now seen corresponding path program 26 times [2021-06-05 06:58:58,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:58,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527952132] [2021-06-05 06:58:58,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:58,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:58:58,858 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:58,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:58:58,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527952132] [2021-06-05 06:58:58,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527952132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:58,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071151667] [2021-06-05 06:58:58,858 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 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 06:58:58,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:58:58,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:58:58,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:58:58,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:58:58,985 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:58:58,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071151667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:58:58,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:58:58,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 06:58:58,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889845360] [2021-06-05 06:58:58,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:58:58,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:58:58,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:58:58,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:58:58,986 INFO L87 Difference]: Start difference. First operand 2474 states and 8529 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:59,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:58:59,709 INFO L93 Difference]: Finished difference Result 6641 states and 20706 transitions. [2021-06-05 06:58:59,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 06:58:59,709 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:58:59,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:58:59,718 INFO L225 Difference]: With dead ends: 6641 [2021-06-05 06:58:59,718 INFO L226 Difference]: Without dead ends: 6617 [2021-06-05 06:58:59,718 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 455.6ms TimeCoverageRelationStatistics Valid=767, Invalid=2539, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 06:58:59,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6617 states. [2021-06-05 06:58:59,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6617 to 2462. [2021-06-05 06:58:59,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2462 states, 2461 states have (on average 3.4461600975213327) internal successors, (8481), 2461 states have internal predecessors, (8481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:59,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2462 states to 2462 states and 8481 transitions. [2021-06-05 06:58:59,769 INFO L78 Accepts]: Start accepts. Automaton has 2462 states and 8481 transitions. Word has length 30 [2021-06-05 06:58:59,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:58:59,769 INFO L482 AbstractCegarLoop]: Abstraction has 2462 states and 8481 transitions. [2021-06-05 06:58:59,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:58:59,769 INFO L276 IsEmpty]: Start isEmpty. Operand 2462 states and 8481 transitions. [2021-06-05 06:58:59,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:58:59,783 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:58:59,783 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:58:59,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:58:59,984 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:58:59,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:58:59,984 INFO L82 PathProgramCache]: Analyzing trace with hash 954749098, now seen corresponding path program 27 times [2021-06-05 06:58:59,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:58:59,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102920677] [2021-06-05 06:58:59,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:58:59,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:00,015 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:00,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:00,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102920677] [2021-06-05 06:59:00,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102920677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:00,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965512157] [2021-06-05 06:59:00,016 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 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 06:59:00,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:59:00,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:00,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 06:59:00,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:00,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 06:59:00,120 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:59:00,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:59:00,126 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:59:00,126 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 06:59:00,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:59:00,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-06-05 06:59:00,185 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:59:00,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:59:00,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:59:00,195 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:41 [2021-06-05 06:59:00,294 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:59:00,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965512157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:00,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:00,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14] total 21 [2021-06-05 06:59:00,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987662840] [2021-06-05 06:59:00,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:59:00,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:00,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:59:00,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:59:00,295 INFO L87 Difference]: Start difference. First operand 2462 states and 8481 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 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 06:59:04,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:04,098 INFO L93 Difference]: Finished difference Result 7094 states and 21992 transitions. [2021-06-05 06:59:04,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2021-06-05 06:59:04,099 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 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 30 [2021-06-05 06:59:04,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:04,108 INFO L225 Difference]: With dead ends: 7094 [2021-06-05 06:59:04,108 INFO L226 Difference]: Without dead ends: 7094 [2021-06-05 06:59:04,109 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7400 ImplicationChecksByTransitivity, 3081.2ms TimeCoverageRelationStatistics Valid=2804, Invalid=16656, Unknown=0, NotChecked=0, Total=19460 [2021-06-05 06:59:04,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7094 states. [2021-06-05 06:59:04,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7094 to 2546. [2021-06-05 06:59:04,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2546 states, 2545 states have (on average 3.4675834970530452) internal successors, (8825), 2545 states have internal predecessors, (8825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:04,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2546 states to 2546 states and 8825 transitions. [2021-06-05 06:59:04,163 INFO L78 Accepts]: Start accepts. Automaton has 2546 states and 8825 transitions. Word has length 30 [2021-06-05 06:59:04,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:04,163 INFO L482 AbstractCegarLoop]: Abstraction has 2546 states and 8825 transitions. [2021-06-05 06:59:04,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 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 06:59:04,163 INFO L276 IsEmpty]: Start isEmpty. Operand 2546 states and 8825 transitions. [2021-06-05 06:59:04,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:59:04,167 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:04,167 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:04,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:04,376 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:04,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:04,376 INFO L82 PathProgramCache]: Analyzing trace with hash -52824090, now seen corresponding path program 28 times [2021-06-05 06:59:04,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:04,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804074837] [2021-06-05 06:59:04,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:04,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:04,405 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:04,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:04,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804074837] [2021-06-05 06:59:04,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804074837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:04,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628566668] [2021-06-05 06:59:04,406 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 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 06:59:04,437 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:59:04,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:04,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:04,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:04,531 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:04,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628566668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:04,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:04,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 06:59:04,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39420830] [2021-06-05 06:59:04,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:59:04,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:04,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:59:04,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:59:04,532 INFO L87 Difference]: Start difference. First operand 2546 states and 8825 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 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 06:59:05,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:05,426 INFO L93 Difference]: Finished difference Result 7653 states and 24222 transitions. [2021-06-05 06:59:05,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 06:59:05,426 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 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 06:59:05,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:05,437 INFO L225 Difference]: With dead ends: 7653 [2021-06-05 06:59:05,437 INFO L226 Difference]: Without dead ends: 7653 [2021-06-05 06:59:05,438 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1796 ImplicationChecksByTransitivity, 592.0ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 06:59:05,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7653 states. [2021-06-05 06:59:05,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7653 to 2551. [2021-06-05 06:59:05,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2551 states, 2550 states have (on average 3.4705882352941178) internal successors, (8850), 2550 states have internal predecessors, (8850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:05,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2551 states to 2551 states and 8850 transitions. [2021-06-05 06:59:05,519 INFO L78 Accepts]: Start accepts. Automaton has 2551 states and 8850 transitions. Word has length 30 [2021-06-05 06:59:05,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:05,519 INFO L482 AbstractCegarLoop]: Abstraction has 2551 states and 8850 transitions. [2021-06-05 06:59:05,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 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 06:59:05,519 INFO L276 IsEmpty]: Start isEmpty. Operand 2551 states and 8850 transitions. [2021-06-05 06:59:05,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:59:05,522 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:05,522 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:05,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-05 06:59:05,723 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:05,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:05,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1172821128, now seen corresponding path program 29 times [2021-06-05 06:59:05,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:05,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215323150] [2021-06-05 06:59:05,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:05,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:05,753 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:05,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:05,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215323150] [2021-06-05 06:59:05,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215323150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:05,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153588100] [2021-06-05 06:59:05,754 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 06:59:05,779 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:59:05,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:05,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:05,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:05,866 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:05,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153588100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:05,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:05,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 06:59:05,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615260296] [2021-06-05 06:59:05,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:59:05,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:05,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:59:05,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:59:05,867 INFO L87 Difference]: Start difference. First operand 2551 states and 8850 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:06,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:06,631 INFO L93 Difference]: Finished difference Result 6999 states and 21972 transitions. [2021-06-05 06:59:06,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 06:59:06,631 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:59:06,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:06,650 INFO L225 Difference]: With dead ends: 6999 [2021-06-05 06:59:06,651 INFO L226 Difference]: Without dead ends: 6979 [2021-06-05 06:59:06,651 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1141 ImplicationChecksByTransitivity, 465.5ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 06:59:06,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6979 states. [2021-06-05 06:59:06,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6979 to 2561. [2021-06-05 06:59:06,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2561 states, 2560 states have (on average 3.469140625) internal successors, (8881), 2560 states have internal predecessors, (8881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:06,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2561 states to 2561 states and 8881 transitions. [2021-06-05 06:59:06,717 INFO L78 Accepts]: Start accepts. Automaton has 2561 states and 8881 transitions. Word has length 30 [2021-06-05 06:59:06,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:06,717 INFO L482 AbstractCegarLoop]: Abstraction has 2561 states and 8881 transitions. [2021-06-05 06:59:06,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:06,717 INFO L276 IsEmpty]: Start isEmpty. Operand 2561 states and 8881 transitions. [2021-06-05 06:59:06,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:59:06,720 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:06,720 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:06,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 06:59:06,921 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:06,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:06,921 INFO L82 PathProgramCache]: Analyzing trace with hash -902311436, now seen corresponding path program 30 times [2021-06-05 06:59:06,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:06,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889624116] [2021-06-05 06:59:06,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:06,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:06,951 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:06,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:06,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889624116] [2021-06-05 06:59:06,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889624116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:06,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686743808] [2021-06-05 06:59:06,951 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:06,974 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:59:06,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:06,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:06,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:07,063 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:07,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686743808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:07,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:07,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 06:59:07,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581795476] [2021-06-05 06:59:07,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:59:07,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:07,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:59:07,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:59:07,064 INFO L87 Difference]: Start difference. First operand 2561 states and 8881 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:07,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:07,879 INFO L93 Difference]: Finished difference Result 7314 states and 22731 transitions. [2021-06-05 06:59:07,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 06:59:07,879 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:59:07,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:07,888 INFO L225 Difference]: With dead ends: 7314 [2021-06-05 06:59:07,888 INFO L226 Difference]: Without dead ends: 7314 [2021-06-05 06:59:07,889 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1501 ImplicationChecksByTransitivity, 515.1ms TimeCoverageRelationStatistics Valid=944, Invalid=3216, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 06:59:07,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7314 states. [2021-06-05 06:59:07,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7314 to 2550. [2021-06-05 06:59:07,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2550 states, 2549 states have (on average 3.4699882306786973) internal successors, (8845), 2549 states have internal predecessors, (8845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:07,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2550 states to 2550 states and 8845 transitions. [2021-06-05 06:59:07,943 INFO L78 Accepts]: Start accepts. Automaton has 2550 states and 8845 transitions. Word has length 30 [2021-06-05 06:59:07,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:07,943 INFO L482 AbstractCegarLoop]: Abstraction has 2550 states and 8845 transitions. [2021-06-05 06:59:07,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:07,943 INFO L276 IsEmpty]: Start isEmpty. Operand 2550 states and 8845 transitions. [2021-06-05 06:59:07,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:59:07,947 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:07,947 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:08,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 06:59:08,161 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:08,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:08,161 INFO L82 PathProgramCache]: Analyzing trace with hash -317283250, now seen corresponding path program 31 times [2021-06-05 06:59:08,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:08,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584341743] [2021-06-05 06:59:08,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:08,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:08,193 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:08,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:08,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584341743] [2021-06-05 06:59:08,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584341743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:08,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369873557] [2021-06-05 06:59:08,194 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:08,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:08,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:08,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:08,287 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:08,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369873557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:08,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:08,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 06:59:08,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221234021] [2021-06-05 06:59:08,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:59:08,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:08,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:59:08,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:59:08,288 INFO L87 Difference]: Start difference. First operand 2550 states and 8845 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:08,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:08,842 INFO L93 Difference]: Finished difference Result 5631 states and 17797 transitions. [2021-06-05 06:59:08,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 06:59:08,842 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:59:08,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:08,849 INFO L225 Difference]: With dead ends: 5631 [2021-06-05 06:59:08,849 INFO L226 Difference]: Without dead ends: 5583 [2021-06-05 06:59:08,849 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 316.8ms TimeCoverageRelationStatistics Valid=498, Invalid=1758, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 06:59:08,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5583 states. [2021-06-05 06:59:08,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5583 to 2564. [2021-06-05 06:59:08,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2564 states, 2563 states have (on average 3.467811158798283) internal successors, (8888), 2563 states have internal predecessors, (8888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:08,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2564 states to 2564 states and 8888 transitions. [2021-06-05 06:59:08,893 INFO L78 Accepts]: Start accepts. Automaton has 2564 states and 8888 transitions. Word has length 30 [2021-06-05 06:59:08,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:08,893 INFO L482 AbstractCegarLoop]: Abstraction has 2564 states and 8888 transitions. [2021-06-05 06:59:08,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:08,893 INFO L276 IsEmpty]: Start isEmpty. Operand 2564 states and 8888 transitions. [2021-06-05 06:59:08,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:59:08,897 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:08,897 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:09,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:09,098 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:09,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:09,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1809287982, now seen corresponding path program 32 times [2021-06-05 06:59:09,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:09,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078020754] [2021-06-05 06:59:09,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:09,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:09,126 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:09,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:09,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078020754] [2021-06-05 06:59:09,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078020754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:09,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254668324] [2021-06-05 06:59:09,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 06:59:09,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:59:09,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:09,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:09,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:09,214 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:09,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254668324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:09,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:09,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 06:59:09,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451693215] [2021-06-05 06:59:09,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:59:09,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:09,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:59:09,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:59:09,215 INFO L87 Difference]: Start difference. First operand 2564 states and 8888 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:09,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:09,977 INFO L93 Difference]: Finished difference Result 6400 states and 19785 transitions. [2021-06-05 06:59:09,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 06:59:09,977 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:59:09,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:09,984 INFO L225 Difference]: With dead ends: 6400 [2021-06-05 06:59:09,984 INFO L226 Difference]: Without dead ends: 6384 [2021-06-05 06:59:09,984 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 454.0ms TimeCoverageRelationStatistics Valid=736, Invalid=2804, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 06:59:09,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6384 states. [2021-06-05 06:59:10,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6384 to 2642. [2021-06-05 06:59:10,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2642 states, 2641 states have (on average 3.452101476713366) internal successors, (9117), 2641 states have internal predecessors, (9117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:10,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2642 states to 2642 states and 9117 transitions. [2021-06-05 06:59:10,033 INFO L78 Accepts]: Start accepts. Automaton has 2642 states and 9117 transitions. Word has length 30 [2021-06-05 06:59:10,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:10,033 INFO L482 AbstractCegarLoop]: Abstraction has 2642 states and 9117 transitions. [2021-06-05 06:59:10,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:10,034 INFO L276 IsEmpty]: Start isEmpty. Operand 2642 states and 9117 transitions. [2021-06-05 06:59:10,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:59:10,037 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:10,037 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:10,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 06:59:10,238 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:10,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:10,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1538778290, now seen corresponding path program 33 times [2021-06-05 06:59:10,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:10,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723387804] [2021-06-05 06:59:10,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:10,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:10,266 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:10,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:10,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723387804] [2021-06-05 06:59:10,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723387804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:10,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78025360] [2021-06-05 06:59:10,266 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 06:59:10,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:59:10,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:10,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:10,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:10,358 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:10,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78025360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:10,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:10,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 06:59:10,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749623181] [2021-06-05 06:59:10,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:59:10,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:10,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:59:10,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:59:10,359 INFO L87 Difference]: Start difference. First operand 2642 states and 9117 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:11,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:11,219 INFO L93 Difference]: Finished difference Result 6651 states and 20412 transitions. [2021-06-05 06:59:11,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 06:59:11,219 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:59:11,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:11,227 INFO L225 Difference]: With dead ends: 6651 [2021-06-05 06:59:11,227 INFO L226 Difference]: Without dead ends: 6651 [2021-06-05 06:59:11,228 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1751 ImplicationChecksByTransitivity, 541.6ms TimeCoverageRelationStatistics Valid=978, Invalid=3714, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 06:59:11,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6651 states. [2021-06-05 06:59:11,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6651 to 2550. [2021-06-05 06:59:11,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2550 states, 2549 states have (on average 3.4699882306786973) internal successors, (8845), 2549 states have internal predecessors, (8845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:11,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2550 states to 2550 states and 8845 transitions. [2021-06-05 06:59:11,287 INFO L78 Accepts]: Start accepts. Automaton has 2550 states and 8845 transitions. Word has length 30 [2021-06-05 06:59:11,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:11,287 INFO L482 AbstractCegarLoop]: Abstraction has 2550 states and 8845 transitions. [2021-06-05 06:59:11,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:11,287 INFO L276 IsEmpty]: Start isEmpty. Operand 2550 states and 8845 transitions. [2021-06-05 06:59:11,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:59:11,290 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:11,290 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:11,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:11,491 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:11,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:11,492 INFO L82 PathProgramCache]: Analyzing trace with hash 729705298, now seen corresponding path program 34 times [2021-06-05 06:59:11,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:11,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985718240] [2021-06-05 06:59:11,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:11,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:11,529 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:11,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:11,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985718240] [2021-06-05 06:59:11,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985718240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:11,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624159677] [2021-06-05 06:59:11,529 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 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 06:59:11,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:59:11,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:11,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:11,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:11,617 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:11,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624159677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:11,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:11,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 06:59:11,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431158163] [2021-06-05 06:59:11,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:59:11,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:11,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:59:11,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:59:11,618 INFO L87 Difference]: Start difference. First operand 2550 states and 8845 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:12,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:12,389 INFO L93 Difference]: Finished difference Result 6000 states and 18681 transitions. [2021-06-05 06:59:12,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 06:59:12,389 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:59:12,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:12,396 INFO L225 Difference]: With dead ends: 6000 [2021-06-05 06:59:12,396 INFO L226 Difference]: Without dead ends: 5912 [2021-06-05 06:59:12,396 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1124 ImplicationChecksByTransitivity, 484.6ms TimeCoverageRelationStatistics Valid=722, Invalid=2818, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 06:59:12,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5912 states. [2021-06-05 06:59:12,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5912 to 2568. [2021-06-05 06:59:12,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2568 states, 2567 states have (on average 3.4678613167121153) internal successors, (8902), 2567 states have internal predecessors, (8902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:12,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 8902 transitions. [2021-06-05 06:59:12,442 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 8902 transitions. Word has length 30 [2021-06-05 06:59:12,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:12,443 INFO L482 AbstractCegarLoop]: Abstraction has 2568 states and 8902 transitions. [2021-06-05 06:59:12,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:12,443 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 8902 transitions. [2021-06-05 06:59:12,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:59:12,446 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:12,446 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:12,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:12,646 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:12,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:12,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1432234710, now seen corresponding path program 35 times [2021-06-05 06:59:12,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:12,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727719393] [2021-06-05 06:59:12,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:12,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:12,681 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:12,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:12,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727719393] [2021-06-05 06:59:12,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727719393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:12,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119321564] [2021-06-05 06:59:12,682 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 06:59:12,706 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:59:12,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:12,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:12,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:12,770 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:12,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119321564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:12,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:12,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 06:59:12,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690644886] [2021-06-05 06:59:12,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:59:12,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:12,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:59:12,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:59:12,771 INFO L87 Difference]: Start difference. First operand 2568 states and 8902 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:13,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:13,543 INFO L93 Difference]: Finished difference Result 6028 states and 18895 transitions. [2021-06-05 06:59:13,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 06:59:13,547 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:59:13,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:13,567 INFO L225 Difference]: With dead ends: 6028 [2021-06-05 06:59:13,568 INFO L226 Difference]: Without dead ends: 5980 [2021-06-05 06:59:13,568 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1340 ImplicationChecksByTransitivity, 517.2ms TimeCoverageRelationStatistics Valid=814, Invalid=3218, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 06:59:13,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5980 states. [2021-06-05 06:59:13,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5980 to 2814. [2021-06-05 06:59:13,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2814 states, 2813 states have (on average 3.407394241023818) internal successors, (9585), 2813 states have internal predecessors, (9585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:13,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2814 states to 2814 states and 9585 transitions. [2021-06-05 06:59:13,616 INFO L78 Accepts]: Start accepts. Automaton has 2814 states and 9585 transitions. Word has length 30 [2021-06-05 06:59:13,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:13,616 INFO L482 AbstractCegarLoop]: Abstraction has 2814 states and 9585 transitions. [2021-06-05 06:59:13,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:13,616 INFO L276 IsEmpty]: Start isEmpty. Operand 2814 states and 9585 transitions. [2021-06-05 06:59:13,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:59:13,619 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:13,619 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:13,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-05 06:59:13,819 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:13,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:13,820 INFO L82 PathProgramCache]: Analyzing trace with hash -2092961066, now seen corresponding path program 36 times [2021-06-05 06:59:13,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:13,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360661741] [2021-06-05 06:59:13,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:13,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:13,860 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:13,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:13,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360661741] [2021-06-05 06:59:13,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360661741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:13,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129588104] [2021-06-05 06:59:13,860 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 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 06:59:13,883 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:59:13,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:13,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:13,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:13,945 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:13,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129588104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:13,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:13,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 06:59:13,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882434496] [2021-06-05 06:59:13,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:59:13,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:13,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:59:13,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:59:13,946 INFO L87 Difference]: Start difference. First operand 2814 states and 9585 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:14,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:14,852 INFO L93 Difference]: Finished difference Result 6722 states and 20709 transitions. [2021-06-05 06:59:14,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 06:59:14,853 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:59:14,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:14,861 INFO L225 Difference]: With dead ends: 6722 [2021-06-05 06:59:14,861 INFO L226 Difference]: Without dead ends: 6710 [2021-06-05 06:59:14,861 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1865 ImplicationChecksByTransitivity, 606.0ms TimeCoverageRelationStatistics Valid=1035, Invalid=4221, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 06:59:14,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6710 states. [2021-06-05 06:59:14,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6710 to 3090. [2021-06-05 06:59:14,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3090 states, 3089 states have (on average 3.354807381029459) internal successors, (10363), 3089 states have internal predecessors, (10363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:14,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3090 states to 3090 states and 10363 transitions. [2021-06-05 06:59:14,920 INFO L78 Accepts]: Start accepts. Automaton has 3090 states and 10363 transitions. Word has length 30 [2021-06-05 06:59:14,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:14,920 INFO L482 AbstractCegarLoop]: Abstraction has 3090 states and 10363 transitions. [2021-06-05 06:59:14,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:14,920 INFO L276 IsEmpty]: Start isEmpty. Operand 3090 states and 10363 transitions. [2021-06-05 06:59:14,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:59:14,923 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:14,923 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:15,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:15,124 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:15,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:15,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1822451374, now seen corresponding path program 37 times [2021-06-05 06:59:15,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:15,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050029250] [2021-06-05 06:59:15,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:15,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:15,161 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:15,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:15,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050029250] [2021-06-05 06:59:15,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050029250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:15,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114270869] [2021-06-05 06:59:15,161 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 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 06:59:15,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:15,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:15,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:15,251 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:15,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114270869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:15,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:15,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 06:59:15,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205326447] [2021-06-05 06:59:15,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:59:15,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:15,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:59:15,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:59:15,252 INFO L87 Difference]: Start difference. First operand 3090 states and 10363 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:16,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:16,370 INFO L93 Difference]: Finished difference Result 7117 states and 21720 transitions. [2021-06-05 06:59:16,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-05 06:59:16,370 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:59:16,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:16,379 INFO L225 Difference]: With dead ends: 7117 [2021-06-05 06:59:16,379 INFO L226 Difference]: Without dead ends: 7117 [2021-06-05 06:59:16,379 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2848 ImplicationChecksByTransitivity, 764.0ms TimeCoverageRelationStatistics Valid=1421, Invalid=5889, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 06:59:16,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7117 states. [2021-06-05 06:59:16,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7117 to 2928. [2021-06-05 06:59:16,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2928 states, 2927 states have (on average 3.3850358729074137) internal successors, (9908), 2927 states have internal predecessors, (9908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:16,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2928 states to 2928 states and 9908 transitions. [2021-06-05 06:59:16,438 INFO L78 Accepts]: Start accepts. Automaton has 2928 states and 9908 transitions. Word has length 30 [2021-06-05 06:59:16,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:16,438 INFO L482 AbstractCegarLoop]: Abstraction has 2928 states and 9908 transitions. [2021-06-05 06:59:16,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:16,438 INFO L276 IsEmpty]: Start isEmpty. Operand 2928 states and 9908 transitions. [2021-06-05 06:59:16,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 06:59:16,441 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:16,441 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:16,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-05 06:59:16,642 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:16,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:16,642 INFO L82 PathProgramCache]: Analyzing trace with hash -605801532, now seen corresponding path program 38 times [2021-06-05 06:59:16,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:16,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562565571] [2021-06-05 06:59:16,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:16,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:16,690 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:16,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:16,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562565571] [2021-06-05 06:59:16,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562565571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:16,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652189305] [2021-06-05 06:59:16,690 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 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 06:59:16,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:59:16,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:16,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 06:59:16,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:16,832 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:16,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652189305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:16,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:16,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 06:59:16,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105488420] [2021-06-05 06:59:16,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:59:16,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:16,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:59:16,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:59:16,833 INFO L87 Difference]: Start difference. First operand 2928 states and 9908 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 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 06:59:17,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:17,751 INFO L93 Difference]: Finished difference Result 11499 states and 37094 transitions. [2021-06-05 06:59:17,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 06:59:17,752 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 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 06:59:17,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:17,767 INFO L225 Difference]: With dead ends: 11499 [2021-06-05 06:59:17,767 INFO L226 Difference]: Without dead ends: 11499 [2021-06-05 06:59:17,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 536.0ms TimeCoverageRelationStatistics Valid=922, Invalid=2984, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 06:59:17,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11499 states. [2021-06-05 06:59:17,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11499 to 3853. [2021-06-05 06:59:17,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3853 states, 3852 states have (on average 3.5983904465212877) internal successors, (13861), 3852 states have internal predecessors, (13861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:17,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3853 states to 3853 states and 13861 transitions. [2021-06-05 06:59:17,870 INFO L78 Accepts]: Start accepts. Automaton has 3853 states and 13861 transitions. Word has length 32 [2021-06-05 06:59:17,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:17,870 INFO L482 AbstractCegarLoop]: Abstraction has 3853 states and 13861 transitions. [2021-06-05 06:59:17,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 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 06:59:17,871 INFO L276 IsEmpty]: Start isEmpty. Operand 3853 states and 13861 transitions. [2021-06-05 06:59:17,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 06:59:17,875 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:17,875 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:18,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-05 06:59:18,075 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:18,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:18,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1297197704, now seen corresponding path program 17 times [2021-06-05 06:59:18,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:18,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125502952] [2021-06-05 06:59:18,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:18,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:18,119 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:18,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:18,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125502952] [2021-06-05 06:59:18,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125502952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:18,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184935461] [2021-06-05 06:59:18,120 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 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 06:59:18,147 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 06:59:18,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:18,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 06:59:18,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:18,261 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:18,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184935461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:18,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:18,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 06:59:18,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39069968] [2021-06-05 06:59:18,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:59:18,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:18,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:59:18,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:59:18,262 INFO L87 Difference]: Start difference. First operand 3853 states and 13861 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 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 06:59:19,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:19,273 INFO L93 Difference]: Finished difference Result 11274 states and 36638 transitions. [2021-06-05 06:59:19,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 06:59:19,274 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 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 06:59:19,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:19,291 INFO L225 Difference]: With dead ends: 11274 [2021-06-05 06:59:19,291 INFO L226 Difference]: Without dead ends: 11274 [2021-06-05 06:59:19,291 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 586.5ms TimeCoverageRelationStatistics Valid=918, Invalid=3114, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 06:59:19,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11274 states. [2021-06-05 06:59:19,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11274 to 3659. [2021-06-05 06:59:19,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3659 states, 3658 states have (on average 3.548933843630399) internal successors, (12982), 3658 states have internal predecessors, (12982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:19,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3659 states to 3659 states and 12982 transitions. [2021-06-05 06:59:19,384 INFO L78 Accepts]: Start accepts. Automaton has 3659 states and 12982 transitions. Word has length 32 [2021-06-05 06:59:19,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:19,384 INFO L482 AbstractCegarLoop]: Abstraction has 3659 states and 12982 transitions. [2021-06-05 06:59:19,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 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 06:59:19,384 INFO L276 IsEmpty]: Start isEmpty. Operand 3659 states and 12982 transitions. [2021-06-05 06:59:19,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 06:59:19,389 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:19,389 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:19,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:19,589 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:19,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:19,589 INFO L82 PathProgramCache]: Analyzing trace with hash 600098510, now seen corresponding path program 39 times [2021-06-05 06:59:19,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:19,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024703485] [2021-06-05 06:59:19,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:19,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:19,620 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:19,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:19,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024703485] [2021-06-05 06:59:19,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024703485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:19,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658353892] [2021-06-05 06:59:19,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 06:59:19,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:59:19,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:19,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 06:59:19,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:19,746 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:19,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658353892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:19,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:19,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 06:59:19,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965858042] [2021-06-05 06:59:19,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:59:19,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:19,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:59:19,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:59:19,747 INFO L87 Difference]: Start difference. First operand 3659 states and 12982 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 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 06:59:20,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:20,253 INFO L93 Difference]: Finished difference Result 9494 states and 30497 transitions. [2021-06-05 06:59:20,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 06:59:20,254 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 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 32 [2021-06-05 06:59:20,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:20,267 INFO L225 Difference]: With dead ends: 9494 [2021-06-05 06:59:20,267 INFO L226 Difference]: Without dead ends: 9486 [2021-06-05 06:59:20,267 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 274.5ms TimeCoverageRelationStatistics Valid=396, Invalid=1244, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 06:59:20,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9486 states. [2021-06-05 06:59:20,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9486 to 3671. [2021-06-05 06:59:20,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3671 states, 3670 states have (on average 3.5498637602179834) internal successors, (13028), 3670 states have internal predecessors, (13028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:20,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3671 states to 3671 states and 13028 transitions. [2021-06-05 06:59:20,351 INFO L78 Accepts]: Start accepts. Automaton has 3671 states and 13028 transitions. Word has length 32 [2021-06-05 06:59:20,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:20,351 INFO L482 AbstractCegarLoop]: Abstraction has 3671 states and 13028 transitions. [2021-06-05 06:59:20,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 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 06:59:20,351 INFO L276 IsEmpty]: Start isEmpty. Operand 3671 states and 13028 transitions. [2021-06-05 06:59:20,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 06:59:20,355 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:20,356 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:20,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 06:59:20,556 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:20,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:20,556 INFO L82 PathProgramCache]: Analyzing trace with hash 870608202, now seen corresponding path program 40 times [2021-06-05 06:59:20,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:20,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155295483] [2021-06-05 06:59:20,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:20,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:20,588 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:20,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:20,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155295483] [2021-06-05 06:59:20,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155295483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:20,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448699746] [2021-06-05 06:59:20,589 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 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 06:59:20,619 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:59:20,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:20,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 06:59:20,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:20,711 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:20,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448699746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:20,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:20,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 06:59:20,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833010820] [2021-06-05 06:59:20,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:59:20,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:20,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:59:20,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:59:20,712 INFO L87 Difference]: Start difference. First operand 3671 states and 13028 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 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 06:59:21,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:21,370 INFO L93 Difference]: Finished difference Result 10005 states and 31855 transitions. [2021-06-05 06:59:21,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 06:59:21,370 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 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 32 [2021-06-05 06:59:21,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:21,384 INFO L225 Difference]: With dead ends: 10005 [2021-06-05 06:59:21,384 INFO L226 Difference]: Without dead ends: 10005 [2021-06-05 06:59:21,385 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 347.0ms TimeCoverageRelationStatistics Valid=480, Invalid=1412, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 06:59:21,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10005 states. [2021-06-05 06:59:21,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10005 to 3659. [2021-06-05 06:59:21,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3659 states, 3658 states have (on average 3.548933843630399) internal successors, (12982), 3658 states have internal predecessors, (12982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:21,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3659 states to 3659 states and 12982 transitions. [2021-06-05 06:59:21,472 INFO L78 Accepts]: Start accepts. Automaton has 3659 states and 12982 transitions. Word has length 32 [2021-06-05 06:59:21,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:21,472 INFO L482 AbstractCegarLoop]: Abstraction has 3659 states and 12982 transitions. [2021-06-05 06:59:21,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 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 06:59:21,472 INFO L276 IsEmpty]: Start isEmpty. Operand 3659 states and 12982 transitions. [2021-06-05 06:59:21,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 06:59:21,477 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:21,477 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:21,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:21,677 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:21,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:21,677 INFO L82 PathProgramCache]: Analyzing trace with hash 2007937660, now seen corresponding path program 18 times [2021-06-05 06:59:21,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:21,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072645830] [2021-06-05 06:59:21,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:21,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:21,714 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:21,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:21,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072645830] [2021-06-05 06:59:21,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072645830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:21,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412540038] [2021-06-05 06:59:21,715 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 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 06:59:21,739 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 06:59:21,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:21,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:21,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:21,846 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:59:21,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412540038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:21,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:21,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-06-05 06:59:21,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345550741] [2021-06-05 06:59:21,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:59:21,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:21,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:59:21,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:59:21,847 INFO L87 Difference]: Start difference. First operand 3659 states and 12982 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 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 06:59:23,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:23,392 INFO L93 Difference]: Finished difference Result 10824 states and 34873 transitions. [2021-06-05 06:59:23,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-06-05 06:59:23,392 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 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 06:59:23,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:23,408 INFO L225 Difference]: With dead ends: 10824 [2021-06-05 06:59:23,408 INFO L226 Difference]: Without dead ends: 10824 [2021-06-05 06:59:23,409 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3112 ImplicationChecksByTransitivity, 985.4ms TimeCoverageRelationStatistics Valid=1649, Invalid=7281, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 06:59:23,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10824 states. [2021-06-05 06:59:23,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10824 to 4026. [2021-06-05 06:59:23,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4026 states, 4025 states have (on average 3.570683229813665) internal successors, (14372), 4025 states have internal predecessors, (14372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:23,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4026 states to 4026 states and 14372 transitions. [2021-06-05 06:59:23,506 INFO L78 Accepts]: Start accepts. Automaton has 4026 states and 14372 transitions. Word has length 32 [2021-06-05 06:59:23,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:23,506 INFO L482 AbstractCegarLoop]: Abstraction has 4026 states and 14372 transitions. [2021-06-05 06:59:23,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 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 06:59:23,506 INFO L276 IsEmpty]: Start isEmpty. Operand 4026 states and 14372 transitions. [2021-06-05 06:59:23,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 06:59:23,511 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:23,511 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:23,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 06:59:23,711 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:23,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:23,712 INFO L82 PathProgramCache]: Analyzing trace with hash -383319252, now seen corresponding path program 41 times [2021-06-05 06:59:23,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:23,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969279523] [2021-06-05 06:59:23,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:23,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:23,752 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:23,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:23,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969279523] [2021-06-05 06:59:23,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969279523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:23,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963205301] [2021-06-05 06:59:23,752 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 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 06:59:23,777 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 06:59:23,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:23,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:23,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:23,913 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:59:23,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963205301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:23,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:23,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 06:59:23,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897235700] [2021-06-05 06:59:23,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:59:23,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:23,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:59:23,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:59:23,914 INFO L87 Difference]: Start difference. First operand 4026 states and 14372 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 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 06:59:25,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:25,695 INFO L93 Difference]: Finished difference Result 11450 states and 37158 transitions. [2021-06-05 06:59:25,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-06-05 06:59:25,695 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 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 32 [2021-06-05 06:59:25,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:25,711 INFO L225 Difference]: With dead ends: 11450 [2021-06-05 06:59:25,712 INFO L226 Difference]: Without dead ends: 11402 [2021-06-05 06:59:25,712 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4651 ImplicationChecksByTransitivity, 1200.9ms TimeCoverageRelationStatistics Valid=2133, Invalid=10299, Unknown=0, NotChecked=0, Total=12432 [2021-06-05 06:59:25,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11402 states. [2021-06-05 06:59:25,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11402 to 4295. [2021-06-05 06:59:25,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4295 states, 4294 states have (on average 3.6313460642757334) internal successors, (15593), 4294 states have internal predecessors, (15593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:25,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4295 states to 4295 states and 15593 transitions. [2021-06-05 06:59:25,824 INFO L78 Accepts]: Start accepts. Automaton has 4295 states and 15593 transitions. Word has length 32 [2021-06-05 06:59:25,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:25,825 INFO L482 AbstractCegarLoop]: Abstraction has 4295 states and 15593 transitions. [2021-06-05 06:59:25,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 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 06:59:25,825 INFO L276 IsEmpty]: Start isEmpty. Operand 4295 states and 15593 transitions. [2021-06-05 06:59:25,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 06:59:25,830 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:25,830 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:26,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:26,031 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:26,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:26,031 INFO L82 PathProgramCache]: Analyzing trace with hash 717122884, now seen corresponding path program 19 times [2021-06-05 06:59:26,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:26,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235551130] [2021-06-05 06:59:26,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:26,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:26,076 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:59:26,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:26,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235551130] [2021-06-05 06:59:26,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235551130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:26,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802598977] [2021-06-05 06:59:26,076 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 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 06:59:26,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:26,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 06:59:26,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:26,213 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:26,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802598977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:26,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:26,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 06:59:26,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84640667] [2021-06-05 06:59:26,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:59:26,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:26,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:59:26,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:59:26,214 INFO L87 Difference]: Start difference. First operand 4295 states and 15593 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 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 06:59:26,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:26,981 INFO L93 Difference]: Finished difference Result 11886 states and 38735 transitions. [2021-06-05 06:59:26,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 06:59:26,981 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 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 32 [2021-06-05 06:59:26,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:27,000 INFO L225 Difference]: With dead ends: 11886 [2021-06-05 06:59:27,001 INFO L226 Difference]: Without dead ends: 11886 [2021-06-05 06:59:27,001 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 490.5ms TimeCoverageRelationStatistics Valid=740, Invalid=2016, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 06:59:27,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11886 states. [2021-06-05 06:59:27,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11886 to 4493. [2021-06-05 06:59:27,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4493 states, 4492 states have (on average 3.610418521816563) internal successors, (16218), 4492 states have internal predecessors, (16218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:27,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4493 states to 4493 states and 16218 transitions. [2021-06-05 06:59:27,135 INFO L78 Accepts]: Start accepts. Automaton has 4493 states and 16218 transitions. Word has length 32 [2021-06-05 06:59:27,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:27,135 INFO L482 AbstractCegarLoop]: Abstraction has 4493 states and 16218 transitions. [2021-06-05 06:59:27,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 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 06:59:27,135 INFO L276 IsEmpty]: Start isEmpty. Operand 4493 states and 16218 transitions. [2021-06-05 06:59:27,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 06:59:27,141 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:27,141 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:27,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-06-05 06:59:27,342 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:27,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:27,342 INFO L82 PathProgramCache]: Analyzing trace with hash -338254510, now seen corresponding path program 20 times [2021-06-05 06:59:27,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:27,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630297750] [2021-06-05 06:59:27,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:27,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:27,380 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:59:27,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:27,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630297750] [2021-06-05 06:59:27,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630297750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:27,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423521156] [2021-06-05 06:59:27,380 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 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 06:59:27,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:59:27,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:27,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:59:27,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:27,510 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:59:27,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423521156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:27,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:27,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 06:59:27,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9962133] [2021-06-05 06:59:27,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:59:27,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:27,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:59:27,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:59:27,511 INFO L87 Difference]: Start difference. First operand 4493 states and 16218 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 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 06:59:28,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:28,929 INFO L93 Difference]: Finished difference Result 12030 states and 39107 transitions. [2021-06-05 06:59:28,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-06-05 06:59:28,929 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 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 32 [2021-06-05 06:59:28,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:28,946 INFO L225 Difference]: With dead ends: 12030 [2021-06-05 06:59:28,947 INFO L226 Difference]: Without dead ends: 12026 [2021-06-05 06:59:28,947 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3145 ImplicationChecksByTransitivity, 888.6ms TimeCoverageRelationStatistics Valid=1618, Invalid=7124, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 06:59:28,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12026 states. [2021-06-05 06:59:29,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12026 to 4522. [2021-06-05 06:59:29,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4522 states, 4521 states have (on average 3.6051758460517584) internal successors, (16299), 4521 states have internal predecessors, (16299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:29,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4522 states to 4522 states and 16299 transitions. [2021-06-05 06:59:29,063 INFO L78 Accepts]: Start accepts. Automaton has 4522 states and 16299 transitions. Word has length 32 [2021-06-05 06:59:29,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:29,063 INFO L482 AbstractCegarLoop]: Abstraction has 4522 states and 16299 transitions. [2021-06-05 06:59:29,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 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 06:59:29,063 INFO L276 IsEmpty]: Start isEmpty. Operand 4522 states and 16299 transitions. [2021-06-05 06:59:29,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 06:59:29,069 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:29,069 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:59:29,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:29,280 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:29,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:29,280 INFO L82 PathProgramCache]: Analyzing trace with hash 956690446, now seen corresponding path program 21 times [2021-06-05 06:59:29,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:29,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349693965] [2021-06-05 06:59:29,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:29,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:29,317 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:29,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:29,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349693965] [2021-06-05 06:59:29,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349693965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:29,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632032861] [2021-06-05 06:59:29,318 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 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 06:59:29,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 06:59:29,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:29,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 06:59:29,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:29,447 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:29,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632032861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:29,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:29,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 06:59:29,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281800776] [2021-06-05 06:59:29,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:59:29,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:29,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:59:29,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:59:29,448 INFO L87 Difference]: Start difference. First operand 4522 states and 16299 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 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 06:59:30,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:30,526 INFO L93 Difference]: Finished difference Result 11020 states and 36349 transitions. [2021-06-05 06:59:30,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 06:59:30,527 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 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 32 [2021-06-05 06:59:30,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:30,543 INFO L225 Difference]: With dead ends: 11020 [2021-06-05 06:59:30,543 INFO L226 Difference]: Without dead ends: 10988 [2021-06-05 06:59:30,543 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1744 ImplicationChecksByTransitivity, 650.6ms TimeCoverageRelationStatistics Valid=1165, Invalid=4237, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 06:59:30,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10988 states. [2021-06-05 06:59:30,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10988 to 4521. [2021-06-05 06:59:30,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4521 states, 4520 states have (on average 3.604424778761062) internal successors, (16292), 4520 states have internal predecessors, (16292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:30,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4521 states to 4521 states and 16292 transitions. [2021-06-05 06:59:30,650 INFO L78 Accepts]: Start accepts. Automaton has 4521 states and 16292 transitions. Word has length 32 [2021-06-05 06:59:30,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:30,650 INFO L482 AbstractCegarLoop]: Abstraction has 4521 states and 16292 transitions. [2021-06-05 06:59:30,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 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 06:59:30,651 INFO L276 IsEmpty]: Start isEmpty. Operand 4521 states and 16292 transitions. [2021-06-05 06:59:30,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 06:59:30,656 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:30,656 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] [2021-06-05 06:59:30,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-05 06:59:30,856 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:30,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:30,857 INFO L82 PathProgramCache]: Analyzing trace with hash 313112068, now seen corresponding path program 42 times [2021-06-05 06:59:30,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:30,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104713913] [2021-06-05 06:59:30,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:30,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:31,282 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:31,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:31,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104713913] [2021-06-05 06:59:31,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104713913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:31,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33156583] [2021-06-05 06:59:31,282 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 06:59:31,308 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:59:31,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:31,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:59:31,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:31,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-05 06:59:31,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:59:31,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:59:31,419 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:59:31,419 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:30 [2021-06-05 06:59:31,463 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-06-05 06:59:31,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 06:59:31,464 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:59:31,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:59:31,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:59:31,476 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:42 [2021-06-05 06:59:31,537 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-06-05 06:59:31,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2021-06-05 06:59:31,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:59:31,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:59:31,557 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:59:31,558 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:55, output treesize:54 [2021-06-05 06:59:31,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:59:31,692 INFO L354 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2021-06-05 06:59:31,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-06-05 06:59:31,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:59:31,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:59:31,712 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:59:31,712 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:58, output treesize:57 [2021-06-05 06:59:31,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:59:31,872 INFO L354 Elim1Store]: treesize reduction 64, result has 20.0 percent of original size [2021-06-05 06:59:31,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 38 [2021-06-05 06:59:31,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:59:31,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:59:31,893 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 06:59:31,893 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:64, output treesize:63 [2021-06-05 06:59:32,032 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:59:32,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33156583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:32,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:32,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-06-05 06:59:32,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651959987] [2021-06-05 06:59:32,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:59:32,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:32,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:59:32,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:59:32,033 INFO L87 Difference]: Start difference. First operand 4521 states and 16292 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 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 06:59:32,564 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 63 [2021-06-05 06:59:34,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:34,680 INFO L93 Difference]: Finished difference Result 6435 states and 22058 transitions. [2021-06-05 06:59:34,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 06:59:34,681 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 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 32 [2021-06-05 06:59:34,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:34,689 INFO L225 Difference]: With dead ends: 6435 [2021-06-05 06:59:34,689 INFO L226 Difference]: Without dead ends: 6256 [2021-06-05 06:59:34,689 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1196 ImplicationChecksByTransitivity, 2350.1ms TimeCoverageRelationStatistics Valid=509, Invalid=3397, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 06:59:34,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6256 states. [2021-06-05 06:59:34,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6256 to 4629. [2021-06-05 06:59:34,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4629 states, 4628 states have (on average 3.6028522039757993) internal successors, (16674), 4628 states have internal predecessors, (16674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:34,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4629 states to 4629 states and 16674 transitions. [2021-06-05 06:59:34,750 INFO L78 Accepts]: Start accepts. Automaton has 4629 states and 16674 transitions. Word has length 32 [2021-06-05 06:59:34,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:34,750 INFO L482 AbstractCegarLoop]: Abstraction has 4629 states and 16674 transitions. [2021-06-05 06:59:34,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 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 06:59:34,750 INFO L276 IsEmpty]: Start isEmpty. Operand 4629 states and 16674 transitions. [2021-06-05 06:59:34,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 06:59:34,756 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:34,756 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] [2021-06-05 06:59:34,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:59:34,972 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:34,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:34,972 INFO L82 PathProgramCache]: Analyzing trace with hash 2029292164, now seen corresponding path program 43 times [2021-06-05 06:59:34,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:34,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874429993] [2021-06-05 06:59:34,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:34,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:35,350 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:35,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:35,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874429993] [2021-06-05 06:59:35,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874429993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:35,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655152291] [2021-06-05 06:59:35,350 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 06:59:35,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:35,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 06:59:35,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:35,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-05 06:59:35,470 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:59:35,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:59:35,478 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:59:35,479 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:28 [2021-06-05 06:59:35,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 06:59:35,505 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:59:35,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:59:35,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:59:35,515 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:35 [2021-06-05 06:59:35,557 INFO L354 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2021-06-05 06:59:35,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-06-05 06:59:35,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:59:35,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:59:35,571 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:59:35,571 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:47 [2021-06-05 06:59:35,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:59:35,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:59:35,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:59:35,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2021-06-05 06:59:35,689 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:59:35,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:59:35,703 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:59:35,703 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:42 [2021-06-05 06:59:35,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:59:35,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:59:35,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2021-06-05 06:59:35,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:59:35,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:59:35,777 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:59:35,777 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:39 [2021-06-05 06:59:35,872 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:35,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655152291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:35,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:35,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2021-06-05 06:59:35,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75297335] [2021-06-05 06:59:35,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:59:35,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:35,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:59:35,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:59:35,874 INFO L87 Difference]: Start difference. First operand 4629 states and 16674 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 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 06:59:37,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:37,232 INFO L93 Difference]: Finished difference Result 6469 states and 22175 transitions. [2021-06-05 06:59:37,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 06:59:37,232 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 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 32 [2021-06-05 06:59:37,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:37,241 INFO L225 Difference]: With dead ends: 6469 [2021-06-05 06:59:37,241 INFO L226 Difference]: Without dead ends: 6146 [2021-06-05 06:59:37,241 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 1509.5ms TimeCoverageRelationStatistics Valid=413, Invalid=1939, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 06:59:37,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6146 states. [2021-06-05 06:59:37,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6146 to 4719. [2021-06-05 06:59:37,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4719 states, 4718 states have (on average 3.5938957185247986) internal successors, (16956), 4718 states have internal predecessors, (16956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:37,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4719 states to 4719 states and 16956 transitions. [2021-06-05 06:59:37,333 INFO L78 Accepts]: Start accepts. Automaton has 4719 states and 16956 transitions. Word has length 32 [2021-06-05 06:59:37,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:37,333 INFO L482 AbstractCegarLoop]: Abstraction has 4719 states and 16956 transitions. [2021-06-05 06:59:37,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 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 06:59:37,333 INFO L276 IsEmpty]: Start isEmpty. Operand 4719 states and 16956 transitions. [2021-06-05 06:59:37,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 06:59:37,339 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:37,339 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] [2021-06-05 06:59:37,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-05 06:59:37,540 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:37,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:37,540 INFO L82 PathProgramCache]: Analyzing trace with hash -500654400, now seen corresponding path program 44 times [2021-06-05 06:59:37,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:37,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095243089] [2021-06-05 06:59:37,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:37,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:37,937 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:37,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:37,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095243089] [2021-06-05 06:59:37,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095243089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:37,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330676094] [2021-06-05 06:59:37,937 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 06:59:37,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:59:37,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:37,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:59:37,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:38,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 06:59:38,065 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:59:38,073 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:59:38,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:59:38,074 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-06-05 06:59:38,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:59:38,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-06-05 06:59:38,103 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:59:38,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:59:38,115 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:59:38,115 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:41 [2021-06-05 06:59:38,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:59:38,165 INFO L354 Elim1Store]: treesize reduction 38, result has 25.5 percent of original size [2021-06-05 06:59:38,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 32 [2021-06-05 06:59:38,166 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:59:38,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:59:38,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:59:38,179 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:53 [2021-06-05 06:59:38,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:59:38,258 INFO L354 Elim1Store]: treesize reduction 35, result has 12.5 percent of original size [2021-06-05 06:59:38,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 37 [2021-06-05 06:59:38,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:59:38,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:59:38,276 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:59:38,276 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:61, output treesize:53 [2021-06-05 06:59:38,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:59:38,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:59:38,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:59:38,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:59:38,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:59:38,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 37 [2021-06-05 06:59:38,418 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:59:38,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:59:38,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:59:38,433 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:56, output treesize:48 [2021-06-05 06:59:38,507 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:38,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330676094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:38,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:38,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-06-05 06:59:38,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088878341] [2021-06-05 06:59:38,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:59:38,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:38,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:59:38,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:59:38,508 INFO L87 Difference]: Start difference. First operand 4719 states and 16956 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 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 06:59:38,846 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-06-05 06:59:41,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:41,042 INFO L93 Difference]: Finished difference Result 7571 states and 25578 transitions. [2021-06-05 06:59:41,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 06:59:41,042 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 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 32 [2021-06-05 06:59:41,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:41,052 INFO L225 Difference]: With dead ends: 7571 [2021-06-05 06:59:41,052 INFO L226 Difference]: Without dead ends: 7144 [2021-06-05 06:59:41,053 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1068 ImplicationChecksByTransitivity, 2379.3ms TimeCoverageRelationStatistics Valid=604, Invalid=2936, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 06:59:41,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7144 states. [2021-06-05 06:59:41,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7144 to 4997. [2021-06-05 06:59:41,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4997 states, 4996 states have (on average 3.5712570056044837) internal successors, (17842), 4996 states have internal predecessors, (17842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:41,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4997 states to 4997 states and 17842 transitions. [2021-06-05 06:59:41,123 INFO L78 Accepts]: Start accepts. Automaton has 4997 states and 17842 transitions. Word has length 32 [2021-06-05 06:59:41,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:41,123 INFO L482 AbstractCegarLoop]: Abstraction has 4997 states and 17842 transitions. [2021-06-05 06:59:41,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 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 06:59:41,123 INFO L276 IsEmpty]: Start isEmpty. Operand 4997 states and 17842 transitions. [2021-06-05 06:59:41,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 06:59:41,128 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:41,128 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] [2021-06-05 06:59:41,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 06:59:41,329 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:41,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:41,329 INFO L82 PathProgramCache]: Analyzing trace with hash 457173692, now seen corresponding path program 45 times [2021-06-05 06:59:41,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:41,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589144911] [2021-06-05 06:59:41,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:41,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:41,831 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:41,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:41,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589144911] [2021-06-05 06:59:41,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589144911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:41,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716513846] [2021-06-05 06:59:41,831 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 06:59:41,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 06:59:41,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:41,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 06:59:41,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:41,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-05 06:59:41,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:59:41,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:59:41,998 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:59:41,998 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:33 [2021-06-05 06:59:42,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:59:42,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 06:59:42,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:59:42,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:59:42,055 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:59:42,055 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:40 [2021-06-05 06:59:42,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:59:42,119 INFO L354 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2021-06-05 06:59:42,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-06-05 06:59:42,120 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:59:42,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:59:42,136 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:59:42,136 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:53, output treesize:52 [2021-06-05 06:59:42,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:59:42,261 INFO L354 Elim1Store]: treesize reduction 64, result has 20.0 percent of original size [2021-06-05 06:59:42,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 38 [2021-06-05 06:59:42,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:59:42,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:59:42,287 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 06:59:42,287 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:68, output treesize:67 [2021-06-05 06:59:42,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:59:42,480 INFO L354 Elim1Store]: treesize reduction 104, result has 16.8 percent of original size [2021-06-05 06:59:42,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 37 treesize of output 48 [2021-06-05 06:59:42,482 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:59:42,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:59:42,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2021-06-05 06:59:42,506 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:76, output treesize:75 [2021-06-05 06:59:42,910 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:42,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716513846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:42,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:42,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-06-05 06:59:42,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085808815] [2021-06-05 06:59:42,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:59:42,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:42,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:59:42,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:59:42,911 INFO L87 Difference]: Start difference. First operand 4997 states and 17842 transitions. Second operand has 31 states, 31 states have (on average 2.0) internal successors, (62), 31 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 06:59:43,665 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2021-06-05 06:59:43,809 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 73 [2021-06-05 06:59:45,280 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 55 [2021-06-05 06:59:45,971 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2021-06-05 06:59:46,694 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 81 [2021-06-05 06:59:46,938 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 73 [2021-06-05 06:59:47,241 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 86 [2021-06-05 06:59:48,222 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 85 [2021-06-05 06:59:48,635 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 86 [2021-06-05 06:59:48,805 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 83 [2021-06-05 06:59:52,626 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 88 [2021-06-05 06:59:54,138 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 87 [2021-06-05 06:59:55,453 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 85 [2021-06-05 06:59:57,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:59:57,622 INFO L93 Difference]: Finished difference Result 7587 states and 26264 transitions. [2021-06-05 06:59:57,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 06:59:57,623 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 31 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 32 [2021-06-05 06:59:57,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:59:57,633 INFO L225 Difference]: With dead ends: 7587 [2021-06-05 06:59:57,633 INFO L226 Difference]: Without dead ends: 7468 [2021-06-05 06:59:57,634 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1854 ImplicationChecksByTransitivity, 5593.8ms TimeCoverageRelationStatistics Valid=935, Invalid=5227, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 06:59:57,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7468 states. [2021-06-05 06:59:57,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7468 to 5655. [2021-06-05 06:59:57,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5655 states, 5654 states have (on average 3.5951538733639903) internal successors, (20327), 5654 states have internal predecessors, (20327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:59:57,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5655 states to 5655 states and 20327 transitions. [2021-06-05 06:59:57,712 INFO L78 Accepts]: Start accepts. Automaton has 5655 states and 20327 transitions. Word has length 32 [2021-06-05 06:59:57,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:59:57,712 INFO L482 AbstractCegarLoop]: Abstraction has 5655 states and 20327 transitions. [2021-06-05 06:59:57,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 31 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 06:59:57,713 INFO L276 IsEmpty]: Start isEmpty. Operand 5655 states and 20327 transitions. [2021-06-05 06:59:57,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 06:59:57,719 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:59:57,719 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] [2021-06-05 06:59:57,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 06:59:57,920 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:59:57,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:59:57,920 INFO L82 PathProgramCache]: Analyzing trace with hash 737661248, now seen corresponding path program 46 times [2021-06-05 06:59:57,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:59:57,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596658350] [2021-06-05 06:59:57,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:59:57,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:59:58,279 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:58,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:59:58,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596658350] [2021-06-05 06:59:58,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596658350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:58,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675759636] [2021-06-05 06:59:58,280 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 06:59:58,302 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:59:58,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:59:58,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 06:59:58,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:59:58,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 06:59:58,416 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:59:58,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:59:58,423 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:59:58,423 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 06:59:58,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:59:58,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-06-05 06:59:58,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:59:58,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:59:58,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:59:58,462 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-06-05 06:59:58,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:59:58,509 INFO L354 Elim1Store]: treesize reduction 38, result has 25.5 percent of original size [2021-06-05 06:59:58,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 32 [2021-06-05 06:59:58,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:59:58,521 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:59:58,522 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:59:58,522 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:48 [2021-06-05 06:59:58,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:59:58,578 INFO L354 Elim1Store]: treesize reduction 35, result has 12.5 percent of original size [2021-06-05 06:59:58,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 37 [2021-06-05 06:59:58,580 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:59:58,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:59:58,594 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:59:58,594 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:48 [2021-06-05 06:59:58,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:59:58,676 INFO L354 Elim1Store]: treesize reduction 72, result has 20.0 percent of original size [2021-06-05 06:59:58,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 42 [2021-06-05 06:59:58,677 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:59:58,692 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:59:58,695 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 06:59:58,695 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:61, output treesize:60 [2021-06-05 06:59:58,962 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:59:58,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675759636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:59:58,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:59:58,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-06-05 06:59:58,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890252815] [2021-06-05 06:59:58,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:59:58,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:59:58,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:59:58,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:59:58,963 INFO L87 Difference]: Start difference. First operand 5655 states and 20327 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 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 07:00:02,523 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 72 [2021-06-05 07:00:03,757 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 81 [2021-06-05 07:00:03,929 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 73 [2021-06-05 07:00:04,459 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 77 [2021-06-05 07:00:04,636 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 71 [2021-06-05 07:00:04,846 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 75 [2021-06-05 07:00:04,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:04,925 INFO L93 Difference]: Finished difference Result 9721 states and 32858 transitions. [2021-06-05 07:00:04,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 07:00:04,925 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 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 32 [2021-06-05 07:00:04,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:04,939 INFO L225 Difference]: With dead ends: 9721 [2021-06-05 07:00:04,939 INFO L226 Difference]: Without dead ends: 9341 [2021-06-05 07:00:04,939 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2164 ImplicationChecksByTransitivity, 4853.1ms TimeCoverageRelationStatistics Valid=1229, Invalid=6253, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 07:00:04,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9341 states. [2021-06-05 07:00:05,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9341 to 5540. [2021-06-05 07:00:05,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5540 states, 5539 states have (on average 3.6270084852861526) internal successors, (20090), 5539 states have internal predecessors, (20090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:05,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5540 states to 5540 states and 20090 transitions. [2021-06-05 07:00:05,032 INFO L78 Accepts]: Start accepts. Automaton has 5540 states and 20090 transitions. Word has length 32 [2021-06-05 07:00:05,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:05,032 INFO L482 AbstractCegarLoop]: Abstraction has 5540 states and 20090 transitions. [2021-06-05 07:00:05,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 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 07:00:05,033 INFO L276 IsEmpty]: Start isEmpty. Operand 5540 states and 20090 transitions. [2021-06-05 07:00:05,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 07:00:05,039 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:05,039 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] [2021-06-05 07:00:05,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:05,240 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:05,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:05,240 INFO L82 PathProgramCache]: Analyzing trace with hash -2125295156, now seen corresponding path program 47 times [2021-06-05 07:00:05,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:05,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038056100] [2021-06-05 07:00:05,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:05,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:05,629 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:05,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:05,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038056100] [2021-06-05 07:00:05,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038056100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:05,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049131908] [2021-06-05 07:00:05,629 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 07:00:05,654 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:00:05,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:05,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 07:00:05,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:05,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-05 07:00:05,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:05,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:05,743 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:00:05,743 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:23 [2021-06-05 07:00:05,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 07:00:05,789 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:05,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:05,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:00:05,797 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 07:00:05,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-06-05 07:00:05,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:05,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:05,858 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:00:05,858 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:27 [2021-06-05 07:00:05,900 INFO L354 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2021-06-05 07:00:05,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-06-05 07:00:05,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:05,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:05,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 07:00:05,912 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:39 [2021-06-05 07:00:06,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:00:06,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:00:06,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:00:06,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2021-06-05 07:00:06,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:06,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:06,042 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 07:00:06,042 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:41 [2021-06-05 07:00:06,129 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:06,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049131908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:06,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:06,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-05 07:00:06,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427584177] [2021-06-05 07:00:06,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 07:00:06,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:06,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 07:00:06,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2021-06-05 07:00:06,130 INFO L87 Difference]: Start difference. First operand 5540 states and 20090 transitions. Second operand has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 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 07:00:07,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:07,857 INFO L93 Difference]: Finished difference Result 8803 states and 30962 transitions. [2021-06-05 07:00:07,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 07:00:07,857 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 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 32 [2021-06-05 07:00:07,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:07,871 INFO L225 Difference]: With dead ends: 8803 [2021-06-05 07:00:07,871 INFO L226 Difference]: Without dead ends: 8465 [2021-06-05 07:00:07,871 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 1610.6ms TimeCoverageRelationStatistics Valid=462, Invalid=2844, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 07:00:07,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8465 states. [2021-06-05 07:00:07,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8465 to 6862. [2021-06-05 07:00:07,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6862 states, 6861 states have (on average 3.6003498032356798) internal successors, (24702), 6861 states have internal predecessors, (24702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:07,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6862 states to 6862 states and 24702 transitions. [2021-06-05 07:00:07,975 INFO L78 Accepts]: Start accepts. Automaton has 6862 states and 24702 transitions. Word has length 32 [2021-06-05 07:00:07,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:07,975 INFO L482 AbstractCegarLoop]: Abstraction has 6862 states and 24702 transitions. [2021-06-05 07:00:07,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 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 07:00:07,975 INFO L276 IsEmpty]: Start isEmpty. Operand 6862 states and 24702 transitions. [2021-06-05 07:00:07,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 07:00:07,984 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:07,984 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] [2021-06-05 07:00:08,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 07:00:08,186 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:08,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:08,186 INFO L82 PathProgramCache]: Analyzing trace with hash -787029172, now seen corresponding path program 48 times [2021-06-05 07:00:08,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:08,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507411340] [2021-06-05 07:00:08,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:08,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:08,624 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:08,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:08,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507411340] [2021-06-05 07:00:08,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507411340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:08,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969257979] [2021-06-05 07:00:08,625 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:08,652 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 07:00:08,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:08,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 07:00:08,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:08,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-05 07:00:08,763 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:08,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:08,772 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 07:00:08,772 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:30 [2021-06-05 07:00:08,817 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-06-05 07:00:08,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 07:00:08,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:08,828 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:08,829 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 07:00:08,829 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:39 [2021-06-05 07:00:08,912 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-06-05 07:00:08,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2021-06-05 07:00:08,913 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:08,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:08,927 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 07:00:08,927 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:52, output treesize:51 [2021-06-05 07:00:09,026 INFO L354 Elim1Store]: treesize reduction 72, result has 18.2 percent of original size [2021-06-05 07:00:09,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 38 [2021-06-05 07:00:09,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:09,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:09,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 07:00:09,047 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:64, output treesize:63 [2021-06-05 07:00:09,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:00:09,161 INFO L354 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2021-06-05 07:00:09,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-06-05 07:00:09,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:09,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:09,176 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 07:00:09,176 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:46 [2021-06-05 07:00:09,305 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:00:09,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969257979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:09,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:09,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-06-05 07:00:09,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37730700] [2021-06-05 07:00:09,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 07:00:09,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:09,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 07:00:09,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-06-05 07:00:09,306 INFO L87 Difference]: Start difference. First operand 6862 states and 24702 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 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 07:00:13,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:13,448 INFO L93 Difference]: Finished difference Result 10382 states and 35158 transitions. [2021-06-05 07:00:13,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 07:00:13,449 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 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 32 [2021-06-05 07:00:13,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:13,468 INFO L225 Difference]: With dead ends: 10382 [2021-06-05 07:00:13,468 INFO L226 Difference]: Without dead ends: 10079 [2021-06-05 07:00:13,469 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2404 ImplicationChecksByTransitivity, 3539.3ms TimeCoverageRelationStatistics Valid=964, Invalid=6518, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 07:00:13,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10079 states. [2021-06-05 07:00:13,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10079 to 7386. [2021-06-05 07:00:13,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7386 states, 7385 states have (on average 3.6106973595125256) internal successors, (26665), 7385 states have internal predecessors, (26665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:13,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7386 states to 7386 states and 26665 transitions. [2021-06-05 07:00:13,593 INFO L78 Accepts]: Start accepts. Automaton has 7386 states and 26665 transitions. Word has length 32 [2021-06-05 07:00:13,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:13,594 INFO L482 AbstractCegarLoop]: Abstraction has 7386 states and 26665 transitions. [2021-06-05 07:00:13,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 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 07:00:13,594 INFO L276 IsEmpty]: Start isEmpty. Operand 7386 states and 26665 transitions. [2021-06-05 07:00:13,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 07:00:13,603 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:13,603 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] [2021-06-05 07:00:13,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:13,804 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:13,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:13,804 INFO L82 PathProgramCache]: Analyzing trace with hash -700345780, now seen corresponding path program 49 times [2021-06-05 07:00:13,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:13,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528237348] [2021-06-05 07:00:13,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:13,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:14,228 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:14,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:14,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528237348] [2021-06-05 07:00:14,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528237348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:14,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121176995] [2021-06-05 07:00:14,228 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:14,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:14,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 07:00:14,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:14,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-05 07:00:14,349 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:14,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:14,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 07:00:14,358 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:25 [2021-06-05 07:00:14,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:00:14,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 07:00:14,401 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:14,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:14,413 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 07:00:14,413 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:37 [2021-06-05 07:00:14,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:00:14,477 INFO L354 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2021-06-05 07:00:14,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-06-05 07:00:14,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:14,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:14,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 07:00:14,495 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:49 [2021-06-05 07:00:14,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:00:14,573 INFO L354 Elim1Store]: treesize reduction 64, result has 20.0 percent of original size [2021-06-05 07:00:14,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 38 [2021-06-05 07:00:14,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:14,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:14,595 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 07:00:14,596 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:62, output treesize:61 [2021-06-05 07:00:14,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:00:14,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:00:14,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:00:14,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:00:14,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:00:14,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:00:14,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:00:14,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 38 [2021-06-05 07:00:14,790 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:14,820 INFO L628 ElimStorePlain]: treesize reduction 7, result has 88.9 percent of original size [2021-06-05 07:00:14,826 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 07:00:14,826 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:71, output treesize:51 [2021-06-05 07:00:14,973 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:14,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121176995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:14,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:14,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 27 [2021-06-05 07:00:14,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222445023] [2021-06-05 07:00:14,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 07:00:14,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:14,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 07:00:14,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:00:14,974 INFO L87 Difference]: Start difference. First operand 7386 states and 26665 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 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 07:00:19,594 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-06-05 07:00:21,314 WARN L205 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2021-06-05 07:00:22,964 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-06-05 07:00:25,294 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2021-06-05 07:00:29,599 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2021-06-05 07:00:31,667 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2021-06-05 07:00:32,916 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2021-06-05 07:00:34,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:34,477 INFO L93 Difference]: Finished difference Result 13949 states and 48004 transitions. [2021-06-05 07:00:34,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 07:00:34,477 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 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 32 [2021-06-05 07:00:34,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:34,499 INFO L225 Difference]: With dead ends: 13949 [2021-06-05 07:00:34,499 INFO L226 Difference]: Without dead ends: 12941 [2021-06-05 07:00:34,500 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1634 ImplicationChecksByTransitivity, 11767.3ms TimeCoverageRelationStatistics Valid=957, Invalid=4444, Unknown=1, NotChecked=0, Total=5402 [2021-06-05 07:00:34,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12941 states. [2021-06-05 07:00:34,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12941 to 9690. [2021-06-05 07:00:34,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9690 states, 9689 states have (on average 3.617297966766436) internal successors, (35048), 9689 states have internal predecessors, (35048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:34,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9690 states to 9690 states and 35048 transitions. [2021-06-05 07:00:34,655 INFO L78 Accepts]: Start accepts. Automaton has 9690 states and 35048 transitions. Word has length 32 [2021-06-05 07:00:34,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:34,655 INFO L482 AbstractCegarLoop]: Abstraction has 9690 states and 35048 transitions. [2021-06-05 07:00:34,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 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 07:00:34,655 INFO L276 IsEmpty]: Start isEmpty. Operand 9690 states and 35048 transitions. [2021-06-05 07:00:34,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 07:00:34,668 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:34,668 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] [2021-06-05 07:00:34,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-06-05 07:00:34,868 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:34,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:34,869 INFO L82 PathProgramCache]: Analyzing trace with hash -643597936, now seen corresponding path program 50 times [2021-06-05 07:00:34,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:34,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268309963] [2021-06-05 07:00:34,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:34,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:35,269 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:35,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:35,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268309963] [2021-06-05 07:00:35,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268309963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:35,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191399352] [2021-06-05 07:00:35,269 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:35,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:00:35,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:35,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 07:00:35,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:35,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-05 07:00:35,398 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:35,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:35,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:00:35,407 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 07:00:35,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 07:00:35,435 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:35,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:35,444 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:00:35,444 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:33 [2021-06-05 07:00:35,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-06-05 07:00:35,474 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:35,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:35,484 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:00:35,484 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:33 [2021-06-05 07:00:35,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2021-06-05 07:00:35,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:35,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:35,529 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:00:35,529 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:40 [2021-06-05 07:00:35,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:00:35,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:00:35,650 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-06-05 07:00:35,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 38 [2021-06-05 07:00:35,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:35,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:35,662 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:00:35,662 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:41 [2021-06-05 07:00:35,761 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:35,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191399352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:35,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:35,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-05 07:00:35,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624649273] [2021-06-05 07:00:35,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 07:00:35,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:35,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 07:00:35,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2021-06-05 07:00:35,762 INFO L87 Difference]: Start difference. First operand 9690 states and 35048 transitions. Second operand has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 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 07:00:36,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:36,806 INFO L93 Difference]: Finished difference Result 10881 states and 38680 transitions. [2021-06-05 07:00:36,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 07:00:36,806 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 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 32 [2021-06-05 07:00:36,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:36,824 INFO L225 Difference]: With dead ends: 10881 [2021-06-05 07:00:36,824 INFO L226 Difference]: Without dead ends: 10561 [2021-06-05 07:00:36,824 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 1148.1ms TimeCoverageRelationStatistics Valid=299, Invalid=1863, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 07:00:36,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10561 states. [2021-06-05 07:00:36,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10561 to 9690. [2021-06-05 07:00:36,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9690 states, 9689 states have (on average 3.6100732789761585) internal successors, (34978), 9689 states have internal predecessors, (34978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:36,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9690 states to 9690 states and 34978 transitions. [2021-06-05 07:00:36,981 INFO L78 Accepts]: Start accepts. Automaton has 9690 states and 34978 transitions. Word has length 32 [2021-06-05 07:00:36,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:36,981 INFO L482 AbstractCegarLoop]: Abstraction has 9690 states and 34978 transitions. [2021-06-05 07:00:36,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 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 07:00:36,981 INFO L276 IsEmpty]: Start isEmpty. Operand 9690 states and 34978 transitions. [2021-06-05 07:00:36,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 07:00:36,995 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:36,995 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] [2021-06-05 07:00:37,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:37,195 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:37,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:37,196 INFO L82 PathProgramCache]: Analyzing trace with hash 42131912, now seen corresponding path program 51 times [2021-06-05 07:00:37,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:37,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924933339] [2021-06-05 07:00:37,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:37,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:37,603 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:37,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:37,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924933339] [2021-06-05 07:00:37,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924933339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:37,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306240888] [2021-06-05 07:00:37,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:37,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:00:37,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:37,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 07:00:37,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:37,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 07:00:37,700 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:37,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:37,707 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:00:37,707 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:24 [2021-06-05 07:00:37,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:00:37,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-06-05 07:00:37,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:37,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:37,742 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:00:37,742 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:28 [2021-06-05 07:00:37,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-06-05 07:00:37,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:37,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:37,772 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:00:37,772 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:24 [2021-06-05 07:00:37,811 INFO L354 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2021-06-05 07:00:37,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-06-05 07:00:37,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:37,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:37,821 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 07:00:37,821 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:36 [2021-06-05 07:00:37,880 INFO L354 Elim1Store]: treesize reduction 64, result has 20.0 percent of original size [2021-06-05 07:00:37,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 38 [2021-06-05 07:00:37,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:37,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:37,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 07:00:37,892 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:43 [2021-06-05 07:00:37,980 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:00:37,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306240888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:37,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:37,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 24 [2021-06-05 07:00:37,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17976006] [2021-06-05 07:00:37,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 07:00:37,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:37,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 07:00:37,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:00:37,981 INFO L87 Difference]: Start difference. First operand 9690 states and 34978 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 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 07:00:38,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:38,908 INFO L93 Difference]: Finished difference Result 13901 states and 49107 transitions. [2021-06-05 07:00:38,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 07:00:38,908 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 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 32 [2021-06-05 07:00:38,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:38,964 INFO L225 Difference]: With dead ends: 13901 [2021-06-05 07:00:38,965 INFO L226 Difference]: Without dead ends: 13475 [2021-06-05 07:00:38,965 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 882.4ms TimeCoverageRelationStatistics Valid=282, Invalid=1358, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 07:00:38,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13475 states. [2021-06-05 07:00:39,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13475 to 8431. [2021-06-05 07:00:39,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8431 states, 8430 states have (on average 3.5896797153024913) internal successors, (30261), 8430 states have internal predecessors, (30261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:39,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8431 states to 8431 states and 30261 transitions. [2021-06-05 07:00:39,089 INFO L78 Accepts]: Start accepts. Automaton has 8431 states and 30261 transitions. Word has length 32 [2021-06-05 07:00:39,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:39,090 INFO L482 AbstractCegarLoop]: Abstraction has 8431 states and 30261 transitions. [2021-06-05 07:00:39,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 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 07:00:39,090 INFO L276 IsEmpty]: Start isEmpty. Operand 8431 states and 30261 transitions. [2021-06-05 07:00:39,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 07:00:39,100 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:39,100 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] [2021-06-05 07:00:39,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:39,307 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:39,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:39,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1250586420, now seen corresponding path program 52 times [2021-06-05 07:00:39,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:39,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942114762] [2021-06-05 07:00:39,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:39,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:39,643 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:39,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:39,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942114762] [2021-06-05 07:00:39,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942114762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:39,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038915457] [2021-06-05 07:00:39,643 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:39,667 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:00:39,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:39,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 07:00:39,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:39,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 07:00:39,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:39,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:39,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:00:39,782 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 07:00:39,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 07:00:39,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:39,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:39,816 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:00:39,816 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-06-05 07:00:39,857 INFO L354 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2021-06-05 07:00:39,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-06-05 07:00:39,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:39,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:39,870 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 07:00:39,870 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:44 [2021-06-05 07:00:39,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:00:39,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:00:39,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 07:00:39,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2021-06-05 07:00:39,949 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:39,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:39,959 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 07:00:39,959 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:34 [2021-06-05 07:00:40,013 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:40,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038915457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:40,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:40,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2021-06-05 07:00:40,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935480728] [2021-06-05 07:00:40,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 07:00:40,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:40,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 07:00:40,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:00:40,014 INFO L87 Difference]: Start difference. First operand 8431 states and 30261 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 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 07:00:40,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:40,633 INFO L93 Difference]: Finished difference Result 10312 states and 36179 transitions. [2021-06-05 07:00:40,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 07:00:40,633 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 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 32 [2021-06-05 07:00:40,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:40,648 INFO L225 Difference]: With dead ends: 10312 [2021-06-05 07:00:40,648 INFO L226 Difference]: Without dead ends: 10002 [2021-06-05 07:00:40,649 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 787.6ms TimeCoverageRelationStatistics Valid=241, Invalid=1241, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 07:00:40,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10002 states. [2021-06-05 07:00:40,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10002 to 8831. [2021-06-05 07:00:40,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8831 states, 8830 states have (on average 3.5691959229898074) internal successors, (31516), 8830 states have internal predecessors, (31516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:40,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8831 states to 8831 states and 31516 transitions. [2021-06-05 07:00:40,770 INFO L78 Accepts]: Start accepts. Automaton has 8831 states and 31516 transitions. Word has length 32 [2021-06-05 07:00:40,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:40,770 INFO L482 AbstractCegarLoop]: Abstraction has 8831 states and 31516 transitions. [2021-06-05 07:00:40,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 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 07:00:40,771 INFO L276 IsEmpty]: Start isEmpty. Operand 8831 states and 31516 transitions. [2021-06-05 07:00:40,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 07:00:40,782 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:40,782 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] [2021-06-05 07:00:40,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:40,982 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:40,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:40,982 INFO L82 PathProgramCache]: Analyzing trace with hash -564856572, now seen corresponding path program 53 times [2021-06-05 07:00:40,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:40,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560176612] [2021-06-05 07:00:40,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:40,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:41,316 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:41,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:41,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560176612] [2021-06-05 07:00:41,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560176612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:41,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872986019] [2021-06-05 07:00:41,317 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:41,342 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:00:41,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:41,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 07:00:41,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:41,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-05 07:00:41,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:41,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:41,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:00:41,414 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:17 [2021-06-05 07:00:41,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 07:00:41,435 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:41,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:41,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:00:41,441 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:24 [2021-06-05 07:00:41,480 INFO L354 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2021-06-05 07:00:41,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-06-05 07:00:41,483 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:41,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:41,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 07:00:41,492 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:36 [2021-06-05 07:00:41,581 INFO L354 Elim1Store]: treesize reduction 64, result has 20.0 percent of original size [2021-06-05 07:00:41,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 38 [2021-06-05 07:00:41,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:41,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:41,596 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 07:00:41,596 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:52, output treesize:51 [2021-06-05 07:00:41,768 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:41,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872986019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:41,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:41,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2021-06-05 07:00:41,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293456021] [2021-06-05 07:00:41,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 07:00:41,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:41,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 07:00:41,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-06-05 07:00:41,769 INFO L87 Difference]: Start difference. First operand 8831 states and 31516 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 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 07:00:43,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:43,360 INFO L93 Difference]: Finished difference Result 16437 states and 56867 transitions. [2021-06-05 07:00:43,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 07:00:43,360 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 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 32 [2021-06-05 07:00:43,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:43,393 INFO L225 Difference]: With dead ends: 16437 [2021-06-05 07:00:43,393 INFO L226 Difference]: Without dead ends: 15835 [2021-06-05 07:00:43,393 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1281.8ms TimeCoverageRelationStatistics Valid=422, Invalid=2334, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 07:00:43,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15835 states. [2021-06-05 07:00:43,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15835 to 8581. [2021-06-05 07:00:43,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8581 states, 8580 states have (on average 3.5440559440559443) internal successors, (30408), 8580 states have internal predecessors, (30408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:43,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8581 states to 8581 states and 30408 transitions. [2021-06-05 07:00:43,558 INFO L78 Accepts]: Start accepts. Automaton has 8581 states and 30408 transitions. Word has length 32 [2021-06-05 07:00:43,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:43,558 INFO L482 AbstractCegarLoop]: Abstraction has 8581 states and 30408 transitions. [2021-06-05 07:00:43,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 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 07:00:43,558 INFO L276 IsEmpty]: Start isEmpty. Operand 8581 states and 30408 transitions. [2021-06-05 07:00:43,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:00:43,569 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:43,569 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:00:43,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-06-05 07:00:43,770 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:43,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:43,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1781126392, now seen corresponding path program 54 times [2021-06-05 07:00:43,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:43,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826307873] [2021-06-05 07:00:43,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:43,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:43,831 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:43,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:43,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826307873] [2021-06-05 07:00:43,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826307873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:43,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532701524] [2021-06-05 07:00:43,832 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:43,856 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 07:00:43,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:43,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:00:43,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:44,041 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:00:44,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532701524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:44,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:44,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-06-05 07:00:44,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077521564] [2021-06-05 07:00:44,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:00:44,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:44,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:00:44,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:00:44,042 INFO L87 Difference]: Start difference. First operand 8581 states and 30408 transitions. Second operand has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:46,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:46,851 INFO L93 Difference]: Finished difference Result 24214 states and 79256 transitions. [2021-06-05 07:00:46,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-06-05 07:00:46,851 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have 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 07:00:46,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:46,888 INFO L225 Difference]: With dead ends: 24214 [2021-06-05 07:00:46,888 INFO L226 Difference]: Without dead ends: 24214 [2021-06-05 07:00:46,890 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7207 ImplicationChecksByTransitivity, 1827.8ms TimeCoverageRelationStatistics Valid=3677, Invalid=15505, Unknown=0, NotChecked=0, Total=19182 [2021-06-05 07:00:46,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24214 states. [2021-06-05 07:00:47,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24214 to 9398. [2021-06-05 07:00:47,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9398 states, 9397 states have (on average 3.6118974140683195) internal successors, (33941), 9397 states have internal predecessors, (33941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:47,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9398 states to 9398 states and 33941 transitions. [2021-06-05 07:00:47,156 INFO L78 Accepts]: Start accepts. Automaton has 9398 states and 33941 transitions. Word has length 36 [2021-06-05 07:00:47,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:47,156 INFO L482 AbstractCegarLoop]: Abstraction has 9398 states and 33941 transitions. [2021-06-05 07:00:47,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:47,156 INFO L276 IsEmpty]: Start isEmpty. Operand 9398 states and 33941 transitions. [2021-06-05 07:00:47,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:00:47,169 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:47,169 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:00:47,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:47,370 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:47,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:47,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1765665596, now seen corresponding path program 55 times [2021-06-05 07:00:47,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:47,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408448900] [2021-06-05 07:00:47,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:47,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:47,430 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:47,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:47,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408448900] [2021-06-05 07:00:47,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408448900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:47,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139879963] [2021-06-05 07:00:47,430 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:47,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:47,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:00:47,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:47,654 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:47,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139879963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:47,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:47,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 07:00:47,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095635394] [2021-06-05 07:00:47,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:00:47,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:47,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:00:47,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:00:47,655 INFO L87 Difference]: Start difference. First operand 9398 states and 33941 transitions. Second operand has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 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 07:00:49,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:49,072 INFO L93 Difference]: Finished difference Result 23183 states and 75907 transitions. [2021-06-05 07:00:49,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 07:00:49,073 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 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 36 [2021-06-05 07:00:49,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:49,109 INFO L225 Difference]: With dead ends: 23183 [2021-06-05 07:00:49,109 INFO L226 Difference]: Without dead ends: 23183 [2021-06-05 07:00:49,110 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2349 ImplicationChecksByTransitivity, 843.6ms TimeCoverageRelationStatistics Valid=1560, Invalid=5246, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 07:00:49,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23183 states. [2021-06-05 07:00:49,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23183 to 9263. [2021-06-05 07:00:49,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9263 states, 9262 states have (on average 3.587670049665299) internal successors, (33229), 9262 states have internal predecessors, (33229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:49,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9263 states to 9263 states and 33229 transitions. [2021-06-05 07:00:49,392 INFO L78 Accepts]: Start accepts. Automaton has 9263 states and 33229 transitions. Word has length 36 [2021-06-05 07:00:49,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:49,392 INFO L482 AbstractCegarLoop]: Abstraction has 9263 states and 33229 transitions. [2021-06-05 07:00:49,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 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 07:00:49,392 INFO L276 IsEmpty]: Start isEmpty. Operand 9263 states and 33229 transitions. [2021-06-05 07:00:49,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:00:49,404 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:49,404 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:00:49,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:49,605 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:49,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:49,605 INFO L82 PathProgramCache]: Analyzing trace with hash -610681024, now seen corresponding path program 56 times [2021-06-05 07:00:49,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:49,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576759142] [2021-06-05 07:00:49,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:49,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:49,666 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:49,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:49,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576759142] [2021-06-05 07:00:49,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576759142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:49,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600093098] [2021-06-05 07:00:49,667 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:49,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:00:49,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:49,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:00:49,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:49,834 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:49,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600093098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:49,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:49,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 07:00:49,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169264106] [2021-06-05 07:00:49,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:00:49,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:49,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:00:49,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:00:49,835 INFO L87 Difference]: Start difference. First operand 9263 states and 33229 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 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 07:00:50,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:50,737 INFO L93 Difference]: Finished difference Result 19614 states and 64898 transitions. [2021-06-05 07:00:50,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 07:00:50,737 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 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 07:00:50,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:50,768 INFO L225 Difference]: With dead ends: 19614 [2021-06-05 07:00:50,768 INFO L226 Difference]: Without dead ends: 19614 [2021-06-05 07:00:50,769 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1076 ImplicationChecksByTransitivity, 514.9ms TimeCoverageRelationStatistics Valid=763, Invalid=2777, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 07:00:50,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19614 states. [2021-06-05 07:00:51,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19614 to 9363. [2021-06-05 07:00:51,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9363 states, 9362 states have (on average 3.5803247169408245) internal successors, (33519), 9362 states have internal predecessors, (33519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:51,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9363 states to 9363 states and 33519 transitions. [2021-06-05 07:00:51,031 INFO L78 Accepts]: Start accepts. Automaton has 9363 states and 33519 transitions. Word has length 36 [2021-06-05 07:00:51,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:51,031 INFO L482 AbstractCegarLoop]: Abstraction has 9363 states and 33519 transitions. [2021-06-05 07:00:51,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 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 07:00:51,031 INFO L276 IsEmpty]: Start isEmpty. Operand 9363 states and 33519 transitions. [2021-06-05 07:00:51,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:00:51,044 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:51,044 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:00:51,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-05 07:00:51,245 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:51,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:51,245 INFO L82 PathProgramCache]: Analyzing trace with hash -2146021892, now seen corresponding path program 57 times [2021-06-05 07:00:51,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:51,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502813048] [2021-06-05 07:00:51,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:51,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:51,304 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:51,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:51,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502813048] [2021-06-05 07:00:51,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502813048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:51,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355167363] [2021-06-05 07:00:51,305 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:51,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 07:00:51,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:51,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 07:00:51,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:51,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-05 07:00:51,413 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:51,420 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:51,421 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 07:00:51,421 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:25 [2021-06-05 07:00:51,456 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-06-05 07:00:51,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 07:00:51,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:51,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:51,468 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 07:00:51,468 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:37 [2021-06-05 07:00:51,575 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-06-05 07:00:51,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2021-06-05 07:00:51,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:00:51,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:00:51,591 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 07:00:51,592 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:47, output treesize:46 [2021-06-05 07:00:51,697 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-05 07:00:51,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355167363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:51,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:51,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-06-05 07:00:51,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90776982] [2021-06-05 07:00:51,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:00:51,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:51,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:00:51,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:00:51,698 INFO L87 Difference]: Start difference. First operand 9363 states and 33519 transitions. Second operand has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 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 07:00:58,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:00:58,550 INFO L93 Difference]: Finished difference Result 23064 states and 74612 transitions. [2021-06-05 07:00:58,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2021-06-05 07:00:58,551 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 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 07:00:58,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:00:58,588 INFO L225 Difference]: With dead ends: 23064 [2021-06-05 07:00:58,588 INFO L226 Difference]: Without dead ends: 22846 [2021-06-05 07:00:58,590 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9982 ImplicationChecksByTransitivity, 3605.9ms TimeCoverageRelationStatistics Valid=3338, Invalid=23068, Unknown=0, NotChecked=0, Total=26406 [2021-06-05 07:00:58,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22846 states. [2021-06-05 07:00:58,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22846 to 10239. [2021-06-05 07:00:58,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10239 states, 10238 states have (on average 3.6391873412775935) internal successors, (37258), 10238 states have internal predecessors, (37258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:00:58,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10239 states to 10239 states and 37258 transitions. [2021-06-05 07:00:58,861 INFO L78 Accepts]: Start accepts. Automaton has 10239 states and 37258 transitions. Word has length 36 [2021-06-05 07:00:58,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:00:58,861 INFO L482 AbstractCegarLoop]: Abstraction has 10239 states and 37258 transitions. [2021-06-05 07:00:58,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 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 07:00:58,861 INFO L276 IsEmpty]: Start isEmpty. Operand 10239 states and 37258 transitions. [2021-06-05 07:00:58,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:00:58,875 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:00:58,875 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:00:59,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 07:00:59,075 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:00:59,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:00:59,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1242329482, now seen corresponding path program 58 times [2021-06-05 07:00:59,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:00:59,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363901038] [2021-06-05 07:00:59,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:00:59,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:00:59,121 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:00:59,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:00:59,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363901038] [2021-06-05 07:00:59,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363901038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:59,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075473363] [2021-06-05 07:00:59,122 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:00:59,146 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:00:59,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:00:59,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:00:59,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:00:59,303 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:00:59,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075473363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:00:59,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:00:59,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-05 07:00:59,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070602535] [2021-06-05 07:00:59,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 07:00:59,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:00:59,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 07:00:59,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-06-05 07:00:59,304 INFO L87 Difference]: Start difference. First operand 10239 states and 37258 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 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 07:01:01,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:01,374 INFO L93 Difference]: Finished difference Result 24062 states and 79366 transitions. [2021-06-05 07:01:01,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-06-05 07:01:01,375 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 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 07:01:01,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:01,414 INFO L225 Difference]: With dead ends: 24062 [2021-06-05 07:01:01,414 INFO L226 Difference]: Without dead ends: 24054 [2021-06-05 07:01:01,415 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4827 ImplicationChecksByTransitivity, 1227.2ms TimeCoverageRelationStatistics Valid=2444, Invalid=10212, Unknown=0, NotChecked=0, Total=12656 [2021-06-05 07:01:01,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24054 states. [2021-06-05 07:01:01,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24054 to 10176. [2021-06-05 07:01:01,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10176 states, 10175 states have (on average 3.6354791154791153) internal successors, (36991), 10175 states have internal predecessors, (36991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:01,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10176 states to 10176 states and 36991 transitions. [2021-06-05 07:01:01,734 INFO L78 Accepts]: Start accepts. Automaton has 10176 states and 36991 transitions. Word has length 36 [2021-06-05 07:01:01,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:01,734 INFO L482 AbstractCegarLoop]: Abstraction has 10176 states and 36991 transitions. [2021-06-05 07:01:01,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 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 07:01:01,734 INFO L276 IsEmpty]: Start isEmpty. Operand 10176 states and 36991 transitions. [2021-06-05 07:01:01,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:01:01,748 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:01,748 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:01:01,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:01,948 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:01,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:01,949 INFO L82 PathProgramCache]: Analyzing trace with hash -999630980, now seen corresponding path program 59 times [2021-06-05 07:01:01,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:01,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700660590] [2021-06-05 07:01:01,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:01,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:01,988 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:01,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:01,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700660590] [2021-06-05 07:01:01,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700660590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:01,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418055159] [2021-06-05 07:01:01,989 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:02,015 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 07:01:02,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:02,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:01:02,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:02,154 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:01:02,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418055159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:02,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:02,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-05 07:01:02,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462407434] [2021-06-05 07:01:02,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 07:01:02,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:02,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 07:01:02,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-05 07:01:02,155 INFO L87 Difference]: Start difference. First operand 10176 states and 36991 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:04,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:04,912 INFO L93 Difference]: Finished difference Result 27302 states and 90504 transitions. [2021-06-05 07:01:04,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2021-06-05 07:01:04,912 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 07:01:04,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:04,962 INFO L225 Difference]: With dead ends: 27302 [2021-06-05 07:01:04,962 INFO L226 Difference]: Without dead ends: 27302 [2021-06-05 07:01:04,963 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8677 ImplicationChecksByTransitivity, 1846.1ms TimeCoverageRelationStatistics Valid=3708, Invalid=17754, Unknown=0, NotChecked=0, Total=21462 [2021-06-05 07:01:04,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27302 states. [2021-06-05 07:01:05,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27302 to 10278. [2021-06-05 07:01:05,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10278 states, 10277 states have (on average 3.647562518244624) internal successors, (37486), 10277 states have internal predecessors, (37486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:05,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10278 states to 10278 states and 37486 transitions. [2021-06-05 07:01:05,274 INFO L78 Accepts]: Start accepts. Automaton has 10278 states and 37486 transitions. Word has length 36 [2021-06-05 07:01:05,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:05,275 INFO L482 AbstractCegarLoop]: Abstraction has 10278 states and 37486 transitions. [2021-06-05 07:01:05,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:05,275 INFO L276 IsEmpty]: Start isEmpty. Operand 10278 states and 37486 transitions. [2021-06-05 07:01:05,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:01:05,289 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:05,289 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:01:05,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:05,489 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:05,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:05,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1594791238, now seen corresponding path program 60 times [2021-06-05 07:01:05,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:05,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085164067] [2021-06-05 07:01:05,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:05,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:05,531 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:05,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:05,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085164067] [2021-06-05 07:01:05,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085164067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:05,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605741852] [2021-06-05 07:01:05,531 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:05,557 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 07:01:05,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:05,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:01:05,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:05,691 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:05,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605741852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:05,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:05,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-06-05 07:01:05,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713652107] [2021-06-05 07:01:05,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:01:05,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:05,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:01:05,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:01:05,692 INFO L87 Difference]: Start difference. First operand 10278 states and 37486 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 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 07:01:06,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:06,632 INFO L93 Difference]: Finished difference Result 23076 states and 77948 transitions. [2021-06-05 07:01:06,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 07:01:06,632 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 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 07:01:06,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:06,672 INFO L225 Difference]: With dead ends: 23076 [2021-06-05 07:01:06,672 INFO L226 Difference]: Without dead ends: 23064 [2021-06-05 07:01:06,673 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 907 ImplicationChecksByTransitivity, 544.5ms TimeCoverageRelationStatistics Valid=771, Invalid=2535, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 07:01:06,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23064 states. [2021-06-05 07:01:06,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23064 to 10277. [2021-06-05 07:01:06,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10277 states, 10276 states have (on average 3.6474309069676916) internal successors, (37481), 10276 states have internal predecessors, (37481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:06,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10277 states to 10277 states and 37481 transitions. [2021-06-05 07:01:06,990 INFO L78 Accepts]: Start accepts. Automaton has 10277 states and 37481 transitions. Word has length 36 [2021-06-05 07:01:06,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:06,991 INFO L482 AbstractCegarLoop]: Abstraction has 10277 states and 37481 transitions. [2021-06-05 07:01:06,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 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 07:01:06,991 INFO L276 IsEmpty]: Start isEmpty. Operand 10277 states and 37481 transitions. [2021-06-05 07:01:07,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:01:07,004 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:07,004 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:01:07,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:07,205 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:07,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:07,205 INFO L82 PathProgramCache]: Analyzing trace with hash 619738612, now seen corresponding path program 61 times [2021-06-05 07:01:07,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:07,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488600179] [2021-06-05 07:01:07,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:07,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:07,260 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:07,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:07,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488600179] [2021-06-05 07:01:07,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488600179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:07,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093588210] [2021-06-05 07:01:07,261 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:07,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:07,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:01:07,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:07,415 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:07,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093588210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:07,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:07,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-05 07:01:07,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860852541] [2021-06-05 07:01:07,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 07:01:07,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:07,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 07:01:07,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-06-05 07:01:07,416 INFO L87 Difference]: Start difference. First operand 10277 states and 37481 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 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 07:01:08,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:08,118 INFO L93 Difference]: Finished difference Result 21184 states and 71447 transitions. [2021-06-05 07:01:08,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 07:01:08,118 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 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 36 [2021-06-05 07:01:08,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:08,155 INFO L225 Difference]: With dead ends: 21184 [2021-06-05 07:01:08,155 INFO L226 Difference]: Without dead ends: 21184 [2021-06-05 07:01:08,155 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 722 ImplicationChecksByTransitivity, 399.5ms TimeCoverageRelationStatistics Valid=579, Invalid=1971, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 07:01:08,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21184 states. [2021-06-05 07:01:08,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21184 to 10309. [2021-06-05 07:01:08,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10309 states, 10308 states have (on average 3.646779200620877) internal successors, (37591), 10308 states have internal predecessors, (37591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:08,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10309 states to 10309 states and 37591 transitions. [2021-06-05 07:01:08,486 INFO L78 Accepts]: Start accepts. Automaton has 10309 states and 37591 transitions. Word has length 36 [2021-06-05 07:01:08,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:08,486 INFO L482 AbstractCegarLoop]: Abstraction has 10309 states and 37591 transitions. [2021-06-05 07:01:08,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 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 07:01:08,486 INFO L276 IsEmpty]: Start isEmpty. Operand 10309 states and 37591 transitions. [2021-06-05 07:01:08,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:01:08,500 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:08,500 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:01:08,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:08,700 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:08,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:08,701 INFO L82 PathProgramCache]: Analyzing trace with hash 334296516, now seen corresponding path program 62 times [2021-06-05 07:01:08,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:08,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417546677] [2021-06-05 07:01:08,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:08,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:08,772 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:08,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:08,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417546677] [2021-06-05 07:01:08,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417546677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:08,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142815152] [2021-06-05 07:01:08,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 07:01:08,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:01:08,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:08,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:01:08,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:08,947 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:08,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142815152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:08,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:08,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-05 07:01:08,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068313674] [2021-06-05 07:01:08,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:01:08,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:08,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:01:08,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:01:08,948 INFO L87 Difference]: Start difference. First operand 10309 states and 37591 transitions. Second operand has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 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 07:01:10,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:10,022 INFO L93 Difference]: Finished difference Result 22583 states and 75226 transitions. [2021-06-05 07:01:10,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 07:01:10,022 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 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 07:01:10,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:10,059 INFO L225 Difference]: With dead ends: 22583 [2021-06-05 07:01:10,059 INFO L226 Difference]: Without dead ends: 22583 [2021-06-05 07:01:10,060 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1627 ImplicationChecksByTransitivity, 663.3ms TimeCoverageRelationStatistics Valid=1128, Invalid=3984, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 07:01:10,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22583 states. [2021-06-05 07:01:10,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22583 to 10288. [2021-06-05 07:01:10,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10288 states, 10287 states have (on average 3.621950034023525) internal successors, (37259), 10287 states have internal predecessors, (37259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:10,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10288 states to 10288 states and 37259 transitions. [2021-06-05 07:01:10,340 INFO L78 Accepts]: Start accepts. Automaton has 10288 states and 37259 transitions. Word has length 36 [2021-06-05 07:01:10,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:10,340 INFO L482 AbstractCegarLoop]: Abstraction has 10288 states and 37259 transitions. [2021-06-05 07:01:10,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 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 07:01:10,340 INFO L276 IsEmpty]: Start isEmpty. Operand 10288 states and 37259 transitions. [2021-06-05 07:01:10,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:01:10,354 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:10,354 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:01:10,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:10,555 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:10,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:10,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1645233024, now seen corresponding path program 63 times [2021-06-05 07:01:10,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:10,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779274417] [2021-06-05 07:01:10,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:10,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:10,608 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:10,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:10,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779274417] [2021-06-05 07:01:10,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779274417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:10,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012214713] [2021-06-05 07:01:10,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:10,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 07:01:10,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:10,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 07:01:10,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:10,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-05 07:01:10,734 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:01:10,740 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:01:10,740 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:01:10,740 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:22 [2021-06-05 07:01:10,770 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-06-05 07:01:10,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 07:01:10,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:01:10,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:01:10,780 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 07:01:10,780 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:34 [2021-06-05 07:01:10,851 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-06-05 07:01:10,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2021-06-05 07:01:10,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:01:10,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:01:10,866 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 07:01:10,866 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:49 [2021-06-05 07:01:11,068 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-06-05 07:01:11,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012214713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:11,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:11,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-06-05 07:01:11,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999610476] [2021-06-05 07:01:11,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 07:01:11,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:11,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 07:01:11,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:01:11,069 INFO L87 Difference]: Start difference. First operand 10288 states and 37259 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 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 07:01:15,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:15,112 INFO L93 Difference]: Finished difference Result 20591 states and 67124 transitions. [2021-06-05 07:01:15,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-06-05 07:01:15,113 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 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 36 [2021-06-05 07:01:15,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:15,143 INFO L225 Difference]: With dead ends: 20591 [2021-06-05 07:01:15,143 INFO L226 Difference]: Without dead ends: 20576 [2021-06-05 07:01:15,144 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5098 ImplicationChecksByTransitivity, 2727.4ms TimeCoverageRelationStatistics Valid=1942, Invalid=12578, Unknown=0, NotChecked=0, Total=14520 [2021-06-05 07:01:15,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20576 states. [2021-06-05 07:01:15,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20576 to 11680. [2021-06-05 07:01:15,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11680 states, 11679 states have (on average 3.5503895881496703) internal successors, (41465), 11679 states have internal predecessors, (41465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:15,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11680 states to 11680 states and 41465 transitions. [2021-06-05 07:01:15,399 INFO L78 Accepts]: Start accepts. Automaton has 11680 states and 41465 transitions. Word has length 36 [2021-06-05 07:01:15,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:15,399 INFO L482 AbstractCegarLoop]: Abstraction has 11680 states and 41465 transitions. [2021-06-05 07:01:15,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 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 07:01:15,399 INFO L276 IsEmpty]: Start isEmpty. Operand 11680 states and 41465 transitions. [2021-06-05 07:01:15,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:01:15,415 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:15,415 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:01:15,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-06-05 07:01:15,615 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:15,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:15,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1594356878, now seen corresponding path program 64 times [2021-06-05 07:01:15,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:15,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918592806] [2021-06-05 07:01:15,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:15,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:15,669 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:15,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:15,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918592806] [2021-06-05 07:01:15,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918592806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:15,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079733962] [2021-06-05 07:01:15,669 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:15,692 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:01:15,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:15,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:01:15,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:15,840 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:01:15,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079733962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:15,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:15,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 07:01:15,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068349283] [2021-06-05 07:01:15,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:01:15,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:15,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:01:15,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:01:15,841 INFO L87 Difference]: Start difference. First operand 11680 states and 41465 transitions. Second operand has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 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 07:01:18,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:18,012 INFO L93 Difference]: Finished difference Result 24526 states and 80567 transitions. [2021-06-05 07:01:18,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-06-05 07:01:18,013 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 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 07:01:18,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:18,058 INFO L225 Difference]: With dead ends: 24526 [2021-06-05 07:01:18,058 INFO L226 Difference]: Without dead ends: 24518 [2021-06-05 07:01:18,059 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5034 ImplicationChecksByTransitivity, 1363.8ms TimeCoverageRelationStatistics Valid=2276, Invalid=11766, Unknown=0, NotChecked=0, Total=14042 [2021-06-05 07:01:18,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24518 states. [2021-06-05 07:01:18,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24518 to 10224. [2021-06-05 07:01:18,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10224 states, 10223 states have (on average 3.5769343636897193) internal successors, (36567), 10223 states have internal predecessors, (36567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:18,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10224 states to 10224 states and 36567 transitions. [2021-06-05 07:01:18,384 INFO L78 Accepts]: Start accepts. Automaton has 10224 states and 36567 transitions. Word has length 36 [2021-06-05 07:01:18,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:18,385 INFO L482 AbstractCegarLoop]: Abstraction has 10224 states and 36567 transitions. [2021-06-05 07:01:18,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 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 07:01:18,385 INFO L276 IsEmpty]: Start isEmpty. Operand 10224 states and 36567 transitions. [2021-06-05 07:01:18,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:01:18,399 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:18,399 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:18,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:18,600 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:18,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:18,600 INFO L82 PathProgramCache]: Analyzing trace with hash 649769798, now seen corresponding path program 22 times [2021-06-05 07:01:18,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:18,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649085158] [2021-06-05 07:01:18,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:18,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:18,665 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:18,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:18,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649085158] [2021-06-05 07:01:18,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649085158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:18,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990247960] [2021-06-05 07:01:18,665 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:18,689 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:01:18,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:18,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:01:18,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:18,828 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:18,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990247960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:18,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:18,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-05 07:01:18,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069878695] [2021-06-05 07:01:18,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:01:18,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:18,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:01:18,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:01:18,829 INFO L87 Difference]: Start difference. First operand 10224 states and 36567 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 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 07:01:19,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:19,962 INFO L93 Difference]: Finished difference Result 23351 states and 75809 transitions. [2021-06-05 07:01:19,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 07:01:19,962 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 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 36 [2021-06-05 07:01:19,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:19,999 INFO L225 Difference]: With dead ends: 23351 [2021-06-05 07:01:20,000 INFO L226 Difference]: Without dead ends: 23351 [2021-06-05 07:01:20,000 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1978 ImplicationChecksByTransitivity, 727.7ms TimeCoverageRelationStatistics Valid=1338, Invalid=4514, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 07:01:20,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23351 states. [2021-06-05 07:01:20,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23351 to 10314. [2021-06-05 07:01:20,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10314 states, 10313 states have (on average 3.570638999321245) internal successors, (36824), 10313 states have internal predecessors, (36824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:20,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10314 states to 10314 states and 36824 transitions. [2021-06-05 07:01:20,275 INFO L78 Accepts]: Start accepts. Automaton has 10314 states and 36824 transitions. Word has length 36 [2021-06-05 07:01:20,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:20,275 INFO L482 AbstractCegarLoop]: Abstraction has 10314 states and 36824 transitions. [2021-06-05 07:01:20,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 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 07:01:20,275 INFO L276 IsEmpty]: Start isEmpty. Operand 10314 states and 36824 transitions. [2021-06-05 07:01:20,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:01:20,290 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:20,290 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:20,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-05 07:01:20,490 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:20,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:20,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1914163660, now seen corresponding path program 23 times [2021-06-05 07:01:20,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:20,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085032453] [2021-06-05 07:01:20,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:20,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:20,541 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:20,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:20,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085032453] [2021-06-05 07:01:20,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085032453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:20,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145673574] [2021-06-05 07:01:20,542 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:20,622 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 07:01:20,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:20,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:01:20,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:20,765 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:01:20,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145673574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:20,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:20,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 07:01:20,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461996296] [2021-06-05 07:01:20,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:01:20,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:20,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:01:20,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:01:20,766 INFO L87 Difference]: Start difference. First operand 10314 states and 36824 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 21 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 07:01:23,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:23,988 INFO L93 Difference]: Finished difference Result 25345 states and 80932 transitions. [2021-06-05 07:01:23,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2021-06-05 07:01:23,989 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 21 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 36 [2021-06-05 07:01:23,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:24,037 INFO L225 Difference]: With dead ends: 25345 [2021-06-05 07:01:24,037 INFO L226 Difference]: Without dead ends: 25341 [2021-06-05 07:01:24,040 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12290 ImplicationChecksByTransitivity, 2259.7ms TimeCoverageRelationStatistics Valid=4827, Invalid=25275, Unknown=0, NotChecked=0, Total=30102 [2021-06-05 07:01:24,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25341 states. [2021-06-05 07:01:24,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25341 to 10697. [2021-06-05 07:01:24,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10697 states, 10696 states have (on average 3.5331899775617055) internal successors, (37791), 10696 states have internal predecessors, (37791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:24,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10697 states to 10697 states and 37791 transitions. [2021-06-05 07:01:24,371 INFO L78 Accepts]: Start accepts. Automaton has 10697 states and 37791 transitions. Word has length 36 [2021-06-05 07:01:24,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:24,371 INFO L482 AbstractCegarLoop]: Abstraction has 10697 states and 37791 transitions. [2021-06-05 07:01:24,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 21 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 07:01:24,371 INFO L276 IsEmpty]: Start isEmpty. Operand 10697 states and 37791 transitions. [2021-06-05 07:01:24,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:01:24,385 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:24,385 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:01:24,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-06-05 07:01:24,585 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:24,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:24,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1955379200, now seen corresponding path program 65 times [2021-06-05 07:01:24,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:24,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88479719] [2021-06-05 07:01:24,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:24,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:24,623 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:01:24,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:24,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88479719] [2021-06-05 07:01:24,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88479719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:24,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592559715] [2021-06-05 07:01:24,624 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:24,652 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 07:01:24,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:24,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:01:24,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:24,774 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:24,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592559715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:24,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:24,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 07:01:24,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046512228] [2021-06-05 07:01:24,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:01:24,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:24,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:01:24,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:01:24,775 INFO L87 Difference]: Start difference. First operand 10697 states and 37791 transitions. Second operand has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 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 07:01:25,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:25,744 INFO L93 Difference]: Finished difference Result 28584 states and 95318 transitions. [2021-06-05 07:01:25,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 07:01:25,744 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 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 36 [2021-06-05 07:01:25,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:25,798 INFO L225 Difference]: With dead ends: 28584 [2021-06-05 07:01:25,798 INFO L226 Difference]: Without dead ends: 28584 [2021-06-05 07:01:25,798 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1334 ImplicationChecksByTransitivity, 529.9ms TimeCoverageRelationStatistics Valid=1025, Invalid=2757, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 07:01:25,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28584 states. [2021-06-05 07:01:26,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28584 to 11040. [2021-06-05 07:01:26,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11040 states, 11039 states have (on average 3.5667179998188243) internal successors, (39373), 11039 states have internal predecessors, (39373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:26,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11040 states to 11040 states and 39373 transitions. [2021-06-05 07:01:26,156 INFO L78 Accepts]: Start accepts. Automaton has 11040 states and 39373 transitions. Word has length 36 [2021-06-05 07:01:26,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:26,156 INFO L482 AbstractCegarLoop]: Abstraction has 11040 states and 39373 transitions. [2021-06-05 07:01:26,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 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 07:01:26,156 INFO L276 IsEmpty]: Start isEmpty. Operand 11040 states and 39373 transitions. [2021-06-05 07:01:26,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:01:26,171 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:26,171 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:01:26,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:26,372 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:26,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:26,372 INFO L82 PathProgramCache]: Analyzing trace with hash 835382162, now seen corresponding path program 66 times [2021-06-05 07:01:26,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:26,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778010318] [2021-06-05 07:01:26,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:26,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:26,410 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:26,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:26,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778010318] [2021-06-05 07:01:26,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778010318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:26,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917434290] [2021-06-05 07:01:26,410 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:26,436 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 07:01:26,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:26,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:01:26,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:26,587 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:01:26,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917434290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:26,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:26,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-05 07:01:26,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714655653] [2021-06-05 07:01:26,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 07:01:26,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:26,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 07:01:26,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-06-05 07:01:26,588 INFO L87 Difference]: Start difference. First operand 11040 states and 39373 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 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 07:01:28,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:28,627 INFO L93 Difference]: Finished difference Result 28065 states and 91868 transitions. [2021-06-05 07:01:28,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-06-05 07:01:28,627 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 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 07:01:28,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:28,677 INFO L225 Difference]: With dead ends: 28065 [2021-06-05 07:01:28,677 INFO L226 Difference]: Without dead ends: 28057 [2021-06-05 07:01:28,678 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4765 ImplicationChecksByTransitivity, 1285.0ms TimeCoverageRelationStatistics Valid=2261, Invalid=10171, Unknown=0, NotChecked=0, Total=12432 [2021-06-05 07:01:28,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28057 states. [2021-06-05 07:01:28,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28057 to 11031. [2021-06-05 07:01:28,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11031 states, 11030 states have (on average 3.565185856754306) internal successors, (39324), 11030 states have internal predecessors, (39324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:29,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11031 states to 11031 states and 39324 transitions. [2021-06-05 07:01:29,026 INFO L78 Accepts]: Start accepts. Automaton has 11031 states and 39324 transitions. Word has length 36 [2021-06-05 07:01:29,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:29,026 INFO L482 AbstractCegarLoop]: Abstraction has 11031 states and 39324 transitions. [2021-06-05 07:01:29,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 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 07:01:29,026 INFO L276 IsEmpty]: Start isEmpty. Operand 11031 states and 39324 transitions. [2021-06-05 07:01:29,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:01:29,041 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:29,041 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:01:29,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:29,242 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:29,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:29,242 INFO L82 PathProgramCache]: Analyzing trace with hash -645736056, now seen corresponding path program 67 times [2021-06-05 07:01:29,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:29,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448071546] [2021-06-05 07:01:29,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:29,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:29,290 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:29,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:29,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448071546] [2021-06-05 07:01:29,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448071546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:29,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999856104] [2021-06-05 07:01:29,292 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 07:01:29,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:29,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:01:29,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:29,471 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:29,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999856104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:29,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:29,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-05 07:01:29,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546509359] [2021-06-05 07:01:29,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 07:01:29,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:29,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 07:01:29,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-06-05 07:01:29,472 INFO L87 Difference]: Start difference. First operand 11031 states and 39324 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 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 07:01:30,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:30,744 INFO L93 Difference]: Finished difference Result 25852 states and 84621 transitions. [2021-06-05 07:01:30,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 07:01:30,745 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 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 07:01:30,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:30,787 INFO L225 Difference]: With dead ends: 25852 [2021-06-05 07:01:30,787 INFO L226 Difference]: Without dead ends: 25852 [2021-06-05 07:01:30,787 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1736 ImplicationChecksByTransitivity, 778.7ms TimeCoverageRelationStatistics Valid=1383, Invalid=4019, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 07:01:30,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25852 states. [2021-06-05 07:01:31,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25852 to 11109. [2021-06-05 07:01:31,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11109 states, 11108 states have (on average 3.5620273676629455) internal successors, (39567), 11108 states have internal predecessors, (39567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:31,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11109 states to 11109 states and 39567 transitions. [2021-06-05 07:01:31,082 INFO L78 Accepts]: Start accepts. Automaton has 11109 states and 39567 transitions. Word has length 36 [2021-06-05 07:01:31,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:31,083 INFO L482 AbstractCegarLoop]: Abstraction has 11109 states and 39567 transitions. [2021-06-05 07:01:31,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 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 07:01:31,083 INFO L276 IsEmpty]: Start isEmpty. Operand 11109 states and 39567 transitions. [2021-06-05 07:01:31,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:01:31,097 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:31,097 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:01:31,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:31,298 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:31,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:31,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1701113450, now seen corresponding path program 68 times [2021-06-05 07:01:31,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:31,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847042498] [2021-06-05 07:01:31,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:31,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:31,342 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:31,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:31,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847042498] [2021-06-05 07:01:31,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847042498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:31,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100052718] [2021-06-05 07:01:31,342 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:31,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:01:31,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:31,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:01:31,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:31,508 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:01:31,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100052718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:31,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:31,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 07:01:31,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468713078] [2021-06-05 07:01:31,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:01:31,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:31,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:01:31,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:01:31,509 INFO L87 Difference]: Start difference. First operand 11109 states and 39567 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 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 07:01:33,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:33,904 INFO L93 Difference]: Finished difference Result 26133 states and 85715 transitions. [2021-06-05 07:01:33,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-06-05 07:01:33,904 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 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 07:01:33,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:33,946 INFO L225 Difference]: With dead ends: 26133 [2021-06-05 07:01:33,946 INFO L226 Difference]: Without dead ends: 26125 [2021-06-05 07:01:33,947 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5792 ImplicationChecksByTransitivity, 1391.9ms TimeCoverageRelationStatistics Valid=2641, Invalid=12859, Unknown=0, NotChecked=0, Total=15500 [2021-06-05 07:01:33,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26125 states. [2021-06-05 07:01:34,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26125 to 10815. [2021-06-05 07:01:34,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10815 states, 10814 states have (on average 3.549935269095617) internal successors, (38389), 10814 states have internal predecessors, (38389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:34,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10815 states to 10815 states and 38389 transitions. [2021-06-05 07:01:34,243 INFO L78 Accepts]: Start accepts. Automaton has 10815 states and 38389 transitions. Word has length 36 [2021-06-05 07:01:34,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:34,243 INFO L482 AbstractCegarLoop]: Abstraction has 10815 states and 38389 transitions. [2021-06-05 07:01:34,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 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 07:01:34,244 INFO L276 IsEmpty]: Start isEmpty. Operand 10815 states and 38389 transitions. [2021-06-05 07:01:34,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:01:34,258 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:34,258 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:01:34,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2021-06-05 07:01:34,458 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:34,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:34,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1129408980, now seen corresponding path program 69 times [2021-06-05 07:01:34,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:34,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627662997] [2021-06-05 07:01:34,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:34,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:34,502 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:34,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:34,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627662997] [2021-06-05 07:01:34,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627662997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:34,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359597242] [2021-06-05 07:01:34,503 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:34,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 07:01:34,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:34,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:01:34,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:34,645 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:34,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359597242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:34,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:34,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 07:01:34,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754562714] [2021-06-05 07:01:34,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:01:34,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:34,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:01:34,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:01:34,646 INFO L87 Difference]: Start difference. First operand 10815 states and 38389 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 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 07:01:36,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:36,147 INFO L93 Difference]: Finished difference Result 25481 states and 83280 transitions. [2021-06-05 07:01:36,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-06-05 07:01:36,147 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 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 36 [2021-06-05 07:01:36,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:36,191 INFO L225 Difference]: With dead ends: 25481 [2021-06-05 07:01:36,191 INFO L226 Difference]: Without dead ends: 25421 [2021-06-05 07:01:36,192 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3412 ImplicationChecksByTransitivity, 951.5ms TimeCoverageRelationStatistics Valid=1884, Invalid=7622, Unknown=0, NotChecked=0, Total=9506 [2021-06-05 07:01:36,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25421 states. [2021-06-05 07:01:36,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25421 to 10825. [2021-06-05 07:01:36,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10825 states, 10824 states have (on average 3.5495195861049518) internal successors, (38420), 10824 states have internal predecessors, (38420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:36,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10825 states to 10825 states and 38420 transitions. [2021-06-05 07:01:36,582 INFO L78 Accepts]: Start accepts. Automaton has 10825 states and 38420 transitions. Word has length 36 [2021-06-05 07:01:36,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:36,583 INFO L482 AbstractCegarLoop]: Abstraction has 10825 states and 38420 transitions. [2021-06-05 07:01:36,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 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 07:01:36,583 INFO L276 IsEmpty]: Start isEmpty. Operand 10825 states and 38420 transitions. [2021-06-05 07:01:36,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:01:36,599 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:36,599 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:01:36,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:36,800 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:36,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:36,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1944063276, now seen corresponding path program 70 times [2021-06-05 07:01:36,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:36,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897420853] [2021-06-05 07:01:36,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:36,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:36,847 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:36,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:36,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897420853] [2021-06-05 07:01:36,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897420853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:36,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204014495] [2021-06-05 07:01:36,848 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 07:01:36,875 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:01:36,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:36,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:36,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:37,010 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:37,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204014495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:37,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:37,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 07:01:37,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216749738] [2021-06-05 07:01:37,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:01:37,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:37,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:01:37,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:01:37,011 INFO L87 Difference]: Start difference. First operand 10825 states and 38420 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 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 07:01:38,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:38,129 INFO L93 Difference]: Finished difference Result 25553 states and 83090 transitions. [2021-06-05 07:01:38,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 07:01:38,129 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 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 36 [2021-06-05 07:01:38,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:38,175 INFO L225 Difference]: With dead ends: 25553 [2021-06-05 07:01:38,175 INFO L226 Difference]: Without dead ends: 25553 [2021-06-05 07:01:38,176 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1685 ImplicationChecksByTransitivity, 635.2ms TimeCoverageRelationStatistics Valid=1205, Invalid=3625, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 07:01:38,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25553 states. [2021-06-05 07:01:38,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25553 to 11156. [2021-06-05 07:01:38,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11156 states, 11155 states have (on average 3.528731510533393) internal successors, (39363), 11155 states have internal predecessors, (39363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:38,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11156 states to 11156 states and 39363 transitions. [2021-06-05 07:01:38,504 INFO L78 Accepts]: Start accepts. Automaton has 11156 states and 39363 transitions. Word has length 36 [2021-06-05 07:01:38,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:38,504 INFO L482 AbstractCegarLoop]: Abstraction has 11156 states and 39363 transitions. [2021-06-05 07:01:38,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 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 07:01:38,504 INFO L276 IsEmpty]: Start isEmpty. Operand 11156 states and 39363 transitions. [2021-06-05 07:01:38,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:01:38,521 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:38,521 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:01:38,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-06-05 07:01:38,721 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:38,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:38,722 INFO L82 PathProgramCache]: Analyzing trace with hash -417474388, now seen corresponding path program 71 times [2021-06-05 07:01:38,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:38,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387446774] [2021-06-05 07:01:38,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:38,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:38,765 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:38,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:38,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387446774] [2021-06-05 07:01:38,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387446774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:38,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494342113] [2021-06-05 07:01:38,765 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:38,797 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 07:01:38,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:38,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:01:38,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:38,935 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:38,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494342113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:38,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:38,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-05 07:01:38,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67190660] [2021-06-05 07:01:38,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 07:01:38,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:38,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 07:01:38,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 07:01:38,936 INFO L87 Difference]: Start difference. First operand 11156 states and 39363 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 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 07:01:40,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:40,535 INFO L93 Difference]: Finished difference Result 24060 states and 79445 transitions. [2021-06-05 07:01:40,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-06-05 07:01:40,535 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 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 07:01:40,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:40,631 INFO L225 Difference]: With dead ends: 24060 [2021-06-05 07:01:40,631 INFO L226 Difference]: Without dead ends: 23988 [2021-06-05 07:01:40,632 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3341 ImplicationChecksByTransitivity, 999.4ms TimeCoverageRelationStatistics Valid=1989, Invalid=7323, Unknown=0, NotChecked=0, Total=9312 [2021-06-05 07:01:40,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23988 states. [2021-06-05 07:01:40,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23988 to 11635. [2021-06-05 07:01:40,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11635 states, 11634 states have (on average 3.5373044524669073) internal successors, (41153), 11634 states have internal predecessors, (41153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:40,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11635 states to 11635 states and 41153 transitions. [2021-06-05 07:01:40,886 INFO L78 Accepts]: Start accepts. Automaton has 11635 states and 41153 transitions. Word has length 36 [2021-06-05 07:01:40,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:40,886 INFO L482 AbstractCegarLoop]: Abstraction has 11635 states and 41153 transitions. [2021-06-05 07:01:40,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 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 07:01:40,887 INFO L276 IsEmpty]: Start isEmpty. Operand 11635 states and 41153 transitions. [2021-06-05 07:01:40,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:01:40,902 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:40,902 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:01:41,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:41,112 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:41,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:41,112 INFO L82 PathProgramCache]: Analyzing trace with hash -56872508, now seen corresponding path program 72 times [2021-06-05 07:01:41,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:41,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615400611] [2021-06-05 07:01:41,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:41,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:41,150 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:01:41,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:41,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615400611] [2021-06-05 07:01:41,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615400611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:41,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102279578] [2021-06-05 07:01:41,150 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:41,174 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 07:01:41,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:41,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:01:41,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:41,315 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:41,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102279578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:41,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:41,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-05 07:01:41,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028374855] [2021-06-05 07:01:41,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 07:01:41,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:41,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 07:01:41,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-06-05 07:01:41,316 INFO L87 Difference]: Start difference. First operand 11635 states and 41153 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:43,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:43,692 INFO L93 Difference]: Finished difference Result 32188 states and 105890 transitions. [2021-06-05 07:01:43,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-06-05 07:01:43,693 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 07:01:43,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:43,750 INFO L225 Difference]: With dead ends: 32188 [2021-06-05 07:01:43,750 INFO L226 Difference]: Without dead ends: 32188 [2021-06-05 07:01:43,751 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7629 ImplicationChecksByTransitivity, 1621.7ms TimeCoverageRelationStatistics Valid=3449, Invalid=15183, Unknown=0, NotChecked=0, Total=18632 [2021-06-05 07:01:43,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32188 states. [2021-06-05 07:01:44,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32188 to 11859. [2021-06-05 07:01:44,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11859 states, 11858 states have (on average 3.5428402766065106) internal successors, (42011), 11858 states have internal predecessors, (42011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:44,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11859 states to 11859 states and 42011 transitions. [2021-06-05 07:01:44,185 INFO L78 Accepts]: Start accepts. Automaton has 11859 states and 42011 transitions. Word has length 36 [2021-06-05 07:01:44,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:44,186 INFO L482 AbstractCegarLoop]: Abstraction has 11859 states and 42011 transitions. [2021-06-05 07:01:44,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:44,186 INFO L276 IsEmpty]: Start isEmpty. Operand 11859 states and 42011 transitions. [2021-06-05 07:01:44,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:01:44,201 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:44,201 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:01:44,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:44,401 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:44,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:44,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1328456694, now seen corresponding path program 73 times [2021-06-05 07:01:44,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:44,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701775641] [2021-06-05 07:01:44,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:44,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:44,451 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:44,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:44,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701775641] [2021-06-05 07:01:44,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701775641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:44,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323207017] [2021-06-05 07:01:44,452 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:44,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:44,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:01:44,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:44,616 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:44,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323207017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:44,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:44,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-05 07:01:44,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520616945] [2021-06-05 07:01:44,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 07:01:44,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:44,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 07:01:44,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-06-05 07:01:44,617 INFO L87 Difference]: Start difference. First operand 11859 states and 42011 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 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 07:01:45,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:45,455 INFO L93 Difference]: Finished difference Result 21337 states and 71691 transitions. [2021-06-05 07:01:45,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 07:01:45,456 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 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 07:01:45,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:45,501 INFO L225 Difference]: With dead ends: 21337 [2021-06-05 07:01:45,501 INFO L226 Difference]: Without dead ends: 21337 [2021-06-05 07:01:45,501 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 957 ImplicationChecksByTransitivity, 444.3ms TimeCoverageRelationStatistics Valid=705, Invalid=2375, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 07:01:45,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21337 states. [2021-06-05 07:01:45,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21337 to 12014. [2021-06-05 07:01:45,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12014 states, 12013 states have (on average 3.539082660451178) internal successors, (42515), 12013 states have internal predecessors, (42515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:45,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12014 states to 12014 states and 42515 transitions. [2021-06-05 07:01:45,776 INFO L78 Accepts]: Start accepts. Automaton has 12014 states and 42515 transitions. Word has length 36 [2021-06-05 07:01:45,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:45,776 INFO L482 AbstractCegarLoop]: Abstraction has 12014 states and 42515 transitions. [2021-06-05 07:01:45,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 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 07:01:45,776 INFO L276 IsEmpty]: Start isEmpty. Operand 12014 states and 42515 transitions. [2021-06-05 07:01:45,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:01:45,793 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:45,793 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:01:46,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-06-05 07:01:46,005 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:46,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:46,005 INFO L82 PathProgramCache]: Analyzing trace with hash -757061290, now seen corresponding path program 74 times [2021-06-05 07:01:46,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:46,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752167928] [2021-06-05 07:01:46,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:46,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:46,049 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:46,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:46,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752167928] [2021-06-05 07:01:46,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752167928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:46,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673855160] [2021-06-05 07:01:46,049 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:46,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:01:46,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:46,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:01:46,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:46,201 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:01:46,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673855160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:46,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:46,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-05 07:01:46,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103160313] [2021-06-05 07:01:46,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 07:01:46,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:46,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 07:01:46,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-06-05 07:01:46,202 INFO L87 Difference]: Start difference. First operand 12014 states and 42515 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 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 07:01:47,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:47,816 INFO L93 Difference]: Finished difference Result 23584 states and 78972 transitions. [2021-06-05 07:01:47,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-06-05 07:01:47,816 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 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 07:01:47,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:47,856 INFO L225 Difference]: With dead ends: 23584 [2021-06-05 07:01:47,857 INFO L226 Difference]: Without dead ends: 23568 [2021-06-05 07:01:47,858 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4149 ImplicationChecksByTransitivity, 1058.2ms TimeCoverageRelationStatistics Valid=2031, Invalid=9311, Unknown=0, NotChecked=0, Total=11342 [2021-06-05 07:01:47,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23568 states. [2021-06-05 07:01:48,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23568 to 12014. [2021-06-05 07:01:48,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12014 states, 12013 states have (on average 3.5387496878381755) internal successors, (42511), 12013 states have internal predecessors, (42511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:48,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12014 states to 12014 states and 42511 transitions. [2021-06-05 07:01:48,177 INFO L78 Accepts]: Start accepts. Automaton has 12014 states and 42511 transitions. Word has length 36 [2021-06-05 07:01:48,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:48,177 INFO L482 AbstractCegarLoop]: Abstraction has 12014 states and 42511 transitions. [2021-06-05 07:01:48,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 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 07:01:48,177 INFO L276 IsEmpty]: Start isEmpty. Operand 12014 states and 42511 transitions. [2021-06-05 07:01:48,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:01:48,192 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:48,192 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:01:48,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:48,394 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:48,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:48,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1893700292, now seen corresponding path program 24 times [2021-06-05 07:01:48,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:48,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335569363] [2021-06-05 07:01:48,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:48,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:48,440 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:01:48,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:48,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335569363] [2021-06-05 07:01:48,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335569363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:48,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385456757] [2021-06-05 07:01:48,440 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:48,464 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 07:01:48,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:48,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:01:48,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:48,598 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:01:48,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385456757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:48,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:48,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 07:01:48,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132502029] [2021-06-05 07:01:48,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:01:48,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:48,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:01:48,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:01:48,599 INFO L87 Difference]: Start difference. First operand 12014 states and 42511 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 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 07:01:52,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:52,117 INFO L93 Difference]: Finished difference Result 24185 states and 80281 transitions. [2021-06-05 07:01:52,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 188 states. [2021-06-05 07:01:52,118 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 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 07:01:52,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:52,154 INFO L225 Difference]: With dead ends: 24185 [2021-06-05 07:01:52,154 INFO L226 Difference]: Without dead ends: 24161 [2021-06-05 07:01:52,156 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15417 ImplicationChecksByTransitivity, 2497.3ms TimeCoverageRelationStatistics Valid=5544, Invalid=31128, Unknown=0, NotChecked=0, Total=36672 [2021-06-05 07:01:52,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24161 states. [2021-06-05 07:01:52,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24161 to 12318. [2021-06-05 07:01:52,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12318 states, 12317 states have (on average 3.522935779816514) internal successors, (43392), 12317 states have internal predecessors, (43392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:52,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12318 states to 12318 states and 43392 transitions. [2021-06-05 07:01:52,434 INFO L78 Accepts]: Start accepts. Automaton has 12318 states and 43392 transitions. Word has length 36 [2021-06-05 07:01:52,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:52,434 INFO L482 AbstractCegarLoop]: Abstraction has 12318 states and 43392 transitions. [2021-06-05 07:01:52,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 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 07:01:52,434 INFO L276 IsEmpty]: Start isEmpty. Operand 12318 states and 43392 transitions. [2021-06-05 07:01:52,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:01:52,450 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:52,450 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:01:52,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:52,650 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:52,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:52,651 INFO L82 PathProgramCache]: Analyzing trace with hash 14650632, now seen corresponding path program 75 times [2021-06-05 07:01:52,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:52,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024273950] [2021-06-05 07:01:52,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:52,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:52,701 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:52,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:52,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024273950] [2021-06-05 07:01:52,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024273950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:52,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862071162] [2021-06-05 07:01:52,701 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:52,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 07:01:52,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:52,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:01:52,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:52,852 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:52,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862071162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:52,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:52,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-06-05 07:01:52,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185188097] [2021-06-05 07:01:52,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 07:01:52,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:52,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 07:01:52,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-06-05 07:01:52,853 INFO L87 Difference]: Start difference. First operand 12318 states and 43392 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 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 07:01:53,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:53,824 INFO L93 Difference]: Finished difference Result 30224 states and 99175 transitions. [2021-06-05 07:01:53,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 07:01:53,824 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 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 07:01:53,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:53,878 INFO L225 Difference]: With dead ends: 30224 [2021-06-05 07:01:53,878 INFO L226 Difference]: Without dead ends: 30224 [2021-06-05 07:01:53,879 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1168 ImplicationChecksByTransitivity, 573.6ms TimeCoverageRelationStatistics Valid=959, Invalid=2701, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 07:01:53,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30224 states. [2021-06-05 07:01:54,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30224 to 13376. [2021-06-05 07:01:54,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13376 states, 13375 states have (on average 3.5404859813084113) internal successors, (47354), 13375 states have internal predecessors, (47354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:54,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13376 states to 13376 states and 47354 transitions. [2021-06-05 07:01:54,258 INFO L78 Accepts]: Start accepts. Automaton has 13376 states and 47354 transitions. Word has length 36 [2021-06-05 07:01:54,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:54,258 INFO L482 AbstractCegarLoop]: Abstraction has 13376 states and 47354 transitions. [2021-06-05 07:01:54,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 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 07:01:54,258 INFO L276 IsEmpty]: Start isEmpty. Operand 13376 states and 47354 transitions. [2021-06-05 07:01:54,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:01:54,277 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:54,277 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:01:54,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-05 07:01:54,477 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:54,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:54,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1040726762, now seen corresponding path program 76 times [2021-06-05 07:01:54,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:54,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787619704] [2021-06-05 07:01:54,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:54,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:54,527 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:54,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:54,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787619704] [2021-06-05 07:01:54,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787619704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:54,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450636438] [2021-06-05 07:01:54,527 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:54,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:01:54,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:54,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:01:54,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:54,662 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:01:54,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450636438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:54,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:54,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-06-05 07:01:54,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473446821] [2021-06-05 07:01:54,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 07:01:54,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:54,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 07:01:54,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-06-05 07:01:54,663 INFO L87 Difference]: Start difference. First operand 13376 states and 47354 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 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 07:01:56,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:56,958 INFO L93 Difference]: Finished difference Result 31957 states and 103754 transitions. [2021-06-05 07:01:56,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2021-06-05 07:01:56,959 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 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 07:01:56,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:57,014 INFO L225 Difference]: With dead ends: 31957 [2021-06-05 07:01:57,014 INFO L226 Difference]: Without dead ends: 31941 [2021-06-05 07:01:57,016 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7670 ImplicationChecksByTransitivity, 1584.8ms TimeCoverageRelationStatistics Valid=3631, Invalid=15551, Unknown=0, NotChecked=0, Total=19182 [2021-06-05 07:01:57,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31941 states. [2021-06-05 07:01:57,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31941 to 12804. [2021-06-05 07:01:57,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12804 states, 12803 states have (on average 3.5590096071233304) internal successors, (45566), 12803 states have internal predecessors, (45566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:57,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12804 states to 12804 states and 45566 transitions. [2021-06-05 07:01:57,410 INFO L78 Accepts]: Start accepts. Automaton has 12804 states and 45566 transitions. Word has length 36 [2021-06-05 07:01:57,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:57,410 INFO L482 AbstractCegarLoop]: Abstraction has 12804 states and 45566 transitions. [2021-06-05 07:01:57,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 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 07:01:57,410 INFO L276 IsEmpty]: Start isEmpty. Operand 12804 states and 45566 transitions. [2021-06-05 07:01:57,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:01:57,429 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:57,429 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:01:57,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 07:01:57,630 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:01:57,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:01:57,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1670020454, now seen corresponding path program 77 times [2021-06-05 07:01:57,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:01:57,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127094295] [2021-06-05 07:01:57,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:01:57,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:01:57,683 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:01:57,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:01:57,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127094295] [2021-06-05 07:01:57,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127094295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:57,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913480471] [2021-06-05 07:01:57,683 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:01:57,709 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 07:01:57,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:01:57,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:01:57,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:01:57,814 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:01:57,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913480471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:01:57,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:01:57,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-05 07:01:57,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574053530] [2021-06-05 07:01:57,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:01:57,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:01:57,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:01:57,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:01:57,815 INFO L87 Difference]: Start difference. First operand 12804 states and 45566 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 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 07:01:59,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:01:59,557 INFO L93 Difference]: Finished difference Result 29035 states and 95366 transitions. [2021-06-05 07:01:59,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-06-05 07:01:59,557 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 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 07:01:59,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:01:59,603 INFO L225 Difference]: With dead ends: 29035 [2021-06-05 07:01:59,603 INFO L226 Difference]: Without dead ends: 28951 [2021-06-05 07:01:59,604 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4298 ImplicationChecksByTransitivity, 1151.7ms TimeCoverageRelationStatistics Valid=2386, Invalid=8956, Unknown=0, NotChecked=0, Total=11342 [2021-06-05 07:01:59,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28951 states. [2021-06-05 07:01:59,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28951 to 12660. [2021-06-05 07:01:59,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12660 states, 12659 states have (on average 3.5663164546962633) internal successors, (45146), 12659 states have internal predecessors, (45146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:01:59,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12660 states to 12660 states and 45146 transitions. [2021-06-05 07:01:59,942 INFO L78 Accepts]: Start accepts. Automaton has 12660 states and 45146 transitions. Word has length 36 [2021-06-05 07:01:59,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:01:59,942 INFO L482 AbstractCegarLoop]: Abstraction has 12660 states and 45146 transitions. [2021-06-05 07:01:59,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 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 07:01:59,942 INFO L276 IsEmpty]: Start isEmpty. Operand 12660 states and 45146 transitions. [2021-06-05 07:01:59,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:01:59,960 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:01:59,960 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:02:00,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 07:02:00,176 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:00,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:00,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1988479988, now seen corresponding path program 78 times [2021-06-05 07:02:00,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:00,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656025784] [2021-06-05 07:02:00,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:00,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:00,226 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:00,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:00,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656025784] [2021-06-05 07:02:00,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656025784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:00,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926233722] [2021-06-05 07:02:00,227 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:00,251 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 07:02:00,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:00,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 07:02:00,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:00,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 07:02:00,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:02:00,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:02:00,401 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:02:00,401 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:21 [2021-06-05 07:02:00,428 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-06-05 07:02:00,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 07:02:00,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:02:00,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:02:00,435 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:02:00,435 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-06-05 07:02:00,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:02:00,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:02:00,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:02:00,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 36 [2021-06-05 07:02:00,487 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:02:00,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:02:00,497 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 07:02:00,497 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:47 [2021-06-05 07:02:00,588 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 07:02:00,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926233722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:00,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:00,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-06-05 07:02:00,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117385733] [2021-06-05 07:02:00,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 07:02:00,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:00,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 07:02:00,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-06-05 07:02:00,589 INFO L87 Difference]: Start difference. First operand 12660 states and 45146 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:04,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:04,229 INFO L93 Difference]: Finished difference Result 27292 states and 89638 transitions. [2021-06-05 07:02:04,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2021-06-05 07:02:04,230 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have 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 07:02:04,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:04,274 INFO L225 Difference]: With dead ends: 27292 [2021-06-05 07:02:04,274 INFO L226 Difference]: Without dead ends: 27101 [2021-06-05 07:02:04,275 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10096 ImplicationChecksByTransitivity, 2620.9ms TimeCoverageRelationStatistics Valid=3156, Invalid=22604, Unknown=0, NotChecked=0, Total=25760 [2021-06-05 07:02:04,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27101 states. [2021-06-05 07:02:04,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27101 to 12693. [2021-06-05 07:02:04,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12693 states, 12692 states have (on average 3.567601638827608) internal successors, (45280), 12692 states have internal predecessors, (45280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:04,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12693 states to 12693 states and 45280 transitions. [2021-06-05 07:02:04,610 INFO L78 Accepts]: Start accepts. Automaton has 12693 states and 45280 transitions. Word has length 36 [2021-06-05 07:02:04,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:04,611 INFO L482 AbstractCegarLoop]: Abstraction has 12693 states and 45280 transitions. [2021-06-05 07:02:04,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:04,611 INFO L276 IsEmpty]: Start isEmpty. Operand 12693 states and 45280 transitions. [2021-06-05 07:02:04,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:02:04,628 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:04,628 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:02:04,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 07:02:04,829 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:04,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:04,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1792794872, now seen corresponding path program 79 times [2021-06-05 07:02:04,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:04,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316933577] [2021-06-05 07:02:04,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:04,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:04,867 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:02:04,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:04,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316933577] [2021-06-05 07:02:04,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316933577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:04,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371470951] [2021-06-05 07:02:04,867 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:04,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:04,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:02:04,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:05,004 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:05,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371470951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:05,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:05,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 07:02:05,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844457577] [2021-06-05 07:02:05,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:02:05,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:05,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:02:05,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:02:05,005 INFO L87 Difference]: Start difference. First operand 12693 states and 45280 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 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 07:02:05,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:05,704 INFO L93 Difference]: Finished difference Result 30802 states and 102946 transitions. [2021-06-05 07:02:05,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 07:02:05,704 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 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 07:02:05,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:05,757 INFO L225 Difference]: With dead ends: 30802 [2021-06-05 07:02:05,757 INFO L226 Difference]: Without dead ends: 30802 [2021-06-05 07:02:05,758 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 348.7ms TimeCoverageRelationStatistics Valid=588, Invalid=1574, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 07:02:05,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30802 states. [2021-06-05 07:02:06,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30802 to 12697. [2021-06-05 07:02:06,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12697 states, 12696 states have (on average 3.5682104599873976) internal successors, (45302), 12696 states have internal predecessors, (45302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:06,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12697 states to 12697 states and 45302 transitions. [2021-06-05 07:02:06,129 INFO L78 Accepts]: Start accepts. Automaton has 12697 states and 45302 transitions. Word has length 36 [2021-06-05 07:02:06,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:06,129 INFO L482 AbstractCegarLoop]: Abstraction has 12697 states and 45302 transitions. [2021-06-05 07:02:06,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 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 07:02:06,129 INFO L276 IsEmpty]: Start isEmpty. Operand 12697 states and 45302 transitions. [2021-06-05 07:02:06,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:02:06,146 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:06,147 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:02:06,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-05 07:02:06,347 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:06,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:06,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1230140076, now seen corresponding path program 80 times [2021-06-05 07:02:06,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:06,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077804718] [2021-06-05 07:02:06,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:06,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:06,392 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:06,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:06,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077804718] [2021-06-05 07:02:06,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077804718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:06,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285808920] [2021-06-05 07:02:06,392 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:06,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:02:06,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:06,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:02:06,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:06,589 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:02:06,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285808920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:06,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:06,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 07:02:06,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329928925] [2021-06-05 07:02:06,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:02:06,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:06,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:02:06,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:02:06,589 INFO L87 Difference]: Start difference. First operand 12697 states and 45302 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 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 07:02:09,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:09,385 INFO L93 Difference]: Finished difference Result 33049 states and 107981 transitions. [2021-06-05 07:02:09,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2021-06-05 07:02:09,385 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 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 07:02:09,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:09,446 INFO L225 Difference]: With dead ends: 33049 [2021-06-05 07:02:09,446 INFO L226 Difference]: Without dead ends: 32977 [2021-06-05 07:02:09,449 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11512 ImplicationChecksByTransitivity, 1965.4ms TimeCoverageRelationStatistics Valid=4716, Invalid=23006, Unknown=0, NotChecked=0, Total=27722 [2021-06-05 07:02:09,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32977 states. [2021-06-05 07:02:09,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32977 to 12738. [2021-06-05 07:02:09,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12738 states, 12737 states have (on average 3.5727408337913165) internal successors, (45506), 12737 states have internal predecessors, (45506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:09,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12738 states to 12738 states and 45506 transitions. [2021-06-05 07:02:09,831 INFO L78 Accepts]: Start accepts. Automaton has 12738 states and 45506 transitions. Word has length 36 [2021-06-05 07:02:09,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:09,831 INFO L482 AbstractCegarLoop]: Abstraction has 12738 states and 45506 transitions. [2021-06-05 07:02:09,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 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 07:02:09,831 INFO L276 IsEmpty]: Start isEmpty. Operand 12738 states and 45506 transitions. [2021-06-05 07:02:09,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:02:09,848 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:09,848 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:02:10,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-06-05 07:02:10,049 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:10,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:10,049 INFO L82 PathProgramCache]: Analyzing trace with hash -2017838672, now seen corresponding path program 81 times [2021-06-05 07:02:10,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:10,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087283332] [2021-06-05 07:02:10,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:10,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:10,120 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:10,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:10,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087283332] [2021-06-05 07:02:10,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087283332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:10,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633275648] [2021-06-05 07:02:10,120 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:10,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 07:02:10,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:10,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:02:10,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:10,236 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:10,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633275648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:10,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:10,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-06-05 07:02:10,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211953698] [2021-06-05 07:02:10,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:02:10,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:10,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:02:10,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:02:10,237 INFO L87 Difference]: Start difference. First operand 12738 states and 45506 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 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 07:02:11,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:11,537 INFO L93 Difference]: Finished difference Result 28529 states and 93962 transitions. [2021-06-05 07:02:11,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 07:02:11,537 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 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 36 [2021-06-05 07:02:11,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:11,586 INFO L225 Difference]: With dead ends: 28529 [2021-06-05 07:02:11,586 INFO L226 Difference]: Without dead ends: 28385 [2021-06-05 07:02:11,587 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2641 ImplicationChecksByTransitivity, 829.8ms TimeCoverageRelationStatistics Valid=1478, Invalid=6004, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 07:02:11,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28385 states. [2021-06-05 07:02:11,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28385 to 12796. [2021-06-05 07:02:11,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12796 states, 12795 states have (on average 3.569753810082063) internal successors, (45675), 12795 states have internal predecessors, (45675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:11,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12796 states to 12796 states and 45675 transitions. [2021-06-05 07:02:11,939 INFO L78 Accepts]: Start accepts. Automaton has 12796 states and 45675 transitions. Word has length 36 [2021-06-05 07:02:11,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:11,939 INFO L482 AbstractCegarLoop]: Abstraction has 12796 states and 45675 transitions. [2021-06-05 07:02:11,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 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 07:02:11,939 INFO L276 IsEmpty]: Start isEmpty. Operand 12796 states and 45675 transitions. [2021-06-05 07:02:11,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:02:11,957 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:11,957 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:02:12,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-05 07:02:12,157 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:12,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:12,158 INFO L82 PathProgramCache]: Analyzing trace with hash -545537740, now seen corresponding path program 82 times [2021-06-05 07:02:12,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:12,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660567317] [2021-06-05 07:02:12,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:12,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:12,212 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:12,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:12,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660567317] [2021-06-05 07:02:12,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660567317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:12,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812221216] [2021-06-05 07:02:12,212 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:12,234 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:02:12,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:12,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:02:12,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:12,329 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:02:12,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812221216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:12,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:12,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-06-05 07:02:12,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916317409] [2021-06-05 07:02:12,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:02:12,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:12,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:02:12,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:02:12,330 INFO L87 Difference]: Start difference. First operand 12796 states and 45675 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 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 07:02:14,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:14,130 INFO L93 Difference]: Finished difference Result 30495 states and 99403 transitions. [2021-06-05 07:02:14,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-06-05 07:02:14,130 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 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 07:02:14,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:14,255 INFO L225 Difference]: With dead ends: 30495 [2021-06-05 07:02:14,255 INFO L226 Difference]: Without dead ends: 30483 [2021-06-05 07:02:14,255 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5685 ImplicationChecksByTransitivity, 1145.6ms TimeCoverageRelationStatistics Valid=2727, Invalid=11315, Unknown=0, NotChecked=0, Total=14042 [2021-06-05 07:02:14,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30483 states. [2021-06-05 07:02:14,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30483 to 11108. [2021-06-05 07:02:14,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11108 states, 11107 states have (on average 3.466822724408031) internal successors, (38506), 11107 states have internal predecessors, (38506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:14,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11108 states to 11108 states and 38506 transitions. [2021-06-05 07:02:14,541 INFO L78 Accepts]: Start accepts. Automaton has 11108 states and 38506 transitions. Word has length 36 [2021-06-05 07:02:14,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:14,541 INFO L482 AbstractCegarLoop]: Abstraction has 11108 states and 38506 transitions. [2021-06-05 07:02:14,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 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 07:02:14,541 INFO L276 IsEmpty]: Start isEmpty. Operand 11108 states and 38506 transitions. [2021-06-05 07:02:14,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:02:14,555 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:14,555 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:02:14,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:14,756 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:14,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:14,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1920078252, now seen corresponding path program 83 times [2021-06-05 07:02:14,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:14,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3155318] [2021-06-05 07:02:14,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:14,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:14,808 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:14,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:14,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3155318] [2021-06-05 07:02:14,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3155318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:14,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067432897] [2021-06-05 07:02:14,808 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:14,833 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 07:02:14,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:14,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:02:14,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:14,954 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:02:14,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067432897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:14,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:14,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-06-05 07:02:14,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832399902] [2021-06-05 07:02:14,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 07:02:14,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:14,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 07:02:14,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-06-05 07:02:14,955 INFO L87 Difference]: Start difference. First operand 11108 states and 38506 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:16,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:16,557 INFO L93 Difference]: Finished difference Result 23782 states and 78083 transitions. [2021-06-05 07:02:16,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-06-05 07:02:16,558 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have 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 07:02:16,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:16,596 INFO L225 Difference]: With dead ends: 23782 [2021-06-05 07:02:16,597 INFO L226 Difference]: Without dead ends: 23782 [2021-06-05 07:02:16,598 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4543 ImplicationChecksByTransitivity, 1121.2ms TimeCoverageRelationStatistics Valid=2343, Invalid=8999, Unknown=0, NotChecked=0, Total=11342 [2021-06-05 07:02:16,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23782 states. [2021-06-05 07:02:16,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23782 to 11414. [2021-06-05 07:02:16,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11414 states, 11413 states have (on average 3.453517918163498) internal successors, (39415), 11413 states have internal predecessors, (39415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:16,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11414 states to 11414 states and 39415 transitions. [2021-06-05 07:02:16,860 INFO L78 Accepts]: Start accepts. Automaton has 11414 states and 39415 transitions. Word has length 36 [2021-06-05 07:02:16,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:16,860 INFO L482 AbstractCegarLoop]: Abstraction has 11414 states and 39415 transitions. [2021-06-05 07:02:16,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:16,860 INFO L276 IsEmpty]: Start isEmpty. Operand 11414 states and 39415 transitions. [2021-06-05 07:02:16,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:02:16,875 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:16,875 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:02:17,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:17,075 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:17,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:17,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1278156332, now seen corresponding path program 84 times [2021-06-05 07:02:17,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:17,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815642818] [2021-06-05 07:02:17,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:17,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:17,130 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:17,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:17,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815642818] [2021-06-05 07:02:17,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815642818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:17,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431324993] [2021-06-05 07:02:17,130 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:17,154 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 07:02:17,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:17,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 07:02:17,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:17,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 07:02:17,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:02:17,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:02:17,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:02:17,308 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:21 [2021-06-05 07:02:17,335 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-06-05 07:02:17,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 07:02:17,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:02:17,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:02:17,342 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:02:17,342 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-06-05 07:02:17,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:02:17,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:02:17,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:02:17,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 36 [2021-06-05 07:02:17,393 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:02:17,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:02:17,404 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 07:02:17,404 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:47 [2021-06-05 07:02:17,491 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 07:02:17,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431324993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:17,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:17,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-06-05 07:02:17,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074879991] [2021-06-05 07:02:17,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 07:02:17,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:17,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 07:02:17,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-06-05 07:02:17,492 INFO L87 Difference]: Start difference. First operand 11414 states and 39415 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:21,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:21,914 INFO L93 Difference]: Finished difference Result 23675 states and 76434 transitions. [2021-06-05 07:02:21,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2021-06-05 07:02:21,914 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have 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 07:02:21,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:21,952 INFO L225 Difference]: With dead ends: 23675 [2021-06-05 07:02:21,952 INFO L226 Difference]: Without dead ends: 23445 [2021-06-05 07:02:21,955 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12718 ImplicationChecksByTransitivity, 3149.3ms TimeCoverageRelationStatistics Valid=3502, Invalid=29078, Unknown=0, NotChecked=0, Total=32580 [2021-06-05 07:02:21,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23445 states. [2021-06-05 07:02:22,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23445 to 11648. [2021-06-05 07:02:22,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11648 states, 11647 states have (on average 3.4537649180046364) internal successors, (40226), 11647 states have internal predecessors, (40226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:22,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11648 states to 11648 states and 40226 transitions. [2021-06-05 07:02:22,267 INFO L78 Accepts]: Start accepts. Automaton has 11648 states and 40226 transitions. Word has length 36 [2021-06-05 07:02:22,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:22,267 INFO L482 AbstractCegarLoop]: Abstraction has 11648 states and 40226 transitions. [2021-06-05 07:02:22,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:22,267 INFO L276 IsEmpty]: Start isEmpty. Operand 11648 states and 40226 transitions. [2021-06-05 07:02:22,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:02:22,282 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:22,282 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:02:22,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:22,484 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:22,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:22,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1851612882, now seen corresponding path program 85 times [2021-06-05 07:02:22,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:22,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658470045] [2021-06-05 07:02:22,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:22,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:22,528 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:02:22,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:22,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658470045] [2021-06-05 07:02:22,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658470045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:22,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800096382] [2021-06-05 07:02:22,529 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:22,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:22,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:02:22,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:22,664 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 07:02:22,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800096382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:22,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:22,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 07:02:22,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826648603] [2021-06-05 07:02:22,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:02:22,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:22,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:02:22,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:02:22,665 INFO L87 Difference]: Start difference. First operand 11648 states and 40226 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 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 07:02:23,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:23,744 INFO L93 Difference]: Finished difference Result 21100 states and 70299 transitions. [2021-06-05 07:02:23,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-05 07:02:23,745 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 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 07:02:23,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:23,780 INFO L225 Difference]: With dead ends: 21100 [2021-06-05 07:02:23,780 INFO L226 Difference]: Without dead ends: 21088 [2021-06-05 07:02:23,781 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2074 ImplicationChecksByTransitivity, 675.7ms TimeCoverageRelationStatistics Valid=1148, Invalid=4858, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 07:02:23,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21088 states. [2021-06-05 07:02:23,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21088 to 11913. [2021-06-05 07:02:24,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11913 states, 11912 states have (on average 3.4548354600402953) internal successors, (41154), 11912 states have internal predecessors, (41154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:24,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11913 states to 11913 states and 41154 transitions. [2021-06-05 07:02:24,033 INFO L78 Accepts]: Start accepts. Automaton has 11913 states and 41154 transitions. Word has length 36 [2021-06-05 07:02:24,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:24,033 INFO L482 AbstractCegarLoop]: Abstraction has 11913 states and 41154 transitions. [2021-06-05 07:02:24,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 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 07:02:24,033 INFO L276 IsEmpty]: Start isEmpty. Operand 11913 states and 41154 transitions. [2021-06-05 07:02:24,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:02:24,048 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:24,048 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:24,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:24,249 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:24,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:24,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1819802944, now seen corresponding path program 25 times [2021-06-05 07:02:24,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:24,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519826446] [2021-06-05 07:02:24,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:24,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:24,288 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 07:02:24,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:24,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519826446] [2021-06-05 07:02:24,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519826446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:24,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842928047] [2021-06-05 07:02:24,288 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:24,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:24,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:02:24,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:24,458 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:24,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842928047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:24,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:24,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-06-05 07:02:24,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246507920] [2021-06-05 07:02:24,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:02:24,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:24,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:02:24,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:02:24,459 INFO L87 Difference]: Start difference. First operand 11913 states and 41154 transitions. Second operand has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 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 07:02:25,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:25,446 INFO L93 Difference]: Finished difference Result 29397 states and 97752 transitions. [2021-06-05 07:02:25,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 07:02:25,447 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 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 07:02:25,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:25,499 INFO L225 Difference]: With dead ends: 29397 [2021-06-05 07:02:25,500 INFO L226 Difference]: Without dead ends: 29397 [2021-06-05 07:02:25,500 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 581.7ms TimeCoverageRelationStatistics Valid=957, Invalid=2583, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 07:02:25,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29397 states. [2021-06-05 07:02:25,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29397 to 12618. [2021-06-05 07:02:25,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12618 states, 12617 states have (on average 3.513672029801062) internal successors, (44332), 12617 states have internal predecessors, (44332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:25,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12618 states to 12618 states and 44332 transitions. [2021-06-05 07:02:25,885 INFO L78 Accepts]: Start accepts. Automaton has 12618 states and 44332 transitions. Word has length 36 [2021-06-05 07:02:25,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:25,886 INFO L482 AbstractCegarLoop]: Abstraction has 12618 states and 44332 transitions. [2021-06-05 07:02:25,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 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 07:02:25,886 INFO L276 IsEmpty]: Start isEmpty. Operand 12618 states and 44332 transitions. [2021-06-05 07:02:25,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:02:25,901 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:25,901 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:26,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-06-05 07:02:26,116 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:26,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:26,117 INFO L82 PathProgramCache]: Analyzing trace with hash 512328654, now seen corresponding path program 26 times [2021-06-05 07:02:26,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:26,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542490008] [2021-06-05 07:02:26,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:26,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:26,153 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:02:26,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:26,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542490008] [2021-06-05 07:02:26,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542490008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:26,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40339906] [2021-06-05 07:02:26,153 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:26,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:02:26,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:26,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:02:26,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:26,294 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:26,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40339906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:26,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:26,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 18 [2021-06-05 07:02:26,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793559691] [2021-06-05 07:02:26,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:02:26,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:26,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:02:26,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:02:26,295 INFO L87 Difference]: Start difference. First operand 12618 states and 44332 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 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 07:02:27,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:27,177 INFO L93 Difference]: Finished difference Result 27598 states and 91849 transitions. [2021-06-05 07:02:27,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 07:02:27,177 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 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 36 [2021-06-05 07:02:27,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:27,226 INFO L225 Difference]: With dead ends: 27598 [2021-06-05 07:02:27,226 INFO L226 Difference]: Without dead ends: 27598 [2021-06-05 07:02:27,227 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 937 ImplicationChecksByTransitivity, 517.8ms TimeCoverageRelationStatistics Valid=833, Invalid=2359, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 07:02:27,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27598 states. [2021-06-05 07:02:27,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27598 to 12630. [2021-06-05 07:02:27,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12630 states, 12629 states have (on average 3.5136590387204056) internal successors, (44374), 12629 states have internal predecessors, (44374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:27,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12630 states to 12630 states and 44374 transitions. [2021-06-05 07:02:27,555 INFO L78 Accepts]: Start accepts. Automaton has 12630 states and 44374 transitions. Word has length 36 [2021-06-05 07:02:27,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:27,555 INFO L482 AbstractCegarLoop]: Abstraction has 12630 states and 44374 transitions. [2021-06-05 07:02:27,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 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 07:02:27,556 INFO L276 IsEmpty]: Start isEmpty. Operand 12630 states and 44374 transitions. [2021-06-05 07:02:27,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:02:27,571 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:27,571 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:27,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-05 07:02:27,772 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:27,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:27,772 INFO L82 PathProgramCache]: Analyzing trace with hash -2051604804, now seen corresponding path program 27 times [2021-06-05 07:02:27,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:27,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372218737] [2021-06-05 07:02:27,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:27,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:27,809 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:02:27,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:27,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372218737] [2021-06-05 07:02:27,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372218737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:27,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134488366] [2021-06-05 07:02:27,810 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:27,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 07:02:27,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:27,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:02:27,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:27,947 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:27,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134488366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:27,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:27,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 18 [2021-06-05 07:02:27,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918519987] [2021-06-05 07:02:27,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:02:27,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:27,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:02:27,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:02:27,948 INFO L87 Difference]: Start difference. First operand 12630 states and 44374 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 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 07:02:28,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:28,827 INFO L93 Difference]: Finished difference Result 27112 states and 90425 transitions. [2021-06-05 07:02:28,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 07:02:28,828 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 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 36 [2021-06-05 07:02:28,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:28,877 INFO L225 Difference]: With dead ends: 27112 [2021-06-05 07:02:28,878 INFO L226 Difference]: Without dead ends: 27108 [2021-06-05 07:02:28,878 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 455.9ms TimeCoverageRelationStatistics Valid=708, Invalid=2048, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 07:02:28,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27108 states. [2021-06-05 07:02:29,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27108 to 12826. [2021-06-05 07:02:29,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12826 states, 12825 states have (on average 3.504093567251462) internal successors, (44940), 12825 states have internal predecessors, (44940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:29,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12826 states to 12826 states and 44940 transitions. [2021-06-05 07:02:29,258 INFO L78 Accepts]: Start accepts. Automaton has 12826 states and 44940 transitions. Word has length 36 [2021-06-05 07:02:29,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:29,258 INFO L482 AbstractCegarLoop]: Abstraction has 12826 states and 44940 transitions. [2021-06-05 07:02:29,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 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 07:02:29,258 INFO L276 IsEmpty]: Start isEmpty. Operand 12826 states and 44940 transitions. [2021-06-05 07:02:29,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:02:29,276 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:29,276 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:29,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 07:02:29,477 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:29,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:29,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1246962008, now seen corresponding path program 28 times [2021-06-05 07:02:29,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:29,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901601637] [2021-06-05 07:02:29,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:29,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:29,523 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:02:29,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:29,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901601637] [2021-06-05 07:02:29,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901601637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:29,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797097278] [2021-06-05 07:02:29,523 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:29,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:02:29,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:29,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:02:29,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:29,656 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:29,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797097278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:29,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:29,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 18 [2021-06-05 07:02:29,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236337808] [2021-06-05 07:02:29,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:02:29,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:29,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:02:29,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:02:29,657 INFO L87 Difference]: Start difference. First operand 12826 states and 44940 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 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 07:02:30,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:30,592 INFO L93 Difference]: Finished difference Result 26778 states and 89284 transitions. [2021-06-05 07:02:30,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 07:02:30,593 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 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 36 [2021-06-05 07:02:30,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:30,639 INFO L225 Difference]: With dead ends: 26778 [2021-06-05 07:02:30,639 INFO L226 Difference]: Without dead ends: 26778 [2021-06-05 07:02:30,639 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1207 ImplicationChecksByTransitivity, 538.8ms TimeCoverageRelationStatistics Valid=956, Invalid=2704, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 07:02:30,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26778 states. [2021-06-05 07:02:30,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26778 to 12913. [2021-06-05 07:02:30,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12913 states, 12912 states have (on average 3.5164188351920695) internal successors, (45404), 12912 states have internal predecessors, (45404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:30,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12913 states to 12913 states and 45404 transitions. [2021-06-05 07:02:30,955 INFO L78 Accepts]: Start accepts. Automaton has 12913 states and 45404 transitions. Word has length 36 [2021-06-05 07:02:30,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:30,955 INFO L482 AbstractCegarLoop]: Abstraction has 12913 states and 45404 transitions. [2021-06-05 07:02:30,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 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 07:02:30,956 INFO L276 IsEmpty]: Start isEmpty. Operand 12913 states and 45404 transitions. [2021-06-05 07:02:30,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:02:30,972 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:30,972 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:31,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-05 07:02:31,173 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:31,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:31,173 INFO L82 PathProgramCache]: Analyzing trace with hash 680135048, now seen corresponding path program 29 times [2021-06-05 07:02:31,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:31,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398179914] [2021-06-05 07:02:31,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:31,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:31,216 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:02:31,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:31,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398179914] [2021-06-05 07:02:31,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398179914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:31,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639409989] [2021-06-05 07:02:31,216 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:31,240 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 07:02:31,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:31,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:02:31,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:31,388 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:02:31,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639409989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:31,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:31,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 07:02:31,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002393082] [2021-06-05 07:02:31,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:02:31,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:31,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:02:31,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:02:31,389 INFO L87 Difference]: Start difference. First operand 12913 states and 45404 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 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 07:02:35,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:35,355 INFO L93 Difference]: Finished difference Result 28407 states and 94171 transitions. [2021-06-05 07:02:35,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2021-06-05 07:02:35,355 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 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 07:02:35,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:35,405 INFO L225 Difference]: With dead ends: 28407 [2021-06-05 07:02:35,405 INFO L226 Difference]: Without dead ends: 28387 [2021-06-05 07:02:35,409 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18300 ImplicationChecksByTransitivity, 3004.1ms TimeCoverageRelationStatistics Valid=7298, Invalid=36174, Unknown=0, NotChecked=0, Total=43472 [2021-06-05 07:02:35,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28387 states. [2021-06-05 07:02:35,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28387 to 13021. [2021-06-05 07:02:35,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13021 states, 13020 states have (on average 3.526804915514593) internal successors, (45919), 13020 states have internal predecessors, (45919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:35,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13021 states to 13021 states and 45919 transitions. [2021-06-05 07:02:35,756 INFO L78 Accepts]: Start accepts. Automaton has 13021 states and 45919 transitions. Word has length 36 [2021-06-05 07:02:35,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:35,756 INFO L482 AbstractCegarLoop]: Abstraction has 13021 states and 45919 transitions. [2021-06-05 07:02:35,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 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 07:02:35,756 INFO L276 IsEmpty]: Start isEmpty. Operand 13021 states and 45919 transitions. [2021-06-05 07:02:35,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:02:35,773 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:35,773 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:02:35,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:35,974 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:35,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:35,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1847708024, now seen corresponding path program 30 times [2021-06-05 07:02:35,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:35,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382621452] [2021-06-05 07:02:35,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:35,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:36,027 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:36,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:36,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382621452] [2021-06-05 07:02:36,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382621452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:36,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561130019] [2021-06-05 07:02:36,028 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:36,051 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 07:02:36,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:36,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 07:02:36,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:36,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 07:02:36,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:02:36,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:02:36,201 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:02:36,201 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:21 [2021-06-05 07:02:36,234 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-06-05 07:02:36,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 07:02:36,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:02:36,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:02:36,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:02:36,242 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-06-05 07:02:36,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:02:36,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:02:36,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:02:36,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 36 [2021-06-05 07:02:36,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:02:36,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:02:36,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 07:02:36,303 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:47 [2021-06-05 07:02:36,384 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 07:02:36,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561130019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:36,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:36,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-06-05 07:02:36,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880984416] [2021-06-05 07:02:36,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 07:02:36,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:36,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 07:02:36,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-06-05 07:02:36,385 INFO L87 Difference]: Start difference. First operand 13021 states and 45919 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:40,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:40,201 INFO L93 Difference]: Finished difference Result 25162 states and 83066 transitions. [2021-06-05 07:02:40,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2021-06-05 07:02:40,202 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have 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 07:02:40,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:40,244 INFO L225 Difference]: With dead ends: 25162 [2021-06-05 07:02:40,245 INFO L226 Difference]: Without dead ends: 24983 [2021-06-05 07:02:40,247 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13764 ImplicationChecksByTransitivity, 2945.8ms TimeCoverageRelationStatistics Valid=4792, Invalid=29248, Unknown=0, NotChecked=0, Total=34040 [2021-06-05 07:02:40,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24983 states. [2021-06-05 07:02:40,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24983 to 13428. [2021-06-05 07:02:40,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13428 states, 13427 states have (on average 3.5044313696283607) internal successors, (47054), 13427 states have internal predecessors, (47054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:40,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13428 states to 13428 states and 47054 transitions. [2021-06-05 07:02:40,561 INFO L78 Accepts]: Start accepts. Automaton has 13428 states and 47054 transitions. Word has length 36 [2021-06-05 07:02:40,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:40,561 INFO L482 AbstractCegarLoop]: Abstraction has 13428 states and 47054 transitions. [2021-06-05 07:02:40,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:40,561 INFO L276 IsEmpty]: Start isEmpty. Operand 13428 states and 47054 transitions. [2021-06-05 07:02:40,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:02:40,579 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:40,579 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:02:40,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-05 07:02:40,779 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:40,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:40,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1284231232, now seen corresponding path program 86 times [2021-06-05 07:02:40,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:40,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255383] [2021-06-05 07:02:40,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:40,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:40,828 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:02:40,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:40,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255383] [2021-06-05 07:02:40,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:40,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665311461] [2021-06-05 07:02:40,829 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:40,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:02:40,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:40,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:02:40,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:41,025 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:02:41,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665311461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:41,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:41,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 07:02:41,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674057854] [2021-06-05 07:02:41,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:02:41,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:41,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:02:41,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:02:41,025 INFO L87 Difference]: Start difference. First operand 13428 states and 47054 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 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 07:02:41,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:41,730 INFO L93 Difference]: Finished difference Result 24409 states and 81988 transitions. [2021-06-05 07:02:41,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 07:02:41,730 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 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 07:02:41,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:41,768 INFO L225 Difference]: With dead ends: 24409 [2021-06-05 07:02:41,769 INFO L226 Difference]: Without dead ends: 24409 [2021-06-05 07:02:41,769 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 382.5ms TimeCoverageRelationStatistics Valid=614, Invalid=1836, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 07:02:41,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24409 states. [2021-06-05 07:02:42,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24409 to 13273. [2021-06-05 07:02:42,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13273 states, 13272 states have (on average 3.4954792043399636) internal successors, (46392), 13272 states have internal predecessors, (46392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:42,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13273 states to 13273 states and 46392 transitions. [2021-06-05 07:02:42,082 INFO L78 Accepts]: Start accepts. Automaton has 13273 states and 46392 transitions. Word has length 36 [2021-06-05 07:02:42,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:42,082 INFO L482 AbstractCegarLoop]: Abstraction has 13273 states and 46392 transitions. [2021-06-05 07:02:42,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 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 07:02:42,082 INFO L276 IsEmpty]: Start isEmpty. Operand 13273 states and 46392 transitions. [2021-06-05 07:02:42,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:02:42,099 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:42,099 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:02:42,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:42,299 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:42,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:42,300 INFO L82 PathProgramCache]: Analyzing trace with hash -2050547776, now seen corresponding path program 87 times [2021-06-05 07:02:42,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:42,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314726185] [2021-06-05 07:02:42,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:42,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:42,342 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:02:42,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:42,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314726185] [2021-06-05 07:02:42,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314726185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:42,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107840961] [2021-06-05 07:02:42,343 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:42,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 07:02:42,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:42,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:02:42,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:42,464 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 07:02:42,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107840961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:42,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:42,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-05 07:02:42,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342554926] [2021-06-05 07:02:42,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:02:42,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:42,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:02:42,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:02:42,464 INFO L87 Difference]: Start difference. First operand 13273 states and 46392 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 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 07:02:42,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:42,905 INFO L93 Difference]: Finished difference Result 23775 states and 80054 transitions. [2021-06-05 07:02:42,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 07:02:42,905 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 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 36 [2021-06-05 07:02:42,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:42,942 INFO L225 Difference]: With dead ends: 23775 [2021-06-05 07:02:42,942 INFO L226 Difference]: Without dead ends: 23775 [2021-06-05 07:02:42,942 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 220.0ms TimeCoverageRelationStatistics Valid=287, Invalid=835, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 07:02:42,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23775 states. [2021-06-05 07:02:43,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23775 to 13214. [2021-06-05 07:02:43,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13214 states, 13213 states have (on average 3.4921668054189055) internal successors, (46142), 13213 states have internal predecessors, (46142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:43,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13214 states to 13214 states and 46142 transitions. [2021-06-05 07:02:43,243 INFO L78 Accepts]: Start accepts. Automaton has 13214 states and 46142 transitions. Word has length 36 [2021-06-05 07:02:43,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:43,243 INFO L482 AbstractCegarLoop]: Abstraction has 13214 states and 46142 transitions. [2021-06-05 07:02:43,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 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 07:02:43,244 INFO L276 IsEmpty]: Start isEmpty. Operand 13214 states and 46142 transitions. [2021-06-05 07:02:43,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:02:43,261 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:43,261 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:02:43,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-05 07:02:43,462 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:43,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:43,462 INFO L82 PathProgramCache]: Analyzing trace with hash 281583822, now seen corresponding path program 88 times [2021-06-05 07:02:43,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:43,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207526831] [2021-06-05 07:02:43,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:43,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:43,513 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:02:43,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:43,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207526831] [2021-06-05 07:02:43,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207526831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:43,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112631864] [2021-06-05 07:02:43,513 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:43,535 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:02:43,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:43,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:02:43,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:43,624 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 07:02:43,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112631864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:43,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:43,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2021-06-05 07:02:43,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490735370] [2021-06-05 07:02:43,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:02:43,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:43,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:02:43,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:02:43,625 INFO L87 Difference]: Start difference. First operand 13214 states and 46142 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 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 07:02:44,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:44,093 INFO L93 Difference]: Finished difference Result 23327 states and 78114 transitions. [2021-06-05 07:02:44,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 07:02:44,093 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 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 36 [2021-06-05 07:02:44,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:44,128 INFO L225 Difference]: With dead ends: 23327 [2021-06-05 07:02:44,128 INFO L226 Difference]: Without dead ends: 23327 [2021-06-05 07:02:44,128 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 276.1ms TimeCoverageRelationStatistics Valid=312, Invalid=878, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 07:02:44,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23327 states. [2021-06-05 07:02:44,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23327 to 13240. [2021-06-05 07:02:44,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13240 states, 13239 states have (on average 3.4912757761160207) internal successors, (46221), 13239 states have internal predecessors, (46221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:44,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13240 states to 13240 states and 46221 transitions. [2021-06-05 07:02:44,425 INFO L78 Accepts]: Start accepts. Automaton has 13240 states and 46221 transitions. Word has length 36 [2021-06-05 07:02:44,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:44,425 INFO L482 AbstractCegarLoop]: Abstraction has 13240 states and 46221 transitions. [2021-06-05 07:02:44,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 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 07:02:44,425 INFO L276 IsEmpty]: Start isEmpty. Operand 13240 states and 46221 transitions. [2021-06-05 07:02:44,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:02:44,445 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:44,445 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:02:44,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-06-05 07:02:44,646 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:44,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:44,646 INFO L82 PathProgramCache]: Analyzing trace with hash 2012617660, now seen corresponding path program 89 times [2021-06-05 07:02:44,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:44,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934168265] [2021-06-05 07:02:44,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:44,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:44,688 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:02:44,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:44,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934168265] [2021-06-05 07:02:44,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934168265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:44,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714663542] [2021-06-05 07:02:44,688 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:44,716 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 07:02:44,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:44,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:02:44,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:44,812 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 07:02:44,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714663542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:44,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:44,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-05 07:02:44,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460340185] [2021-06-05 07:02:44,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:02:44,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:44,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:02:44,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:02:44,813 INFO L87 Difference]: Start difference. First operand 13240 states and 46221 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 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 07:02:46,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:46,155 INFO L93 Difference]: Finished difference Result 26376 states and 86731 transitions. [2021-06-05 07:02:46,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-06-05 07:02:46,156 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 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 07:02:46,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:46,200 INFO L225 Difference]: With dead ends: 26376 [2021-06-05 07:02:46,201 INFO L226 Difference]: Without dead ends: 26364 [2021-06-05 07:02:46,201 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2864 ImplicationChecksByTransitivity, 826.8ms TimeCoverageRelationStatistics Valid=1623, Invalid=6387, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 07:02:46,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26364 states. [2021-06-05 07:02:46,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26364 to 13310. [2021-06-05 07:02:46,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13310 states, 13309 states have (on average 3.4776467052370577) internal successors, (46284), 13309 states have internal predecessors, (46284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:46,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13310 states to 13310 states and 46284 transitions. [2021-06-05 07:02:46,558 INFO L78 Accepts]: Start accepts. Automaton has 13310 states and 46284 transitions. Word has length 36 [2021-06-05 07:02:46,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:46,558 INFO L482 AbstractCegarLoop]: Abstraction has 13310 states and 46284 transitions. [2021-06-05 07:02:46,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 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 07:02:46,558 INFO L276 IsEmpty]: Start isEmpty. Operand 13310 states and 46284 transitions. [2021-06-05 07:02:46,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:02:46,576 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:46,576 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:02:46,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:46,776 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:46,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:46,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1239534524, now seen corresponding path program 90 times [2021-06-05 07:02:46,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:46,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363552584] [2021-06-05 07:02:46,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:46,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:46,820 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:02:46,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:46,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363552584] [2021-06-05 07:02:46,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363552584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:46,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170174268] [2021-06-05 07:02:46,820 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:46,848 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 07:02:46,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:46,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:02:46,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:46,919 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 07:02:46,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170174268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:46,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:46,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-06-05 07:02:46,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789925657] [2021-06-05 07:02:46,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:02:46,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:46,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:02:46,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:02:46,920 INFO L87 Difference]: Start difference. First operand 13310 states and 46284 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 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 07:02:47,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:47,735 INFO L93 Difference]: Finished difference Result 26781 states and 88963 transitions. [2021-06-05 07:02:47,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 07:02:47,736 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 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 36 [2021-06-05 07:02:47,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:47,779 INFO L225 Difference]: With dead ends: 26781 [2021-06-05 07:02:47,779 INFO L226 Difference]: Without dead ends: 26737 [2021-06-05 07:02:47,780 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 494.2ms TimeCoverageRelationStatistics Valid=802, Invalid=2858, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 07:02:47,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26737 states. [2021-06-05 07:02:48,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26737 to 13708. [2021-06-05 07:02:48,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13708 states, 13707 states have (on average 3.4510104326256656) internal successors, (47303), 13707 states have internal predecessors, (47303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:48,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13708 states to 13708 states and 47303 transitions. [2021-06-05 07:02:48,105 INFO L78 Accepts]: Start accepts. Automaton has 13708 states and 47303 transitions. Word has length 36 [2021-06-05 07:02:48,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:48,105 INFO L482 AbstractCegarLoop]: Abstraction has 13708 states and 47303 transitions. [2021-06-05 07:02:48,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 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 07:02:48,105 INFO L276 IsEmpty]: Start isEmpty. Operand 13708 states and 47303 transitions. [2021-06-05 07:02:48,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:02:48,123 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:48,123 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:02:48,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:48,324 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:48,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:48,324 INFO L82 PathProgramCache]: Analyzing trace with hash 790366380, now seen corresponding path program 91 times [2021-06-05 07:02:48,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:48,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407266119] [2021-06-05 07:02:48,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:48,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:48,373 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:02:48,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:48,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407266119] [2021-06-05 07:02:48,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407266119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:48,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220807672] [2021-06-05 07:02:48,374 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:48,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:48,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:02:48,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:48,476 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:02:48,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220807672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:48,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:48,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-06-05 07:02:48,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455658740] [2021-06-05 07:02:48,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:02:48,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:48,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:02:48,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:02:48,477 INFO L87 Difference]: Start difference. First operand 13708 states and 47303 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 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 07:02:49,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:49,106 INFO L93 Difference]: Finished difference Result 26715 states and 87686 transitions. [2021-06-05 07:02:49,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 07:02:49,106 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 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 36 [2021-06-05 07:02:49,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:49,153 INFO L225 Difference]: With dead ends: 26715 [2021-06-05 07:02:49,153 INFO L226 Difference]: Without dead ends: 26715 [2021-06-05 07:02:49,153 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 808 ImplicationChecksByTransitivity, 357.7ms TimeCoverageRelationStatistics Valid=654, Invalid=1796, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 07:02:49,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26715 states. [2021-06-05 07:02:49,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26715 to 14801. [2021-06-05 07:02:49,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14801 states, 14800 states have (on average 3.4525675675675678) internal successors, (51098), 14800 states have internal predecessors, (51098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:49,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14801 states to 14801 states and 51098 transitions. [2021-06-05 07:02:49,497 INFO L78 Accepts]: Start accepts. Automaton has 14801 states and 51098 transitions. Word has length 36 [2021-06-05 07:02:49,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:49,497 INFO L482 AbstractCegarLoop]: Abstraction has 14801 states and 51098 transitions. [2021-06-05 07:02:49,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 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 07:02:49,498 INFO L276 IsEmpty]: Start isEmpty. Operand 14801 states and 51098 transitions. [2021-06-05 07:02:49,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:02:49,518 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:49,518 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:02:49,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-05 07:02:49,722 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:49,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:49,723 INFO L82 PathProgramCache]: Analyzing trace with hash -2078452856, now seen corresponding path program 92 times [2021-06-05 07:02:49,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:49,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008992486] [2021-06-05 07:02:49,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:49,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:49,772 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:02:49,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:49,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008992486] [2021-06-05 07:02:49,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008992486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:49,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662305526] [2021-06-05 07:02:49,772 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:49,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:02:49,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:49,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:02:49,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:49,869 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 07:02:49,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662305526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:49,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:49,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-05 07:02:49,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418535558] [2021-06-05 07:02:49,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:02:49,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:49,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:02:49,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:02:49,869 INFO L87 Difference]: Start difference. First operand 14801 states and 51098 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 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 07:02:50,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:50,816 INFO L93 Difference]: Finished difference Result 26862 states and 89241 transitions. [2021-06-05 07:02:50,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 07:02:50,817 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 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 36 [2021-06-05 07:02:50,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:50,859 INFO L225 Difference]: With dead ends: 26862 [2021-06-05 07:02:50,859 INFO L226 Difference]: Without dead ends: 26794 [2021-06-05 07:02:50,859 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1546 ImplicationChecksByTransitivity, 520.6ms TimeCoverageRelationStatistics Valid=916, Invalid=3640, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 07:02:50,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26794 states. [2021-06-05 07:02:51,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26794 to 14135. [2021-06-05 07:02:51,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14135 states, 14134 states have (on average 3.475944530918353) internal successors, (49129), 14134 states have internal predecessors, (49129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:51,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14135 states to 14135 states and 49129 transitions. [2021-06-05 07:02:51,168 INFO L78 Accepts]: Start accepts. Automaton has 14135 states and 49129 transitions. Word has length 36 [2021-06-05 07:02:51,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:51,168 INFO L482 AbstractCegarLoop]: Abstraction has 14135 states and 49129 transitions. [2021-06-05 07:02:51,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 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 07:02:51,168 INFO L276 IsEmpty]: Start isEmpty. Operand 14135 states and 49129 transitions. [2021-06-05 07:02:51,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:02:51,187 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:51,187 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:02:51,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:51,387 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:51,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:51,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1434655568, now seen corresponding path program 93 times [2021-06-05 07:02:51,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:51,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185317976] [2021-06-05 07:02:51,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:51,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:51,449 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:51,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:51,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185317976] [2021-06-05 07:02:51,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185317976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:51,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388345274] [2021-06-05 07:02:51,449 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:51,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 07:02:51,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:51,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:02:51,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:51,565 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:51,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388345274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:51,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:51,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 17 [2021-06-05 07:02:51,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268618899] [2021-06-05 07:02:51,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:02:51,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:51,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:02:51,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:02:51,565 INFO L87 Difference]: Start difference. First operand 14135 states and 49129 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 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 07:02:52,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:52,373 INFO L93 Difference]: Finished difference Result 25932 states and 85483 transitions. [2021-06-05 07:02:52,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 07:02:52,373 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 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 36 [2021-06-05 07:02:52,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:52,418 INFO L225 Difference]: With dead ends: 25932 [2021-06-05 07:02:52,418 INFO L226 Difference]: Without dead ends: 25932 [2021-06-05 07:02:52,419 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1372 ImplicationChecksByTransitivity, 470.7ms TimeCoverageRelationStatistics Valid=923, Invalid=2983, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 07:02:52,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25932 states. [2021-06-05 07:02:52,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25932 to 14667. [2021-06-05 07:02:52,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14667 states, 14666 states have (on average 3.455407063957453) internal successors, (50677), 14666 states have internal predecessors, (50677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:52,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14667 states to 14667 states and 50677 transitions. [2021-06-05 07:02:52,759 INFO L78 Accepts]: Start accepts. Automaton has 14667 states and 50677 transitions. Word has length 36 [2021-06-05 07:02:52,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:52,759 INFO L482 AbstractCegarLoop]: Abstraction has 14667 states and 50677 transitions. [2021-06-05 07:02:52,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 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 07:02:52,759 INFO L276 IsEmpty]: Start isEmpty. Operand 14667 states and 50677 transitions. [2021-06-05 07:02:52,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:02:52,778 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:52,778 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:02:52,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-05 07:02:52,979 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:52,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:52,979 INFO L82 PathProgramCache]: Analyzing trace with hash 296378270, now seen corresponding path program 94 times [2021-06-05 07:02:52,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:52,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389626969] [2021-06-05 07:02:52,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:52,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:53,029 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:53,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:53,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389626969] [2021-06-05 07:02:53,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389626969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:53,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338241987] [2021-06-05 07:02:53,029 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:53,052 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:02:53,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:53,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:02:53,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:53,144 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:02:53,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338241987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:53,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:53,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 07:02:53,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869946746] [2021-06-05 07:02:53,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:02:53,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:53,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:02:53,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:02:53,145 INFO L87 Difference]: Start difference. First operand 14667 states and 50677 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 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 07:02:54,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:54,726 INFO L93 Difference]: Finished difference Result 27978 states and 91670 transitions. [2021-06-05 07:02:54,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-06-05 07:02:54,726 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 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 07:02:54,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:54,775 INFO L225 Difference]: With dead ends: 27978 [2021-06-05 07:02:54,775 INFO L226 Difference]: Without dead ends: 27978 [2021-06-05 07:02:54,776 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5435 ImplicationChecksByTransitivity, 1058.4ms TimeCoverageRelationStatistics Valid=2370, Invalid=10740, Unknown=0, NotChecked=0, Total=13110 [2021-06-05 07:02:54,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27978 states. [2021-06-05 07:02:55,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27978 to 13839. [2021-06-05 07:02:55,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13839 states, 13838 states have (on average 3.4976875270992918) internal successors, (48401), 13838 states have internal predecessors, (48401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:55,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13839 states to 13839 states and 48401 transitions. [2021-06-05 07:02:55,122 INFO L78 Accepts]: Start accepts. Automaton has 13839 states and 48401 transitions. Word has length 36 [2021-06-05 07:02:55,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:55,123 INFO L482 AbstractCegarLoop]: Abstraction has 13839 states and 48401 transitions. [2021-06-05 07:02:55,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 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 07:02:55,123 INFO L276 IsEmpty]: Start isEmpty. Operand 13839 states and 48401 transitions. [2021-06-05 07:02:55,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:02:55,142 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:55,142 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:02:55,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 07:02:55,342 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:55,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:55,342 INFO L82 PathProgramCache]: Analyzing trace with hash -384155512, now seen corresponding path program 95 times [2021-06-05 07:02:55,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:55,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138154873] [2021-06-05 07:02:55,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:55,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:55,400 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:55,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:55,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138154873] [2021-06-05 07:02:55,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138154873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:55,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25134495] [2021-06-05 07:02:55,401 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:55,426 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 07:02:55,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:55,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:02:55,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:55,504 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:55,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25134495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:55,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:55,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 17 [2021-06-05 07:02:55,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437512139] [2021-06-05 07:02:55,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:02:55,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:55,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:02:55,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:02:55,505 INFO L87 Difference]: Start difference. First operand 13839 states and 48401 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 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 07:02:56,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:02:56,617 INFO L93 Difference]: Finished difference Result 26069 states and 86821 transitions. [2021-06-05 07:02:56,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 07:02:56,617 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 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 36 [2021-06-05 07:02:56,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:02:56,663 INFO L225 Difference]: With dead ends: 26069 [2021-06-05 07:02:56,663 INFO L226 Difference]: Without dead ends: 25977 [2021-06-05 07:02:56,664 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2317 ImplicationChecksByTransitivity, 665.9ms TimeCoverageRelationStatistics Valid=1207, Invalid=5435, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 07:02:56,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25977 states. [2021-06-05 07:02:57,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25977 to 14407. [2021-06-05 07:02:57,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14407 states, 14406 states have (on average 3.470637234485631) internal successors, (49998), 14406 states have internal predecessors, (49998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:02:57,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14407 states to 14407 states and 49998 transitions. [2021-06-05 07:02:57,062 INFO L78 Accepts]: Start accepts. Automaton has 14407 states and 49998 transitions. Word has length 36 [2021-06-05 07:02:57,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:02:57,062 INFO L482 AbstractCegarLoop]: Abstraction has 14407 states and 49998 transitions. [2021-06-05 07:02:57,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 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 07:02:57,062 INFO L276 IsEmpty]: Start isEmpty. Operand 14407 states and 49998 transitions. [2021-06-05 07:02:57,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:02:57,080 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:02:57,080 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:02:57,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-06-05 07:02:57,282 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:02:57,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:02:57,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1269898876, now seen corresponding path program 96 times [2021-06-05 07:02:57,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:02:57,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907271990] [2021-06-05 07:02:57,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:02:57,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:02:57,331 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:57,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:02:57,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907271990] [2021-06-05 07:02:57,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907271990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:57,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300243302] [2021-06-05 07:02:57,331 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:02:57,355 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 07:02:57,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:02:57,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 07:02:57,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:02:57,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 07:02:57,436 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:02:57,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:02:57,444 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:02:57,444 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-05 07:02:57,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:02:57,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-06-05 07:02:57,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:02:57,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:02:57,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:02:57,496 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-05 07:02:57,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:02:57,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:02:57,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:02:57,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 32 [2021-06-05 07:02:57,528 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:02:57,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:02:57,537 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 07:02:57,537 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:38 [2021-06-05 07:02:57,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:02:57,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:02:57,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2021-06-05 07:02:57,571 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:02:57,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:02:57,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 07:02:57,580 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:34 [2021-06-05 07:02:57,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:02:57,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:02:57,634 INFO L354 Elim1Store]: treesize reduction 48, result has 25.0 percent of original size [2021-06-05 07:02:57,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 38 [2021-06-05 07:02:57,635 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:02:57,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:02:57,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 07:02:57,647 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:46 [2021-06-05 07:02:57,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:02:57,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:02:57,723 INFO L354 Elim1Store]: treesize reduction 88, result has 19.3 percent of original size [2021-06-05 07:02:57,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 37 treesize of output 48 [2021-06-05 07:02:57,724 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:02:57,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:02:57,741 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 07:02:57,741 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:59, output treesize:58 [2021-06-05 07:02:57,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:02:57,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:02:57,869 INFO L354 Elim1Store]: treesize reduction 136, result has 16.0 percent of original size [2021-06-05 07:02:57,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 58 [2021-06-05 07:02:57,871 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:02:57,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:02:57,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 07:02:57,892 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:71, output treesize:70 [2021-06-05 07:02:58,036 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:02:58,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300243302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:02:58,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:02:58,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-06-05 07:02:58,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121348305] [2021-06-05 07:02:58,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 07:02:58,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:02:58,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 07:02:58,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2021-06-05 07:02:58,038 INFO L87 Difference]: Start difference. First operand 14407 states and 49998 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:00,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:00,630 INFO L93 Difference]: Finished difference Result 19437 states and 64480 transitions. [2021-06-05 07:03:00,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 07:03:00,630 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have 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 07:03:00,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:00,661 INFO L225 Difference]: With dead ends: 19437 [2021-06-05 07:03:00,661 INFO L226 Difference]: Without dead ends: 19021 [2021-06-05 07:03:00,662 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1992 ImplicationChecksByTransitivity, 1652.8ms TimeCoverageRelationStatistics Valid=651, Invalid=5829, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 07:03:00,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19021 states. [2021-06-05 07:03:00,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19021 to 15957. [2021-06-05 07:03:00,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15957 states, 15956 states have (on average 3.4367009275507647) internal successors, (54836), 15956 states have internal predecessors, (54836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:00,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15957 states to 15957 states and 54836 transitions. [2021-06-05 07:03:00,948 INFO L78 Accepts]: Start accepts. Automaton has 15957 states and 54836 transitions. Word has length 36 [2021-06-05 07:03:00,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:00,948 INFO L482 AbstractCegarLoop]: Abstraction has 15957 states and 54836 transitions. [2021-06-05 07:03:00,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:00,948 INFO L276 IsEmpty]: Start isEmpty. Operand 15957 states and 54836 transitions. [2021-06-05 07:03:00,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:03:00,968 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:00,968 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:03:01,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:01,170 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:01,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:01,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1525571952, now seen corresponding path program 97 times [2021-06-05 07:03:01,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:01,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083353919] [2021-06-05 07:03:01,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:01,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:01,240 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:01,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:01,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083353919] [2021-06-05 07:03:01,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083353919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:01,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191778531] [2021-06-05 07:03:01,241 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:01,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:01,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:03:01,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:01,474 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:01,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191778531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:01,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:01,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 07:03:01,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805414944] [2021-06-05 07:03:01,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:03:01,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:01,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:03:01,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:03:01,475 INFO L87 Difference]: Start difference. First operand 15957 states and 54836 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 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 07:03:02,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:02,648 INFO L93 Difference]: Finished difference Result 31024 states and 101059 transitions. [2021-06-05 07:03:02,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 07:03:02,648 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 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 07:03:02,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:02,701 INFO L225 Difference]: With dead ends: 31024 [2021-06-05 07:03:02,702 INFO L226 Difference]: Without dead ends: 31024 [2021-06-05 07:03:02,702 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1828 ImplicationChecksByTransitivity, 843.6ms TimeCoverageRelationStatistics Valid=1344, Invalid=3912, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 07:03:02,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31024 states. [2021-06-05 07:03:03,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31024 to 16979. [2021-06-05 07:03:03,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16979 states, 16978 states have (on average 3.408234185416421) internal successors, (57865), 16978 states have internal predecessors, (57865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:03,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16979 states to 16979 states and 57865 transitions. [2021-06-05 07:03:03,112 INFO L78 Accepts]: Start accepts. Automaton has 16979 states and 57865 transitions. Word has length 36 [2021-06-05 07:03:03,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:03,112 INFO L482 AbstractCegarLoop]: Abstraction has 16979 states and 57865 transitions. [2021-06-05 07:03:03,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 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 07:03:03,112 INFO L276 IsEmpty]: Start isEmpty. Operand 16979 states and 57865 transitions. [2021-06-05 07:03:03,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:03:03,134 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:03,134 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:03:03,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-05 07:03:03,335 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:03,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:03,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1354812750, now seen corresponding path program 98 times [2021-06-05 07:03:03,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:03,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541030658] [2021-06-05 07:03:03,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:03,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:03,386 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:03,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:03,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541030658] [2021-06-05 07:03:03,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541030658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:03,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399548500] [2021-06-05 07:03:03,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:03,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:03:03,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:03,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:03:03,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:03,545 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:03:03,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399548500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:03,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:03,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-05 07:03:03,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669533319] [2021-06-05 07:03:03,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:03:03,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:03,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:03:03,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:03:03,546 INFO L87 Difference]: Start difference. First operand 16979 states and 57865 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 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 07:03:05,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:05,810 INFO L93 Difference]: Finished difference Result 33282 states and 107796 transitions. [2021-06-05 07:03:05,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2021-06-05 07:03:05,811 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 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 07:03:05,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:05,866 INFO L225 Difference]: With dead ends: 33282 [2021-06-05 07:03:05,867 INFO L226 Difference]: Without dead ends: 33254 [2021-06-05 07:03:05,868 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7204 ImplicationChecksByTransitivity, 1662.5ms TimeCoverageRelationStatistics Valid=3502, Invalid=14320, Unknown=0, NotChecked=0, Total=17822 [2021-06-05 07:03:05,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33254 states. [2021-06-05 07:03:06,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33254 to 16803. [2021-06-05 07:03:06,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16803 states, 16802 states have (on average 3.411082014045947) internal successors, (57313), 16802 states have internal predecessors, (57313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:06,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16803 states to 16803 states and 57313 transitions. [2021-06-05 07:03:06,286 INFO L78 Accepts]: Start accepts. Automaton has 16803 states and 57313 transitions. Word has length 36 [2021-06-05 07:03:06,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:06,287 INFO L482 AbstractCegarLoop]: Abstraction has 16803 states and 57313 transitions. [2021-06-05 07:03:06,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 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 07:03:06,287 INFO L276 IsEmpty]: Start isEmpty. Operand 16803 states and 57313 transitions. [2021-06-05 07:03:06,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:03:06,308 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:06,309 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:03:06,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-05 07:03:06,509 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:06,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:06,509 INFO L82 PathProgramCache]: Analyzing trace with hash 2057609742, now seen corresponding path program 99 times [2021-06-05 07:03:06,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:06,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146154548] [2021-06-05 07:03:06,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:06,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:06,560 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:06,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:06,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146154548] [2021-06-05 07:03:06,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146154548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:06,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752772665] [2021-06-05 07:03:06,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:06,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 07:03:06,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:06,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:03:06,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:06,691 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:06,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752772665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:06,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:06,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 07:03:06,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095033667] [2021-06-05 07:03:06,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:03:06,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:06,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:03:06,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:03:06,691 INFO L87 Difference]: Start difference. First operand 16803 states and 57313 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 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 07:03:08,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:08,035 INFO L93 Difference]: Finished difference Result 30475 states and 100578 transitions. [2021-06-05 07:03:08,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-05 07:03:08,036 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 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 07:03:08,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:08,088 INFO L225 Difference]: With dead ends: 30475 [2021-06-05 07:03:08,088 INFO L226 Difference]: Without dead ends: 30411 [2021-06-05 07:03:08,089 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2777 ImplicationChecksByTransitivity, 872.5ms TimeCoverageRelationStatistics Valid=1678, Invalid=5978, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 07:03:08,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30411 states. [2021-06-05 07:03:08,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30411 to 16624. [2021-06-05 07:03:08,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16624 states, 16623 states have (on average 3.411417914937135) internal successors, (56708), 16623 states have internal predecessors, (56708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:08,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16624 states to 16624 states and 56708 transitions. [2021-06-05 07:03:08,518 INFO L78 Accepts]: Start accepts. Automaton has 16624 states and 56708 transitions. Word has length 36 [2021-06-05 07:03:08,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:08,518 INFO L482 AbstractCegarLoop]: Abstraction has 16624 states and 56708 transitions. [2021-06-05 07:03:08,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 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 07:03:08,518 INFO L276 IsEmpty]: Start isEmpty. Operand 16624 states and 56708 transitions. [2021-06-05 07:03:08,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:03:08,540 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:08,540 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:03:08,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:08,741 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:08,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:08,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1448352448, now seen corresponding path program 100 times [2021-06-05 07:03:08,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:08,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406576201] [2021-06-05 07:03:08,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:08,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:08,792 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:08,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:08,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406576201] [2021-06-05 07:03:08,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406576201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:08,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596164257] [2021-06-05 07:03:08,793 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:08,815 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:03:08,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:08,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:03:08,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:08,937 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:08,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596164257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:08,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:08,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-06-05 07:03:08,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009946341] [2021-06-05 07:03:08,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 07:03:08,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:08,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 07:03:08,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-06-05 07:03:08,938 INFO L87 Difference]: Start difference. First operand 16624 states and 56708 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 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 07:03:09,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:09,852 INFO L93 Difference]: Finished difference Result 32379 states and 105054 transitions. [2021-06-05 07:03:09,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 07:03:09,853 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 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 07:03:09,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:09,906 INFO L225 Difference]: With dead ends: 32379 [2021-06-05 07:03:09,906 INFO L226 Difference]: Without dead ends: 32379 [2021-06-05 07:03:09,907 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 949 ImplicationChecksByTransitivity, 507.1ms TimeCoverageRelationStatistics Valid=832, Invalid=2360, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 07:03:09,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32379 states. [2021-06-05 07:03:10,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32379 to 17402. [2021-06-05 07:03:10,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17402 states, 17401 states have (on average 3.3985977817366817) internal successors, (59139), 17401 states have internal predecessors, (59139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:10,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17402 states to 17402 states and 59139 transitions. [2021-06-05 07:03:10,324 INFO L78 Accepts]: Start accepts. Automaton has 17402 states and 59139 transitions. Word has length 36 [2021-06-05 07:03:10,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:10,324 INFO L482 AbstractCegarLoop]: Abstraction has 17402 states and 59139 transitions. [2021-06-05 07:03:10,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 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 07:03:10,324 INFO L276 IsEmpty]: Start isEmpty. Operand 17402 states and 59139 transitions. [2021-06-05 07:03:10,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:03:10,346 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:10,346 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:03:10,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:10,547 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:10,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:10,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1791237454, now seen corresponding path program 101 times [2021-06-05 07:03:10,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:10,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750220806] [2021-06-05 07:03:10,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:10,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:10,598 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:10,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:10,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750220806] [2021-06-05 07:03:10,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750220806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:10,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422441709] [2021-06-05 07:03:10,599 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:10,624 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 07:03:10,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:10,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:03:10,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:10,740 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:10,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422441709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:10,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:10,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-06-05 07:03:10,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308607193] [2021-06-05 07:03:10,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 07:03:10,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:10,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 07:03:10,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-06-05 07:03:10,741 INFO L87 Difference]: Start difference. First operand 17402 states and 59139 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 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 07:03:11,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:11,559 INFO L93 Difference]: Finished difference Result 31791 states and 103499 transitions. [2021-06-05 07:03:11,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 07:03:11,559 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 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 07:03:11,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:11,610 INFO L225 Difference]: With dead ends: 31791 [2021-06-05 07:03:11,610 INFO L226 Difference]: Without dead ends: 31779 [2021-06-05 07:03:11,610 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 411.7ms TimeCoverageRelationStatistics Valid=606, Invalid=1944, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 07:03:11,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31779 states. [2021-06-05 07:03:11,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31779 to 17354. [2021-06-05 07:03:11,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17354 states, 17353 states have (on average 3.3990088169192645) internal successors, (58983), 17353 states have internal predecessors, (58983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:12,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17354 states to 17354 states and 58983 transitions. [2021-06-05 07:03:12,010 INFO L78 Accepts]: Start accepts. Automaton has 17354 states and 58983 transitions. Word has length 36 [2021-06-05 07:03:12,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:12,010 INFO L482 AbstractCegarLoop]: Abstraction has 17354 states and 58983 transitions. [2021-06-05 07:03:12,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 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 07:03:12,010 INFO L276 IsEmpty]: Start isEmpty. Operand 17354 states and 58983 transitions. [2021-06-05 07:03:12,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:03:12,032 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:12,033 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:03:12,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:12,233 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:12,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:12,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1020594904, now seen corresponding path program 102 times [2021-06-05 07:03:12,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:12,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905579279] [2021-06-05 07:03:12,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:12,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:12,283 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:12,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:12,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905579279] [2021-06-05 07:03:12,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905579279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:12,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887370985] [2021-06-05 07:03:12,283 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:12,307 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 07:03:12,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:12,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:03:12,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:12,417 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:03:12,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887370985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:12,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:12,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-06-05 07:03:12,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456753705] [2021-06-05 07:03:12,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 07:03:12,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:12,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 07:03:12,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-06-05 07:03:12,417 INFO L87 Difference]: Start difference. First operand 17354 states and 58983 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 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 07:03:15,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:15,292 INFO L93 Difference]: Finished difference Result 32845 states and 106582 transitions. [2021-06-05 07:03:15,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2021-06-05 07:03:15,292 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 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 07:03:15,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:15,344 INFO L225 Difference]: With dead ends: 32845 [2021-06-05 07:03:15,344 INFO L226 Difference]: Without dead ends: 32825 [2021-06-05 07:03:15,345 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11588 ImplicationChecksByTransitivity, 2103.7ms TimeCoverageRelationStatistics Valid=4603, Invalid=23453, Unknown=0, NotChecked=0, Total=28056 [2021-06-05 07:03:15,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32825 states. [2021-06-05 07:03:15,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32825 to 17254. [2021-06-05 07:03:15,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17254 states, 17253 states have (on average 3.4028284935953166) internal successors, (58709), 17253 states have internal predecessors, (58709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:15,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17254 states to 17254 states and 58709 transitions. [2021-06-05 07:03:15,740 INFO L78 Accepts]: Start accepts. Automaton has 17254 states and 58709 transitions. Word has length 36 [2021-06-05 07:03:15,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:15,740 INFO L482 AbstractCegarLoop]: Abstraction has 17254 states and 58709 transitions. [2021-06-05 07:03:15,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 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 07:03:15,740 INFO L276 IsEmpty]: Start isEmpty. Operand 17254 states and 58709 transitions. [2021-06-05 07:03:15,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:03:15,763 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:15,763 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:03:15,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-05 07:03:15,963 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:15,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:15,963 INFO L82 PathProgramCache]: Analyzing trace with hash 590890608, now seen corresponding path program 103 times [2021-06-05 07:03:15,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:15,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057912715] [2021-06-05 07:03:15,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:15,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:16,016 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:03:16,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:16,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057912715] [2021-06-05 07:03:16,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057912715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:16,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326067652] [2021-06-05 07:03:16,016 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:16,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:16,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:03:16,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:16,158 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:16,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326067652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:16,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:16,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 07:03:16,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988678813] [2021-06-05 07:03:16,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:03:16,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:16,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:03:16,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:03:16,158 INFO L87 Difference]: Start difference. First operand 17254 states and 58709 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 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 07:03:16,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:16,802 INFO L93 Difference]: Finished difference Result 36771 states and 121891 transitions. [2021-06-05 07:03:16,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 07:03:16,802 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 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 36 [2021-06-05 07:03:16,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:16,867 INFO L225 Difference]: With dead ends: 36771 [2021-06-05 07:03:16,868 INFO L226 Difference]: Without dead ends: 36771 [2021-06-05 07:03:16,868 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 290.3ms TimeCoverageRelationStatistics Valid=403, Invalid=1157, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 07:03:16,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36771 states. [2021-06-05 07:03:17,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36771 to 17615. [2021-06-05 07:03:17,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17615 states, 17614 states have (on average 3.421653230384921) internal successors, (60269), 17614 states have internal predecessors, (60269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:17,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17615 states to 17615 states and 60269 transitions. [2021-06-05 07:03:17,323 INFO L78 Accepts]: Start accepts. Automaton has 17615 states and 60269 transitions. Word has length 36 [2021-06-05 07:03:17,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:17,323 INFO L482 AbstractCegarLoop]: Abstraction has 17615 states and 60269 transitions. [2021-06-05 07:03:17,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 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 07:03:17,323 INFO L276 IsEmpty]: Start isEmpty. Operand 17615 states and 60269 transitions. [2021-06-05 07:03:17,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:03:17,345 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:17,345 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:03:17,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-05 07:03:17,545 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:17,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:17,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1255821764, now seen corresponding path program 104 times [2021-06-05 07:03:17,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:17,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636338678] [2021-06-05 07:03:17,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:17,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:17,603 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:17,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:17,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636338678] [2021-06-05 07:03:17,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636338678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:17,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102783691] [2021-06-05 07:03:17,604 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:17,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:03:17,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:17,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:03:17,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:17,840 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:03:17,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102783691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:17,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:17,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-06-05 07:03:17,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333952740] [2021-06-05 07:03:17,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:03:17,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:17,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:03:17,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:03:17,841 INFO L87 Difference]: Start difference. First operand 17615 states and 60269 transitions. Second operand has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:20,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:20,645 INFO L93 Difference]: Finished difference Result 43448 states and 142049 transitions. [2021-06-05 07:03:20,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2021-06-05 07:03:20,645 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have 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 07:03:20,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:20,721 INFO L225 Difference]: With dead ends: 43448 [2021-06-05 07:03:20,721 INFO L226 Difference]: Without dead ends: 43448 [2021-06-05 07:03:20,723 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11743 ImplicationChecksByTransitivity, 2089.7ms TimeCoverageRelationStatistics Valid=5181, Invalid=22209, Unknown=0, NotChecked=0, Total=27390 [2021-06-05 07:03:20,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43448 states. [2021-06-05 07:03:21,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43448 to 17843. [2021-06-05 07:03:21,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17843 states, 17842 states have (on average 3.444064566752606) internal successors, (61449), 17842 states have internal predecessors, (61449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:21,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17843 states to 17843 states and 61449 transitions. [2021-06-05 07:03:21,357 INFO L78 Accepts]: Start accepts. Automaton has 17843 states and 61449 transitions. Word has length 36 [2021-06-05 07:03:21,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:21,357 INFO L482 AbstractCegarLoop]: Abstraction has 17843 states and 61449 transitions. [2021-06-05 07:03:21,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:21,357 INFO L276 IsEmpty]: Start isEmpty. Operand 17843 states and 61449 transitions. [2021-06-05 07:03:21,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:03:21,379 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:21,379 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:03:21,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-05 07:03:21,579 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:21,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:21,580 INFO L82 PathProgramCache]: Analyzing trace with hash -428849322, now seen corresponding path program 105 times [2021-06-05 07:03:21,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:21,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917741960] [2021-06-05 07:03:21,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:21,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:21,649 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:21,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:21,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917741960] [2021-06-05 07:03:21,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917741960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:21,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693921878] [2021-06-05 07:03:21,650 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:21,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 07:03:21,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:21,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:03:21,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:21,806 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:21,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693921878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:21,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:21,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 07:03:21,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124186112] [2021-06-05 07:03:21,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:03:21,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:21,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:03:21,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:03:21,807 INFO L87 Difference]: Start difference. First operand 17843 states and 61449 transitions. Second operand has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 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 07:03:23,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:23,877 INFO L93 Difference]: Finished difference Result 39837 states and 131123 transitions. [2021-06-05 07:03:23,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-06-05 07:03:23,878 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 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 07:03:23,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:23,948 INFO L225 Difference]: With dead ends: 39837 [2021-06-05 07:03:23,948 INFO L226 Difference]: Without dead ends: 39721 [2021-06-05 07:03:23,950 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6312 ImplicationChecksByTransitivity, 1386.5ms TimeCoverageRelationStatistics Valid=3104, Invalid=12396, Unknown=0, NotChecked=0, Total=15500 [2021-06-05 07:03:23,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39721 states. [2021-06-05 07:03:24,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39721 to 17669. [2021-06-05 07:03:24,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17669 states, 17668 states have (on average 3.4479284582295677) internal successors, (60918), 17668 states have internal predecessors, (60918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:24,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17669 states to 17669 states and 60918 transitions. [2021-06-05 07:03:24,474 INFO L78 Accepts]: Start accepts. Automaton has 17669 states and 60918 transitions. Word has length 36 [2021-06-05 07:03:24,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:24,474 INFO L482 AbstractCegarLoop]: Abstraction has 17669 states and 60918 transitions. [2021-06-05 07:03:24,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 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 07:03:24,474 INFO L276 IsEmpty]: Start isEmpty. Operand 17669 states and 60918 transitions. [2021-06-05 07:03:24,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:03:24,497 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:24,497 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:03:24,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-05 07:03:24,697 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:24,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:24,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1065316176, now seen corresponding path program 106 times [2021-06-05 07:03:24,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:24,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315562511] [2021-06-05 07:03:24,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:24,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:24,755 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:24,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:24,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315562511] [2021-06-05 07:03:24,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315562511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:24,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408181144] [2021-06-05 07:03:24,756 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:24,778 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:03:24,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:24,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:03:24,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:24,886 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:03:24,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408181144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:24,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:24,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-06-05 07:03:24,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772991233] [2021-06-05 07:03:24,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 07:03:24,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:24,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 07:03:24,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-06-05 07:03:24,886 INFO L87 Difference]: Start difference. First operand 17669 states and 60918 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 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 07:03:26,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:26,742 INFO L93 Difference]: Finished difference Result 38843 states and 128526 transitions. [2021-06-05 07:03:26,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-06-05 07:03:26,743 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 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 07:03:26,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:26,810 INFO L225 Difference]: With dead ends: 38843 [2021-06-05 07:03:26,810 INFO L226 Difference]: Without dead ends: 38727 [2021-06-05 07:03:26,811 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5135 ImplicationChecksByTransitivity, 1177.8ms TimeCoverageRelationStatistics Valid=2357, Invalid=10983, Unknown=0, NotChecked=0, Total=13340 [2021-06-05 07:03:26,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38727 states. [2021-06-05 07:03:27,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38727 to 17699. [2021-06-05 07:03:27,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17699 states, 17698 states have (on average 3.446208611142502) internal successors, (60991), 17698 states have internal predecessors, (60991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:27,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17699 states to 17699 states and 60991 transitions. [2021-06-05 07:03:27,312 INFO L78 Accepts]: Start accepts. Automaton has 17699 states and 60991 transitions. Word has length 36 [2021-06-05 07:03:27,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:27,312 INFO L482 AbstractCegarLoop]: Abstraction has 17699 states and 60991 transitions. [2021-06-05 07:03:27,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 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 07:03:27,312 INFO L276 IsEmpty]: Start isEmpty. Operand 17699 states and 60991 transitions. [2021-06-05 07:03:27,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:03:27,335 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:27,335 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:03:27,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:27,535 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:27,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:27,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1348989260, now seen corresponding path program 107 times [2021-06-05 07:03:27,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:27,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587970042] [2021-06-05 07:03:27,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:27,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:27,596 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:27,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:27,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587970042] [2021-06-05 07:03:27,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587970042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:27,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580221130] [2021-06-05 07:03:27,597 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:27,621 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 07:03:27,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:27,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:03:27,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:27,720 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:03:27,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580221130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:27,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:27,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 19 [2021-06-05 07:03:27,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985806567] [2021-06-05 07:03:27,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:03:27,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:27,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:03:27,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:03:27,721 INFO L87 Difference]: Start difference. First operand 17699 states and 60991 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 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 07:03:29,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:29,400 INFO L93 Difference]: Finished difference Result 37783 states and 125271 transitions. [2021-06-05 07:03:29,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-06-05 07:03:29,400 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 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 36 [2021-06-05 07:03:29,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:29,466 INFO L225 Difference]: With dead ends: 37783 [2021-06-05 07:03:29,466 INFO L226 Difference]: Without dead ends: 37663 [2021-06-05 07:03:29,467 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4108 ImplicationChecksByTransitivity, 1082.0ms TimeCoverageRelationStatistics Valid=2049, Invalid=9081, Unknown=0, NotChecked=0, Total=11130 [2021-06-05 07:03:29,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37663 states. [2021-06-05 07:03:29,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37663 to 18035. [2021-06-05 07:03:29,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18035 states, 18034 states have (on average 3.456692913385827) internal successors, (62338), 18034 states have internal predecessors, (62338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:30,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18035 states to 18035 states and 62338 transitions. [2021-06-05 07:03:30,002 INFO L78 Accepts]: Start accepts. Automaton has 18035 states and 62338 transitions. Word has length 36 [2021-06-05 07:03:30,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:30,002 INFO L482 AbstractCegarLoop]: Abstraction has 18035 states and 62338 transitions. [2021-06-05 07:03:30,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 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 07:03:30,002 INFO L276 IsEmpty]: Start isEmpty. Operand 18035 states and 62338 transitions. [2021-06-05 07:03:30,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:03:30,025 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:30,025 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:03:30,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-05 07:03:30,226 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:30,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:30,226 INFO L82 PathProgramCache]: Analyzing trace with hash 255839428, now seen corresponding path program 108 times [2021-06-05 07:03:30,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:30,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055859886] [2021-06-05 07:03:30,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:30,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:30,265 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:03:30,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:30,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055859886] [2021-06-05 07:03:30,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055859886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:30,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249900946] [2021-06-05 07:03:30,265 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:30,288 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 07:03:30,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:30,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:03:30,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:30,395 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:30,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249900946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:30,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:30,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 07:03:30,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500902442] [2021-06-05 07:03:30,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:03:30,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:30,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:03:30,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:03:30,396 INFO L87 Difference]: Start difference. First operand 18035 states and 62338 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:31,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:31,814 INFO L93 Difference]: Finished difference Result 41243 states and 137063 transitions. [2021-06-05 07:03:31,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-05 07:03:31,814 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 07:03:31,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:31,886 INFO L225 Difference]: With dead ends: 41243 [2021-06-05 07:03:31,886 INFO L226 Difference]: Without dead ends: 41243 [2021-06-05 07:03:31,886 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2866 ImplicationChecksByTransitivity, 853.4ms TimeCoverageRelationStatistics Valid=1732, Invalid=6100, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 07:03:31,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41243 states. [2021-06-05 07:03:32,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41243 to 18004. [2021-06-05 07:03:32,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18004 states, 18003 states have (on average 3.4605343553852137) internal successors, (62300), 18003 states have internal predecessors, (62300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:32,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18004 states to 18004 states and 62300 transitions. [2021-06-05 07:03:32,375 INFO L78 Accepts]: Start accepts. Automaton has 18004 states and 62300 transitions. Word has length 36 [2021-06-05 07:03:32,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:32,375 INFO L482 AbstractCegarLoop]: Abstraction has 18004 states and 62300 transitions. [2021-06-05 07:03:32,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:32,375 INFO L276 IsEmpty]: Start isEmpty. Operand 18004 states and 62300 transitions. [2021-06-05 07:03:32,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:03:32,398 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:32,398 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:03:32,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-06-05 07:03:32,598 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:32,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:32,599 INFO L82 PathProgramCache]: Analyzing trace with hash 30795628, now seen corresponding path program 109 times [2021-06-05 07:03:32,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:32,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727864450] [2021-06-05 07:03:32,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:32,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:32,662 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:32,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:32,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727864450] [2021-06-05 07:03:32,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727864450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:32,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447054862] [2021-06-05 07:03:32,663 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:32,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:32,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:03:32,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:32,880 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:03:32,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447054862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:32,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:32,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 07:03:32,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603764423] [2021-06-05 07:03:32,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:03:32,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:32,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:03:32,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:03:32,881 INFO L87 Difference]: Start difference. First operand 18004 states and 62300 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 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 07:03:34,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:34,292 INFO L93 Difference]: Finished difference Result 39031 states and 128601 transitions. [2021-06-05 07:03:34,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-06-05 07:03:34,293 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 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 36 [2021-06-05 07:03:34,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:34,360 INFO L225 Difference]: With dead ends: 39031 [2021-06-05 07:03:34,360 INFO L226 Difference]: Without dead ends: 38811 [2021-06-05 07:03:34,360 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2721 ImplicationChecksByTransitivity, 841.4ms TimeCoverageRelationStatistics Valid=1466, Invalid=6190, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 07:03:34,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38811 states. [2021-06-05 07:03:34,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38811 to 18070. [2021-06-05 07:03:34,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18070 states, 18069 states have (on average 3.458354087110521) internal successors, (62489), 18069 states have internal predecessors, (62489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:34,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18070 states to 18070 states and 62489 transitions. [2021-06-05 07:03:34,863 INFO L78 Accepts]: Start accepts. Automaton has 18070 states and 62489 transitions. Word has length 36 [2021-06-05 07:03:34,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:34,863 INFO L482 AbstractCegarLoop]: Abstraction has 18070 states and 62489 transitions. [2021-06-05 07:03:34,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 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 07:03:34,863 INFO L276 IsEmpty]: Start isEmpty. Operand 18070 states and 62489 transitions. [2021-06-05 07:03:34,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:03:34,886 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:34,886 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:03:35,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:35,087 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:35,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:35,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1503096560, now seen corresponding path program 110 times [2021-06-05 07:03:35,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:35,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378601367] [2021-06-05 07:03:35,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:35,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:35,139 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:35,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:35,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378601367] [2021-06-05 07:03:35,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378601367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:35,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653050634] [2021-06-05 07:03:35,140 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:35,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:03:35,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:35,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:03:35,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:35,254 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:03:35,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653050634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:35,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:35,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-06-05 07:03:35,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021159881] [2021-06-05 07:03:35,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:03:35,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:35,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:03:35,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:03:35,255 INFO L87 Difference]: Start difference. First operand 18070 states and 62489 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 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 07:03:37,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:37,303 INFO L93 Difference]: Finished difference Result 41905 states and 136821 transitions. [2021-06-05 07:03:37,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-06-05 07:03:37,304 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 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 07:03:37,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:37,376 INFO L225 Difference]: With dead ends: 41905 [2021-06-05 07:03:37,377 INFO L226 Difference]: Without dead ends: 41889 [2021-06-05 07:03:37,378 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7569 ImplicationChecksByTransitivity, 1370.7ms TimeCoverageRelationStatistics Valid=3281, Invalid=14541, Unknown=0, NotChecked=0, Total=17822 [2021-06-05 07:03:37,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41889 states. [2021-06-05 07:03:37,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41889 to 18381. [2021-06-05 07:03:37,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18381 states, 18380 states have (on average 3.4394450489662676) internal successors, (63217), 18380 states have internal predecessors, (63217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:38,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18381 states to 18381 states and 63217 transitions. [2021-06-05 07:03:38,007 INFO L78 Accepts]: Start accepts. Automaton has 18381 states and 63217 transitions. Word has length 36 [2021-06-05 07:03:38,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:38,007 INFO L482 AbstractCegarLoop]: Abstraction has 18381 states and 63217 transitions. [2021-06-05 07:03:38,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 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 07:03:38,007 INFO L276 IsEmpty]: Start isEmpty. Operand 18381 states and 63217 transitions. [2021-06-05 07:03:38,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:03:38,031 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:38,031 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:03:38,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:38,232 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:38,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:38,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1164442992, now seen corresponding path program 111 times [2021-06-05 07:03:38,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:38,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420178671] [2021-06-05 07:03:38,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:38,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:38,292 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:38,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:38,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420178671] [2021-06-05 07:03:38,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420178671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:38,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628251418] [2021-06-05 07:03:38,293 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:38,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 07:03:38,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:38,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:03:38,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:38,405 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:38,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628251418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:38,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:38,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 18 [2021-06-05 07:03:38,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865879241] [2021-06-05 07:03:38,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:03:38,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:38,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:03:38,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:03:38,406 INFO L87 Difference]: Start difference. First operand 18381 states and 63217 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 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 07:03:40,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:40,039 INFO L93 Difference]: Finished difference Result 39347 states and 129043 transitions. [2021-06-05 07:03:40,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-06-05 07:03:40,040 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 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 36 [2021-06-05 07:03:40,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:40,109 INFO L225 Difference]: With dead ends: 39347 [2021-06-05 07:03:40,109 INFO L226 Difference]: Without dead ends: 39111 [2021-06-05 07:03:40,110 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3939 ImplicationChecksByTransitivity, 1021.9ms TimeCoverageRelationStatistics Valid=2013, Invalid=8907, Unknown=0, NotChecked=0, Total=10920 [2021-06-05 07:03:40,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39111 states. [2021-06-05 07:03:40,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39111 to 18459. [2021-06-05 07:03:40,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18459 states, 18458 states have (on average 3.4369920901506124) internal successors, (63440), 18458 states have internal predecessors, (63440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:40,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18459 states to 18459 states and 63440 transitions. [2021-06-05 07:03:40,643 INFO L78 Accepts]: Start accepts. Automaton has 18459 states and 63440 transitions. Word has length 36 [2021-06-05 07:03:40,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:40,643 INFO L482 AbstractCegarLoop]: Abstraction has 18459 states and 63440 transitions. [2021-06-05 07:03:40,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 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 07:03:40,643 INFO L276 IsEmpty]: Start isEmpty. Operand 18459 states and 63440 transitions. [2021-06-05 07:03:40,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:03:40,666 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:40,667 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:03:40,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:40,867 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:40,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:40,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1293569036, now seen corresponding path program 112 times [2021-06-05 07:03:40,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:40,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051860599] [2021-06-05 07:03:40,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:40,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:40,924 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:40,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:40,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051860599] [2021-06-05 07:03:40,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051860599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:40,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860659957] [2021-06-05 07:03:40,924 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:40,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:03:40,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:40,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:03:40,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:41,030 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:03:41,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860659957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:41,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:41,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 18 [2021-06-05 07:03:41,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419142321] [2021-06-05 07:03:41,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:03:41,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:41,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:03:41,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:03:41,031 INFO L87 Difference]: Start difference. First operand 18459 states and 63440 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 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 07:03:42,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:42,710 INFO L93 Difference]: Finished difference Result 38875 states and 128248 transitions. [2021-06-05 07:03:42,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-06-05 07:03:42,710 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 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 36 [2021-06-05 07:03:42,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:42,777 INFO L225 Difference]: With dead ends: 38875 [2021-06-05 07:03:42,777 INFO L226 Difference]: Without dead ends: 38767 [2021-06-05 07:03:42,778 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4742 ImplicationChecksByTransitivity, 1086.4ms TimeCoverageRelationStatistics Valid=2364, Invalid=9626, Unknown=0, NotChecked=0, Total=11990 [2021-06-05 07:03:42,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38767 states. [2021-06-05 07:03:43,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38767 to 18901. [2021-06-05 07:03:43,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18901 states, 18900 states have (on average 3.4197354497354495) internal successors, (64633), 18900 states have internal predecessors, (64633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:43,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18901 states to 18901 states and 64633 transitions. [2021-06-05 07:03:43,301 INFO L78 Accepts]: Start accepts. Automaton has 18901 states and 64633 transitions. Word has length 36 [2021-06-05 07:03:43,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:43,301 INFO L482 AbstractCegarLoop]: Abstraction has 18901 states and 64633 transitions. [2021-06-05 07:03:43,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 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 07:03:43,301 INFO L276 IsEmpty]: Start isEmpty. Operand 18901 states and 64633 transitions. [2021-06-05 07:03:43,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:03:43,325 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:43,325 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:03:43,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2021-06-05 07:03:43,525 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:43,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:43,525 INFO L82 PathProgramCache]: Analyzing trace with hash -253287824, now seen corresponding path program 113 times [2021-06-05 07:03:43,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:43,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084133380] [2021-06-05 07:03:43,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:43,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:43,582 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:43,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:43,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084133380] [2021-06-05 07:03:43,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084133380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:43,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495968607] [2021-06-05 07:03:43,582 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:43,615 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 07:03:43,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:43,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:03:43,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:43,707 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:43,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495968607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:43,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:43,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 19 [2021-06-05 07:03:43,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570585873] [2021-06-05 07:03:43,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:03:43,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:43,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:03:43,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:03:43,708 INFO L87 Difference]: Start difference. First operand 18901 states and 64633 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 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 07:03:46,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:46,058 INFO L93 Difference]: Finished difference Result 40691 states and 133194 transitions. [2021-06-05 07:03:46,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2021-06-05 07:03:46,058 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 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 36 [2021-06-05 07:03:46,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:46,126 INFO L225 Difference]: With dead ends: 40691 [2021-06-05 07:03:46,126 INFO L226 Difference]: Without dead ends: 40691 [2021-06-05 07:03:46,127 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10041 ImplicationChecksByTransitivity, 1653.0ms TimeCoverageRelationStatistics Valid=4335, Invalid=18315, Unknown=0, NotChecked=0, Total=22650 [2021-06-05 07:03:46,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40691 states. [2021-06-05 07:03:46,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40691 to 17027. [2021-06-05 07:03:46,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17027 states, 17026 states have (on average 3.482086221073652) internal successors, (59286), 17026 states have internal predecessors, (59286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:46,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17027 states to 17027 states and 59286 transitions. [2021-06-05 07:03:46,619 INFO L78 Accepts]: Start accepts. Automaton has 17027 states and 59286 transitions. Word has length 36 [2021-06-05 07:03:46,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:46,619 INFO L482 AbstractCegarLoop]: Abstraction has 17027 states and 59286 transitions. [2021-06-05 07:03:46,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 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 07:03:46,619 INFO L276 IsEmpty]: Start isEmpty. Operand 17027 states and 59286 transitions. [2021-06-05 07:03:46,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:03:46,641 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:46,641 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:03:46,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-05 07:03:46,845 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:46,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:46,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1172720400, now seen corresponding path program 114 times [2021-06-05 07:03:46,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:46,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284335150] [2021-06-05 07:03:46,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:46,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:46,895 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:03:46,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:46,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284335150] [2021-06-05 07:03:46,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284335150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:46,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436210734] [2021-06-05 07:03:46,895 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:46,920 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 07:03:46,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:46,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:03:46,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:47,048 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:47,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436210734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:47,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:47,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-05 07:03:47,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845485570] [2021-06-05 07:03:47,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 07:03:47,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:47,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 07:03:47,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-06-05 07:03:47,049 INFO L87 Difference]: Start difference. First operand 17027 states and 59286 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 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 07:03:47,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:47,838 INFO L93 Difference]: Finished difference Result 36359 states and 121507 transitions. [2021-06-05 07:03:47,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 07:03:47,838 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 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 36 [2021-06-05 07:03:47,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:47,904 INFO L225 Difference]: With dead ends: 36359 [2021-06-05 07:03:47,904 INFO L226 Difference]: Without dead ends: 36359 [2021-06-05 07:03:47,905 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 385.2ms TimeCoverageRelationStatistics Valid=568, Invalid=1784, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:03:47,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36359 states. [2021-06-05 07:03:48,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36359 to 17013. [2021-06-05 07:03:48,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17013 states, 17012 states have (on average 3.477251351986833) internal successors, (59155), 17012 states have internal predecessors, (59155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:48,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17013 states to 17013 states and 59155 transitions. [2021-06-05 07:03:48,354 INFO L78 Accepts]: Start accepts. Automaton has 17013 states and 59155 transitions. Word has length 36 [2021-06-05 07:03:48,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:48,354 INFO L482 AbstractCegarLoop]: Abstraction has 17013 states and 59155 transitions. [2021-06-05 07:03:48,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 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 07:03:48,354 INFO L276 IsEmpty]: Start isEmpty. Operand 17013 states and 59155 transitions. [2021-06-05 07:03:48,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:03:48,377 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:48,377 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:03:48,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-05 07:03:48,577 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:48,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:48,577 INFO L82 PathProgramCache]: Analyzing trace with hash -248629260, now seen corresponding path program 115 times [2021-06-05 07:03:48,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:48,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938153818] [2021-06-05 07:03:48,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:48,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:48,626 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:03:48,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:48,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938153818] [2021-06-05 07:03:48,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938153818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:48,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330108577] [2021-06-05 07:03:48,627 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:48,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:48,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:03:48,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:48,787 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:48,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330108577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:48,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:48,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-05 07:03:48,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21138554] [2021-06-05 07:03:48,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:03:48,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:48,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:03:48,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:03:48,788 INFO L87 Difference]: Start difference. First operand 17013 states and 59155 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 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 07:03:49,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:49,899 INFO L93 Difference]: Finished difference Result 37754 states and 124912 transitions. [2021-06-05 07:03:49,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 07:03:49,899 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 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 07:03:49,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:49,962 INFO L225 Difference]: With dead ends: 37754 [2021-06-05 07:03:49,962 INFO L226 Difference]: Without dead ends: 37754 [2021-06-05 07:03:49,962 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1251 ImplicationChecksByTransitivity, 543.5ms TimeCoverageRelationStatistics Valid=910, Invalid=2996, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 07:03:49,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37754 states. [2021-06-05 07:03:50,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37754 to 17024. [2021-06-05 07:03:50,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17024 states, 17023 states have (on average 3.4766492392645243) internal successors, (59183), 17023 states have internal predecessors, (59183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:50,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17024 states to 17024 states and 59183 transitions. [2021-06-05 07:03:50,406 INFO L78 Accepts]: Start accepts. Automaton has 17024 states and 59183 transitions. Word has length 36 [2021-06-05 07:03:50,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:50,406 INFO L482 AbstractCegarLoop]: Abstraction has 17024 states and 59183 transitions. [2021-06-05 07:03:50,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 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 07:03:50,407 INFO L276 IsEmpty]: Start isEmpty. Operand 17024 states and 59183 transitions. [2021-06-05 07:03:50,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:03:50,429 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:50,429 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:03:50,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-05 07:03:50,629 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:50,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:50,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1447944180, now seen corresponding path program 116 times [2021-06-05 07:03:50,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:50,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835435228] [2021-06-05 07:03:50,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:50,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:50,680 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:03:50,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:50,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835435228] [2021-06-05 07:03:50,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835435228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:50,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086734166] [2021-06-05 07:03:50,680 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:50,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:03:50,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:50,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:03:50,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:50,854 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:03:50,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086734166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:50,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:50,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 07:03:50,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689580329] [2021-06-05 07:03:50,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:03:50,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:50,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:03:50,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:03:50,855 INFO L87 Difference]: Start difference. First operand 17024 states and 59183 transitions. Second operand has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 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 07:03:51,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:51,946 INFO L93 Difference]: Finished difference Result 37846 states and 125454 transitions. [2021-06-05 07:03:51,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 07:03:51,946 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 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 36 [2021-06-05 07:03:51,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:52,012 INFO L225 Difference]: With dead ends: 37846 [2021-06-05 07:03:52,012 INFO L226 Difference]: Without dead ends: 37846 [2021-06-05 07:03:52,012 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1308 ImplicationChecksByTransitivity, 571.7ms TimeCoverageRelationStatistics Valid=959, Invalid=3073, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 07:03:52,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37846 states. [2021-06-05 07:03:52,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37846 to 17016. [2021-06-05 07:03:52,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17016 states, 17015 states have (on average 3.4787540405524537) internal successors, (59191), 17015 states have internal predecessors, (59191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:52,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17016 states to 17016 states and 59191 transitions. [2021-06-05 07:03:52,463 INFO L78 Accepts]: Start accepts. Automaton has 17016 states and 59191 transitions. Word has length 36 [2021-06-05 07:03:52,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:52,463 INFO L482 AbstractCegarLoop]: Abstraction has 17016 states and 59191 transitions. [2021-06-05 07:03:52,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 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 07:03:52,463 INFO L276 IsEmpty]: Start isEmpty. Operand 17016 states and 59191 transitions. [2021-06-05 07:03:52,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:03:52,485 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:52,485 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:03:52,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 07:03:52,686 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:52,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:52,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1463404976, now seen corresponding path program 117 times [2021-06-05 07:03:52,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:52,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461273396] [2021-06-05 07:03:52,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:52,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:52,736 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:03:52,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:52,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461273396] [2021-06-05 07:03:52,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461273396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:52,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018883318] [2021-06-05 07:03:52,736 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:52,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:03:52,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:52,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 07:03:52,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:52,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-05 07:03:52,862 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:52,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:03:52,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 07:03:52,872 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:30 [2021-06-05 07:03:53,036 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-06-05 07:03:53,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 07:03:53,037 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:53,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:03:53,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 07:03:53,049 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:42 [2021-06-05 07:03:53,107 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-06-05 07:03:53,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2021-06-05 07:03:53,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:03:53,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:03:53,126 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 07:03:53,126 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:55, output treesize:54 [2021-06-05 07:03:53,289 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 07:03:53,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018883318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:53,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:53,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-06-05 07:03:53,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354344259] [2021-06-05 07:03:53,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 07:03:53,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:53,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 07:03:53,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:03:53,290 INFO L87 Difference]: Start difference. First operand 17016 states and 59191 transitions. Second operand has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:56,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:56,561 INFO L93 Difference]: Finished difference Result 29934 states and 99159 transitions. [2021-06-05 07:03:56,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 07:03:56,562 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have 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 07:03:56,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:03:56,614 INFO L225 Difference]: With dead ends: 29934 [2021-06-05 07:03:56,614 INFO L226 Difference]: Without dead ends: 29934 [2021-06-05 07:03:56,615 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3260 ImplicationChecksByTransitivity, 2211.0ms TimeCoverageRelationStatistics Valid=1800, Invalid=8300, Unknown=0, NotChecked=0, Total=10100 [2021-06-05 07:03:56,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29934 states. [2021-06-05 07:03:56,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29934 to 17104. [2021-06-05 07:03:56,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17104 states, 17103 states have (on average 3.484067122727007) internal successors, (59588), 17103 states have internal predecessors, (59588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:56,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17104 states to 17104 states and 59588 transitions. [2021-06-05 07:03:56,996 INFO L78 Accepts]: Start accepts. Automaton has 17104 states and 59588 transitions. Word has length 36 [2021-06-05 07:03:56,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:03:56,996 INFO L482 AbstractCegarLoop]: Abstraction has 17104 states and 59588 transitions. [2021-06-05 07:03:56,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:03:56,996 INFO L276 IsEmpty]: Start isEmpty. Operand 17104 states and 59588 transitions. [2021-06-05 07:03:57,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:03:57,019 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:03:57,019 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:03:57,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:57,219 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:03:57,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:03:57,220 INFO L82 PathProgramCache]: Analyzing trace with hash -784175790, now seen corresponding path program 118 times [2021-06-05 07:03:57,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:03:57,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942227731] [2021-06-05 07:03:57,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:03:57,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:03:57,265 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:03:57,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:03:57,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942227731] [2021-06-05 07:03:57,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942227731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:57,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768167882] [2021-06-05 07:03:57,265 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:03:57,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:03:57,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:03:57,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:03:57,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:03:57,425 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:03:57,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768167882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:03:57,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:03:57,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 07:03:57,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340436745] [2021-06-05 07:03:57,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:03:57,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:03:57,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:03:57,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:03:57,426 INFO L87 Difference]: Start difference. First operand 17104 states and 59588 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 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 07:03:59,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:03:59,948 INFO L93 Difference]: Finished difference Result 36789 states and 120419 transitions. [2021-06-05 07:03:59,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-06-05 07:03:59,948 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 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 07:03:59,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:00,012 INFO L225 Difference]: With dead ends: 36789 [2021-06-05 07:04:00,013 INFO L226 Difference]: Without dead ends: 36789 [2021-06-05 07:04:00,014 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7472 ImplicationChecksByTransitivity, 1674.0ms TimeCoverageRelationStatistics Valid=3298, Invalid=15608, Unknown=0, NotChecked=0, Total=18906 [2021-06-05 07:04:00,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36789 states. [2021-06-05 07:04:00,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36789 to 17371. [2021-06-05 07:04:00,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17371 states, 17370 states have (on average 3.482153137593552) internal successors, (60485), 17370 states have internal predecessors, (60485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:00,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17371 states to 17371 states and 60485 transitions. [2021-06-05 07:04:00,463 INFO L78 Accepts]: Start accepts. Automaton has 17371 states and 60485 transitions. Word has length 36 [2021-06-05 07:04:00,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:00,463 INFO L482 AbstractCegarLoop]: Abstraction has 17371 states and 60485 transitions. [2021-06-05 07:04:00,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 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 07:04:00,463 INFO L276 IsEmpty]: Start isEmpty. Operand 17371 states and 60485 transitions. [2021-06-05 07:04:00,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:04:00,486 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:00,486 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:04:00,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-06-05 07:04:00,686 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:00,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:00,686 INFO L82 PathProgramCache]: Analyzing trace with hash -265224148, now seen corresponding path program 119 times [2021-06-05 07:04:00,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:00,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750812990] [2021-06-05 07:04:00,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:00,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:00,738 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:00,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:00,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750812990] [2021-06-05 07:04:00,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750812990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:00,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153891605] [2021-06-05 07:04:00,738 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:00,765 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 07:04:00,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:00,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:04:00,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:00,871 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:00,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153891605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:00,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:00,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 07:04:00,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937205851] [2021-06-05 07:04:00,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:04:00,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:00,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:04:00,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:04:00,872 INFO L87 Difference]: Start difference. First operand 17371 states and 60485 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 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 07:04:02,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:02,440 INFO L93 Difference]: Finished difference Result 34245 states and 114443 transitions. [2021-06-05 07:04:02,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-06-05 07:04:02,440 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 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 36 [2021-06-05 07:04:02,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:02,501 INFO L225 Difference]: With dead ends: 34245 [2021-06-05 07:04:02,501 INFO L226 Difference]: Without dead ends: 34173 [2021-06-05 07:04:02,502 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3600 ImplicationChecksByTransitivity, 1014.3ms TimeCoverageRelationStatistics Valid=2064, Invalid=7836, Unknown=0, NotChecked=0, Total=9900 [2021-06-05 07:04:02,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34173 states. [2021-06-05 07:04:02,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34173 to 16919. [2021-06-05 07:04:02,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16919 states, 16918 states have (on average 3.4816763210781416) internal successors, (58903), 16918 states have internal predecessors, (58903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:02,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16919 states to 16919 states and 58903 transitions. [2021-06-05 07:04:02,962 INFO L78 Accepts]: Start accepts. Automaton has 16919 states and 58903 transitions. Word has length 36 [2021-06-05 07:04:02,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:02,962 INFO L482 AbstractCegarLoop]: Abstraction has 16919 states and 58903 transitions. [2021-06-05 07:04:02,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 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 07:04:02,962 INFO L276 IsEmpty]: Start isEmpty. Operand 16919 states and 58903 transitions. [2021-06-05 07:04:02,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:04:02,985 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:02,985 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:04:03,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-06-05 07:04:03,186 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:03,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:03,186 INFO L82 PathProgramCache]: Analyzing trace with hash -907070356, now seen corresponding path program 120 times [2021-06-05 07:04:03,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:03,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811509081] [2021-06-05 07:04:03,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:03,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:03,243 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:03,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:03,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811509081] [2021-06-05 07:04:03,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811509081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:03,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214556957] [2021-06-05 07:04:03,244 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:03,270 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 07:04:03,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:03,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:04:03,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:03,375 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:04:03,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214556957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:03,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:03,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-05 07:04:03,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071046989] [2021-06-05 07:04:03,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 07:04:03,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:03,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 07:04:03,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-06-05 07:04:03,376 INFO L87 Difference]: Start difference. First operand 16919 states and 58903 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 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 07:04:05,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:05,132 INFO L93 Difference]: Finished difference Result 34016 states and 113681 transitions. [2021-06-05 07:04:05,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-06-05 07:04:05,133 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 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 36 [2021-06-05 07:04:05,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:05,193 INFO L225 Difference]: With dead ends: 34016 [2021-06-05 07:04:05,194 INFO L226 Difference]: Without dead ends: 33956 [2021-06-05 07:04:05,195 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4457 ImplicationChecksByTransitivity, 1111.8ms TimeCoverageRelationStatistics Valid=2358, Invalid=9852, Unknown=0, NotChecked=0, Total=12210 [2021-06-05 07:04:05,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33956 states. [2021-06-05 07:04:05,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33956 to 16875. [2021-06-05 07:04:05,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16875 states, 16874 states have (on average 3.4836434751688987) internal successors, (58783), 16874 states have internal predecessors, (58783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:05,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16875 states to 16875 states and 58783 transitions. [2021-06-05 07:04:05,606 INFO L78 Accepts]: Start accepts. Automaton has 16875 states and 58783 transitions. Word has length 36 [2021-06-05 07:04:05,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:05,606 INFO L482 AbstractCegarLoop]: Abstraction has 16875 states and 58783 transitions. [2021-06-05 07:04:05,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 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 07:04:05,606 INFO L276 IsEmpty]: Start isEmpty. Operand 16875 states and 58783 transitions. [2021-06-05 07:04:05,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:04:05,628 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:05,628 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:04:05,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:05,828 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:05,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:05,829 INFO L82 PathProgramCache]: Analyzing trace with hash -719103608, now seen corresponding path program 121 times [2021-06-05 07:04:05,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:05,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973971493] [2021-06-05 07:04:05,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:05,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:05,882 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:05,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:05,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973971493] [2021-06-05 07:04:05,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973971493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:05,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770122798] [2021-06-05 07:04:05,882 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:05,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:05,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:04:05,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:06,042 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:04:06,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770122798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:06,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:06,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 07:04:06,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276665505] [2021-06-05 07:04:06,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:04:06,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:06,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:04:06,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:04:06,043 INFO L87 Difference]: Start difference. First operand 16875 states and 58783 transitions. Second operand has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 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 07:04:07,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:07,096 INFO L93 Difference]: Finished difference Result 38582 states and 129677 transitions. [2021-06-05 07:04:07,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 07:04:07,096 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 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 36 [2021-06-05 07:04:07,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:07,163 INFO L225 Difference]: With dead ends: 38582 [2021-06-05 07:04:07,163 INFO L226 Difference]: Without dead ends: 38582 [2021-06-05 07:04:07,163 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1240 ImplicationChecksByTransitivity, 609.4ms TimeCoverageRelationStatistics Valid=922, Invalid=3110, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 07:04:07,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38582 states. [2021-06-05 07:04:07,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38582 to 17496. [2021-06-05 07:04:07,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17496 states, 17495 states have (on average 3.5108316661903403) internal successors, (61422), 17495 states have internal predecessors, (61422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:07,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17496 states to 17496 states and 61422 transitions. [2021-06-05 07:04:07,640 INFO L78 Accepts]: Start accepts. Automaton has 17496 states and 61422 transitions. Word has length 36 [2021-06-05 07:04:07,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:07,640 INFO L482 AbstractCegarLoop]: Abstraction has 17496 states and 61422 transitions. [2021-06-05 07:04:07,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 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 07:04:07,640 INFO L276 IsEmpty]: Start isEmpty. Operand 17496 states and 61422 transitions. [2021-06-05 07:04:07,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:04:07,662 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:07,662 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:04:07,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:07,863 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:07,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:07,863 INFO L82 PathProgramCache]: Analyzing trace with hash -703642812, now seen corresponding path program 122 times [2021-06-05 07:04:07,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:07,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521269408] [2021-06-05 07:04:07,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:07,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:07,916 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:07,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:07,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521269408] [2021-06-05 07:04:07,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521269408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:07,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154874416] [2021-06-05 07:04:07,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:07,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:04:07,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:07,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:04:07,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:08,079 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:04:08,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154874416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:08,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:08,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 07:04:08,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862960304] [2021-06-05 07:04:08,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:04:08,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:08,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:04:08,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:04:08,080 INFO L87 Difference]: Start difference. First operand 17496 states and 61422 transitions. Second operand has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 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 07:04:09,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:09,285 INFO L93 Difference]: Finished difference Result 39068 states and 130518 transitions. [2021-06-05 07:04:09,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 07:04:09,285 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 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 36 [2021-06-05 07:04:09,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:09,354 INFO L225 Difference]: With dead ends: 39068 [2021-06-05 07:04:09,354 INFO L226 Difference]: Without dead ends: 39068 [2021-06-05 07:04:09,355 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1579 ImplicationChecksByTransitivity, 632.8ms TimeCoverageRelationStatistics Valid=1170, Invalid=3660, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 07:04:09,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39068 states. [2021-06-05 07:04:09,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39068 to 17040. [2021-06-05 07:04:09,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17040 states, 17039 states have (on average 3.4929866776219263) internal successors, (59517), 17039 states have internal predecessors, (59517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:09,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17040 states to 17040 states and 59517 transitions. [2021-06-05 07:04:09,831 INFO L78 Accepts]: Start accepts. Automaton has 17040 states and 59517 transitions. Word has length 36 [2021-06-05 07:04:09,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:09,831 INFO L482 AbstractCegarLoop]: Abstraction has 17040 states and 59517 transitions. [2021-06-05 07:04:09,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 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 07:04:09,831 INFO L276 IsEmpty]: Start isEmpty. Operand 17040 states and 59517 transitions. [2021-06-05 07:04:09,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:04:09,853 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:09,853 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:04:10,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:10,053 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:10,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:10,053 INFO L82 PathProgramCache]: Analyzing trace with hash 444490688, now seen corresponding path program 123 times [2021-06-05 07:04:10,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:10,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782685778] [2021-06-05 07:04:10,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:10,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:10,106 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:10,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:10,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782685778] [2021-06-05 07:04:10,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782685778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:10,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319724530] [2021-06-05 07:04:10,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:10,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 07:04:10,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:10,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:04:10,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:10,349 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:04:10,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319724530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:10,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:10,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 07:04:10,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808059644] [2021-06-05 07:04:10,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:04:10,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:10,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:04:10,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:04:10,350 INFO L87 Difference]: Start difference. First operand 17040 states and 59517 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 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 07:04:11,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:11,196 INFO L93 Difference]: Finished difference Result 35719 states and 119509 transitions. [2021-06-05 07:04:11,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 07:04:11,197 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 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 07:04:11,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:11,259 INFO L225 Difference]: With dead ends: 35719 [2021-06-05 07:04:11,259 INFO L226 Difference]: Without dead ends: 35719 [2021-06-05 07:04:11,260 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 454.3ms TimeCoverageRelationStatistics Valid=703, Invalid=2377, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 07:04:11,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35719 states. [2021-06-05 07:04:11,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35719 to 16855. [2021-06-05 07:04:11,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16855 states, 16854 states have (on average 3.483683398599739) internal successors, (58714), 16854 states have internal predecessors, (58714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:11,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16855 states to 16855 states and 58714 transitions. [2021-06-05 07:04:11,698 INFO L78 Accepts]: Start accepts. Automaton has 16855 states and 58714 transitions. Word has length 36 [2021-06-05 07:04:11,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:11,698 INFO L482 AbstractCegarLoop]: Abstraction has 16855 states and 58714 transitions. [2021-06-05 07:04:11,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 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 07:04:11,699 INFO L276 IsEmpty]: Start isEmpty. Operand 16855 states and 58714 transitions. [2021-06-05 07:04:11,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:04:11,720 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:11,720 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:04:11,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:11,920 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:11,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:11,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1078249612, now seen corresponding path program 124 times [2021-06-05 07:04:11,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:11,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749999627] [2021-06-05 07:04:11,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:11,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:11,967 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:11,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:11,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749999627] [2021-06-05 07:04:11,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749999627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:11,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090974360] [2021-06-05 07:04:11,967 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:11,990 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:04:11,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:11,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:04:11,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:12,116 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:04:12,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090974360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:12,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:12,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 07:04:12,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837233004] [2021-06-05 07:04:12,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 07:04:12,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:12,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 07:04:12,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-06-05 07:04:12,117 INFO L87 Difference]: Start difference. First operand 16855 states and 58714 transitions. Second operand has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 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 07:04:12,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:12,783 INFO L93 Difference]: Finished difference Result 34570 states and 115444 transitions. [2021-06-05 07:04:12,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 07:04:12,783 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 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 07:04:12,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:12,842 INFO L225 Difference]: With dead ends: 34570 [2021-06-05 07:04:12,842 INFO L226 Difference]: Without dead ends: 34570 [2021-06-05 07:04:12,842 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 377.3ms TimeCoverageRelationStatistics Valid=555, Invalid=1797, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:04:12,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34570 states. [2021-06-05 07:04:13,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34570 to 16873. [2021-06-05 07:04:13,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16873 states, 16872 states have (on average 3.4834637268847795) internal successors, (58773), 16872 states have internal predecessors, (58773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:13,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16873 states to 16873 states and 58773 transitions. [2021-06-05 07:04:13,266 INFO L78 Accepts]: Start accepts. Automaton has 16873 states and 58773 transitions. Word has length 36 [2021-06-05 07:04:13,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:13,266 INFO L482 AbstractCegarLoop]: Abstraction has 16873 states and 58773 transitions. [2021-06-05 07:04:13,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 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 07:04:13,266 INFO L276 IsEmpty]: Start isEmpty. Operand 16873 states and 58773 transitions. [2021-06-05 07:04:13,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:04:13,287 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:13,287 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:04:13,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-06-05 07:04:13,488 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:13,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:13,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1249008814, now seen corresponding path program 125 times [2021-06-05 07:04:13,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:13,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259764135] [2021-06-05 07:04:13,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:13,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:13,535 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:13,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:13,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259764135] [2021-06-05 07:04:13,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259764135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:13,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671942465] [2021-06-05 07:04:13,535 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:13,561 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 07:04:13,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:13,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:04:13,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:13,684 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:04:13,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671942465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:13,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:13,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-05 07:04:13,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177572526] [2021-06-05 07:04:13,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:04:13,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:13,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:04:13,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:04:13,685 INFO L87 Difference]: Start difference. First operand 16873 states and 58773 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 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 07:04:15,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:15,610 INFO L93 Difference]: Finished difference Result 36187 states and 119134 transitions. [2021-06-05 07:04:15,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-06-05 07:04:15,611 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 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 07:04:15,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:15,671 INFO L225 Difference]: With dead ends: 36187 [2021-06-05 07:04:15,671 INFO L226 Difference]: Without dead ends: 36183 [2021-06-05 07:04:15,673 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4706 ImplicationChecksByTransitivity, 1177.5ms TimeCoverageRelationStatistics Valid=2270, Invalid=10612, Unknown=0, NotChecked=0, Total=12882 [2021-06-05 07:04:15,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36183 states. [2021-06-05 07:04:16,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36183 to 17057. [2021-06-05 07:04:16,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17057 states, 17056 states have (on average 3.480593339587242) internal successors, (59365), 17056 states have internal predecessors, (59365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:16,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17057 states to 17057 states and 59365 transitions. [2021-06-05 07:04:16,099 INFO L78 Accepts]: Start accepts. Automaton has 17057 states and 59365 transitions. Word has length 36 [2021-06-05 07:04:16,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:16,099 INFO L482 AbstractCegarLoop]: Abstraction has 17057 states and 59365 transitions. [2021-06-05 07:04:16,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 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 07:04:16,099 INFO L276 IsEmpty]: Start isEmpty. Operand 17057 states and 59365 transitions. [2021-06-05 07:04:16,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:04:16,121 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:16,121 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:04:16,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:16,321 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:16,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:16,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1793730568, now seen corresponding path program 126 times [2021-06-05 07:04:16,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:16,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386110093] [2021-06-05 07:04:16,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:16,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:16,367 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:16,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:16,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386110093] [2021-06-05 07:04:16,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386110093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:16,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657153063] [2021-06-05 07:04:16,368 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:16,391 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 07:04:16,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:16,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:04:16,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:16,510 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 07:04:16,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657153063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:16,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:16,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-06-05 07:04:16,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596244311] [2021-06-05 07:04:16,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 07:04:16,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:16,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 07:04:16,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-06-05 07:04:16,511 INFO L87 Difference]: Start difference. First operand 17057 states and 59365 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 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 07:04:18,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:18,588 INFO L93 Difference]: Finished difference Result 38126 states and 127134 transitions. [2021-06-05 07:04:18,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-06-05 07:04:18,589 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 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 36 [2021-06-05 07:04:18,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:18,651 INFO L225 Difference]: With dead ends: 38126 [2021-06-05 07:04:18,651 INFO L226 Difference]: Without dead ends: 38126 [2021-06-05 07:04:18,652 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5730 ImplicationChecksByTransitivity, 1341.1ms TimeCoverageRelationStatistics Valid=2664, Invalid=11856, Unknown=0, NotChecked=0, Total=14520 [2021-06-05 07:04:18,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38126 states. [2021-06-05 07:04:19,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38126 to 17565. [2021-06-05 07:04:19,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17565 states, 17564 states have (on average 3.4988613072193124) internal successors, (61454), 17564 states have internal predecessors, (61454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:19,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17565 states to 17565 states and 61454 transitions. [2021-06-05 07:04:19,094 INFO L78 Accepts]: Start accepts. Automaton has 17565 states and 61454 transitions. Word has length 36 [2021-06-05 07:04:19,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:19,094 INFO L482 AbstractCegarLoop]: Abstraction has 17565 states and 61454 transitions. [2021-06-05 07:04:19,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 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 07:04:19,094 INFO L276 IsEmpty]: Start isEmpty. Operand 17565 states and 61454 transitions. [2021-06-05 07:04:19,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:04:19,116 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:19,116 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:04:19,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-05 07:04:19,316 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:19,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:19,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1809191364, now seen corresponding path program 127 times [2021-06-05 07:04:19,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:19,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659351566] [2021-06-05 07:04:19,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:19,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:19,362 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:19,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:19,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659351566] [2021-06-05 07:04:19,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659351566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:19,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813636575] [2021-06-05 07:04:19,362 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:19,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:19,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:04:19,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:19,520 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:04:19,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813636575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:19,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:19,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-06-05 07:04:19,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813230769] [2021-06-05 07:04:19,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 07:04:19,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:19,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 07:04:19,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 07:04:19,521 INFO L87 Difference]: Start difference. First operand 17565 states and 61454 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 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 07:04:20,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:20,337 INFO L93 Difference]: Finished difference Result 35670 states and 119988 transitions. [2021-06-05 07:04:20,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 07:04:20,337 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 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 36 [2021-06-05 07:04:20,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:20,399 INFO L225 Difference]: With dead ends: 35670 [2021-06-05 07:04:20,399 INFO L226 Difference]: Without dead ends: 35670 [2021-06-05 07:04:20,399 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 925 ImplicationChecksByTransitivity, 429.3ms TimeCoverageRelationStatistics Valid=748, Invalid=2222, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 07:04:20,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35670 states. [2021-06-05 07:04:20,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35670 to 17384. [2021-06-05 07:04:20,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17384 states, 17383 states have (on average 3.49122706092159) internal successors, (60688), 17383 states have internal predecessors, (60688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:20,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17384 states to 17384 states and 60688 transitions. [2021-06-05 07:04:20,855 INFO L78 Accepts]: Start accepts. Automaton has 17384 states and 60688 transitions. Word has length 36 [2021-06-05 07:04:20,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:20,855 INFO L482 AbstractCegarLoop]: Abstraction has 17384 states and 60688 transitions. [2021-06-05 07:04:20,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 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 07:04:20,855 INFO L276 IsEmpty]: Start isEmpty. Operand 17384 states and 60688 transitions. [2021-06-05 07:04:20,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:04:20,877 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:20,877 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:04:21,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-05 07:04:21,077 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:21,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:21,077 INFO L82 PathProgramCache]: Analyzing trace with hash -530582264, now seen corresponding path program 128 times [2021-06-05 07:04:21,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:21,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787370204] [2021-06-05 07:04:21,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:21,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:21,134 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:21,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:21,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787370204] [2021-06-05 07:04:21,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787370204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:21,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031443220] [2021-06-05 07:04:21,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:21,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:04:21,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:21,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:04:21,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:21,296 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:04:21,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031443220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:21,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:21,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-06-05 07:04:21,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315628521] [2021-06-05 07:04:21,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:04:21,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:21,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:04:21,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:04:21,297 INFO L87 Difference]: Start difference. First operand 17384 states and 60688 transitions. Second operand has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:24,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:24,351 INFO L93 Difference]: Finished difference Result 54535 states and 178905 transitions. [2021-06-05 07:04:24,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2021-06-05 07:04:24,352 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have 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 07:04:24,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:24,458 INFO L225 Difference]: With dead ends: 54535 [2021-06-05 07:04:24,459 INFO L226 Difference]: Without dead ends: 54535 [2021-06-05 07:04:24,461 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12884 ImplicationChecksByTransitivity, 2237.1ms TimeCoverageRelationStatistics Valid=5153, Invalid=24603, Unknown=0, NotChecked=0, Total=29756 [2021-06-05 07:04:24,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54535 states. [2021-06-05 07:04:25,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54535 to 23450. [2021-06-05 07:04:25,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23450 states, 23449 states have (on average 3.4936671073393324) internal successors, (81923), 23449 states have internal predecessors, (81923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:25,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23450 states to 23450 states and 81923 transitions. [2021-06-05 07:04:25,136 INFO L78 Accepts]: Start accepts. Automaton has 23450 states and 81923 transitions. Word has length 36 [2021-06-05 07:04:25,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:25,136 INFO L482 AbstractCegarLoop]: Abstraction has 23450 states and 81923 transitions. [2021-06-05 07:04:25,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:25,136 INFO L276 IsEmpty]: Start isEmpty. Operand 23450 states and 81923 transitions. [2021-06-05 07:04:25,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:04:25,165 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:25,165 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:04:25,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-06-05 07:04:25,366 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:25,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:25,366 INFO L82 PathProgramCache]: Analyzing trace with hash 2079713946, now seen corresponding path program 129 times [2021-06-05 07:04:25,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:25,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680313391] [2021-06-05 07:04:25,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:25,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:25,423 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:25,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:25,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680313391] [2021-06-05 07:04:25,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680313391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:25,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848281904] [2021-06-05 07:04:25,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:25,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:04:25,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:25,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 07:04:25,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:25,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 07:04:25,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:04:25,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:04:25,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:04:25,582 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 07:04:25,629 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-06-05 07:04:25,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2021-06-05 07:04:25,630 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:04:25,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:04:25,636 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:04:25,636 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-06-05 07:04:25,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:04:25,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:04:25,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:04:25,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 36 [2021-06-05 07:04:25,687 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:04:25,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:04:25,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 07:04:25,698 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:47 [2021-06-05 07:04:25,785 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 07:04:25,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848281904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:25,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:25,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-06-05 07:04:25,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230840252] [2021-06-05 07:04:25,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 07:04:25,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:25,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 07:04:25,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:04:25,786 INFO L87 Difference]: Start difference. First operand 23450 states and 81923 transitions. Second operand has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:28,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:28,644 INFO L93 Difference]: Finished difference Result 43833 states and 145969 transitions. [2021-06-05 07:04:28,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-06-05 07:04:28,644 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have 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 07:04:28,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:28,727 INFO L225 Difference]: With dead ends: 43833 [2021-06-05 07:04:28,727 INFO L226 Difference]: Without dead ends: 43801 [2021-06-05 07:04:28,729 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6349 ImplicationChecksByTransitivity, 2158.5ms TimeCoverageRelationStatistics Valid=2492, Invalid=14278, Unknown=0, NotChecked=0, Total=16770 [2021-06-05 07:04:28,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43801 states. [2021-06-05 07:04:29,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43801 to 24220. [2021-06-05 07:04:29,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24220 states, 24219 states have (on average 3.4956852058301333) internal successors, (84662), 24219 states have internal predecessors, (84662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:29,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24220 states to 24220 states and 84662 transitions. [2021-06-05 07:04:29,306 INFO L78 Accepts]: Start accepts. Automaton has 24220 states and 84662 transitions. Word has length 36 [2021-06-05 07:04:29,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:29,306 INFO L482 AbstractCegarLoop]: Abstraction has 24220 states and 84662 transitions. [2021-06-05 07:04:29,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:29,307 INFO L276 IsEmpty]: Start isEmpty. Operand 24220 states and 84662 transitions. [2021-06-05 07:04:29,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:04:29,337 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:29,337 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:04:29,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:29,537 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:29,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:29,537 INFO L82 PathProgramCache]: Analyzing trace with hash -408762388, now seen corresponding path program 130 times [2021-06-05 07:04:29,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:29,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096337268] [2021-06-05 07:04:29,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:29,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:29,578 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:29,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:29,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096337268] [2021-06-05 07:04:29,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096337268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:29,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847207284] [2021-06-05 07:04:29,578 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:29,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:04:29,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:29,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:04:29,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:29,720 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:04:29,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847207284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:29,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:29,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 07:04:29,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930428191] [2021-06-05 07:04:29,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:04:29,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:29,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:04:29,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:04:29,721 INFO L87 Difference]: Start difference. First operand 24220 states and 84662 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 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 07:04:31,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:31,916 INFO L93 Difference]: Finished difference Result 58769 states and 199442 transitions. [2021-06-05 07:04:31,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2021-06-05 07:04:31,916 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 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 07:04:31,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:32,032 INFO L225 Difference]: With dead ends: 58769 [2021-06-05 07:04:32,032 INFO L226 Difference]: Without dead ends: 58705 [2021-06-05 07:04:32,033 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6795 ImplicationChecksByTransitivity, 1484.7ms TimeCoverageRelationStatistics Valid=2796, Invalid=13716, Unknown=0, NotChecked=0, Total=16512 [2021-06-05 07:04:32,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58705 states. [2021-06-05 07:04:32,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58705 to 25245. [2021-06-05 07:04:32,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25245 states, 25244 states have (on average 3.517627951196324) internal successors, (88799), 25244 states have internal predecessors, (88799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:32,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25245 states to 25245 states and 88799 transitions. [2021-06-05 07:04:32,800 INFO L78 Accepts]: Start accepts. Automaton has 25245 states and 88799 transitions. Word has length 36 [2021-06-05 07:04:32,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:32,800 INFO L482 AbstractCegarLoop]: Abstraction has 25245 states and 88799 transitions. [2021-06-05 07:04:32,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 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 07:04:32,801 INFO L276 IsEmpty]: Start isEmpty. Operand 25245 states and 88799 transitions. [2021-06-05 07:04:32,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:04:32,831 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:32,831 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:04:33,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-06-05 07:04:33,032 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:33,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:33,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1347426568, now seen corresponding path program 131 times [2021-06-05 07:04:33,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:33,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727213169] [2021-06-05 07:04:33,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:33,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:33,074 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:33,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:33,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727213169] [2021-06-05 07:04:33,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727213169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:33,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997231916] [2021-06-05 07:04:33,075 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:33,099 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 07:04:33,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:33,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:04:33,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:33,238 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:33,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997231916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:33,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:33,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-06-05 07:04:33,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294587832] [2021-06-05 07:04:33,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:04:33,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:33,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:04:33,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:04:33,239 INFO L87 Difference]: Start difference. First operand 25245 states and 88799 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 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 07:04:33,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:33,923 INFO L93 Difference]: Finished difference Result 57930 states and 199300 transitions. [2021-06-05 07:04:33,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 07:04:33,924 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 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 07:04:33,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:34,162 INFO L225 Difference]: With dead ends: 57930 [2021-06-05 07:04:34,163 INFO L226 Difference]: Without dead ends: 57930 [2021-06-05 07:04:34,163 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 284.8ms TimeCoverageRelationStatistics Valid=401, Invalid=1081, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 07:04:34,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57930 states. [2021-06-05 07:04:34,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57930 to 26000. [2021-06-05 07:04:34,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26000 states, 25999 states have (on average 3.5369821916227546) internal successors, (91958), 25999 states have internal predecessors, (91958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:34,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26000 states to 26000 states and 91958 transitions. [2021-06-05 07:04:34,867 INFO L78 Accepts]: Start accepts. Automaton has 26000 states and 91958 transitions. Word has length 36 [2021-06-05 07:04:34,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:34,867 INFO L482 AbstractCegarLoop]: Abstraction has 26000 states and 91958 transitions. [2021-06-05 07:04:34,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 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 07:04:34,867 INFO L276 IsEmpty]: Start isEmpty. Operand 26000 states and 91958 transitions. [2021-06-05 07:04:34,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:04:34,897 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:34,897 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:04:35,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:35,101 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:35,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:35,101 INFO L82 PathProgramCache]: Analyzing trace with hash 339853380, now seen corresponding path program 132 times [2021-06-05 07:04:35,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:35,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377556730] [2021-06-05 07:04:35,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:35,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:35,141 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:35,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:35,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377556730] [2021-06-05 07:04:35,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377556730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:35,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205055246] [2021-06-05 07:04:35,141 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:35,164 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 07:04:35,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:35,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:04:35,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:35,293 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:04:35,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205055246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:35,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:35,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 07:04:35,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117720919] [2021-06-05 07:04:35,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:04:35,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:35,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:04:35,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:04:35,294 INFO L87 Difference]: Start difference. First operand 26000 states and 91958 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 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 07:04:37,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:37,442 INFO L93 Difference]: Finished difference Result 60488 states and 206164 transitions. [2021-06-05 07:04:37,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-06-05 07:04:37,442 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 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 36 [2021-06-05 07:04:37,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:37,697 INFO L225 Difference]: With dead ends: 60488 [2021-06-05 07:04:37,697 INFO L226 Difference]: Without dead ends: 60488 [2021-06-05 07:04:37,698 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6645 ImplicationChecksByTransitivity, 1405.8ms TimeCoverageRelationStatistics Valid=3256, Invalid=12746, Unknown=0, NotChecked=0, Total=16002 [2021-06-05 07:04:37,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60488 states. [2021-06-05 07:04:38,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60488 to 26680. [2021-06-05 07:04:38,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26680 states, 26679 states have (on average 3.5661756437647587) internal successors, (95142), 26679 states have internal predecessors, (95142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:38,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26680 states to 26680 states and 95142 transitions. [2021-06-05 07:04:38,450 INFO L78 Accepts]: Start accepts. Automaton has 26680 states and 95142 transitions. Word has length 36 [2021-06-05 07:04:38,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:38,450 INFO L482 AbstractCegarLoop]: Abstraction has 26680 states and 95142 transitions. [2021-06-05 07:04:38,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 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 07:04:38,451 INFO L276 IsEmpty]: Start isEmpty. Operand 26680 states and 95142 transitions. [2021-06-05 07:04:38,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:04:38,487 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:38,487 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:04:38,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:38,688 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:38,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:38,688 INFO L82 PathProgramCache]: Analyzing trace with hash -710764454, now seen corresponding path program 133 times [2021-06-05 07:04:38,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:38,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985495252] [2021-06-05 07:04:38,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:38,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:38,735 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:38,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:38,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985495252] [2021-06-05 07:04:38,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985495252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:38,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248178913] [2021-06-05 07:04:38,735 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:38,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:38,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:04:38,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:38,874 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:04:38,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248178913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:38,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:38,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 07:04:38,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915721536] [2021-06-05 07:04:38,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:04:38,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:38,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:04:38,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:04:38,875 INFO L87 Difference]: Start difference. First operand 26680 states and 95142 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 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 07:04:40,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:40,199 INFO L93 Difference]: Finished difference Result 57569 states and 197823 transitions. [2021-06-05 07:04:40,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-05 07:04:40,199 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 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 07:04:40,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:40,316 INFO L225 Difference]: With dead ends: 57569 [2021-06-05 07:04:40,316 INFO L226 Difference]: Without dead ends: 57521 [2021-06-05 07:04:40,317 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2543 ImplicationChecksByTransitivity, 738.2ms TimeCoverageRelationStatistics Valid=1427, Invalid=5379, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 07:04:40,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57521 states. [2021-06-05 07:04:41,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57521 to 26690. [2021-06-05 07:04:41,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26690 states, 26689 states have (on average 3.5660009741841208) internal successors, (95173), 26689 states have internal predecessors, (95173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:41,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26690 states to 26690 states and 95173 transitions. [2021-06-05 07:04:41,173 INFO L78 Accepts]: Start accepts. Automaton has 26690 states and 95173 transitions. Word has length 36 [2021-06-05 07:04:41,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:41,173 INFO L482 AbstractCegarLoop]: Abstraction has 26690 states and 95173 transitions. [2021-06-05 07:04:41,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 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 07:04:41,173 INFO L276 IsEmpty]: Start isEmpty. Operand 26690 states and 95173 transitions. [2021-06-05 07:04:41,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:04:41,209 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:41,209 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:04:41,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable164 [2021-06-05 07:04:41,410 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:41,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:41,410 INFO L82 PathProgramCache]: Analyzing trace with hash 329516758, now seen corresponding path program 134 times [2021-06-05 07:04:41,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:41,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465914741] [2021-06-05 07:04:41,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:41,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:41,450 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:41,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:41,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465914741] [2021-06-05 07:04:41,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465914741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:41,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287391082] [2021-06-05 07:04:41,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:41,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:04:41,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:41,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:04:41,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:41,588 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:41,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287391082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:41,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:41,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-05 07:04:41,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791884618] [2021-06-05 07:04:41,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:04:41,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:41,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:04:41,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:04:41,589 INFO L87 Difference]: Start difference. First operand 26690 states and 95173 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 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 07:04:42,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:42,292 INFO L93 Difference]: Finished difference Result 57984 states and 198618 transitions. [2021-06-05 07:04:42,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 07:04:42,293 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 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 36 [2021-06-05 07:04:42,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:42,408 INFO L225 Difference]: With dead ends: 57984 [2021-06-05 07:04:42,409 INFO L226 Difference]: Without dead ends: 57984 [2021-06-05 07:04:42,409 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 295.8ms TimeCoverageRelationStatistics Valid=474, Invalid=1248, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 07:04:42,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57984 states. [2021-06-05 07:04:43,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57984 to 27762. [2021-06-05 07:04:43,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27762 states, 27761 states have (on average 3.5949353409459315) internal successors, (99799), 27761 states have internal predecessors, (99799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:43,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27762 states to 27762 states and 99799 transitions. [2021-06-05 07:04:43,364 INFO L78 Accepts]: Start accepts. Automaton has 27762 states and 99799 transitions. Word has length 36 [2021-06-05 07:04:43,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:43,364 INFO L482 AbstractCegarLoop]: Abstraction has 27762 states and 99799 transitions. [2021-06-05 07:04:43,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 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 07:04:43,365 INFO L276 IsEmpty]: Start isEmpty. Operand 27762 states and 99799 transitions. [2021-06-05 07:04:43,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:04:43,402 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:43,402 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:04:43,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:43,603 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:43,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:43,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1122382768, now seen corresponding path program 135 times [2021-06-05 07:04:43,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:43,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551625542] [2021-06-05 07:04:43,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:43,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:43,645 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:04:43,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:43,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551625542] [2021-06-05 07:04:43,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551625542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:43,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988725935] [2021-06-05 07:04:43,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:43,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:04:43,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:43,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:04:43,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:43,773 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:43,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988725935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:43,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:43,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 18 [2021-06-05 07:04:43,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056247538] [2021-06-05 07:04:43,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:04:43,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:43,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:04:43,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:04:43,774 INFO L87 Difference]: Start difference. First operand 27762 states and 99799 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 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 07:04:44,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:44,729 INFO L93 Difference]: Finished difference Result 54138 states and 184921 transitions. [2021-06-05 07:04:44,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 07:04:44,729 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 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 36 [2021-06-05 07:04:44,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:44,836 INFO L225 Difference]: With dead ends: 54138 [2021-06-05 07:04:44,836 INFO L226 Difference]: Without dead ends: 54066 [2021-06-05 07:04:44,837 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1412 ImplicationChecksByTransitivity, 532.3ms TimeCoverageRelationStatistics Valid=855, Invalid=3435, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 07:04:44,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54066 states. [2021-06-05 07:04:45,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54066 to 27784. [2021-06-05 07:04:45,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27784 states, 27783 states have (on average 3.5943562610229276) internal successors, (99862), 27783 states have internal predecessors, (99862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:45,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27784 states to 27784 states and 99862 transitions. [2021-06-05 07:04:45,872 INFO L78 Accepts]: Start accepts. Automaton has 27784 states and 99862 transitions. Word has length 36 [2021-06-05 07:04:45,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:45,872 INFO L482 AbstractCegarLoop]: Abstraction has 27784 states and 99862 transitions. [2021-06-05 07:04:45,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 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 07:04:45,872 INFO L276 IsEmpty]: Start isEmpty. Operand 27784 states and 99862 transitions. [2021-06-05 07:04:45,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:04:45,912 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:45,912 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:04:46,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:46,120 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:46,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:46,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1700283596, now seen corresponding path program 136 times [2021-06-05 07:04:46,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:46,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30059028] [2021-06-05 07:04:46,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:46,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:46,245 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:04:46,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:46,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30059028] [2021-06-05 07:04:46,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30059028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:46,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072108994] [2021-06-05 07:04:46,245 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:46,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:04:46,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:46,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:04:46,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:46,378 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:04:46,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072108994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:46,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:46,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 07:04:46,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243203471] [2021-06-05 07:04:46,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:04:46,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:46,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:04:46,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:04:46,379 INFO L87 Difference]: Start difference. First operand 27784 states and 99862 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 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 07:04:48,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:48,227 INFO L93 Difference]: Finished difference Result 59804 states and 200815 transitions. [2021-06-05 07:04:48,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-06-05 07:04:48,229 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 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 07:04:48,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:48,350 INFO L225 Difference]: With dead ends: 59804 [2021-06-05 07:04:48,350 INFO L226 Difference]: Without dead ends: 59804 [2021-06-05 07:04:48,351 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5826 ImplicationChecksByTransitivity, 1294.4ms TimeCoverageRelationStatistics Valid=2466, Invalid=11576, Unknown=0, NotChecked=0, Total=14042 [2021-06-05 07:04:48,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59804 states. [2021-06-05 07:04:49,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59804 to 27938. [2021-06-05 07:04:49,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27938 states, 27937 states have (on average 3.5910441350180764) internal successors, (100323), 27937 states have internal predecessors, (100323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:49,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27938 states to 27938 states and 100323 transitions. [2021-06-05 07:04:49,309 INFO L78 Accepts]: Start accepts. Automaton has 27938 states and 100323 transitions. Word has length 36 [2021-06-05 07:04:49,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:49,309 INFO L482 AbstractCegarLoop]: Abstraction has 27938 states and 100323 transitions. [2021-06-05 07:04:49,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 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 07:04:49,309 INFO L276 IsEmpty]: Start isEmpty. Operand 27938 states and 100323 transitions. [2021-06-05 07:04:49,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:04:49,349 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:49,349 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:04:49,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-06-05 07:04:49,549 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:49,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:49,549 INFO L82 PathProgramCache]: Analyzing trace with hash -2038937164, now seen corresponding path program 137 times [2021-06-05 07:04:49,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:49,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551056351] [2021-06-05 07:04:49,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:49,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:49,611 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:49,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:49,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551056351] [2021-06-05 07:04:49,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551056351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:49,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742274623] [2021-06-05 07:04:49,611 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:49,638 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 07:04:49,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:49,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:04:49,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:49,749 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:49,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742274623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:49,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:49,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 18 [2021-06-05 07:04:49,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290416778] [2021-06-05 07:04:49,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:04:49,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:49,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:04:49,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:04:49,750 INFO L87 Difference]: Start difference. First operand 27938 states and 100323 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 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 07:04:51,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:51,082 INFO L93 Difference]: Finished difference Result 55738 states and 189163 transitions. [2021-06-05 07:04:51,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 07:04:51,082 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 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 36 [2021-06-05 07:04:51,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:51,190 INFO L225 Difference]: With dead ends: 55738 [2021-06-05 07:04:51,190 INFO L226 Difference]: Without dead ends: 55594 [2021-06-05 07:04:51,191 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2045 ImplicationChecksByTransitivity, 817.9ms TimeCoverageRelationStatistics Valid=1122, Invalid=4884, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 07:04:51,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55594 states. [2021-06-05 07:04:51,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55594 to 27966. [2021-06-05 07:04:51,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27966 states, 27965 states have (on average 3.5902377972465582) internal successors, (100401), 27965 states have internal predecessors, (100401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:52,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27966 states to 27966 states and 100401 transitions. [2021-06-05 07:04:52,021 INFO L78 Accepts]: Start accepts. Automaton has 27966 states and 100401 transitions. Word has length 36 [2021-06-05 07:04:52,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:52,021 INFO L482 AbstractCegarLoop]: Abstraction has 27966 states and 100401 transitions. [2021-06-05 07:04:52,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 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 07:04:52,022 INFO L276 IsEmpty]: Start isEmpty. Operand 27966 states and 100401 transitions. [2021-06-05 07:04:52,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:04:52,060 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:52,060 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:04:52,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-06-05 07:04:52,261 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:52,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:52,261 INFO L82 PathProgramCache]: Analyzing trace with hash -201981896, now seen corresponding path program 138 times [2021-06-05 07:04:52,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:52,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002103797] [2021-06-05 07:04:52,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:52,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:52,308 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:52,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:52,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002103797] [2021-06-05 07:04:52,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002103797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:52,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156794985] [2021-06-05 07:04:52,308 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:52,333 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 07:04:52,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:52,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:04:52,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:52,438 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:04:52,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156794985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:52,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:52,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 07:04:52,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377246518] [2021-06-05 07:04:52,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:04:52,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:52,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:04:52,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:04:52,439 INFO L87 Difference]: Start difference. First operand 27966 states and 100401 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 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 07:04:54,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:54,182 INFO L93 Difference]: Finished difference Result 58306 states and 196728 transitions. [2021-06-05 07:04:54,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-06-05 07:04:54,182 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 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 36 [2021-06-05 07:04:54,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:54,299 INFO L225 Difference]: With dead ends: 58306 [2021-06-05 07:04:54,299 INFO L226 Difference]: Without dead ends: 58238 [2021-06-05 07:04:54,299 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3796 ImplicationChecksByTransitivity, 980.0ms TimeCoverageRelationStatistics Valid=1816, Invalid=7886, Unknown=0, NotChecked=0, Total=9702 [2021-06-05 07:04:54,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58238 states. [2021-06-05 07:04:55,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58238 to 28222. [2021-06-05 07:04:55,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28222 states, 28221 states have (on average 3.5836788207363313) internal successors, (101135), 28221 states have internal predecessors, (101135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:55,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28222 states to 28222 states and 101135 transitions. [2021-06-05 07:04:55,164 INFO L78 Accepts]: Start accepts. Automaton has 28222 states and 101135 transitions. Word has length 36 [2021-06-05 07:04:55,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:55,164 INFO L482 AbstractCegarLoop]: Abstraction has 28222 states and 101135 transitions. [2021-06-05 07:04:55,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 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 07:04:55,164 INFO L276 IsEmpty]: Start isEmpty. Operand 28222 states and 101135 transitions. [2021-06-05 07:04:55,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:04:55,353 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:55,353 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:04:55,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-05 07:04:55,553 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:55,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:55,554 INFO L82 PathProgramCache]: Analyzing trace with hash 838299316, now seen corresponding path program 139 times [2021-06-05 07:04:55,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:55,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579371617] [2021-06-05 07:04:55,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:55,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:55,602 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:55,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:55,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579371617] [2021-06-05 07:04:55,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579371617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:55,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148346120] [2021-06-05 07:04:55,602 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:55,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:55,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:04:55,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:55,723 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:55,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148346120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:55,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:55,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 18 [2021-06-05 07:04:55,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54601548] [2021-06-05 07:04:55,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:04:55,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:55,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:04:55,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:04:55,724 INFO L87 Difference]: Start difference. First operand 28222 states and 101135 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 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 07:04:56,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:56,790 INFO L93 Difference]: Finished difference Result 58747 states and 196828 transitions. [2021-06-05 07:04:56,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 07:04:56,791 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 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 36 [2021-06-05 07:04:56,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:56,916 INFO L225 Difference]: With dead ends: 58747 [2021-06-05 07:04:56,916 INFO L226 Difference]: Without dead ends: 58747 [2021-06-05 07:04:56,917 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1353 ImplicationChecksByTransitivity, 587.5ms TimeCoverageRelationStatistics Valid=896, Invalid=2886, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 07:04:56,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58747 states. [2021-06-05 07:04:57,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58747 to 28292. [2021-06-05 07:04:57,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28292 states, 28291 states have (on average 3.583259693895585) internal successors, (101374), 28291 states have internal predecessors, (101374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:04:57,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28292 states to 28292 states and 101374 transitions. [2021-06-05 07:04:57,884 INFO L78 Accepts]: Start accepts. Automaton has 28292 states and 101374 transitions. Word has length 36 [2021-06-05 07:04:57,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:04:57,884 INFO L482 AbstractCegarLoop]: Abstraction has 28292 states and 101374 transitions. [2021-06-05 07:04:57,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 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 07:04:57,885 INFO L276 IsEmpty]: Start isEmpty. Operand 28292 states and 101374 transitions. [2021-06-05 07:04:57,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:04:57,922 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:04:57,922 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:04:58,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:58,123 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:04:58,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:04:58,123 INFO L82 PathProgramCache]: Analyzing trace with hash 769453752, now seen corresponding path program 140 times [2021-06-05 07:04:58,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:04:58,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454465306] [2021-06-05 07:04:58,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:04:58,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:04:58,178 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:04:58,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:04:58,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454465306] [2021-06-05 07:04:58,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454465306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:58,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621896437] [2021-06-05 07:04:58,179 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:04:58,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:04:58,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:04:58,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:04:58,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:04:58,286 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:04:58,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621896437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:04:58,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:04:58,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 18 [2021-06-05 07:04:58,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410601577] [2021-06-05 07:04:58,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:04:58,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:04:58,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:04:58,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:04:58,287 INFO L87 Difference]: Start difference. First operand 28292 states and 101374 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 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 07:04:59,059 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-06-05 07:04:59,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:04:59,767 INFO L93 Difference]: Finished difference Result 58143 states and 196081 transitions. [2021-06-05 07:04:59,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-06-05 07:04:59,767 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 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 36 [2021-06-05 07:04:59,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:04:59,882 INFO L225 Difference]: With dead ends: 58143 [2021-06-05 07:04:59,882 INFO L226 Difference]: Without dead ends: 57927 [2021-06-05 07:04:59,883 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3120 ImplicationChecksByTransitivity, 969.6ms TimeCoverageRelationStatistics Valid=1531, Invalid=7211, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 07:05:00,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57927 states. [2021-06-05 07:05:00,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57927 to 28406. [2021-06-05 07:05:00,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28406 states, 28405 states have (on average 3.5803907762717833) internal successors, (101701), 28405 states have internal predecessors, (101701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:00,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28406 states to 28406 states and 101701 transitions. [2021-06-05 07:05:00,884 INFO L78 Accepts]: Start accepts. Automaton has 28406 states and 101701 transitions. Word has length 36 [2021-06-05 07:05:00,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:00,884 INFO L482 AbstractCegarLoop]: Abstraction has 28406 states and 101701 transitions. [2021-06-05 07:05:00,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 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 07:05:00,884 INFO L276 IsEmpty]: Start isEmpty. Operand 28406 states and 101701 transitions. [2021-06-05 07:05:00,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:05:00,921 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:00,921 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:05:01,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-06-05 07:05:01,122 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:01,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:01,122 INFO L82 PathProgramCache]: Analyzing trace with hash 851907644, now seen corresponding path program 141 times [2021-06-05 07:05:01,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:01,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491030299] [2021-06-05 07:05:01,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:01,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:01,176 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:01,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:01,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491030299] [2021-06-05 07:05:01,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491030299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:01,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203711609] [2021-06-05 07:05:01,177 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:01,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 07:05:01,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:01,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:05:01,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:01,286 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:01,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203711609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:01,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:01,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-06-05 07:05:01,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480396811] [2021-06-05 07:05:01,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:05:01,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:01,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:05:01,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:05:01,287 INFO L87 Difference]: Start difference. First operand 28406 states and 101701 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 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 07:05:02,078 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 13 [2021-06-05 07:05:02,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:02,932 INFO L93 Difference]: Finished difference Result 56244 states and 191794 transitions. [2021-06-05 07:05:02,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-06-05 07:05:02,932 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 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 36 [2021-06-05 07:05:02,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:03,053 INFO L225 Difference]: With dead ends: 56244 [2021-06-05 07:05:03,053 INFO L226 Difference]: Without dead ends: 56088 [2021-06-05 07:05:03,053 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3741 ImplicationChecksByTransitivity, 1072.9ms TimeCoverageRelationStatistics Valid=1746, Invalid=8154, Unknown=0, NotChecked=0, Total=9900 [2021-06-05 07:05:03,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56088 states. [2021-06-05 07:05:03,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56088 to 28858. [2021-06-05 07:05:03,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28858 states, 28857 states have (on average 3.5620819905049035) internal successors, (102791), 28857 states have internal predecessors, (102791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:04,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28858 states to 28858 states and 102791 transitions. [2021-06-05 07:05:04,000 INFO L78 Accepts]: Start accepts. Automaton has 28858 states and 102791 transitions. Word has length 36 [2021-06-05 07:05:04,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:04,000 INFO L482 AbstractCegarLoop]: Abstraction has 28858 states and 102791 transitions. [2021-06-05 07:05:04,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 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 07:05:04,000 INFO L276 IsEmpty]: Start isEmpty. Operand 28858 states and 102791 transitions. [2021-06-05 07:05:04,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:05:04,038 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:04,038 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:05:04,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:04,239 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:04,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:04,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1657232324, now seen corresponding path program 142 times [2021-06-05 07:05:04,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:04,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602772757] [2021-06-05 07:05:04,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:04,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:04,294 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:04,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:04,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602772757] [2021-06-05 07:05:04,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602772757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:04,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787448086] [2021-06-05 07:05:04,294 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:04,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:05:04,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:04,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:05:04,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:04,407 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:05:04,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787448086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:04,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:04,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-06-05 07:05:04,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079972062] [2021-06-05 07:05:04,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:05:04,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:04,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:05:04,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:05:04,407 INFO L87 Difference]: Start difference. First operand 28858 states and 102791 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 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 07:05:05,589 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-06-05 07:05:07,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:07,279 INFO L93 Difference]: Finished difference Result 62328 states and 208262 transitions. [2021-06-05 07:05:07,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2021-06-05 07:05:07,280 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 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 36 [2021-06-05 07:05:07,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:07,396 INFO L225 Difference]: With dead ends: 62328 [2021-06-05 07:05:07,396 INFO L226 Difference]: Without dead ends: 62328 [2021-06-05 07:05:07,397 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10889 ImplicationChecksByTransitivity, 1878.0ms TimeCoverageRelationStatistics Valid=4101, Invalid=20705, Unknown=0, NotChecked=0, Total=24806 [2021-06-05 07:05:07,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62328 states. [2021-06-05 07:05:08,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62328 to 31970. [2021-06-05 07:05:08,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31970 states, 31969 states have (on average 3.5039882386061496) internal successors, (112019), 31969 states have internal predecessors, (112019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:08,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31970 states to 31970 states and 112019 transitions. [2021-06-05 07:05:08,343 INFO L78 Accepts]: Start accepts. Automaton has 31970 states and 112019 transitions. Word has length 36 [2021-06-05 07:05:08,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:08,343 INFO L482 AbstractCegarLoop]: Abstraction has 31970 states and 112019 transitions. [2021-06-05 07:05:08,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 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 07:05:08,343 INFO L276 IsEmpty]: Start isEmpty. Operand 31970 states and 112019 transitions. [2021-06-05 07:05:08,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:05:08,384 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:08,384 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:05:08,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:08,585 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:08,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:08,585 INFO L82 PathProgramCache]: Analyzing trace with hash 894177490, now seen corresponding path program 143 times [2021-06-05 07:05:08,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:08,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856840275] [2021-06-05 07:05:08,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:08,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:08,633 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:08,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:08,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856840275] [2021-06-05 07:05:08,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856840275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:08,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349602227] [2021-06-05 07:05:08,634 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:08,659 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 07:05:08,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:08,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:05:08,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:08,775 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:05:08,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349602227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:08,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:08,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-06-05 07:05:08,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144741360] [2021-06-05 07:05:08,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 07:05:08,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:08,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 07:05:08,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-06-05 07:05:08,776 INFO L87 Difference]: Start difference. First operand 31970 states and 112019 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 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 07:05:10,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:10,317 INFO L93 Difference]: Finished difference Result 58961 states and 202100 transitions. [2021-06-05 07:05:10,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 07:05:10,317 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 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 07:05:10,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:10,434 INFO L225 Difference]: With dead ends: 58961 [2021-06-05 07:05:10,434 INFO L226 Difference]: Without dead ends: 58937 [2021-06-05 07:05:10,434 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2552 ImplicationChecksByTransitivity, 842.7ms TimeCoverageRelationStatistics Valid=1411, Invalid=5561, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 07:05:10,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58937 states. [2021-06-05 07:05:11,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58937 to 33178. [2021-06-05 07:05:11,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33178 states, 33177 states have (on average 3.5047774060343007) internal successors, (116278), 33177 states have internal predecessors, (116278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:11,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33178 states to 33178 states and 116278 transitions. [2021-06-05 07:05:11,439 INFO L78 Accepts]: Start accepts. Automaton has 33178 states and 116278 transitions. Word has length 36 [2021-06-05 07:05:11,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:11,440 INFO L482 AbstractCegarLoop]: Abstraction has 33178 states and 116278 transitions. [2021-06-05 07:05:11,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 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 07:05:11,440 INFO L276 IsEmpty]: Start isEmpty. Operand 33178 states and 116278 transitions. [2021-06-05 07:05:11,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:05:11,485 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:11,485 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:05:11,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:11,692 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:11,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:11,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1472010922, now seen corresponding path program 144 times [2021-06-05 07:05:11,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:11,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409561177] [2021-06-05 07:05:11,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:11,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:11,736 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:11,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:11,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409561177] [2021-06-05 07:05:11,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409561177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:11,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356400340] [2021-06-05 07:05:11,736 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:11,762 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 07:05:11,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:11,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:05:11,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:11,886 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:11,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356400340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:11,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:11,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 07:05:11,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853080635] [2021-06-05 07:05:11,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:05:11,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:11,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:05:11,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:05:11,887 INFO L87 Difference]: Start difference. First operand 33178 states and 116278 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 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 07:05:13,132 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-06-05 07:05:13,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:13,423 INFO L93 Difference]: Finished difference Result 61380 states and 207685 transitions. [2021-06-05 07:05:13,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 07:05:13,423 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 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 07:05:13,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:13,544 INFO L225 Difference]: With dead ends: 61380 [2021-06-05 07:05:13,544 INFO L226 Difference]: Without dead ends: 61356 [2021-06-05 07:05:13,545 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2596 ImplicationChecksByTransitivity, 959.7ms TimeCoverageRelationStatistics Valid=1508, Invalid=5464, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 07:05:13,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61356 states. [2021-06-05 07:05:14,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61356 to 33587. [2021-06-05 07:05:14,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33587 states, 33586 states have (on average 3.5085750014887154) internal successors, (117839), 33586 states have internal predecessors, (117839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:14,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33587 states to 33587 states and 117839 transitions. [2021-06-05 07:05:14,504 INFO L78 Accepts]: Start accepts. Automaton has 33587 states and 117839 transitions. Word has length 36 [2021-06-05 07:05:14,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:14,504 INFO L482 AbstractCegarLoop]: Abstraction has 33587 states and 117839 transitions. [2021-06-05 07:05:14,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 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 07:05:14,504 INFO L276 IsEmpty]: Start isEmpty. Operand 33587 states and 117839 transitions. [2021-06-05 07:05:14,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:05:14,685 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:14,685 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:05:14,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:14,906 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:14,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:14,906 INFO L82 PathProgramCache]: Analyzing trace with hash 44374, now seen corresponding path program 145 times [2021-06-05 07:05:14,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:14,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294958169] [2021-06-05 07:05:14,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:14,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:14,951 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:14,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:14,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294958169] [2021-06-05 07:05:14,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294958169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:14,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957703819] [2021-06-05 07:05:14,951 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:14,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:14,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:05:14,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:15,099 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:05:15,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957703819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:15,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:15,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 07:05:15,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507341709] [2021-06-05 07:05:15,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:05:15,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:15,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:05:15,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:05:15,100 INFO L87 Difference]: Start difference. First operand 33587 states and 117839 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 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 07:05:16,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:16,948 INFO L93 Difference]: Finished difference Result 68170 states and 230143 transitions. [2021-06-05 07:05:16,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-06-05 07:05:16,949 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 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 07:05:16,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:17,088 INFO L225 Difference]: With dead ends: 68170 [2021-06-05 07:05:17,089 INFO L226 Difference]: Without dead ends: 68134 [2021-06-05 07:05:17,089 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4640 ImplicationChecksByTransitivity, 1148.0ms TimeCoverageRelationStatistics Valid=2536, Invalid=9236, Unknown=0, NotChecked=0, Total=11772 [2021-06-05 07:05:17,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68134 states. [2021-06-05 07:05:17,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68134 to 33436. [2021-06-05 07:05:18,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33436 states, 33435 states have (on average 3.5040526394496783) internal successors, (117158), 33435 states have internal predecessors, (117158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:18,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33436 states to 33436 states and 117158 transitions. [2021-06-05 07:05:18,255 INFO L78 Accepts]: Start accepts. Automaton has 33436 states and 117158 transitions. Word has length 36 [2021-06-05 07:05:18,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:18,255 INFO L482 AbstractCegarLoop]: Abstraction has 33436 states and 117158 transitions. [2021-06-05 07:05:18,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 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 07:05:18,256 INFO L276 IsEmpty]: Start isEmpty. Operand 33436 states and 117158 transitions. [2021-06-05 07:05:18,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:05:18,304 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:18,304 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:05:18,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2021-06-05 07:05:18,505 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:18,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:18,505 INFO L82 PathProgramCache]: Analyzing trace with hash -988740176, now seen corresponding path program 146 times [2021-06-05 07:05:18,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:18,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108009662] [2021-06-05 07:05:18,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:18,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:18,566 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:18,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:18,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108009662] [2021-06-05 07:05:18,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108009662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:18,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887734253] [2021-06-05 07:05:18,567 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:18,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:05:18,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:18,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:05:18,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:18,720 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:05:18,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887734253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:18,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:18,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 07:05:18,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681169747] [2021-06-05 07:05:18,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:05:18,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:18,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:05:18,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:05:18,721 INFO L87 Difference]: Start difference. First operand 33436 states and 117158 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 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 07:05:20,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:20,418 INFO L93 Difference]: Finished difference Result 71028 states and 243828 transitions. [2021-06-05 07:05:20,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-05 07:05:20,419 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 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 07:05:20,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:20,565 INFO L225 Difference]: With dead ends: 71028 [2021-06-05 07:05:20,565 INFO L226 Difference]: Without dead ends: 70956 [2021-06-05 07:05:20,566 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3221 ImplicationChecksByTransitivity, 970.9ms TimeCoverageRelationStatistics Valid=1558, Invalid=7184, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 07:05:20,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70956 states. [2021-06-05 07:05:21,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70956 to 33879. [2021-06-05 07:05:21,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33879 states, 33878 states have (on average 3.507792667808017) internal successors, (118837), 33878 states have internal predecessors, (118837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:21,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33879 states to 33879 states and 118837 transitions. [2021-06-05 07:05:21,595 INFO L78 Accepts]: Start accepts. Automaton has 33879 states and 118837 transitions. Word has length 36 [2021-06-05 07:05:21,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:21,595 INFO L482 AbstractCegarLoop]: Abstraction has 33879 states and 118837 transitions. [2021-06-05 07:05:21,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 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 07:05:21,595 INFO L276 IsEmpty]: Start isEmpty. Operand 33879 states and 118837 transitions. [2021-06-05 07:05:21,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:05:21,640 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:21,640 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:05:21,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-06-05 07:05:21,841 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:21,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:21,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1272413260, now seen corresponding path program 147 times [2021-06-05 07:05:21,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:21,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327631399] [2021-06-05 07:05:21,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:21,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:21,896 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:21,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:21,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327631399] [2021-06-05 07:05:21,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327631399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:21,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249071767] [2021-06-05 07:05:21,896 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:22,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 07:05:22,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:22,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:05:22,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:22,177 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:22,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249071767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:22,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:22,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 07:05:22,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620994354] [2021-06-05 07:05:22,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 07:05:22,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:22,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 07:05:22,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-06-05 07:05:22,178 INFO L87 Difference]: Start difference. First operand 33879 states and 118837 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 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 07:05:23,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:23,799 INFO L93 Difference]: Finished difference Result 72468 states and 247783 transitions. [2021-06-05 07:05:23,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-06-05 07:05:23,799 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 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 36 [2021-06-05 07:05:23,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:23,947 INFO L225 Difference]: With dead ends: 72468 [2021-06-05 07:05:23,947 INFO L226 Difference]: Without dead ends: 72348 [2021-06-05 07:05:23,947 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3012 ImplicationChecksByTransitivity, 860.4ms TimeCoverageRelationStatistics Valid=1503, Invalid=6869, Unknown=0, NotChecked=0, Total=8372 [2021-06-05 07:05:24,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72348 states. [2021-06-05 07:05:24,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72348 to 36408. [2021-06-05 07:05:25,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36408 states, 36407 states have (on average 3.501606833850633) internal successors, (127483), 36407 states have internal predecessors, (127483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:25,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36408 states to 36408 states and 127483 transitions. [2021-06-05 07:05:25,110 INFO L78 Accepts]: Start accepts. Automaton has 36408 states and 127483 transitions. Word has length 36 [2021-06-05 07:05:25,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:25,110 INFO L482 AbstractCegarLoop]: Abstraction has 36408 states and 127483 transitions. [2021-06-05 07:05:25,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 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 07:05:25,110 INFO L276 IsEmpty]: Start isEmpty. Operand 36408 states and 127483 transitions. [2021-06-05 07:05:25,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:05:25,159 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:25,159 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:05:25,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-05 07:05:25,360 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:25,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:25,360 INFO L82 PathProgramCache]: Analyzing trace with hash 995659960, now seen corresponding path program 148 times [2021-06-05 07:05:25,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:25,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950118024] [2021-06-05 07:05:25,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:25,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:25,417 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:25,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:25,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950118024] [2021-06-05 07:05:25,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950118024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:25,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333542229] [2021-06-05 07:05:25,417 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:25,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:05:25,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:25,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:05:25,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:25,533 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:05:25,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333542229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:25,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:25,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-06-05 07:05:25,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827406060] [2021-06-05 07:05:25,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:05:25,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:25,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:05:25,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:05:25,534 INFO L87 Difference]: Start difference. First operand 36408 states and 127483 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 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 07:05:26,253 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 11 [2021-06-05 07:05:27,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:27,090 INFO L93 Difference]: Finished difference Result 71896 states and 245531 transitions. [2021-06-05 07:05:27,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 07:05:27,091 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 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 36 [2021-06-05 07:05:27,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:27,241 INFO L225 Difference]: With dead ends: 71896 [2021-06-05 07:05:27,242 INFO L226 Difference]: Without dead ends: 71728 [2021-06-05 07:05:27,242 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2683 ImplicationChecksByTransitivity, 977.2ms TimeCoverageRelationStatistics Valid=1382, Invalid=6274, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 07:05:27,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71728 states. [2021-06-05 07:05:28,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71728 to 37315. [2021-06-05 07:05:28,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37315 states, 37314 states have (on average 3.4974272391059658) internal successors, (130503), 37314 states have internal predecessors, (130503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:28,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37315 states to 37315 states and 130503 transitions. [2021-06-05 07:05:28,483 INFO L78 Accepts]: Start accepts. Automaton has 37315 states and 130503 transitions. Word has length 36 [2021-06-05 07:05:28,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:28,483 INFO L482 AbstractCegarLoop]: Abstraction has 37315 states and 130503 transitions. [2021-06-05 07:05:28,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 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 07:05:28,483 INFO L276 IsEmpty]: Start isEmpty. Operand 37315 states and 130503 transitions. [2021-06-05 07:05:28,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:05:28,535 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:28,535 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:05:28,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-05 07:05:28,735 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:28,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:28,736 INFO L82 PathProgramCache]: Analyzing trace with hash 652323388, now seen corresponding path program 149 times [2021-06-05 07:05:28,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:28,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024174136] [2021-06-05 07:05:28,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:28,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:28,785 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:28,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:28,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024174136] [2021-06-05 07:05:28,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024174136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:28,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638322647] [2021-06-05 07:05:28,785 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:28,813 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 07:05:28,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:28,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:05:28,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:28,933 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:28,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638322647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:28,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:28,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-05 07:05:28,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521616467] [2021-06-05 07:05:28,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:05:28,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:28,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:05:28,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:05:28,934 INFO L87 Difference]: Start difference. First operand 37315 states and 130503 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 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 07:05:30,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:30,886 INFO L93 Difference]: Finished difference Result 70630 states and 238604 transitions. [2021-06-05 07:05:30,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-06-05 07:05:30,887 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 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 36 [2021-06-05 07:05:30,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:31,030 INFO L225 Difference]: With dead ends: 70630 [2021-06-05 07:05:31,030 INFO L226 Difference]: Without dead ends: 70602 [2021-06-05 07:05:31,030 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4331 ImplicationChecksByTransitivity, 1218.8ms TimeCoverageRelationStatistics Valid=2360, Invalid=8770, Unknown=0, NotChecked=0, Total=11130 [2021-06-05 07:05:31,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70602 states. [2021-06-05 07:05:32,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70602 to 37553. [2021-06-05 07:05:32,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37553 states, 37552 states have (on average 3.4914518534299104) internal successors, (131111), 37552 states have internal predecessors, (131111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:32,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37553 states to 37553 states and 131111 transitions. [2021-06-05 07:05:32,206 INFO L78 Accepts]: Start accepts. Automaton has 37553 states and 131111 transitions. Word has length 36 [2021-06-05 07:05:32,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:32,206 INFO L482 AbstractCegarLoop]: Abstraction has 37553 states and 131111 transitions. [2021-06-05 07:05:32,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 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 07:05:32,206 INFO L276 IsEmpty]: Start isEmpty. Operand 37553 states and 131111 transitions. [2021-06-05 07:05:32,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:05:32,255 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:32,255 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:05:32,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:32,456 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:32,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:32,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1629303304, now seen corresponding path program 150 times [2021-06-05 07:05:32,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:32,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548299356] [2021-06-05 07:05:32,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:32,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:32,501 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:32,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:32,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548299356] [2021-06-05 07:05:32,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548299356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:32,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566718240] [2021-06-05 07:05:32,501 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:32,524 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:05:32,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:32,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:05:32,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:32,620 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:32,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566718240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:32,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:32,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 18 [2021-06-05 07:05:32,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328146778] [2021-06-05 07:05:32,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:05:32,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:32,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:05:32,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:05:32,621 INFO L87 Difference]: Start difference. First operand 37553 states and 131111 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 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 07:05:34,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:34,121 INFO L93 Difference]: Finished difference Result 64800 states and 219489 transitions. [2021-06-05 07:05:34,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 07:05:34,121 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 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 36 [2021-06-05 07:05:34,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:34,250 INFO L225 Difference]: With dead ends: 64800 [2021-06-05 07:05:34,250 INFO L226 Difference]: Without dead ends: 64752 [2021-06-05 07:05:34,251 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2640 ImplicationChecksByTransitivity, 778.7ms TimeCoverageRelationStatistics Valid=1456, Invalid=5854, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 07:05:34,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64752 states. [2021-06-05 07:05:35,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64752 to 38003. [2021-06-05 07:05:35,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38003 states, 38002 states have (on average 3.4817641176780167) internal successors, (132314), 38002 states have internal predecessors, (132314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:35,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38003 states to 38003 states and 132314 transitions. [2021-06-05 07:05:35,471 INFO L78 Accepts]: Start accepts. Automaton has 38003 states and 132314 transitions. Word has length 36 [2021-06-05 07:05:35,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:35,471 INFO L482 AbstractCegarLoop]: Abstraction has 38003 states and 132314 transitions. [2021-06-05 07:05:35,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 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 07:05:35,471 INFO L276 IsEmpty]: Start isEmpty. Operand 38003 states and 132314 transitions. [2021-06-05 07:05:35,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:05:35,525 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:35,525 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:05:35,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:35,733 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:35,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:35,733 INFO L82 PathProgramCache]: Analyzing trace with hash -971366648, now seen corresponding path program 151 times [2021-06-05 07:05:35,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:35,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171074783] [2021-06-05 07:05:35,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:35,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:35,786 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:35,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:35,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171074783] [2021-06-05 07:05:35,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171074783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:35,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715779794] [2021-06-05 07:05:35,786 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:35,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:35,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:05:35,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:35,903 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:05:35,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715779794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:35,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:35,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 07:05:35,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215866205] [2021-06-05 07:05:35,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:05:35,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:35,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:05:35,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:05:35,904 INFO L87 Difference]: Start difference. First operand 38003 states and 132314 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 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 07:05:37,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:37,065 INFO L93 Difference]: Finished difference Result 62672 states and 214949 transitions. [2021-06-05 07:05:37,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 07:05:37,226 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 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 36 [2021-06-05 07:05:37,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:37,360 INFO L225 Difference]: With dead ends: 62672 [2021-06-05 07:05:37,360 INFO L226 Difference]: Without dead ends: 62612 [2021-06-05 07:05:37,360 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1569 ImplicationChecksByTransitivity, 618.7ms TimeCoverageRelationStatistics Valid=939, Invalid=3891, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 07:05:37,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62612 states. [2021-06-05 07:05:38,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62612 to 38019. [2021-06-05 07:05:38,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38019 states, 38018 states have (on average 3.4814561523488874) internal successors, (132358), 38018 states have internal predecessors, (132358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:38,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38019 states to 38019 states and 132358 transitions. [2021-06-05 07:05:38,302 INFO L78 Accepts]: Start accepts. Automaton has 38019 states and 132358 transitions. Word has length 36 [2021-06-05 07:05:38,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:38,302 INFO L482 AbstractCegarLoop]: Abstraction has 38019 states and 132358 transitions. [2021-06-05 07:05:38,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 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 07:05:38,302 INFO L276 IsEmpty]: Start isEmpty. Operand 38019 states and 132358 transitions. [2021-06-05 07:05:38,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:05:38,352 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:38,352 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:05:38,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:38,559 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:38,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:38,560 INFO L82 PathProgramCache]: Analyzing trace with hash 613711262, now seen corresponding path program 152 times [2021-06-05 07:05:38,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:38,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447462590] [2021-06-05 07:05:38,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:38,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:38,607 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:38,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:38,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447462590] [2021-06-05 07:05:38,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447462590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:38,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083178822] [2021-06-05 07:05:38,607 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:38,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:05:38,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:38,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:05:38,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:38,703 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:05:38,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083178822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:38,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:38,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-06-05 07:05:38,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696175238] [2021-06-05 07:05:38,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:05:38,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:38,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:05:38,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:05:38,703 INFO L87 Difference]: Start difference. First operand 38019 states and 132358 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 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 07:05:40,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:40,166 INFO L93 Difference]: Finished difference Result 63919 states and 217939 transitions. [2021-06-05 07:05:40,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-06-05 07:05:40,166 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 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 36 [2021-06-05 07:05:40,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:40,295 INFO L225 Difference]: With dead ends: 63919 [2021-06-05 07:05:40,295 INFO L226 Difference]: Without dead ends: 63879 [2021-06-05 07:05:40,295 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3003 ImplicationChecksByTransitivity, 807.0ms TimeCoverageRelationStatistics Valid=1540, Invalid=6470, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 07:05:40,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63879 states. [2021-06-05 07:05:41,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63879 to 38411. [2021-06-05 07:05:41,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38411 states, 38410 states have (on average 3.478104660244728) internal successors, (133594), 38410 states have internal predecessors, (133594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:41,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38411 states to 38411 states and 133594 transitions. [2021-06-05 07:05:41,454 INFO L78 Accepts]: Start accepts. Automaton has 38411 states and 133594 transitions. Word has length 36 [2021-06-05 07:05:41,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:41,454 INFO L482 AbstractCegarLoop]: Abstraction has 38411 states and 133594 transitions. [2021-06-05 07:05:41,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 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 07:05:41,454 INFO L276 IsEmpty]: Start isEmpty. Operand 38411 states and 133594 transitions. [2021-06-05 07:05:41,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:05:41,502 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:41,502 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:05:41,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2021-06-05 07:05:41,702 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:41,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:41,702 INFO L82 PathProgramCache]: Analyzing trace with hash -544224248, now seen corresponding path program 153 times [2021-06-05 07:05:41,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:41,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875802737] [2021-06-05 07:05:41,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:41,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:41,917 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:41,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:41,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875802737] [2021-06-05 07:05:41,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875802737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:41,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522754352] [2021-06-05 07:05:41,918 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:41,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 07:05:41,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:41,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:05:41,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:42,017 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:42,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522754352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:42,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:42,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 17 [2021-06-05 07:05:42,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998611514] [2021-06-05 07:05:42,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:05:42,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:42,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:05:42,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:05:42,018 INFO L87 Difference]: Start difference. First operand 38411 states and 133594 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 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 07:05:43,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:43,412 INFO L93 Difference]: Finished difference Result 65073 states and 222032 transitions. [2021-06-05 07:05:43,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 07:05:43,412 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 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 36 [2021-06-05 07:05:43,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:43,710 INFO L225 Difference]: With dead ends: 65073 [2021-06-05 07:05:43,710 INFO L226 Difference]: Without dead ends: 64989 [2021-06-05 07:05:43,710 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2584 ImplicationChecksByTransitivity, 957.1ms TimeCoverageRelationStatistics Valid=1344, Invalid=6138, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 07:05:43,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64989 states. [2021-06-05 07:05:44,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64989 to 39127. [2021-06-05 07:05:44,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39127 states, 39126 states have (on average 3.468639779174973) internal successors, (135714), 39126 states have internal predecessors, (135714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:44,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39127 states to 39127 states and 135714 transitions. [2021-06-05 07:05:44,615 INFO L78 Accepts]: Start accepts. Automaton has 39127 states and 135714 transitions. Word has length 36 [2021-06-05 07:05:44,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:44,615 INFO L482 AbstractCegarLoop]: Abstraction has 39127 states and 135714 transitions. [2021-06-05 07:05:44,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 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 07:05:44,616 INFO L276 IsEmpty]: Start isEmpty. Operand 39127 states and 135714 transitions. [2021-06-05 07:05:44,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:05:44,664 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:44,664 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:05:44,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:44,865 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:44,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:44,865 INFO L82 PathProgramCache]: Analyzing trace with hash -93570350, now seen corresponding path program 154 times [2021-06-05 07:05:44,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:44,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285619741] [2021-06-05 07:05:44,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:44,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:44,904 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:44,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:44,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285619741] [2021-06-05 07:05:44,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285619741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:44,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962660248] [2021-06-05 07:05:44,905 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:44,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:05:44,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:44,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:05:44,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:45,056 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:45,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962660248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:45,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:45,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-05 07:05:45,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540388551] [2021-06-05 07:05:45,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 07:05:45,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:45,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 07:05:45,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2021-06-05 07:05:45,057 INFO L87 Difference]: Start difference. First operand 39127 states and 135714 transitions. Second operand has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 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 07:05:46,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:46,318 INFO L93 Difference]: Finished difference Result 102660 states and 349317 transitions. [2021-06-05 07:05:46,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 07:05:46,318 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 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 07:05:46,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:46,552 INFO L225 Difference]: With dead ends: 102660 [2021-06-05 07:05:46,553 INFO L226 Difference]: Without dead ends: 102660 [2021-06-05 07:05:46,553 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 452.8ms TimeCoverageRelationStatistics Valid=759, Invalid=1791, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 07:05:46,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102660 states. [2021-06-05 07:05:48,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102660 to 43208. [2021-06-05 07:05:48,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43208 states, 43207 states have (on average 3.5571550906103178) internal successors, (153694), 43207 states have internal predecessors, (153694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:48,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43208 states to 43208 states and 153694 transitions. [2021-06-05 07:05:48,476 INFO L78 Accepts]: Start accepts. Automaton has 43208 states and 153694 transitions. Word has length 36 [2021-06-05 07:05:48,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:48,476 INFO L482 AbstractCegarLoop]: Abstraction has 43208 states and 153694 transitions. [2021-06-05 07:05:48,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 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 07:05:48,476 INFO L276 IsEmpty]: Start isEmpty. Operand 43208 states and 153694 transitions. [2021-06-05 07:05:48,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:05:48,535 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:48,535 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:05:48,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:48,736 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:48,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:48,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1644681102, now seen corresponding path program 155 times [2021-06-05 07:05:48,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:48,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472178820] [2021-06-05 07:05:48,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:48,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:48,792 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:48,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:48,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472178820] [2021-06-05 07:05:48,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472178820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:48,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562837529] [2021-06-05 07:05:48,793 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:48,819 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 07:05:48,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:48,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:05:48,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:48,945 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:48,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562837529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:48,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:48,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 07:05:48,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22890882] [2021-06-05 07:05:48,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:05:48,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:48,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:05:48,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:05:48,946 INFO L87 Difference]: Start difference. First operand 43208 states and 153694 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 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 07:05:49,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:49,700 INFO L93 Difference]: Finished difference Result 55934 states and 195854 transitions. [2021-06-05 07:05:49,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 07:05:49,700 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 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 36 [2021-06-05 07:05:49,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:49,823 INFO L225 Difference]: With dead ends: 55934 [2021-06-05 07:05:49,823 INFO L226 Difference]: Without dead ends: 55934 [2021-06-05 07:05:49,824 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 302.8ms TimeCoverageRelationStatistics Valid=289, Invalid=833, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 07:05:49,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55934 states. [2021-06-05 07:05:50,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55934 to 44080. [2021-06-05 07:05:50,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44080 states, 44079 states have (on average 3.5467229292860547) internal successors, (156336), 44079 states have internal predecessors, (156336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:50,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44080 states to 44080 states and 156336 transitions. [2021-06-05 07:05:50,854 INFO L78 Accepts]: Start accepts. Automaton has 44080 states and 156336 transitions. Word has length 36 [2021-06-05 07:05:50,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:50,854 INFO L482 AbstractCegarLoop]: Abstraction has 44080 states and 156336 transitions. [2021-06-05 07:05:50,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 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 07:05:50,854 INFO L276 IsEmpty]: Start isEmpty. Operand 44080 states and 156336 transitions. [2021-06-05 07:05:50,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:05:50,909 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:50,909 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:05:51,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:51,110 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:51,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:51,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1465950898, now seen corresponding path program 156 times [2021-06-05 07:05:51,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:51,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927905740] [2021-06-05 07:05:51,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:51,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:51,154 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:51,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:51,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927905740] [2021-06-05 07:05:51,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927905740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:51,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888306816] [2021-06-05 07:05:51,154 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:51,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 07:05:51,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:51,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:05:51,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:51,296 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:51,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888306816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:51,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:51,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 07:05:51,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745868246] [2021-06-05 07:05:51,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:05:51,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:51,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:05:51,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:05:51,296 INFO L87 Difference]: Start difference. First operand 44080 states and 156336 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 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 07:05:51,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:51,718 INFO L93 Difference]: Finished difference Result 55590 states and 194951 transitions. [2021-06-05 07:05:51,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 07:05:51,718 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 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 07:05:51,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:51,829 INFO L225 Difference]: With dead ends: 55590 [2021-06-05 07:05:51,829 INFO L226 Difference]: Without dead ends: 55586 [2021-06-05 07:05:51,830 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 180.0ms TimeCoverageRelationStatistics Valid=158, Invalid=492, Unknown=0, NotChecked=0, Total=650 [2021-06-05 07:05:52,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55586 states. [2021-06-05 07:05:53,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55586 to 44002. [2021-06-05 07:05:53,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44002 states, 44001 states have (on average 3.5471693825140336) internal successors, (156079), 44001 states have internal predecessors, (156079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:53,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44002 states to 44002 states and 156079 transitions. [2021-06-05 07:05:53,298 INFO L78 Accepts]: Start accepts. Automaton has 44002 states and 156079 transitions. Word has length 36 [2021-06-05 07:05:53,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:53,298 INFO L482 AbstractCegarLoop]: Abstraction has 44002 states and 156079 transitions. [2021-06-05 07:05:53,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 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 07:05:53,298 INFO L276 IsEmpty]: Start isEmpty. Operand 44002 states and 156079 transitions. [2021-06-05 07:05:53,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:05:53,352 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:53,352 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:05:53,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:53,553 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:53,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:53,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1660404340, now seen corresponding path program 157 times [2021-06-05 07:05:53,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:53,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123964813] [2021-06-05 07:05:53,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:53,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:53,597 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:53,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:53,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123964813] [2021-06-05 07:05:53,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123964813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:53,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665244220] [2021-06-05 07:05:53,597 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:53,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:53,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:05:53,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:53,745 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:05:53,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665244220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:53,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:53,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 07:05:53,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058866933] [2021-06-05 07:05:53,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:05:53,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:53,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:05:53,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:05:53,745 INFO L87 Difference]: Start difference. First operand 44002 states and 156079 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 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 07:05:54,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:54,663 INFO L93 Difference]: Finished difference Result 55904 states and 195900 transitions. [2021-06-05 07:05:54,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 07:05:54,663 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 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 07:05:54,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:54,980 INFO L225 Difference]: With dead ends: 55904 [2021-06-05 07:05:54,980 INFO L226 Difference]: Without dead ends: 55888 [2021-06-05 07:05:54,981 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 769 ImplicationChecksByTransitivity, 529.1ms TimeCoverageRelationStatistics Valid=557, Invalid=2305, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 07:05:55,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55888 states. [2021-06-05 07:05:55,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55888 to 43876. [2021-06-05 07:05:55,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43876 states, 43875 states have (on average 3.5484900284900287) internal successors, (155690), 43875 states have internal predecessors, (155690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:55,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43876 states to 43876 states and 155690 transitions. [2021-06-05 07:05:55,938 INFO L78 Accepts]: Start accepts. Automaton has 43876 states and 155690 transitions. Word has length 36 [2021-06-05 07:05:55,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:55,938 INFO L482 AbstractCegarLoop]: Abstraction has 43876 states and 155690 transitions. [2021-06-05 07:05:55,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 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 07:05:55,938 INFO L276 IsEmpty]: Start isEmpty. Operand 43876 states and 155690 transitions. [2021-06-05 07:05:55,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:05:55,992 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:55,992 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:05:56,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2021-06-05 07:05:56,192 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:56,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:56,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1074676232, now seen corresponding path program 158 times [2021-06-05 07:05:56,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:56,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809137132] [2021-06-05 07:05:56,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:56,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:56,235 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:56,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:56,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809137132] [2021-06-05 07:05:56,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809137132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:56,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736513064] [2021-06-05 07:05:56,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:56,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:05:56,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:56,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:05:56,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:56,389 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:05:56,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736513064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:56,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:56,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-05 07:05:56,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545265241] [2021-06-05 07:05:56,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:05:56,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:56,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:05:56,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:05:56,390 INFO L87 Difference]: Start difference. First operand 43876 states and 155690 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 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 07:05:57,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:05:57,731 INFO L93 Difference]: Finished difference Result 62055 states and 216765 transitions. [2021-06-05 07:05:57,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 07:05:57,732 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 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 07:05:57,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:05:57,864 INFO L225 Difference]: With dead ends: 62055 [2021-06-05 07:05:57,865 INFO L226 Difference]: Without dead ends: 62043 [2021-06-05 07:05:57,865 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1301 ImplicationChecksByTransitivity, 675.1ms TimeCoverageRelationStatistics Valid=806, Invalid=3354, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 07:05:57,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62043 states. [2021-06-05 07:05:58,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62043 to 43875. [2021-06-05 07:05:59,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43875 states, 43874 states have (on average 3.55356247435839) internal successors, (155909), 43874 states have internal predecessors, (155909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:05:59,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43875 states to 43875 states and 155909 transitions. [2021-06-05 07:05:59,111 INFO L78 Accepts]: Start accepts. Automaton has 43875 states and 155909 transitions. Word has length 36 [2021-06-05 07:05:59,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:05:59,111 INFO L482 AbstractCegarLoop]: Abstraction has 43875 states and 155909 transitions. [2021-06-05 07:05:59,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 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 07:05:59,111 INFO L276 IsEmpty]: Start isEmpty. Operand 43875 states and 155909 transitions. [2021-06-05 07:05:59,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:05:59,166 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:05:59,166 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:05:59,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:59,366 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:05:59,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:05:59,367 INFO L82 PathProgramCache]: Analyzing trace with hash -208960008, now seen corresponding path program 159 times [2021-06-05 07:05:59,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:05:59,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629548009] [2021-06-05 07:05:59,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:05:59,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:05:59,413 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:05:59,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:05:59,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629548009] [2021-06-05 07:05:59,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629548009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:59,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275822113] [2021-06-05 07:05:59,413 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:05:59,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:05:59,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:05:59,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 07:05:59,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:05:59,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-05 07:05:59,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:59,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:59,538 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 07:05:59,538 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:27 [2021-06-05 07:05:59,574 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-06-05 07:05:59,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 07:05:59,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:59,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:59,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 07:05:59,587 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:39 [2021-06-05 07:05:59,660 INFO L354 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2021-06-05 07:05:59,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 32 [2021-06-05 07:05:59,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:59,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:59,674 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 07:05:59,674 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:45 [2021-06-05 07:05:59,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:05:59,758 INFO L354 Elim1Store]: treesize reduction 60, result has 15.5 percent of original size [2021-06-05 07:05:59,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 42 [2021-06-05 07:05:59,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:05:59,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:05:59,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 07:05:59,776 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:61, output treesize:60 [2021-06-05 07:05:59,919 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:05:59,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275822113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:05:59,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:05:59,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 25 [2021-06-05 07:05:59,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593066341] [2021-06-05 07:05:59,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 07:05:59,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:05:59,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 07:05:59,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:05:59,920 INFO L87 Difference]: Start difference. First operand 43875 states and 155909 transitions. Second operand has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:03,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:03,080 INFO L93 Difference]: Finished difference Result 63737 states and 220306 transitions. [2021-06-05 07:06:03,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-06-05 07:06:03,080 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have 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 07:06:03,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:03,362 INFO L225 Difference]: With dead ends: 63737 [2021-06-05 07:06:03,362 INFO L226 Difference]: Without dead ends: 63678 [2021-06-05 07:06:03,362 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5115 ImplicationChecksByTransitivity, 2032.2ms TimeCoverageRelationStatistics Valid=1602, Invalid=12204, Unknown=0, NotChecked=0, Total=13806 [2021-06-05 07:06:03,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63678 states. [2021-06-05 07:06:04,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63678 to 44507. [2021-06-05 07:06:04,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44507 states, 44506 states have (on average 3.55304902709747) internal successors, (158132), 44506 states have internal predecessors, (158132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:04,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44507 states to 44507 states and 158132 transitions. [2021-06-05 07:06:04,418 INFO L78 Accepts]: Start accepts. Automaton has 44507 states and 158132 transitions. Word has length 36 [2021-06-05 07:06:04,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:04,418 INFO L482 AbstractCegarLoop]: Abstraction has 44507 states and 158132 transitions. [2021-06-05 07:06:04,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:04,418 INFO L276 IsEmpty]: Start isEmpty. Operand 44507 states and 158132 transitions. [2021-06-05 07:06:04,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:06:04,478 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:04,478 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:06:04,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-06-05 07:06:04,680 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:04,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:04,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1585932856, now seen corresponding path program 160 times [2021-06-05 07:06:04,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:04,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322435688] [2021-06-05 07:06:04,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:04,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:04,744 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:04,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:04,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322435688] [2021-06-05 07:06:04,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322435688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:04,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637536258] [2021-06-05 07:06:04,744 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:04,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:06:04,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:04,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:06:04,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:04,898 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:04,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637536258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:04,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:04,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 07:06:04,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593845168] [2021-06-05 07:06:04,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:06:04,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:04,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:06:04,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:06:04,899 INFO L87 Difference]: Start difference. First operand 44507 states and 158132 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 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 07:06:06,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:06,109 INFO L93 Difference]: Finished difference Result 80580 states and 276969 transitions. [2021-06-05 07:06:06,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 07:06:06,109 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 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 36 [2021-06-05 07:06:06,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:06,286 INFO L225 Difference]: With dead ends: 80580 [2021-06-05 07:06:06,286 INFO L226 Difference]: Without dead ends: 80580 [2021-06-05 07:06:06,286 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1037 ImplicationChecksByTransitivity, 471.5ms TimeCoverageRelationStatistics Valid=732, Invalid=2460, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 07:06:06,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80580 states. [2021-06-05 07:06:07,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80580 to 46437. [2021-06-05 07:06:07,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46437 states, 46436 states have (on average 3.579894909122233) internal successors, (166236), 46436 states have internal predecessors, (166236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:07,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46437 states to 46437 states and 166236 transitions. [2021-06-05 07:06:07,662 INFO L78 Accepts]: Start accepts. Automaton has 46437 states and 166236 transitions. Word has length 36 [2021-06-05 07:06:07,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:07,663 INFO L482 AbstractCegarLoop]: Abstraction has 46437 states and 166236 transitions. [2021-06-05 07:06:07,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 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 07:06:07,663 INFO L276 IsEmpty]: Start isEmpty. Operand 46437 states and 166236 transitions. [2021-06-05 07:06:07,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:06:07,719 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:07,720 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:06:07,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:07,925 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:07,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:07,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1236979144, now seen corresponding path program 161 times [2021-06-05 07:06:07,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:07,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642626702] [2021-06-05 07:06:07,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:07,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:07,979 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:07,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:07,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642626702] [2021-06-05 07:06:07,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642626702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:07,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144669285] [2021-06-05 07:06:07,979 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:08,006 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 07:06:08,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:08,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:06:08,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:08,135 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:08,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144669285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:08,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:08,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 07:06:08,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628604532] [2021-06-05 07:06:08,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:06:08,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:08,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:06:08,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:06:08,136 INFO L87 Difference]: Start difference. First operand 46437 states and 166236 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 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 07:06:09,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:09,241 INFO L93 Difference]: Finished difference Result 86965 states and 298293 transitions. [2021-06-05 07:06:09,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 07:06:09,241 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 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 36 [2021-06-05 07:06:09,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:09,418 INFO L225 Difference]: With dead ends: 86965 [2021-06-05 07:06:09,418 INFO L226 Difference]: Without dead ends: 86965 [2021-06-05 07:06:09,418 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 367.8ms TimeCoverageRelationStatistics Valid=537, Invalid=1815, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:06:09,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86965 states. [2021-06-05 07:06:10,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86965 to 46927. [2021-06-05 07:06:10,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46927 states, 46926 states have (on average 3.586327409112219) internal successors, (168292), 46926 states have internal predecessors, (168292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:11,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46927 states to 46927 states and 168292 transitions. [2021-06-05 07:06:11,090 INFO L78 Accepts]: Start accepts. Automaton has 46927 states and 168292 transitions. Word has length 36 [2021-06-05 07:06:11,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:11,090 INFO L482 AbstractCegarLoop]: Abstraction has 46927 states and 168292 transitions. [2021-06-05 07:06:11,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 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 07:06:11,091 INFO L276 IsEmpty]: Start isEmpty. Operand 46927 states and 168292 transitions. [2021-06-05 07:06:11,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:06:11,154 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:11,154 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:06:11,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:11,354 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:11,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:11,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1387961778, now seen corresponding path program 162 times [2021-06-05 07:06:11,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:11,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454537960] [2021-06-05 07:06:11,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:11,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:11,413 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:11,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:11,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454537960] [2021-06-05 07:06:11,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454537960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:11,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511810616] [2021-06-05 07:06:11,413 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:11,438 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 07:06:11,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:11,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:06:11,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:11,602 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:11,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511810616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:11,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:11,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 07:06:11,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904630024] [2021-06-05 07:06:11,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:06:11,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:11,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:06:11,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:06:11,603 INFO L87 Difference]: Start difference. First operand 46927 states and 168292 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 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 07:06:12,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:12,607 INFO L93 Difference]: Finished difference Result 85794 states and 294291 transitions. [2021-06-05 07:06:12,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 07:06:12,607 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 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 07:06:12,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:12,784 INFO L225 Difference]: With dead ends: 85794 [2021-06-05 07:06:12,784 INFO L226 Difference]: Without dead ends: 85794 [2021-06-05 07:06:12,785 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 415.8ms TimeCoverageRelationStatistics Valid=513, Invalid=1839, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 07:06:12,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85794 states. [2021-06-05 07:06:14,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85794 to 48129. [2021-06-05 07:06:14,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48129 states, 48128 states have (on average 3.575236868351064) internal successors, (172069), 48128 states have internal predecessors, (172069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:14,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48129 states to 48129 states and 172069 transitions. [2021-06-05 07:06:14,360 INFO L78 Accepts]: Start accepts. Automaton has 48129 states and 172069 transitions. Word has length 36 [2021-06-05 07:06:14,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:14,360 INFO L482 AbstractCegarLoop]: Abstraction has 48129 states and 172069 transitions. [2021-06-05 07:06:14,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 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 07:06:14,361 INFO L276 IsEmpty]: Start isEmpty. Operand 48129 states and 172069 transitions. [2021-06-05 07:06:14,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:06:14,419 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:14,419 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:06:14,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2021-06-05 07:06:14,619 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:14,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:14,619 INFO L82 PathProgramCache]: Analyzing trace with hash -262360878, now seen corresponding path program 163 times [2021-06-05 07:06:14,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:14,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913453470] [2021-06-05 07:06:14,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:14,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:14,673 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:14,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:14,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913453470] [2021-06-05 07:06:14,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913453470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:14,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772341435] [2021-06-05 07:06:14,673 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:14,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:14,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:06:14,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:14,832 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:06:14,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772341435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:14,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:14,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-06-05 07:06:14,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875315438] [2021-06-05 07:06:14,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:06:14,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:14,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:06:14,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:06:14,833 INFO L87 Difference]: Start difference. First operand 48129 states and 172069 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 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 07:06:17,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:17,731 INFO L93 Difference]: Finished difference Result 88715 states and 301120 transitions. [2021-06-05 07:06:17,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2021-06-05 07:06:17,732 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 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 07:06:17,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:18,155 INFO L225 Difference]: With dead ends: 88715 [2021-06-05 07:06:18,155 INFO L226 Difference]: Without dead ends: 88715 [2021-06-05 07:06:18,156 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7758 ImplicationChecksByTransitivity, 1674.8ms TimeCoverageRelationStatistics Valid=3593, Invalid=15867, Unknown=0, NotChecked=0, Total=19460 [2021-06-05 07:06:18,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88715 states. [2021-06-05 07:06:19,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88715 to 45652. [2021-06-05 07:06:19,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45652 states, 45651 states have (on average 3.5827911765350158) internal successors, (163558), 45651 states have internal predecessors, (163558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:19,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45652 states to 45652 states and 163558 transitions. [2021-06-05 07:06:19,546 INFO L78 Accepts]: Start accepts. Automaton has 45652 states and 163558 transitions. Word has length 36 [2021-06-05 07:06:19,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:19,546 INFO L482 AbstractCegarLoop]: Abstraction has 45652 states and 163558 transitions. [2021-06-05 07:06:19,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 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 07:06:19,546 INFO L276 IsEmpty]: Start isEmpty. Operand 45652 states and 163558 transitions. [2021-06-05 07:06:19,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:06:19,602 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:19,602 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:06:19,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:19,802 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:19,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:19,802 INFO L82 PathProgramCache]: Analyzing trace with hash -541274128, now seen corresponding path program 164 times [2021-06-05 07:06:19,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:19,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321528976] [2021-06-05 07:06:19,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:19,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:19,852 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:19,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:19,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321528976] [2021-06-05 07:06:19,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321528976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:19,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703136716] [2021-06-05 07:06:19,852 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:19,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:06:19,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:19,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:06:19,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:19,975 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:06:19,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703136716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:19,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:19,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 07:06:19,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824655920] [2021-06-05 07:06:19,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:06:19,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:19,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:06:19,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:06:19,976 INFO L87 Difference]: Start difference. First operand 45652 states and 163558 transitions. Second operand has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 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 07:06:20,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:20,996 INFO L93 Difference]: Finished difference Result 60067 states and 210919 transitions. [2021-06-05 07:06:20,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 07:06:20,997 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 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 07:06:20,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:21,111 INFO L225 Difference]: With dead ends: 60067 [2021-06-05 07:06:21,111 INFO L226 Difference]: Without dead ends: 60043 [2021-06-05 07:06:21,112 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 484.4ms TimeCoverageRelationStatistics Valid=593, Invalid=2269, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 07:06:21,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60043 states. [2021-06-05 07:06:22,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60043 to 45808. [2021-06-05 07:06:22,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45808 states, 45807 states have (on average 3.58054445827057) internal successors, (164014), 45807 states have internal predecessors, (164014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:22,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45808 states to 45808 states and 164014 transitions. [2021-06-05 07:06:22,231 INFO L78 Accepts]: Start accepts. Automaton has 45808 states and 164014 transitions. Word has length 36 [2021-06-05 07:06:22,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:22,231 INFO L482 AbstractCegarLoop]: Abstraction has 45808 states and 164014 transitions. [2021-06-05 07:06:22,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 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 07:06:22,231 INFO L276 IsEmpty]: Start isEmpty. Operand 45808 states and 164014 transitions. [2021-06-05 07:06:22,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:06:22,287 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:22,287 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:06:22,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:22,488 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:22,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:22,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1183120336, now seen corresponding path program 165 times [2021-06-05 07:06:22,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:22,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7168671] [2021-06-05 07:06:22,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:22,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:22,544 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:22,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:22,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7168671] [2021-06-05 07:06:22,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7168671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:22,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067202657] [2021-06-05 07:06:22,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:22,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 07:06:22,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:22,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:06:22,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:22,665 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:22,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067202657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:22,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:22,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-06-05 07:06:22,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545674130] [2021-06-05 07:06:22,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:06:22,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:22,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:06:22,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:06:22,666 INFO L87 Difference]: Start difference. First operand 45808 states and 164014 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 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 07:06:23,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:23,663 INFO L93 Difference]: Finished difference Result 60487 states and 212293 transitions. [2021-06-05 07:06:23,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 07:06:23,663 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 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 36 [2021-06-05 07:06:23,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:23,786 INFO L225 Difference]: With dead ends: 60487 [2021-06-05 07:06:23,786 INFO L226 Difference]: Without dead ends: 60447 [2021-06-05 07:06:23,786 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 368.3ms TimeCoverageRelationStatistics Valid=483, Invalid=1773, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 07:06:23,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60447 states. [2021-06-05 07:06:24,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60447 to 45848. [2021-06-05 07:06:24,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45848 states, 45847 states have (on average 3.579776212184003) internal successors, (164122), 45847 states have internal predecessors, (164122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:25,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45848 states to 45848 states and 164122 transitions. [2021-06-05 07:06:25,018 INFO L78 Accepts]: Start accepts. Automaton has 45848 states and 164122 transitions. Word has length 36 [2021-06-05 07:06:25,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:25,019 INFO L482 AbstractCegarLoop]: Abstraction has 45848 states and 164122 transitions. [2021-06-05 07:06:25,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 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 07:06:25,019 INFO L276 IsEmpty]: Start isEmpty. Operand 45848 states and 164122 transitions. [2021-06-05 07:06:25,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:06:25,086 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:25,086 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:06:25,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:25,301 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:25,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:25,302 INFO L82 PathProgramCache]: Analyzing trace with hash 477964400, now seen corresponding path program 166 times [2021-06-05 07:06:25,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:25,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997717640] [2021-06-05 07:06:25,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:25,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:25,362 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:25,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:25,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997717640] [2021-06-05 07:06:25,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997717640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:25,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405582966] [2021-06-05 07:06:25,362 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:25,385 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:06:25,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:25,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:06:25,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:25,475 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 07:06:25,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405582966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:25,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:25,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-06-05 07:06:25,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311471307] [2021-06-05 07:06:25,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:06:25,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:25,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:06:25,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:06:25,475 INFO L87 Difference]: Start difference. First operand 45848 states and 164122 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 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 07:06:26,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:26,008 INFO L93 Difference]: Finished difference Result 61038 states and 214089 transitions. [2021-06-05 07:06:26,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 07:06:26,008 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 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 36 [2021-06-05 07:06:26,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:26,137 INFO L225 Difference]: With dead ends: 61038 [2021-06-05 07:06:26,137 INFO L226 Difference]: Without dead ends: 60982 [2021-06-05 07:06:26,138 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 250.2ms TimeCoverageRelationStatistics Valid=324, Invalid=1158, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 07:06:26,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60982 states. [2021-06-05 07:06:27,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60982 to 46210. [2021-06-05 07:06:27,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46210 states, 46209 states have (on average 3.574996212858967) internal successors, (165197), 46209 states have internal predecessors, (165197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:27,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46210 states to 46210 states and 165197 transitions. [2021-06-05 07:06:27,574 INFO L78 Accepts]: Start accepts. Automaton has 46210 states and 165197 transitions. Word has length 36 [2021-06-05 07:06:27,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:27,574 INFO L482 AbstractCegarLoop]: Abstraction has 46210 states and 165197 transitions. [2021-06-05 07:06:27,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 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 07:06:27,574 INFO L276 IsEmpty]: Start isEmpty. Operand 46210 states and 165197 transitions. [2021-06-05 07:06:27,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:06:27,631 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:27,631 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 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 07:06:27,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable197 [2021-06-05 07:06:27,831 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:27,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:27,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1387504756, now seen corresponding path program 167 times [2021-06-05 07:06:27,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:27,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143700039] [2021-06-05 07:06:27,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:27,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:27,895 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:27,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:27,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143700039] [2021-06-05 07:06:27,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143700039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:27,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55305919] [2021-06-05 07:06:27,895 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:27,919 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 07:06:27,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:27,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:06:27,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:28,033 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:28,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55305919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:28,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:28,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 07:06:28,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763474497] [2021-06-05 07:06:28,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 07:06:28,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:28,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 07:06:28,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-06-05 07:06:28,034 INFO L87 Difference]: Start difference. First operand 46210 states and 165197 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 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 07:06:30,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:30,159 INFO L93 Difference]: Finished difference Result 98103 states and 338371 transitions. [2021-06-05 07:06:30,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-06-05 07:06:30,160 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 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 36 [2021-06-05 07:06:30,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:30,355 INFO L225 Difference]: With dead ends: 98103 [2021-06-05 07:06:30,356 INFO L226 Difference]: Without dead ends: 98007 [2021-06-05 07:06:30,356 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4211 ImplicationChecksByTransitivity, 1340.0ms TimeCoverageRelationStatistics Valid=2335, Invalid=8795, Unknown=0, NotChecked=0, Total=11130 [2021-06-05 07:06:30,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98007 states. [2021-06-05 07:06:31,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98007 to 48240. [2021-06-05 07:06:31,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48240 states, 48239 states have (on average 3.5919069632455067) internal successors, (173270), 48239 states have internal predecessors, (173270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:31,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48240 states to 48240 states and 173270 transitions. [2021-06-05 07:06:31,878 INFO L78 Accepts]: Start accepts. Automaton has 48240 states and 173270 transitions. Word has length 36 [2021-06-05 07:06:31,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:31,878 INFO L482 AbstractCegarLoop]: Abstraction has 48240 states and 173270 transitions. [2021-06-05 07:06:31,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 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 07:06:31,878 INFO L276 IsEmpty]: Start isEmpty. Operand 48240 states and 173270 transitions. [2021-06-05 07:06:31,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:06:31,937 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:31,937 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:06:32,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:32,137 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:32,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:32,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1051947072, now seen corresponding path program 31 times [2021-06-05 07:06:32,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:32,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840500170] [2021-06-05 07:06:32,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:32,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:32,394 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-06-05 07:06:32,423 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:32,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:32,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840500170] [2021-06-05 07:06:32,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840500170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:32,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719224133] [2021-06-05 07:06:32,423 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:32,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:32,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:06:32,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:32,598 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:32,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719224133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:32,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:32,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 07:06:32,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021117929] [2021-06-05 07:06:32,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:06:32,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:32,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:06:32,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:06:32,598 INFO L87 Difference]: Start difference. First operand 48240 states and 173270 transitions. Second operand has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 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 07:06:34,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:34,327 INFO L93 Difference]: Finished difference Result 93202 states and 319824 transitions. [2021-06-05 07:06:34,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 07:06:34,327 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 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 07:06:34,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:34,727 INFO L225 Difference]: With dead ends: 93202 [2021-06-05 07:06:34,728 INFO L226 Difference]: Without dead ends: 93202 [2021-06-05 07:06:34,728 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3041 ImplicationChecksByTransitivity, 1162.7ms TimeCoverageRelationStatistics Valid=1871, Invalid=6139, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 07:06:34,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93202 states. [2021-06-05 07:06:35,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93202 to 47715. [2021-06-05 07:06:36,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47715 states, 47714 states have (on average 3.5815274342960137) internal successors, (170889), 47714 states have internal predecessors, (170889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:36,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47715 states to 47715 states and 170889 transitions. [2021-06-05 07:06:36,118 INFO L78 Accepts]: Start accepts. Automaton has 47715 states and 170889 transitions. Word has length 36 [2021-06-05 07:06:36,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:36,118 INFO L482 AbstractCegarLoop]: Abstraction has 47715 states and 170889 transitions. [2021-06-05 07:06:36,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 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 07:06:36,118 INFO L276 IsEmpty]: Start isEmpty. Operand 47715 states and 170889 transitions. [2021-06-05 07:06:36,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 07:06:36,178 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:36,178 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:06:36,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:36,378 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:36,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:36,379 INFO L82 PathProgramCache]: Analyzing trace with hash 822150136, now seen corresponding path program 32 times [2021-06-05 07:06:36,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:36,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000362533] [2021-06-05 07:06:36,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:36,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:36,426 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:36,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:36,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000362533] [2021-06-05 07:06:36,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000362533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:36,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528263624] [2021-06-05 07:06:36,426 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:36,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:06:36,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:36,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:06:36,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:36,582 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 07:06:36,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528263624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:36,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:36,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 07:06:36,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117849539] [2021-06-05 07:06:36,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:06:36,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:36,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:06:36,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:06:36,585 INFO L87 Difference]: Start difference. First operand 47715 states and 170889 transitions. Second operand has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 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 07:06:40,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:40,182 INFO L93 Difference]: Finished difference Result 90552 states and 306749 transitions. [2021-06-05 07:06:40,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2021-06-05 07:06:40,182 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 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 36 [2021-06-05 07:06:40,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:40,361 INFO L225 Difference]: With dead ends: 90552 [2021-06-05 07:06:40,361 INFO L226 Difference]: Without dead ends: 90552 [2021-06-05 07:06:40,362 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11781 ImplicationChecksByTransitivity, 2105.0ms TimeCoverageRelationStatistics Valid=4945, Invalid=22445, Unknown=0, NotChecked=0, Total=27390 [2021-06-05 07:06:40,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90552 states. [2021-06-05 07:06:41,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90552 to 47578. [2021-06-05 07:06:41,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47578 states, 47577 states have (on average 3.5791664039346744) internal successors, (170286), 47577 states have internal predecessors, (170286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:41,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47578 states to 47578 states and 170286 transitions. [2021-06-05 07:06:41,783 INFO L78 Accepts]: Start accepts. Automaton has 47578 states and 170286 transitions. Word has length 36 [2021-06-05 07:06:41,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:41,784 INFO L482 AbstractCegarLoop]: Abstraction has 47578 states and 170286 transitions. [2021-06-05 07:06:41,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 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 07:06:41,784 INFO L276 IsEmpty]: Start isEmpty. Operand 47578 states and 170286 transitions. [2021-06-05 07:06:41,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 07:06:41,844 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:41,844 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:06:42,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-06-05 07:06:42,044 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:42,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:42,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1213094942, now seen corresponding path program 168 times [2021-06-05 07:06:42,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:42,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084552055] [2021-06-05 07:06:42,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:42,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:42,110 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:42,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:42,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084552055] [2021-06-05 07:06:42,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084552055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:42,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222699782] [2021-06-05 07:06:42,110 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:42,133 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 07:06:42,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:42,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 07:06:42,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:42,482 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:42,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222699782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:42,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:42,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 07:06:42,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499228151] [2021-06-05 07:06:42,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 07:06:42,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:42,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 07:06:42,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:06:42,483 INFO L87 Difference]: Start difference. First operand 47578 states and 170286 transitions. Second operand has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:44,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:44,465 INFO L93 Difference]: Finished difference Result 84172 states and 291355 transitions. [2021-06-05 07:06:44,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-06-05 07:06:44,466 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 07:06:44,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:44,824 INFO L225 Difference]: With dead ends: 84172 [2021-06-05 07:06:44,824 INFO L226 Difference]: Without dead ends: 84172 [2021-06-05 07:06:44,825 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3966 ImplicationChecksByTransitivity, 1278.0ms TimeCoverageRelationStatistics Valid=2254, Invalid=8666, Unknown=0, NotChecked=0, Total=10920 [2021-06-05 07:06:44,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84172 states. [2021-06-05 07:06:45,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84172 to 46240. [2021-06-05 07:06:45,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46240 states, 46239 states have (on average 3.55470490278769) internal successors, (164366), 46239 states have internal predecessors, (164366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:46,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46240 states to 46240 states and 164366 transitions. [2021-06-05 07:06:46,026 INFO L78 Accepts]: Start accepts. Automaton has 46240 states and 164366 transitions. Word has length 38 [2021-06-05 07:06:46,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:46,026 INFO L482 AbstractCegarLoop]: Abstraction has 46240 states and 164366 transitions. [2021-06-05 07:06:46,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:46,027 INFO L276 IsEmpty]: Start isEmpty. Operand 46240 states and 164366 transitions. [2021-06-05 07:06:46,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 07:06:46,084 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:46,084 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:06:46,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-05 07:06:46,285 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:46,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:46,285 INFO L82 PathProgramCache]: Analyzing trace with hash -660509142, now seen corresponding path program 169 times [2021-06-05 07:06:46,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:46,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935566340] [2021-06-05 07:06:46,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:46,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:46,351 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:46,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:46,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935566340] [2021-06-05 07:06:46,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935566340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:46,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92860121] [2021-06-05 07:06:46,351 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:46,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:46,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 07:06:46,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:46,548 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:46,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92860121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:46,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:46,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 07:06:46,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743594482] [2021-06-05 07:06:46,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 07:06:46,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:46,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 07:06:46,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:06:46,549 INFO L87 Difference]: Start difference. First operand 46240 states and 164366 transitions. Second operand has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:49,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:49,114 INFO L93 Difference]: Finished difference Result 102346 states and 353710 transitions. [2021-06-05 07:06:49,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-06-05 07:06:49,114 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have 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 07:06:49,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:49,347 INFO L225 Difference]: With dead ends: 102346 [2021-06-05 07:06:49,347 INFO L226 Difference]: Without dead ends: 102346 [2021-06-05 07:06:49,348 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4822 ImplicationChecksByTransitivity, 1285.4ms TimeCoverageRelationStatistics Valid=2499, Invalid=10611, Unknown=0, NotChecked=0, Total=13110 [2021-06-05 07:06:49,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102346 states. [2021-06-05 07:06:50,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102346 to 46231. [2021-06-05 07:06:51,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46231 states, 46230 states have (on average 3.55425048669695) internal successors, (164313), 46230 states have internal predecessors, (164313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:51,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46231 states to 46231 states and 164313 transitions. [2021-06-05 07:06:51,108 INFO L78 Accepts]: Start accepts. Automaton has 46231 states and 164313 transitions. Word has length 38 [2021-06-05 07:06:51,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:51,108 INFO L482 AbstractCegarLoop]: Abstraction has 46231 states and 164313 transitions. [2021-06-05 07:06:51,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:51,108 INFO L276 IsEmpty]: Start isEmpty. Operand 46231 states and 164313 transitions. [2021-06-05 07:06:51,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 07:06:51,166 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:51,166 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:06:51,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-05 07:06:51,367 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:51,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:51,367 INFO L82 PathProgramCache]: Analyzing trace with hash -645048346, now seen corresponding path program 170 times [2021-06-05 07:06:51,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:51,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496781919] [2021-06-05 07:06:51,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:51,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:51,432 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:51,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:51,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496781919] [2021-06-05 07:06:51,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496781919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:51,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811319733] [2021-06-05 07:06:51,433 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:51,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:06:51,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:51,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 07:06:51,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:51,628 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:51,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811319733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:51,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:51,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 07:06:51,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543847834] [2021-06-05 07:06:51,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 07:06:51,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:51,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 07:06:51,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:06:51,629 INFO L87 Difference]: Start difference. First operand 46231 states and 164313 transitions. Second operand has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:54,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:06:54,221 INFO L93 Difference]: Finished difference Result 103205 states and 355608 transitions. [2021-06-05 07:06:54,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-06-05 07:06:54,222 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have 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 07:06:54,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:06:54,457 INFO L225 Difference]: With dead ends: 103205 [2021-06-05 07:06:54,458 INFO L226 Difference]: Without dead ends: 103205 [2021-06-05 07:06:54,458 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4862 ImplicationChecksByTransitivity, 1463.2ms TimeCoverageRelationStatistics Valid=2510, Invalid=10830, Unknown=0, NotChecked=0, Total=13340 [2021-06-05 07:06:54,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103205 states. [2021-06-05 07:06:56,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103205 to 46140. [2021-06-05 07:06:56,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46140 states, 46139 states have (on average 3.551940874314571) internal successors, (163883), 46139 states have internal predecessors, (163883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:56,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46140 states to 46140 states and 163883 transitions. [2021-06-05 07:06:56,209 INFO L78 Accepts]: Start accepts. Automaton has 46140 states and 163883 transitions. Word has length 38 [2021-06-05 07:06:56,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:06:56,209 INFO L482 AbstractCegarLoop]: Abstraction has 46140 states and 163883 transitions. [2021-06-05 07:06:56,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:56,210 INFO L276 IsEmpty]: Start isEmpty. Operand 46140 states and 163883 transitions. [2021-06-05 07:06:56,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 07:06:56,268 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:06:56,268 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:06:56,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:56,468 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:06:56,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:06:56,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1650063650, now seen corresponding path program 171 times [2021-06-05 07:06:56,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:06:56,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141231468] [2021-06-05 07:06:56,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:06:56,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:06:56,533 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:06:56,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:06:56,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141231468] [2021-06-05 07:06:56,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141231468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:56,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107536719] [2021-06-05 07:06:56,534 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:06:56,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:06:56,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:06:56,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 07:06:56,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:06:56,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-05 07:06:56,632 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:56,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:56,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:06:56,640 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:20 [2021-06-05 07:06:56,671 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-06-05 07:06:56,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 07:06:56,672 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:56,680 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:56,681 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 07:06:56,681 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:32 [2021-06-05 07:06:56,761 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-06-05 07:06:56,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2021-06-05 07:06:56,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:56,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:56,774 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 07:06:56,774 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:41 [2021-06-05 07:06:56,841 INFO L354 Elim1Store]: treesize reduction 72, result has 18.2 percent of original size [2021-06-05 07:06:56,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 38 [2021-06-05 07:06:56,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:06:56,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:06:56,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 07:06:56,859 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:54, output treesize:53 [2021-06-05 07:06:56,951 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-05 07:06:56,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107536719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:06:56,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:06:56,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-06-05 07:06:56,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906572967] [2021-06-05 07:06:56,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 07:06:56,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:06:56,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 07:06:56,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:06:56,952 INFO L87 Difference]: Start difference. First operand 46140 states and 163883 transitions. Second operand has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:06:58,498 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-06-05 07:07:05,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:05,928 INFO L93 Difference]: Finished difference Result 75308 states and 254815 transitions. [2021-06-05 07:07:05,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 249 states. [2021-06-05 07:07:05,929 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 07:07:05,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:06,077 INFO L225 Difference]: With dead ends: 75308 [2021-06-05 07:07:06,077 INFO L226 Difference]: Without dead ends: 75043 [2021-06-05 07:07:06,080 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30066 ImplicationChecksByTransitivity, 6879.7ms TimeCoverageRelationStatistics Valid=9127, Invalid=59779, Unknown=0, NotChecked=0, Total=68906 [2021-06-05 07:07:06,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75043 states. [2021-06-05 07:07:07,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75043 to 48238. [2021-06-05 07:07:07,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48238 states, 48237 states have (on average 3.5619545162427184) internal successors, (171818), 48237 states have internal predecessors, (171818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:07,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48238 states to 48238 states and 171818 transitions. [2021-06-05 07:07:07,306 INFO L78 Accepts]: Start accepts. Automaton has 48238 states and 171818 transitions. Word has length 38 [2021-06-05 07:07:07,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:07,306 INFO L482 AbstractCegarLoop]: Abstraction has 48238 states and 171818 transitions. [2021-06-05 07:07:07,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:07,306 INFO L276 IsEmpty]: Start isEmpty. Operand 48238 states and 171818 transitions. [2021-06-05 07:07:07,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 07:07:07,367 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:07,367 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:07:07,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2021-06-05 07:07:07,567 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:07,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:07,568 INFO L82 PathProgramCache]: Analyzing trace with hash 509936226, now seen corresponding path program 172 times [2021-06-05 07:07:07,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:07,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220992352] [2021-06-05 07:07:07,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:07,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:07,633 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:07,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:07,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220992352] [2021-06-05 07:07:07,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220992352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:07,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499585451] [2021-06-05 07:07:07,633 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:07,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:07:07,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:07,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 07:07:07,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:07,807 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:07,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499585451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:07,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:07,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 07:07:07,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423624318] [2021-06-05 07:07:07,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 07:07:07,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:07,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 07:07:07,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:07:07,808 INFO L87 Difference]: Start difference. First operand 48238 states and 171818 transitions. Second operand has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:08,453 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2021-06-05 07:07:10,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:10,022 INFO L93 Difference]: Finished difference Result 81604 states and 282162 transitions. [2021-06-05 07:07:10,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-06-05 07:07:10,022 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have 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 07:07:10,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:10,194 INFO L225 Difference]: With dead ends: 81604 [2021-06-05 07:07:10,194 INFO L226 Difference]: Without dead ends: 81604 [2021-06-05 07:07:10,195 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3744 ImplicationChecksByTransitivity, 1273.4ms TimeCoverageRelationStatistics Valid=2006, Invalid=8500, Unknown=0, NotChecked=0, Total=10506 [2021-06-05 07:07:10,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81604 states. [2021-06-05 07:07:11,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81604 to 48089. [2021-06-05 07:07:11,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48089 states, 48088 states have (on average 3.559682249209782) internal successors, (171178), 48088 states have internal predecessors, (171178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:11,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48089 states to 48089 states and 171178 transitions. [2021-06-05 07:07:11,629 INFO L78 Accepts]: Start accepts. Automaton has 48089 states and 171178 transitions. Word has length 38 [2021-06-05 07:07:11,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:11,629 INFO L482 AbstractCegarLoop]: Abstraction has 48089 states and 171178 transitions. [2021-06-05 07:07:11,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:11,629 INFO L276 IsEmpty]: Start isEmpty. Operand 48089 states and 171178 transitions. [2021-06-05 07:07:11,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 07:07:11,688 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:11,688 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:07:11,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:11,888 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:11,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:11,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1496118174, now seen corresponding path program 173 times [2021-06-05 07:07:11,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:11,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515235925] [2021-06-05 07:07:11,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:11,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:11,954 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:11,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:11,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515235925] [2021-06-05 07:07:11,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515235925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:11,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915041482] [2021-06-05 07:07:11,955 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:11,980 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 07:07:11,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:11,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 07:07:11,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:12,118 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:12,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915041482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:12,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:12,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 07:07:12,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909122908] [2021-06-05 07:07:12,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:07:12,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:12,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:07:12,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:07:12,119 INFO L87 Difference]: Start difference. First operand 48089 states and 171178 transitions. Second operand has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 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 07:07:13,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:13,939 INFO L93 Difference]: Finished difference Result 79734 states and 276240 transitions. [2021-06-05 07:07:13,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-05 07:07:13,939 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 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 38 [2021-06-05 07:07:13,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:14,100 INFO L225 Difference]: With dead ends: 79734 [2021-06-05 07:07:14,100 INFO L226 Difference]: Without dead ends: 79734 [2021-06-05 07:07:14,100 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2751 ImplicationChecksByTransitivity, 1053.7ms TimeCoverageRelationStatistics Valid=1525, Invalid=6485, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 07:07:14,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79734 states. [2021-06-05 07:07:15,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79734 to 48379. [2021-06-05 07:07:15,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48379 states, 48378 states have (on average 3.5571747488527845) internal successors, (172089), 48378 states have internal predecessors, (172089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:15,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48379 states to 48379 states and 172089 transitions. [2021-06-05 07:07:15,466 INFO L78 Accepts]: Start accepts. Automaton has 48379 states and 172089 transitions. Word has length 38 [2021-06-05 07:07:15,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:15,466 INFO L482 AbstractCegarLoop]: Abstraction has 48379 states and 172089 transitions. [2021-06-05 07:07:15,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 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 07:07:15,466 INFO L276 IsEmpty]: Start isEmpty. Operand 48379 states and 172089 transitions. [2021-06-05 07:07:15,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 07:07:15,526 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:15,526 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:07:15,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-06-05 07:07:15,727 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:15,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:15,727 INFO L82 PathProgramCache]: Analyzing trace with hash 383786966, now seen corresponding path program 33 times [2021-06-05 07:07:15,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:15,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598742056] [2021-06-05 07:07:15,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:15,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:15,793 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:15,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:15,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598742056] [2021-06-05 07:07:15,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598742056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:15,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119277912] [2021-06-05 07:07:15,794 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:15,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 07:07:15,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:15,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 07:07:15,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:15,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-05 07:07:15,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:07:15,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:15,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 07:07:15,952 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:24 [2021-06-05 07:07:15,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:07:15,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-06-05 07:07:15,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:07:15,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:15,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 07:07:15,987 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:36 [2021-06-05 07:07:16,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:07:16,036 INFO L354 Elim1Store]: treesize reduction 38, result has 25.5 percent of original size [2021-06-05 07:07:16,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 32 [2021-06-05 07:07:16,037 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:07:16,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:16,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 07:07:16,051 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:48 [2021-06-05 07:07:16,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 07:07:16,124 INFO L354 Elim1Store]: treesize reduction 72, result has 20.0 percent of original size [2021-06-05 07:07:16,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 42 [2021-06-05 07:07:16,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 07:07:16,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 07:07:16,146 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 07:07:16,146 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:61, output treesize:60 [2021-06-05 07:07:16,583 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-05 07:07:16,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119277912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:16,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:16,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 26 [2021-06-05 07:07:16,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351812766] [2021-06-05 07:07:16,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 07:07:16,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:16,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 07:07:16,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-06-05 07:07:16,584 INFO L87 Difference]: Start difference. First operand 48379 states and 172089 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:22,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:22,259 INFO L93 Difference]: Finished difference Result 58151 states and 199699 transitions. [2021-06-05 07:07:22,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2021-06-05 07:07:22,259 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have 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 07:07:22,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:22,374 INFO L225 Difference]: With dead ends: 58151 [2021-06-05 07:07:22,374 INFO L226 Difference]: Without dead ends: 57965 [2021-06-05 07:07:22,376 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9563 ImplicationChecksByTransitivity, 3740.1ms TimeCoverageRelationStatistics Valid=3322, Invalid=23084, Unknown=0, NotChecked=0, Total=26406 [2021-06-05 07:07:22,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57965 states. [2021-06-05 07:07:23,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57965 to 49217. [2021-06-05 07:07:23,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49217 states, 49216 states have (on average 3.544457087126138) internal successors, (174444), 49216 states have internal predecessors, (174444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:23,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49217 states to 49217 states and 174444 transitions. [2021-06-05 07:07:23,429 INFO L78 Accepts]: Start accepts. Automaton has 49217 states and 174444 transitions. Word has length 38 [2021-06-05 07:07:23,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:23,429 INFO L482 AbstractCegarLoop]: Abstraction has 49217 states and 174444 transitions. [2021-06-05 07:07:23,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:23,430 INFO L276 IsEmpty]: Start isEmpty. Operand 49217 states and 174444 transitions. [2021-06-05 07:07:23,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 07:07:23,632 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:23,632 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:07:23,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable207 [2021-06-05 07:07:23,833 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:23,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:23,833 INFO L82 PathProgramCache]: Analyzing trace with hash -977093798, now seen corresponding path program 34 times [2021-06-05 07:07:23,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:23,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639182460] [2021-06-05 07:07:23,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:23,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:23,898 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:23,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:23,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639182460] [2021-06-05 07:07:23,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639182460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:23,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524725085] [2021-06-05 07:07:23,898 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:23,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:07:23,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:23,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 07:07:23,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:24,060 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:24,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524725085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:24,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:24,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 07:07:24,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971471245] [2021-06-05 07:07:24,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 07:07:24,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:24,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 07:07:24,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:07:24,061 INFO L87 Difference]: Start difference. First operand 49217 states and 174444 transitions. Second operand has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 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 07:07:26,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:26,159 INFO L93 Difference]: Finished difference Result 86687 states and 295949 transitions. [2021-06-05 07:07:26,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-06-05 07:07:26,159 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 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 38 [2021-06-05 07:07:26,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:26,319 INFO L225 Difference]: With dead ends: 86687 [2021-06-05 07:07:26,319 INFO L226 Difference]: Without dead ends: 86687 [2021-06-05 07:07:26,320 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4336 ImplicationChecksByTransitivity, 1117.7ms TimeCoverageRelationStatistics Valid=2398, Invalid=9158, Unknown=0, NotChecked=0, Total=11556 [2021-06-05 07:07:26,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86687 states. [2021-06-05 07:07:27,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86687 to 49319. [2021-06-05 07:07:27,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49319 states, 49318 states have (on average 3.541627803236141) internal successors, (174666), 49318 states have internal predecessors, (174666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:27,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49319 states to 49319 states and 174666 transitions. [2021-06-05 07:07:27,653 INFO L78 Accepts]: Start accepts. Automaton has 49319 states and 174666 transitions. Word has length 38 [2021-06-05 07:07:27,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:27,653 INFO L482 AbstractCegarLoop]: Abstraction has 49319 states and 174666 transitions. [2021-06-05 07:07:27,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 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 07:07:27,653 INFO L276 IsEmpty]: Start isEmpty. Operand 49319 states and 174666 transitions. [2021-06-05 07:07:27,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 07:07:27,715 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:27,715 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:07:27,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:27,915 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:27,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:27,915 INFO L82 PathProgramCache]: Analyzing trace with hash -151929582, now seen corresponding path program 174 times [2021-06-05 07:07:27,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:27,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401191766] [2021-06-05 07:07:27,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:27,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:27,959 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:27,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:27,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401191766] [2021-06-05 07:07:27,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401191766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:27,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274421732] [2021-06-05 07:07:27,960 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:27,985 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 07:07:27,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:27,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 07:07:27,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:28,087 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:28,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274421732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:28,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:28,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 07:07:28,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059688316] [2021-06-05 07:07:28,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:07:28,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:28,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:07:28,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:07:28,088 INFO L87 Difference]: Start difference. First operand 49319 states and 174666 transitions. Second operand has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 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 07:07:29,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:29,710 INFO L93 Difference]: Finished difference Result 80441 states and 277407 transitions. [2021-06-05 07:07:29,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 07:07:29,711 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 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 38 [2021-06-05 07:07:29,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:29,872 INFO L225 Difference]: With dead ends: 80441 [2021-06-05 07:07:29,872 INFO L226 Difference]: Without dead ends: 80433 [2021-06-05 07:07:29,873 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2578 ImplicationChecksByTransitivity, 667.2ms TimeCoverageRelationStatistics Valid=1363, Invalid=5609, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 07:07:29,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80433 states. [2021-06-05 07:07:31,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80433 to 49027. [2021-06-05 07:07:31,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49027 states, 49026 states have (on average 3.5350222331008037) internal successors, (173308), 49026 states have internal predecessors, (173308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:31,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49027 states to 49027 states and 173308 transitions. [2021-06-05 07:07:31,254 INFO L78 Accepts]: Start accepts. Automaton has 49027 states and 173308 transitions. Word has length 38 [2021-06-05 07:07:31,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:31,254 INFO L482 AbstractCegarLoop]: Abstraction has 49027 states and 173308 transitions. [2021-06-05 07:07:31,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 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 07:07:31,254 INFO L276 IsEmpty]: Start isEmpty. Operand 49027 states and 173308 transitions. [2021-06-05 07:07:31,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 07:07:31,315 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:31,315 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:07:31,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2021-06-05 07:07:31,516 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:31,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:31,516 INFO L82 PathProgramCache]: Analyzing trace with hash 826627862, now seen corresponding path program 175 times [2021-06-05 07:07:31,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:31,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545578556] [2021-06-05 07:07:31,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:31,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:31,757 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:31,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:31,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545578556] [2021-06-05 07:07:31,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545578556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:31,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993753002] [2021-06-05 07:07:31,757 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:31,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:31,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 07:07:31,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:31,904 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:31,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993753002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:31,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:31,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 07:07:31,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291203439] [2021-06-05 07:07:31,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:07:31,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:31,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:07:31,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:07:31,905 INFO L87 Difference]: Start difference. First operand 49027 states and 173308 transitions. Second operand has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 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 07:07:33,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:33,286 INFO L93 Difference]: Finished difference Result 81538 states and 279709 transitions. [2021-06-05 07:07:33,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-06-05 07:07:33,286 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 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 38 [2021-06-05 07:07:33,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:33,462 INFO L225 Difference]: With dead ends: 81538 [2021-06-05 07:07:33,462 INFO L226 Difference]: Without dead ends: 81538 [2021-06-05 07:07:33,463 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2860 ImplicationChecksByTransitivity, 682.6ms TimeCoverageRelationStatistics Valid=1397, Invalid=6085, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 07:07:33,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81538 states. [2021-06-05 07:07:34,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81538 to 48751. [2021-06-05 07:07:34,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48751 states, 48750 states have (on average 3.5292717948717947) internal successors, (172052), 48750 states have internal predecessors, (172052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:34,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48751 states to 48751 states and 172052 transitions. [2021-06-05 07:07:34,905 INFO L78 Accepts]: Start accepts. Automaton has 48751 states and 172052 transitions. Word has length 38 [2021-06-05 07:07:34,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:34,905 INFO L482 AbstractCegarLoop]: Abstraction has 48751 states and 172052 transitions. [2021-06-05 07:07:34,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 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 07:07:34,905 INFO L276 IsEmpty]: Start isEmpty. Operand 48751 states and 172052 transitions. [2021-06-05 07:07:34,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 07:07:34,966 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:34,966 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:07:35,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-06-05 07:07:35,166 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:35,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:35,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1341193110, now seen corresponding path program 176 times [2021-06-05 07:07:35,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:35,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147631754] [2021-06-05 07:07:35,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:35,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:35,210 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:35,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:35,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147631754] [2021-06-05 07:07:35,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147631754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:35,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765245627] [2021-06-05 07:07:35,210 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:35,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:07:35,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:35,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 07:07:35,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:35,360 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:35,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765245627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:35,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:35,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 07:07:35,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30168982] [2021-06-05 07:07:35,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:07:35,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:35,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:07:35,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:07:35,361 INFO L87 Difference]: Start difference. First operand 48751 states and 172052 transitions. Second operand has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:37,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:37,238 INFO L93 Difference]: Finished difference Result 91319 states and 312144 transitions. [2021-06-05 07:07:37,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-06-05 07:07:37,238 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have 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 07:07:37,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:37,439 INFO L225 Difference]: With dead ends: 91319 [2021-06-05 07:07:37,439 INFO L226 Difference]: Without dead ends: 91319 [2021-06-05 07:07:37,440 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3311 ImplicationChecksByTransitivity, 836.3ms TimeCoverageRelationStatistics Valid=1776, Invalid=6966, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 07:07:37,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91319 states. [2021-06-05 07:07:38,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91319 to 49212. [2021-06-05 07:07:38,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49212 states, 49211 states have (on average 3.5392087134990144) internal successors, (174168), 49211 states have internal predecessors, (174168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:39,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49212 states to 49212 states and 174168 transitions. [2021-06-05 07:07:39,053 INFO L78 Accepts]: Start accepts. Automaton has 49212 states and 174168 transitions. Word has length 38 [2021-06-05 07:07:39,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:39,053 INFO L482 AbstractCegarLoop]: Abstraction has 49212 states and 174168 transitions. [2021-06-05 07:07:39,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:39,053 INFO L276 IsEmpty]: Start isEmpty. Operand 49212 states and 174168 transitions. [2021-06-05 07:07:39,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 07:07:39,117 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:39,117 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:07:39,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:39,317 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:39,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:39,318 INFO L82 PathProgramCache]: Analyzing trace with hash 285815716, now seen corresponding path program 177 times [2021-06-05 07:07:39,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:39,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709964450] [2021-06-05 07:07:39,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:39,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:39,361 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:39,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:39,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709964450] [2021-06-05 07:07:39,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709964450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:39,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585647317] [2021-06-05 07:07:39,361 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:39,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 07:07:39,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:39,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 07:07:39,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:39,716 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:39,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585647317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:39,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:39,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 07:07:39,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906649875] [2021-06-05 07:07:39,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:07:39,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:39,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:07:39,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:07:39,717 INFO L87 Difference]: Start difference. First operand 49212 states and 174168 transitions. Second operand has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:41,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:41,389 INFO L93 Difference]: Finished difference Result 89822 states and 308266 transitions. [2021-06-05 07:07:41,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-06-05 07:07:41,390 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have 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 07:07:41,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:41,577 INFO L225 Difference]: With dead ends: 89822 [2021-06-05 07:07:41,577 INFO L226 Difference]: Without dead ends: 89810 [2021-06-05 07:07:41,578 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3114 ImplicationChecksByTransitivity, 1039.8ms TimeCoverageRelationStatistics Valid=1756, Invalid=6616, Unknown=0, NotChecked=0, Total=8372 [2021-06-05 07:07:41,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89810 states. [2021-06-05 07:07:42,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89810 to 49210. [2021-06-05 07:07:42,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49210 states, 49209 states have (on average 3.539250950029466) internal successors, (174163), 49209 states have internal predecessors, (174163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:43,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49210 states to 49210 states and 174163 transitions. [2021-06-05 07:07:43,093 INFO L78 Accepts]: Start accepts. Automaton has 49210 states and 174163 transitions. Word has length 38 [2021-06-05 07:07:43,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:43,093 INFO L482 AbstractCegarLoop]: Abstraction has 49210 states and 174163 transitions. [2021-06-05 07:07:43,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:43,093 INFO L276 IsEmpty]: Start isEmpty. Operand 49210 states and 174163 transitions. [2021-06-05 07:07:43,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 07:07:43,154 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:43,154 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:07:43,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-06-05 07:07:43,355 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:43,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:43,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1137058970, now seen corresponding path program 178 times [2021-06-05 07:07:43,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:43,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655642332] [2021-06-05 07:07:43,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:43,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:43,398 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:43,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:43,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655642332] [2021-06-05 07:07:43,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655642332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:43,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356645743] [2021-06-05 07:07:43,399 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:43,421 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:07:43,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:43,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 07:07:43,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:43,547 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:43,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356645743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:43,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:43,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 07:07:43,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218020919] [2021-06-05 07:07:43,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:07:43,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:43,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:07:43,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:07:43,548 INFO L87 Difference]: Start difference. First operand 49210 states and 174163 transitions. Second operand has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 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 07:07:45,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:45,619 INFO L93 Difference]: Finished difference Result 109614 states and 376471 transitions. [2021-06-05 07:07:45,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-06-05 07:07:45,620 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 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 38 [2021-06-05 07:07:45,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:45,865 INFO L225 Difference]: With dead ends: 109614 [2021-06-05 07:07:45,865 INFO L226 Difference]: Without dead ends: 109614 [2021-06-05 07:07:45,865 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4548 ImplicationChecksByTransitivity, 961.8ms TimeCoverageRelationStatistics Valid=2218, Invalid=8912, Unknown=0, NotChecked=0, Total=11130 [2021-06-05 07:07:45,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109614 states. [2021-06-05 07:07:47,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109614 to 49314. [2021-06-05 07:07:47,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49314 states, 49313 states have (on average 3.5432847322207124) internal successors, (174730), 49313 states have internal predecessors, (174730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:47,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49314 states to 49314 states and 174730 transitions. [2021-06-05 07:07:47,785 INFO L78 Accepts]: Start accepts. Automaton has 49314 states and 174730 transitions. Word has length 38 [2021-06-05 07:07:47,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:47,785 INFO L482 AbstractCegarLoop]: Abstraction has 49314 states and 174730 transitions. [2021-06-05 07:07:47,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 19 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 07:07:47,785 INFO L276 IsEmpty]: Start isEmpty. Operand 49314 states and 174730 transitions. [2021-06-05 07:07:47,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 07:07:47,852 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:47,852 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:07:48,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable213,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:48,052 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:48,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:48,053 INFO L82 PathProgramCache]: Analyzing trace with hash 129485782, now seen corresponding path program 179 times [2021-06-05 07:07:48,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:48,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644173396] [2021-06-05 07:07:48,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:48,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:48,095 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:48,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:48,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644173396] [2021-06-05 07:07:48,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644173396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:48,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185233907] [2021-06-05 07:07:48,095 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:48,122 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 07:07:48,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:48,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 07:07:48,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:48,249 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:48,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185233907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:48,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:48,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 07:07:48,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803689366] [2021-06-05 07:07:48,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:07:48,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:48,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:07:48,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:07:48,250 INFO L87 Difference]: Start difference. First operand 49314 states and 174730 transitions. Second operand has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:50,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:50,345 INFO L93 Difference]: Finished difference Result 110094 states and 377678 transitions. [2021-06-05 07:07:50,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-06-05 07:07:50,345 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have 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 07:07:50,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:50,599 INFO L225 Difference]: With dead ends: 110094 [2021-06-05 07:07:50,599 INFO L226 Difference]: Without dead ends: 110094 [2021-06-05 07:07:50,599 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4544 ImplicationChecksByTransitivity, 959.8ms TimeCoverageRelationStatistics Valid=2218, Invalid=8912, Unknown=0, NotChecked=0, Total=11130 [2021-06-05 07:07:50,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110094 states. [2021-06-05 07:07:52,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110094 to 49260. [2021-06-05 07:07:52,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49260 states, 49259 states have (on average 3.541078787632717) internal successors, (174430), 49259 states have internal predecessors, (174430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:52,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49260 states to 49260 states and 174430 transitions. [2021-06-05 07:07:52,522 INFO L78 Accepts]: Start accepts. Automaton has 49260 states and 174430 transitions. Word has length 38 [2021-06-05 07:07:52,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:52,522 INFO L482 AbstractCegarLoop]: Abstraction has 49260 states and 174430 transitions. [2021-06-05 07:07:52,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:52,522 INFO L276 IsEmpty]: Start isEmpty. Operand 49260 states and 174430 transitions. [2021-06-05 07:07:52,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 07:07:52,590 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:52,590 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:07:52,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2021-06-05 07:07:52,790 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:52,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:52,790 INFO L82 PathProgramCache]: Analyzing trace with hash -990511256, now seen corresponding path program 180 times [2021-06-05 07:07:52,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:52,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831733120] [2021-06-05 07:07:52,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:52,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:52,833 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:52,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:52,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831733120] [2021-06-05 07:07:52,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831733120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:52,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909004846] [2021-06-05 07:07:52,833 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:52,858 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 07:07:52,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:07:52,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 07:07:52,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:52,971 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:52,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909004846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:52,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:52,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 07:07:52,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312191220] [2021-06-05 07:07:52,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:07:52,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:52,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:07:52,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:07:52,972 INFO L87 Difference]: Start difference. First operand 49260 states and 174430 transitions. Second operand has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 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 07:07:54,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:54,831 INFO L93 Difference]: Finished difference Result 90915 states and 311288 transitions. [2021-06-05 07:07:54,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-06-05 07:07:54,832 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 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 38 [2021-06-05 07:07:54,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:55,016 INFO L225 Difference]: With dead ends: 90915 [2021-06-05 07:07:55,016 INFO L226 Difference]: Without dead ends: 90903 [2021-06-05 07:07:55,017 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3140 ImplicationChecksByTransitivity, 771.6ms TimeCoverageRelationStatistics Valid=1702, Invalid=6670, Unknown=0, NotChecked=0, Total=8372 [2021-06-05 07:07:55,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90903 states. [2021-06-05 07:07:56,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90903 to 49268. [2021-06-05 07:07:56,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49268 states, 49267 states have (on average 3.5411127123632453) internal successors, (174460), 49267 states have internal predecessors, (174460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:07:56,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49268 states to 49268 states and 174460 transitions. [2021-06-05 07:07:56,534 INFO L78 Accepts]: Start accepts. Automaton has 49268 states and 174460 transitions. Word has length 38 [2021-06-05 07:07:56,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:07:56,535 INFO L482 AbstractCegarLoop]: Abstraction has 49268 states and 174460 transitions. [2021-06-05 07:07:56,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 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 07:07:56,535 INFO L276 IsEmpty]: Start isEmpty. Operand 49268 states and 174460 transitions. [2021-06-05 07:07:56,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 07:07:56,606 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:07:56,606 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:07:56,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:56,807 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:07:56,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:07:56,807 INFO L82 PathProgramCache]: Analyzing trace with hash -720001564, now seen corresponding path program 181 times [2021-06-05 07:07:56,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:07:56,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710053548] [2021-06-05 07:07:56,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:07:56,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:56,851 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:56,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:07:56,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710053548] [2021-06-05 07:07:56,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710053548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:56,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250373843] [2021-06-05 07:07:56,851 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:07:56,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:07:56,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 07:07:56,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:07:56,988 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:07:56,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250373843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:07:56,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:07:56,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 07:07:56,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805479858] [2021-06-05 07:07:56,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:07:56,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:07:56,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:07:56,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:07:56,989 INFO L87 Difference]: Start difference. First operand 49268 states and 174460 transitions. Second operand has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 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 07:07:57,465 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-06-05 07:07:58,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:07:58,841 INFO L93 Difference]: Finished difference Result 92540 states and 315646 transitions. [2021-06-05 07:07:58,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-06-05 07:07:58,842 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 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 38 [2021-06-05 07:07:58,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:07:59,031 INFO L225 Difference]: With dead ends: 92540 [2021-06-05 07:07:59,031 INFO L226 Difference]: Without dead ends: 92540 [2021-06-05 07:07:59,032 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3584 ImplicationChecksByTransitivity, 961.6ms TimeCoverageRelationStatistics Valid=1747, Invalid=7183, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 07:07:59,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92540 states. [2021-06-05 07:08:00,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92540 to 49268. [2021-06-05 07:08:00,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49268 states, 49267 states have (on average 3.541153307487771) internal successors, (174462), 49267 states have internal predecessors, (174462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:00,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49268 states to 49268 states and 174462 transitions. [2021-06-05 07:08:00,662 INFO L78 Accepts]: Start accepts. Automaton has 49268 states and 174462 transitions. Word has length 38 [2021-06-05 07:08:00,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:00,662 INFO L482 AbstractCegarLoop]: Abstraction has 49268 states and 174462 transitions. [2021-06-05 07:08:00,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 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 07:08:00,662 INFO L276 IsEmpty]: Start isEmpty. Operand 49268 states and 174462 transitions. [2021-06-05 07:08:00,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 07:08:00,723 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:00,723 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:00,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-06-05 07:08:00,924 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:00,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:00,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1686399906, now seen corresponding path program 182 times [2021-06-05 07:08:00,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:00,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84880826] [2021-06-05 07:08:00,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:00,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:00,970 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:00,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:00,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84880826] [2021-06-05 07:08:00,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84880826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:00,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250419891] [2021-06-05 07:08:00,971 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:08:00,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:08:00,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:00,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 07:08:00,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:01,133 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:01,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250419891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:01,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:01,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-05 07:08:01,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842924078] [2021-06-05 07:08:01,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 07:08:01,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:01,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 07:08:01,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-06-05 07:08:01,134 INFO L87 Difference]: Start difference. First operand 49268 states and 174462 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:03,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:03,571 INFO L93 Difference]: Finished difference Result 88067 states and 300466 transitions. [2021-06-05 07:08:03,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-06-05 07:08:03,571 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have 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 07:08:03,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:03,751 INFO L225 Difference]: With dead ends: 88067 [2021-06-05 07:08:03,752 INFO L226 Difference]: Without dead ends: 88067 [2021-06-05 07:08:03,753 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7081 ImplicationChecksByTransitivity, 1308.8ms TimeCoverageRelationStatistics Valid=2921, Invalid=14109, Unknown=0, NotChecked=0, Total=17030 [2021-06-05 07:08:03,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88067 states. [2021-06-05 07:08:05,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88067 to 49362. [2021-06-05 07:08:05,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49362 states, 49361 states have (on average 3.540305099167359) internal successors, (174753), 49361 states have internal predecessors, (174753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:05,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49362 states to 49362 states and 174753 transitions. [2021-06-05 07:08:05,475 INFO L78 Accepts]: Start accepts. Automaton has 49362 states and 174753 transitions. Word has length 38 [2021-06-05 07:08:05,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:08:05,475 INFO L482 AbstractCegarLoop]: Abstraction has 49362 states and 174753 transitions. [2021-06-05 07:08:05,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:05,475 INFO L276 IsEmpty]: Start isEmpty. Operand 49362 states and 174753 transitions. [2021-06-05 07:08:05,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 07:08:05,543 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:08:05,543 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:08:05,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-06-05 07:08:05,744 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 07:08:05,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:08:05,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1553189996, now seen corresponding path program 183 times [2021-06-05 07:08:05,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:08:05,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628796789] [2021-06-05 07:08:05,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:08:05,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:08:05,788 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:05,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:08:05,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628796789] [2021-06-05 07:08:05,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628796789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:05,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741104775] [2021-06-05 07:08:05,788 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:08:05,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 07:08:05,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:08:05,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 07:08:05,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:08:05,947 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:08:05,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741104775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:08:05,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:08:05,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-05 07:08:05,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116527078] [2021-06-05 07:08:05,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 07:08:05,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:08:05,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 07:08:05,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-06-05 07:08:05,948 INFO L87 Difference]: Start difference. First operand 49362 states and 174753 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:08:08,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:08:08,210 INFO L93 Difference]: Finished difference Result 86322 states and 295792 transitions. [2021-06-05 07:08:08,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-06-05 07:08:08,211 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have 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 07:08:08,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:08:08,373 INFO L225 Difference]: With dead ends: 86322 [2021-06-05 07:08:08,373 INFO L226 Difference]: Without dead ends: 86314 [2021-06-05 07:08:08,374 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5591 ImplicationChecksByTransitivity, 1198.8ms TimeCoverageRelationStatistics Valid=2550, Invalid=11492, Unknown=0, NotChecked=0, Total=14042 [2021-06-05 07:08:08,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86314 states.