/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy CAMEL_NO_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/cggmp2005b.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-19 21:46:59,553 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-19 21:46:59,556 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-19 21:46:59,574 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-19 21:46:59,575 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-19 21:46:59,577 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-19 21:46:59,578 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-19 21:46:59,588 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-19 21:46:59,591 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-19 21:46:59,594 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-19 21:46:59,596 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-19 21:46:59,598 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-19 21:46:59,598 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-19 21:46:59,600 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-19 21:46:59,602 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-19 21:46:59,603 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-19 21:46:59,604 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-19 21:46:59,605 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-19 21:46:59,606 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-19 21:46:59,611 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-19 21:46:59,615 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-19 21:46:59,620 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-19 21:46:59,622 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-19 21:46:59,623 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-19 21:46:59,625 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-19 21:46:59,636 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-19 21:46:59,637 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-19 21:46:59,637 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-19 21:46:59,638 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-19 21:46:59,677 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-19 21:46:59,678 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-19 21:46:59,679 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-19 21:46:59,685 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-19 21:46:59,685 INFO L138 SettingsManager]: * Use SBE=true [2020-07-19 21:46:59,686 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-19 21:46:59,686 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-19 21:46:59,686 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-19 21:46:59,686 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-19 21:46:59,686 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-19 21:46:59,687 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-19 21:46:59,687 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-19 21:46:59,687 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-19 21:46:59,687 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-19 21:46:59,687 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-19 21:46:59,688 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-19 21:46:59,688 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-19 21:46:59,688 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-19 21:46:59,688 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-19 21:46:59,688 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-19 21:46:59,689 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-19 21:46:59,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 21:46:59,689 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-19 21:46:59,689 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-19 21:46:59,689 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-19 21:46:59,690 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-19 21:46:59,690 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-19 21:46:59,690 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-19 21:46:59,692 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-19 21:46:59,692 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_NO_AM [2020-07-19 21:46:59,961 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-19 21:46:59,974 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-19 21:46:59,978 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-19 21:46:59,979 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-19 21:46:59,979 INFO L275 PluginConnector]: CDTParser initialized [2020-07-19 21:46:59,980 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/cggmp2005b.i [2020-07-19 21:47:00,039 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad4291861/1cc1de1235e24ef38ed813fda76114ea/FLAG1a1da3ad9 [2020-07-19 21:47:00,509 INFO L306 CDTParser]: Found 1 translation units. [2020-07-19 21:47:00,510 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/cggmp2005b.i [2020-07-19 21:47:00,517 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad4291861/1cc1de1235e24ef38ed813fda76114ea/FLAG1a1da3ad9 [2020-07-19 21:47:00,916 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad4291861/1cc1de1235e24ef38ed813fda76114ea [2020-07-19 21:47:00,925 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-19 21:47:00,927 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-19 21:47:00,928 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-19 21:47:00,929 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-19 21:47:00,933 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-19 21:47:00,934 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:47:00" (1/1) ... [2020-07-19 21:47:00,941 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bd9468f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:47:00, skipping insertion in model container [2020-07-19 21:47:00,941 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:47:00" (1/1) ... [2020-07-19 21:47:00,949 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-19 21:47:00,965 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-19 21:47:01,110 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 21:47:01,114 INFO L203 MainTranslator]: Completed pre-run [2020-07-19 21:47:01,128 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 21:47:01,141 INFO L208 MainTranslator]: Completed translation [2020-07-19 21:47:01,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:47:01 WrapperNode [2020-07-19 21:47:01,142 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-19 21:47:01,142 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-19 21:47:01,142 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-19 21:47:01,143 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-19 21:47:01,152 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:47:01" (1/1) ... [2020-07-19 21:47:01,152 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:47:01" (1/1) ... [2020-07-19 21:47:01,157 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:47:01" (1/1) ... [2020-07-19 21:47:01,157 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:47:01" (1/1) ... [2020-07-19 21:47:01,160 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:47:01" (1/1) ... [2020-07-19 21:47:01,164 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:47:01" (1/1) ... [2020-07-19 21:47:01,165 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:47:01" (1/1) ... [2020-07-19 21:47:01,254 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-19 21:47:01,255 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-19 21:47:01,255 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-19 21:47:01,255 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-19 21:47:01,256 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:47:01" (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 [2020-07-19 21:47:01,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-19 21:47:01,321 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-19 21:47:01,321 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-19 21:47:01,321 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-19 21:47:01,321 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-19 21:47:01,321 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-19 21:47:01,321 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-19 21:47:01,322 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-19 21:47:01,322 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-19 21:47:01,322 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-19 21:47:01,322 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-19 21:47:01,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-19 21:47:01,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-19 21:47:01,526 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-19 21:47:01,526 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-19 21:47:01,529 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:47:01 BoogieIcfgContainer [2020-07-19 21:47:01,530 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-19 21:47:01,530 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-19 21:47:01,531 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-19 21:47:01,533 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-19 21:47:01,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:47:00" (1/3) ... [2020-07-19 21:47:01,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4265fba5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:47:01, skipping insertion in model container [2020-07-19 21:47:01,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:47:01" (2/3) ... [2020-07-19 21:47:01,535 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4265fba5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:47:01, skipping insertion in model container [2020-07-19 21:47:01,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:47:01" (3/3) ... [2020-07-19 21:47:01,537 INFO L109 eAbstractionObserver]: Analyzing ICFG cggmp2005b.i [2020-07-19 21:47:01,548 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-19 21:47:01,560 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-19 21:47:01,576 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-19 21:47:01,606 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-19 21:47:01,607 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-19 21:47:01,607 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-19 21:47:01,607 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-19 21:47:01,607 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-19 21:47:01,607 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-19 21:47:01,608 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-19 21:47:01,608 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-19 21:47:01,633 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-07-19 21:47:01,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-19 21:47:01,643 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:47:01,644 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:47:01,644 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:47:01,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:47:01,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1039733575, now seen corresponding path program 1 times [2020-07-19 21:47:01,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:47:01,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458304464] [2020-07-19 21:47:01,657 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79017fda [2020-07-19 21:47:01,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:01,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:01,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:47:01,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458304464] [2020-07-19 21:47:01,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:47:01,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-19 21:47:01,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670311474] [2020-07-19 21:47:01,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-19 21:47:01,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:47:01,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-19 21:47:01,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-19 21:47:01,774 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-07-19 21:47:01,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:47:01,795 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2020-07-19 21:47:01,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-19 21:47:01,797 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-19 21:47:01,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:47:01,806 INFO L225 Difference]: With dead ends: 37 [2020-07-19 21:47:01,806 INFO L226 Difference]: Without dead ends: 14 [2020-07-19 21:47:01,810 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-19 21:47:01,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-07-19 21:47:01,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-07-19 21:47:01,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-07-19 21:47:01,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-07-19 21:47:01,844 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2020-07-19 21:47:01,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:47:01,845 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-07-19 21:47:01,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-19 21:47:01,845 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-07-19 21:47:01,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-19 21:47:01,846 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:47:01,846 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:47:01,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-19 21:47:01,847 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:47:01,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:47:01,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1066515684, now seen corresponding path program 1 times [2020-07-19 21:47:01,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:47:01,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973156095] [2020-07-19 21:47:01,848 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79017fda [2020-07-19 21:47:01,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:01,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:01,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:47:01,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973156095] [2020-07-19 21:47:01,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:47:01,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-19 21:47:01,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95777931] [2020-07-19 21:47:01,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-19 21:47:01,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:47:01,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-19 21:47:01,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:47:01,903 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 3 states. [2020-07-19 21:47:01,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:47:01,922 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2020-07-19 21:47:01,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 21:47:01,923 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-07-19 21:47:01,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:47:01,924 INFO L225 Difference]: With dead ends: 20 [2020-07-19 21:47:01,924 INFO L226 Difference]: Without dead ends: 15 [2020-07-19 21:47:01,926 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:47:01,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-19 21:47:01,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-19 21:47:01,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-19 21:47:01,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-07-19 21:47:01,932 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 10 [2020-07-19 21:47:01,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:47:01,932 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-07-19 21:47:01,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-19 21:47:01,933 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-07-19 21:47:01,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-19 21:47:01,934 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:47:01,934 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:47:01,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-19 21:47:01,934 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:47:01,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:47:01,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1875131310, now seen corresponding path program 1 times [2020-07-19 21:47:01,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:47:01,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621470551] [2020-07-19 21:47:01,936 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79017fda [2020-07-19 21:47:01,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:01,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:01,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:47:01,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621470551] [2020-07-19 21:47:01,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:47:01,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-19 21:47:01,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791985785] [2020-07-19 21:47:01,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-19 21:47:01,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:47:01,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-19 21:47:01,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:47:01,988 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 3 states. [2020-07-19 21:47:02,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:47:02,025 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2020-07-19 21:47:02,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 21:47:02,026 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-07-19 21:47:02,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:47:02,027 INFO L225 Difference]: With dead ends: 25 [2020-07-19 21:47:02,028 INFO L226 Difference]: Without dead ends: 16 [2020-07-19 21:47:02,029 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:47:02,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-07-19 21:47:02,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-07-19 21:47:02,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-07-19 21:47:02,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-07-19 21:47:02,036 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 14 [2020-07-19 21:47:02,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:47:02,041 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-07-19 21:47:02,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-19 21:47:02,050 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-07-19 21:47:02,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-19 21:47:02,052 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:47:02,052 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:47:02,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-19 21:47:02,053 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:47:02,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:47:02,056 INFO L82 PathProgramCache]: Analyzing trace with hash -224898986, now seen corresponding path program 1 times [2020-07-19 21:47:02,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:47:02,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038884427] [2020-07-19 21:47:02,058 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79017fda [2020-07-19 21:47:02,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:02,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:02,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:47:02,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038884427] [2020-07-19 21:47:02,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794783427] [2020-07-19 21:47:02,129 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79017fda 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 [2020-07-19 21:47:02,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:02,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-19 21:47:02,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:47:02,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-19 21:47:02,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:47:02,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2020-07-19 21:47:02,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579216591] [2020-07-19 21:47:02,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-19 21:47:02,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:47:02,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-19 21:47:02,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-19 21:47:02,261 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 7 states. [2020-07-19 21:47:02,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:47:02,355 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2020-07-19 21:47:02,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-19 21:47:02,356 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-07-19 21:47:02,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:47:02,357 INFO L225 Difference]: With dead ends: 30 [2020-07-19 21:47:02,357 INFO L226 Difference]: Without dead ends: 21 [2020-07-19 21:47:02,358 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-07-19 21:47:02,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-19 21:47:02,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-19 21:47:02,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-19 21:47:02,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-19 21:47:02,365 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 15 [2020-07-19 21:47:02,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:47:02,365 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-19 21:47:02,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-19 21:47:02,365 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-19 21:47:02,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-19 21:47:02,366 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:47:02,366 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:47:02,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:47:02,581 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:47:02,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:47:02,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1734889408, now seen corresponding path program 2 times [2020-07-19 21:47:02,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:47:02,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222410873] [2020-07-19 21:47:02,584 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79017fda [2020-07-19 21:47:02,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:02,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:02,668 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-19 21:47:02,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222410873] [2020-07-19 21:47:02,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100988122] [2020-07-19 21:47:02,669 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79017fda 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 [2020-07-19 21:47:02,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:02,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-19 21:47:02,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:47:02,771 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-19 21:47:02,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:47:02,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2020-07-19 21:47:02,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862383521] [2020-07-19 21:47:02,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-19 21:47:02,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:47:02,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-19 21:47:02,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-07-19 21:47:02,774 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 9 states. [2020-07-19 21:47:02,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:47:02,842 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2020-07-19 21:47:02,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-19 21:47:02,844 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-07-19 21:47:02,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:47:02,845 INFO L225 Difference]: With dead ends: 34 [2020-07-19 21:47:02,845 INFO L226 Difference]: Without dead ends: 22 [2020-07-19 21:47:02,846 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2020-07-19 21:47:02,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-19 21:47:02,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-07-19 21:47:02,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-19 21:47:02,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-07-19 21:47:02,853 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 20 [2020-07-19 21:47:02,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:47:02,853 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-07-19 21:47:02,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-19 21:47:02,854 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-07-19 21:47:02,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-19 21:47:02,854 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:47:02,855 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:47:03,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:47:03,068 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:47:03,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:47:03,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1612949224, now seen corresponding path program 3 times [2020-07-19 21:47:03,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:47:03,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110403490] [2020-07-19 21:47:03,070 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79017fda [2020-07-19 21:47:03,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:03,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:03,173 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-19 21:47:03,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110403490] [2020-07-19 21:47:03,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917576502] [2020-07-19 21:47:03,174 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79017fda 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 [2020-07-19 21:47:03,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:03,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-19 21:47:03,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:47:03,283 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-19 21:47:03,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:47:03,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2020-07-19 21:47:03,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119264867] [2020-07-19 21:47:03,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-19 21:47:03,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:47:03,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-19 21:47:03,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-07-19 21:47:03,285 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 11 states. [2020-07-19 21:47:03,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:47:03,372 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2020-07-19 21:47:03,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-19 21:47:03,373 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2020-07-19 21:47:03,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:47:03,374 INFO L225 Difference]: With dead ends: 35 [2020-07-19 21:47:03,374 INFO L226 Difference]: Without dead ends: 23 [2020-07-19 21:47:03,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-07-19 21:47:03,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-19 21:47:03,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-19 21:47:03,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-19 21:47:03,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-07-19 21:47:03,380 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 21 [2020-07-19 21:47:03,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:47:03,380 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-07-19 21:47:03,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-19 21:47:03,381 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-07-19 21:47:03,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-19 21:47:03,382 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:47:03,382 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:47:03,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:47:03,594 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:47:03,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:47:03,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1978235584, now seen corresponding path program 4 times [2020-07-19 21:47:03,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:47:03,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160110588] [2020-07-19 21:47:03,596 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79017fda [2020-07-19 21:47:03,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:03,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:03,663 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-19 21:47:03,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160110588] [2020-07-19 21:47:03,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917723397] [2020-07-19 21:47:03,664 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79017fda 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 [2020-07-19 21:47:03,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:03,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-19 21:47:03,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:47:03,817 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-19 21:47:03,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:47:03,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2020-07-19 21:47:03,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589532412] [2020-07-19 21:47:03,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-19 21:47:03,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:47:03,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-19 21:47:03,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-07-19 21:47:03,819 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 13 states. [2020-07-19 21:47:03,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:47:03,939 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-19 21:47:03,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-19 21:47:03,940 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 22 [2020-07-19 21:47:03,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:47:03,941 INFO L225 Difference]: With dead ends: 36 [2020-07-19 21:47:03,941 INFO L226 Difference]: Without dead ends: 24 [2020-07-19 21:47:03,942 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-07-19 21:47:03,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-19 21:47:03,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-19 21:47:03,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-19 21:47:03,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-07-19 21:47:03,947 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 22 [2020-07-19 21:47:03,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:47:03,947 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-07-19 21:47:03,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-19 21:47:03,948 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-07-19 21:47:03,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-19 21:47:03,949 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:47:03,949 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:47:04,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:47:04,159 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:47:04,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:47:04,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1635814936, now seen corresponding path program 5 times [2020-07-19 21:47:04,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:47:04,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977636244] [2020-07-19 21:47:04,161 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79017fda [2020-07-19 21:47:04,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:04,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:04,231 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-19 21:47:04,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977636244] [2020-07-19 21:47:04,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853828599] [2020-07-19 21:47:04,232 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79017fda 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 [2020-07-19 21:47:04,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:04,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-19 21:47:04,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:47:04,436 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-19 21:47:04,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:47:04,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-07-19 21:47:04,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362974831] [2020-07-19 21:47:04,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-19 21:47:04,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:47:04,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-19 21:47:04,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-07-19 21:47:04,440 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 15 states. [2020-07-19 21:47:04,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:47:04,621 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2020-07-19 21:47:04,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-19 21:47:04,624 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 23 [2020-07-19 21:47:04,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:47:04,627 INFO L225 Difference]: With dead ends: 37 [2020-07-19 21:47:04,627 INFO L226 Difference]: Without dead ends: 25 [2020-07-19 21:47:04,628 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2020-07-19 21:47:04,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-19 21:47:04,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-07-19 21:47:04,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-19 21:47:04,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-07-19 21:47:04,635 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 23 [2020-07-19 21:47:04,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:47:04,636 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-07-19 21:47:04,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-19 21:47:04,636 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-07-19 21:47:04,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-19 21:47:04,637 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:47:04,637 INFO L422 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:47:04,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:47:04,858 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:47:04,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:47:04,859 INFO L82 PathProgramCache]: Analyzing trace with hash 389290560, now seen corresponding path program 6 times [2020-07-19 21:47:04,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:47:04,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023777008] [2020-07-19 21:47:04,860 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79017fda [2020-07-19 21:47:04,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:04,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:04,921 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-19 21:47:04,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023777008] [2020-07-19 21:47:04,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987864880] [2020-07-19 21:47:04,922 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79017fda 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 [2020-07-19 21:47:04,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:04,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-19 21:47:04,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:47:05,101 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-19 21:47:05,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:47:05,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 10] total 13 [2020-07-19 21:47:05,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120092312] [2020-07-19 21:47:05,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-19 21:47:05,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:47:05,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-19 21:47:05,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-07-19 21:47:05,105 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 13 states. [2020-07-19 21:47:05,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:47:05,319 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2020-07-19 21:47:05,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-19 21:47:05,322 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2020-07-19 21:47:05,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:47:05,323 INFO L225 Difference]: With dead ends: 42 [2020-07-19 21:47:05,323 INFO L226 Difference]: Without dead ends: 30 [2020-07-19 21:47:05,324 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=240, Unknown=0, NotChecked=0, Total=380 [2020-07-19 21:47:05,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-19 21:47:05,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-19 21:47:05,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-19 21:47:05,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2020-07-19 21:47:05,337 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 24 [2020-07-19 21:47:05,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:47:05,338 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2020-07-19 21:47:05,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-19 21:47:05,338 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2020-07-19 21:47:05,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-19 21:47:05,340 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:47:05,340 INFO L422 BasicCegarLoop]: trace histogram [7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:47:05,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:47:05,556 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:47:05,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:47:05,556 INFO L82 PathProgramCache]: Analyzing trace with hash -807358598, now seen corresponding path program 7 times [2020-07-19 21:47:05,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:47:05,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003284418] [2020-07-19 21:47:05,557 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79017fda [2020-07-19 21:47:05,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:05,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:05,617 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-07-19 21:47:05,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003284418] [2020-07-19 21:47:05,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659236611] [2020-07-19 21:47:05,618 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79017fda 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) [2020-07-19 21:47:05,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:05,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-19 21:47:05,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:47:05,765 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 19 proven. 28 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-07-19 21:47:05,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:47:05,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11] total 15 [2020-07-19 21:47:05,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339438998] [2020-07-19 21:47:05,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-19 21:47:05,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:47:05,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-19 21:47:05,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-07-19 21:47:05,767 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 15 states. [2020-07-19 21:47:06,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:47:06,040 INFO L93 Difference]: Finished difference Result 51 states and 66 transitions. [2020-07-19 21:47:06,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-19 21:47:06,042 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 29 [2020-07-19 21:47:06,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:47:06,043 INFO L225 Difference]: With dead ends: 51 [2020-07-19 21:47:06,043 INFO L226 Difference]: Without dead ends: 35 [2020-07-19 21:47:06,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=187, Invalid=319, Unknown=0, NotChecked=0, Total=506 [2020-07-19 21:47:06,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-19 21:47:06,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-07-19 21:47:06,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-19 21:47:06,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2020-07-19 21:47:06,052 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 29 [2020-07-19 21:47:06,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:47:06,054 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2020-07-19 21:47:06,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-19 21:47:06,054 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2020-07-19 21:47:06,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-19 21:47:06,057 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:47:06,057 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:47:06,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-07-19 21:47:06,259 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:47:06,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:47:06,259 INFO L82 PathProgramCache]: Analyzing trace with hash -655531164, now seen corresponding path program 8 times [2020-07-19 21:47:06,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:47:06,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597486421] [2020-07-19 21:47:06,261 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79017fda [2020-07-19 21:47:06,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:06,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:06,363 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 31 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-19 21:47:06,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597486421] [2020-07-19 21:47:06,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570352686] [2020-07-19 21:47:06,364 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79017fda 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 [2020-07-19 21:47:06,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:06,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-19 21:47:06,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:47:06,642 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 31 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-19 21:47:06,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:47:06,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-07-19 21:47:06,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303750269] [2020-07-19 21:47:06,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-19 21:47:06,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:47:06,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-19 21:47:06,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2020-07-19 21:47:06,645 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand 21 states. [2020-07-19 21:47:06,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:47:06,925 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2020-07-19 21:47:06,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-19 21:47:06,927 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 34 [2020-07-19 21:47:06,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:47:06,927 INFO L225 Difference]: With dead ends: 56 [2020-07-19 21:47:06,928 INFO L226 Difference]: Without dead ends: 36 [2020-07-19 21:47:06,929 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=235, Invalid=577, Unknown=0, NotChecked=0, Total=812 [2020-07-19 21:47:06,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-19 21:47:06,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-19 21:47:06,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-19 21:47:06,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2020-07-19 21:47:06,940 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 34 [2020-07-19 21:47:06,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:47:06,940 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2020-07-19 21:47:06,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-19 21:47:06,941 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2020-07-19 21:47:06,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-07-19 21:47:06,941 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:47:06,942 INFO L422 BasicCegarLoop]: trace histogram [9, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:47:07,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-07-19 21:47:07,150 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:47:07,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:47:07,150 INFO L82 PathProgramCache]: Analyzing trace with hash -514812916, now seen corresponding path program 9 times [2020-07-19 21:47:07,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:47:07,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925603893] [2020-07-19 21:47:07,152 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79017fda [2020-07-19 21:47:07,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:07,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:07,287 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 34 proven. 45 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-19 21:47:07,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925603893] [2020-07-19 21:47:07,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908332519] [2020-07-19 21:47:07,288 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79017fda 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 [2020-07-19 21:47:07,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:07,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-19 21:47:07,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:47:07,563 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 34 proven. 45 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-19 21:47:07,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:47:07,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2020-07-19 21:47:07,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089755805] [2020-07-19 21:47:07,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-19 21:47:07,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:47:07,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-19 21:47:07,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-07-19 21:47:07,566 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand 23 states. [2020-07-19 21:47:07,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:47:07,877 INFO L93 Difference]: Finished difference Result 57 states and 73 transitions. [2020-07-19 21:47:07,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-19 21:47:07,880 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-07-19 21:47:07,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:47:07,881 INFO L225 Difference]: With dead ends: 57 [2020-07-19 21:47:07,882 INFO L226 Difference]: Without dead ends: 37 [2020-07-19 21:47:07,882 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=281, Invalid=711, Unknown=0, NotChecked=0, Total=992 [2020-07-19 21:47:07,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-19 21:47:07,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-07-19 21:47:07,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-19 21:47:07,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2020-07-19 21:47:07,888 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 35 [2020-07-19 21:47:07,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:47:07,888 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2020-07-19 21:47:07,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-19 21:47:07,889 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2020-07-19 21:47:07,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-19 21:47:07,890 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:47:07,890 INFO L422 BasicCegarLoop]: trace histogram [10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:47:08,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:47:08,104 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:47:08,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:47:08,105 INFO L82 PathProgramCache]: Analyzing trace with hash -447514524, now seen corresponding path program 10 times [2020-07-19 21:47:08,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:47:08,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844393765] [2020-07-19 21:47:08,106 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79017fda [2020-07-19 21:47:08,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:08,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:08,241 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 37 proven. 55 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-19 21:47:08,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844393765] [2020-07-19 21:47:08,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961350747] [2020-07-19 21:47:08,242 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79017fda 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 [2020-07-19 21:47:08,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:08,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-19 21:47:08,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:47:08,564 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 37 proven. 55 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-19 21:47:08,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:47:08,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2020-07-19 21:47:08,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166736482] [2020-07-19 21:47:08,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-19 21:47:08,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:47:08,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-19 21:47:08,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2020-07-19 21:47:08,567 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 25 states. [2020-07-19 21:47:08,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:47:08,907 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2020-07-19 21:47:08,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-19 21:47:08,908 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 36 [2020-07-19 21:47:08,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:47:08,909 INFO L225 Difference]: With dead ends: 58 [2020-07-19 21:47:08,909 INFO L226 Difference]: Without dead ends: 38 [2020-07-19 21:47:08,911 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=331, Invalid=859, Unknown=0, NotChecked=0, Total=1190 [2020-07-19 21:47:08,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-19 21:47:08,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-07-19 21:47:08,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-19 21:47:08,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2020-07-19 21:47:08,917 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 36 [2020-07-19 21:47:08,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:47:08,917 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2020-07-19 21:47:08,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-19 21:47:08,917 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2020-07-19 21:47:08,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-19 21:47:08,918 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:47:08,918 INFO L422 BasicCegarLoop]: trace histogram [11, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:47:09,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:47:09,132 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:47:09,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:47:09,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1638735628, now seen corresponding path program 11 times [2020-07-19 21:47:09,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:47:09,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995761050] [2020-07-19 21:47:09,134 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79017fda [2020-07-19 21:47:09,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:09,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:09,281 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 40 proven. 66 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-19 21:47:09,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995761050] [2020-07-19 21:47:09,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548942923] [2020-07-19 21:47:09,282 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79017fda 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 [2020-07-19 21:47:09,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:09,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-19 21:47:09,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:47:09,638 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 40 proven. 66 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-19 21:47:09,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:47:09,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2020-07-19 21:47:09,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112525091] [2020-07-19 21:47:09,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-19 21:47:09,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:47:09,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-19 21:47:09,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2020-07-19 21:47:09,641 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 27 states. [2020-07-19 21:47:10,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:47:10,070 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2020-07-19 21:47:10,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-19 21:47:10,075 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 37 [2020-07-19 21:47:10,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:47:10,075 INFO L225 Difference]: With dead ends: 59 [2020-07-19 21:47:10,076 INFO L226 Difference]: Without dead ends: 39 [2020-07-19 21:47:10,077 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=385, Invalid=1021, Unknown=0, NotChecked=0, Total=1406 [2020-07-19 21:47:10,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-19 21:47:10,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-19 21:47:10,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-19 21:47:10,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2020-07-19 21:47:10,083 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 37 [2020-07-19 21:47:10,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:47:10,083 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2020-07-19 21:47:10,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-19 21:47:10,084 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2020-07-19 21:47:10,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-19 21:47:10,084 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:47:10,084 INFO L422 BasicCegarLoop]: trace histogram [12, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:47:10,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-07-19 21:47:10,299 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:47:10,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:47:10,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1887980900, now seen corresponding path program 12 times [2020-07-19 21:47:10,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:47:10,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196998176] [2020-07-19 21:47:10,301 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79017fda [2020-07-19 21:47:10,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:10,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:10,492 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 43 proven. 78 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-19 21:47:10,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196998176] [2020-07-19 21:47:10,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362644712] [2020-07-19 21:47:10,493 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79017fda 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 [2020-07-19 21:47:10,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:10,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-19 21:47:10,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:47:10,920 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 43 proven. 78 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-19 21:47:10,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:47:10,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2020-07-19 21:47:10,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605588299] [2020-07-19 21:47:10,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-19 21:47:10,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:47:10,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-19 21:47:10,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2020-07-19 21:47:10,922 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 29 states. [2020-07-19 21:47:11,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:47:11,370 INFO L93 Difference]: Finished difference Result 60 states and 76 transitions. [2020-07-19 21:47:11,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-19 21:47:11,370 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 38 [2020-07-19 21:47:11,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:47:11,372 INFO L225 Difference]: With dead ends: 60 [2020-07-19 21:47:11,372 INFO L226 Difference]: Without dead ends: 40 [2020-07-19 21:47:11,373 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=443, Invalid=1197, Unknown=0, NotChecked=0, Total=1640 [2020-07-19 21:47:11,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-19 21:47:11,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-07-19 21:47:11,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-19 21:47:11,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2020-07-19 21:47:11,379 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 38 [2020-07-19 21:47:11,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:47:11,379 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2020-07-19 21:47:11,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-19 21:47:11,379 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2020-07-19 21:47:11,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-19 21:47:11,380 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:47:11,380 INFO L422 BasicCegarLoop]: trace histogram [13, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:47:11,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-07-19 21:47:11,585 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:47:11,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:47:11,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1024649740, now seen corresponding path program 13 times [2020-07-19 21:47:11,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:47:11,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743515072] [2020-07-19 21:47:11,587 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79017fda [2020-07-19 21:47:11,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:11,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:11,776 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 46 proven. 91 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-19 21:47:11,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743515072] [2020-07-19 21:47:11,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59942812] [2020-07-19 21:47:11,777 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79017fda 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 [2020-07-19 21:47:11,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:11,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-19 21:47:11,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:47:12,234 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 46 proven. 91 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-19 21:47:12,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:47:12,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2020-07-19 21:47:12,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086290553] [2020-07-19 21:47:12,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-07-19 21:47:12,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:47:12,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-07-19 21:47:12,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=750, Unknown=0, NotChecked=0, Total=930 [2020-07-19 21:47:12,237 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 31 states. [2020-07-19 21:47:12,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:47:12,783 INFO L93 Difference]: Finished difference Result 61 states and 77 transitions. [2020-07-19 21:47:12,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-19 21:47:12,788 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 39 [2020-07-19 21:47:12,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:47:12,789 INFO L225 Difference]: With dead ends: 61 [2020-07-19 21:47:12,789 INFO L226 Difference]: Without dead ends: 41 [2020-07-19 21:47:12,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=505, Invalid=1387, Unknown=0, NotChecked=0, Total=1892 [2020-07-19 21:47:12,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-19 21:47:12,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-07-19 21:47:12,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-19 21:47:12,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2020-07-19 21:47:12,796 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 39 [2020-07-19 21:47:12,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:47:12,796 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2020-07-19 21:47:12,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-07-19 21:47:12,797 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2020-07-19 21:47:12,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-19 21:47:12,797 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:47:12,798 INFO L422 BasicCegarLoop]: trace histogram [14, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:47:13,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-07-19 21:47:13,012 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:47:13,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:47:13,012 INFO L82 PathProgramCache]: Analyzing trace with hash 31187556, now seen corresponding path program 14 times [2020-07-19 21:47:13,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:47:13,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627157340] [2020-07-19 21:47:13,013 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79017fda [2020-07-19 21:47:13,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:13,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:13,257 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 49 proven. 105 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-19 21:47:13,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627157340] [2020-07-19 21:47:13,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630595130] [2020-07-19 21:47:13,258 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79017fda 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) [2020-07-19 21:47:13,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:47:13,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-19 21:47:13,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:47:13,803 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 49 proven. 105 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-19 21:47:13,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:47:13,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2020-07-19 21:47:13,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979511109] [2020-07-19 21:47:13,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-07-19 21:47:13,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:47:13,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-07-19 21:47:13,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=856, Unknown=0, NotChecked=0, Total=1056 [2020-07-19 21:47:13,805 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand 33 states. [2020-07-19 21:47:14,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:47:14,423 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2020-07-19 21:47:14,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-19 21:47:14,424 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 40 [2020-07-19 21:47:14,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:47:14,425 INFO L225 Difference]: With dead ends: 62 [2020-07-19 21:47:14,425 INFO L226 Difference]: Without dead ends: 42 [2020-07-19 21:47:14,426 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=571, Invalid=1591, Unknown=0, NotChecked=0, Total=2162 [2020-07-19 21:47:14,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-19 21:47:14,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-19 21:47:14,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-19 21:47:14,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2020-07-19 21:47:14,443 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 40 [2020-07-19 21:47:14,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:47:14,443 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2020-07-19 21:47:14,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-07-19 21:47:14,444 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2020-07-19 21:47:14,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-19 21:47:14,445 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:47:14,445 INFO L422 BasicCegarLoop]: trace histogram [15, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:47:14,646 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:47:14,647 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:47:14,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:47:14,647 INFO L82 PathProgramCache]: Analyzing trace with hash -701369076, now seen corresponding path program 15 times [2020-07-19 21:47:14,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:47:14,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007317226] [2020-07-19 21:47:14,649 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79017fda [2020-07-19 21:47:14,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:14,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:14,870 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 52 proven. 120 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-19 21:47:14,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007317226] [2020-07-19 21:47:14,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422727629] [2020-07-19 21:47:14,871 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79017fda 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 [2020-07-19 21:47:14,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:14,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-19 21:47:14,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:47:15,436 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 52 proven. 120 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-19 21:47:15,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:47:15,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 35 [2020-07-19 21:47:15,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855093385] [2020-07-19 21:47:15,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-07-19 21:47:15,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:47:15,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-07-19 21:47:15,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=969, Unknown=0, NotChecked=0, Total=1190 [2020-07-19 21:47:15,438 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 35 states. [2020-07-19 21:47:16,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:47:16,151 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2020-07-19 21:47:16,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-19 21:47:16,152 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 41 [2020-07-19 21:47:16,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:47:16,153 INFO L225 Difference]: With dead ends: 63 [2020-07-19 21:47:16,153 INFO L226 Difference]: Without dead ends: 43 [2020-07-19 21:47:16,154 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=641, Invalid=1809, Unknown=0, NotChecked=0, Total=2450 [2020-07-19 21:47:16,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-19 21:47:16,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-07-19 21:47:16,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-19 21:47:16,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2020-07-19 21:47:16,161 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 41 [2020-07-19 21:47:16,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:47:16,162 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2020-07-19 21:47:16,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-07-19 21:47:16,162 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2020-07-19 21:47:16,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-19 21:47:16,163 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:47:16,163 INFO L422 BasicCegarLoop]: trace histogram [16, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:47:16,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-07-19 21:47:16,370 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:47:16,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:47:16,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1935788188, now seen corresponding path program 16 times [2020-07-19 21:47:16,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:47:16,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403778290] [2020-07-19 21:47:16,372 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79017fda [2020-07-19 21:47:16,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:16,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:16,659 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 55 proven. 136 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-19 21:47:16,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403778290] [2020-07-19 21:47:16,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356338700] [2020-07-19 21:47:16,660 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79017fda 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 [2020-07-19 21:47:16,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:16,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-19 21:47:16,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:47:17,355 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 55 proven. 136 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-19 21:47:17,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:47:17,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 37 [2020-07-19 21:47:17,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434505868] [2020-07-19 21:47:17,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-07-19 21:47:17,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:47:17,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-07-19 21:47:17,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1089, Unknown=0, NotChecked=0, Total=1332 [2020-07-19 21:47:17,357 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand 37 states. [2020-07-19 21:47:18,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:47:18,145 INFO L93 Difference]: Finished difference Result 64 states and 80 transitions. [2020-07-19 21:47:18,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-19 21:47:18,145 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 42 [2020-07-19 21:47:18,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:47:18,146 INFO L225 Difference]: With dead ends: 64 [2020-07-19 21:47:18,146 INFO L226 Difference]: Without dead ends: 44 [2020-07-19 21:47:18,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=715, Invalid=2041, Unknown=0, NotChecked=0, Total=2756 [2020-07-19 21:47:18,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-19 21:47:18,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-07-19 21:47:18,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-19 21:47:18,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2020-07-19 21:47:18,152 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 42 [2020-07-19 21:47:18,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:47:18,153 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2020-07-19 21:47:18,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-07-19 21:47:18,153 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2020-07-19 21:47:18,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-19 21:47:18,154 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:47:18,154 INFO L422 BasicCegarLoop]: trace histogram [17, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:47:18,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:47:18,365 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:47:18,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:47:18,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1548074996, now seen corresponding path program 17 times [2020-07-19 21:47:18,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:47:18,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538701478] [2020-07-19 21:47:18,366 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79017fda [2020-07-19 21:47:18,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:18,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:18,687 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 58 proven. 153 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-19 21:47:18,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538701478] [2020-07-19 21:47:18,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382614264] [2020-07-19 21:47:18,687 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79017fda 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 [2020-07-19 21:47:18,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:18,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-19 21:47:18,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:47:19,410 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 58 proven. 153 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-19 21:47:19,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:47:19,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 39 [2020-07-19 21:47:19,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304564309] [2020-07-19 21:47:19,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-07-19 21:47:19,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:47:19,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-07-19 21:47:19,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1216, Unknown=0, NotChecked=0, Total=1482 [2020-07-19 21:47:19,413 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand 39 states. [2020-07-19 21:47:20,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:47:20,285 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2020-07-19 21:47:20,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-19 21:47:20,285 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 43 [2020-07-19 21:47:20,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:47:20,286 INFO L225 Difference]: With dead ends: 65 [2020-07-19 21:47:20,286 INFO L226 Difference]: Without dead ends: 45 [2020-07-19 21:47:20,288 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=793, Invalid=2287, Unknown=0, NotChecked=0, Total=3080 [2020-07-19 21:47:20,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-19 21:47:20,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-07-19 21:47:20,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-19 21:47:20,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2020-07-19 21:47:20,294 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 43 [2020-07-19 21:47:20,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:47:20,294 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2020-07-19 21:47:20,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-07-19 21:47:20,294 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2020-07-19 21:47:20,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-07-19 21:47:20,295 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:47:20,295 INFO L422 BasicCegarLoop]: trace histogram [18, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:47:20,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:47:20,501 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:47:20,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:47:20,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1881099364, now seen corresponding path program 18 times [2020-07-19 21:47:20,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:47:20,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549794471] [2020-07-19 21:47:20,502 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79017fda [2020-07-19 21:47:20,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:20,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:20,802 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 61 proven. 171 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-19 21:47:20,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549794471] [2020-07-19 21:47:20,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036058525] [2020-07-19 21:47:20,802 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79017fda 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 [2020-07-19 21:47:20,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:20,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-19 21:47:20,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:47:21,595 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 61 proven. 171 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-19 21:47:21,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:47:21,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 41 [2020-07-19 21:47:21,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157928472] [2020-07-19 21:47:21,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-07-19 21:47:21,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:47:21,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-07-19 21:47:21,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1350, Unknown=0, NotChecked=0, Total=1640 [2020-07-19 21:47:21,598 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand 41 states. [2020-07-19 21:47:22,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:47:22,622 INFO L93 Difference]: Finished difference Result 66 states and 82 transitions. [2020-07-19 21:47:22,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-19 21:47:22,623 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 44 [2020-07-19 21:47:22,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:47:22,623 INFO L225 Difference]: With dead ends: 66 [2020-07-19 21:47:22,624 INFO L226 Difference]: Without dead ends: 46 [2020-07-19 21:47:22,626 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=875, Invalid=2547, Unknown=0, NotChecked=0, Total=3422 [2020-07-19 21:47:22,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-19 21:47:22,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-07-19 21:47:22,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-19 21:47:22,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2020-07-19 21:47:22,631 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 44 [2020-07-19 21:47:22,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:47:22,632 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2020-07-19 21:47:22,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-07-19 21:47:22,632 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2020-07-19 21:47:22,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-19 21:47:22,632 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:47:22,633 INFO L422 BasicCegarLoop]: trace histogram [19, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:47:22,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-07-19 21:47:22,847 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:47:22,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:47:22,848 INFO L82 PathProgramCache]: Analyzing trace with hash 811322124, now seen corresponding path program 19 times [2020-07-19 21:47:22,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:47:22,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610551208] [2020-07-19 21:47:22,849 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79017fda [2020-07-19 21:47:22,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:23,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:23,177 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 64 proven. 190 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-19 21:47:23,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610551208] [2020-07-19 21:47:23,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317631849] [2020-07-19 21:47:23,178 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79017fda 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 [2020-07-19 21:47:23,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:23,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-19 21:47:23,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:47:24,054 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 64 proven. 190 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-19 21:47:24,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:47:24,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 43 [2020-07-19 21:47:24,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536922643] [2020-07-19 21:47:24,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-07-19 21:47:24,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:47:24,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-07-19 21:47:24,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=1491, Unknown=0, NotChecked=0, Total=1806 [2020-07-19 21:47:24,056 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand 43 states. [2020-07-19 21:47:25,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:47:25,093 INFO L93 Difference]: Finished difference Result 67 states and 83 transitions. [2020-07-19 21:47:25,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-19 21:47:25,096 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 45 [2020-07-19 21:47:25,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:47:25,096 INFO L225 Difference]: With dead ends: 67 [2020-07-19 21:47:25,096 INFO L226 Difference]: Without dead ends: 47 [2020-07-19 21:47:25,098 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=961, Invalid=2821, Unknown=0, NotChecked=0, Total=3782 [2020-07-19 21:47:25,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-19 21:47:25,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-07-19 21:47:25,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-19 21:47:25,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-07-19 21:47:25,103 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 45 [2020-07-19 21:47:25,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:47:25,103 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-07-19 21:47:25,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-07-19 21:47:25,103 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-07-19 21:47:25,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-07-19 21:47:25,104 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:47:25,104 INFO L422 BasicCegarLoop]: trace histogram [20, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:47:25,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:47:25,313 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:47:25,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:47:25,314 INFO L82 PathProgramCache]: Analyzing trace with hash 2007966052, now seen corresponding path program 20 times [2020-07-19 21:47:25,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:47:25,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875265753] [2020-07-19 21:47:25,315 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79017fda [2020-07-19 21:47:25,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:25,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:25,657 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 67 proven. 210 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-19 21:47:25,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875265753] [2020-07-19 21:47:25,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087112250] [2020-07-19 21:47:25,657 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79017fda 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 [2020-07-19 21:47:25,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:25,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-19 21:47:25,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:47:26,622 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 67 proven. 210 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-19 21:47:26,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:47:26,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 45 [2020-07-19 21:47:26,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430979586] [2020-07-19 21:47:26,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-07-19 21:47:26,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:47:26,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-07-19 21:47:26,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=1639, Unknown=0, NotChecked=0, Total=1980 [2020-07-19 21:47:26,624 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 45 states. [2020-07-19 21:47:27,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:47:27,815 INFO L93 Difference]: Finished difference Result 68 states and 84 transitions. [2020-07-19 21:47:27,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-19 21:47:27,816 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 46 [2020-07-19 21:47:27,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:47:27,817 INFO L225 Difference]: With dead ends: 68 [2020-07-19 21:47:27,817 INFO L226 Difference]: Without dead ends: 48 [2020-07-19 21:47:27,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1051, Invalid=3109, Unknown=0, NotChecked=0, Total=4160 [2020-07-19 21:47:27,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-19 21:47:27,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-07-19 21:47:27,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-19 21:47:27,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2020-07-19 21:47:27,836 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 46 [2020-07-19 21:47:27,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:47:27,836 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2020-07-19 21:47:27,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-07-19 21:47:27,837 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2020-07-19 21:47:27,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-07-19 21:47:27,840 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:47:27,842 INFO L422 BasicCegarLoop]: trace histogram [21, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:47:28,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-07-19 21:47:28,043 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:47:28,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:47:28,044 INFO L82 PathProgramCache]: Analyzing trace with hash 449222156, now seen corresponding path program 21 times [2020-07-19 21:47:28,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:47:28,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381256425] [2020-07-19 21:47:28,045 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79017fda [2020-07-19 21:47:28,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:28,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:28,435 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 70 proven. 231 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-19 21:47:28,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381256425] [2020-07-19 21:47:28,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575064388] [2020-07-19 21:47:28,435 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79017fda 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 [2020-07-19 21:47:28,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:28,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-19 21:47:28,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:47:29,479 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 70 proven. 231 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-19 21:47:29,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:47:29,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 47 [2020-07-19 21:47:29,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913156041] [2020-07-19 21:47:29,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-07-19 21:47:29,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:47:29,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-07-19 21:47:29,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=368, Invalid=1794, Unknown=0, NotChecked=0, Total=2162 [2020-07-19 21:47:29,481 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand 47 states. [2020-07-19 21:47:30,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:47:30,759 INFO L93 Difference]: Finished difference Result 69 states and 85 transitions. [2020-07-19 21:47:30,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-19 21:47:30,760 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 47 [2020-07-19 21:47:30,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:47:30,760 INFO L225 Difference]: With dead ends: 69 [2020-07-19 21:47:30,761 INFO L226 Difference]: Without dead ends: 49 [2020-07-19 21:47:30,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1145, Invalid=3411, Unknown=0, NotChecked=0, Total=4556 [2020-07-19 21:47:30,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-19 21:47:30,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-07-19 21:47:30,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-07-19 21:47:30,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2020-07-19 21:47:30,768 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 47 [2020-07-19 21:47:30,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:47:30,768 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2020-07-19 21:47:30,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-07-19 21:47:30,768 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2020-07-19 21:47:30,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-19 21:47:30,768 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:47:30,769 INFO L422 BasicCegarLoop]: trace histogram [22, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:47:30,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-07-19 21:47:30,970 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:47:30,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:47:30,970 INFO L82 PathProgramCache]: Analyzing trace with hash -627198364, now seen corresponding path program 22 times [2020-07-19 21:47:30,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:47:30,971 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490450017] [2020-07-19 21:47:30,972 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79017fda [2020-07-19 21:47:30,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:31,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:47:31,012 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2020-07-19 21:47:31,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490450017] [2020-07-19 21:47:31,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:47:31,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 21:47:31,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203468685] [2020-07-19 21:47:31,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 21:47:31,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:47:31,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 21:47:31,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-19 21:47:31,014 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 5 states. [2020-07-19 21:47:31,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:47:31,031 INFO L93 Difference]: Finished difference Result 66 states and 82 transitions. [2020-07-19 21:47:31,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 21:47:31,032 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 48 [2020-07-19 21:47:31,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:47:31,032 INFO L225 Difference]: With dead ends: 66 [2020-07-19 21:47:31,032 INFO L226 Difference]: Without dead ends: 0 [2020-07-19 21:47:31,033 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-19 21:47:31,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-19 21:47:31,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-19 21:47:31,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-19 21:47:31,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-19 21:47:31,034 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 48 [2020-07-19 21:47:31,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:47:31,034 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-19 21:47:31,034 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 21:47:31,034 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-19 21:47:31,034 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-19 21:47:31,034 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-07-19 21:47:31,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-19 21:47:31,172 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-19 21:47:31,172 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-19 21:47:31,172 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-19 21:47:31,172 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-19 21:47:31,172 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-19 21:47:31,172 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-19 21:47:31,173 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-19 21:47:31,173 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-19 21:47:31,173 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-07-19 21:47:31,173 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-19 21:47:31,173 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 30) no Hoare annotation was computed. [2020-07-19 21:47:31,173 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 30) no Hoare annotation was computed. [2020-07-19 21:47:31,173 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 30) the Hoare annotation is: true [2020-07-19 21:47:31,173 INFO L268 CegarLoopResult]: For program point L28(line 28) no Hoare annotation was computed. [2020-07-19 21:47:31,174 INFO L264 CegarLoopResult]: At program point L24-2(lines 24 26) the Hoare annotation is: (= 4 main_~k~0) [2020-07-19 21:47:31,174 INFO L264 CegarLoopResult]: At program point L24-3(lines 18 27) the Hoare annotation is: (or (and (<= main_~i~0 0) (<= (+ main_~j~0 100) (* 20 main_~i~0))) (= 4 main_~k~0)) [2020-07-19 21:47:31,174 INFO L264 CegarLoopResult]: At program point L20-2(lines 20 22) the Hoare annotation is: (or (= 4 main_~k~0) (<= main_~i~0 1)) [2020-07-19 21:47:31,174 INFO L268 CegarLoopResult]: For program point L20-3(lines 20 22) no Hoare annotation was computed. [2020-07-19 21:47:31,174 INFO L264 CegarLoopResult]: At program point L18-2(lines 18 27) the Hoare annotation is: (= 4 main_~k~0) [2020-07-19 21:47:31,174 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-07-19 21:47:31,174 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-07-19 21:47:31,175 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-07-19 21:47:31,175 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-07-19 21:47:31,175 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-07-19 21:47:31,175 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-07-19 21:47:31,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 09:47:31 BoogieIcfgContainer [2020-07-19 21:47:31,199 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-19 21:47:31,206 INFO L168 Benchmark]: Toolchain (without parser) took 30274.68 ms. Allocated memory was 146.8 MB in the beginning and 360.7 MB in the end (delta: 213.9 MB). Free memory was 103.3 MB in the beginning and 159.3 MB in the end (delta: -56.0 MB). Peak memory consumption was 157.9 MB. Max. memory is 7.1 GB. [2020-07-19 21:47:31,207 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 146.8 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-19 21:47:31,208 INFO L168 Benchmark]: CACSL2BoogieTranslator took 213.76 ms. Allocated memory is still 146.8 MB. Free memory was 102.9 MB in the beginning and 93.5 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-07-19 21:47:31,208 INFO L168 Benchmark]: Boogie Preprocessor took 112.03 ms. Allocated memory was 146.8 MB in the beginning and 204.5 MB in the end (delta: 57.7 MB). Free memory was 93.5 MB in the beginning and 183.3 MB in the end (delta: -89.8 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2020-07-19 21:47:31,209 INFO L168 Benchmark]: RCFGBuilder took 274.99 ms. Allocated memory is still 204.5 MB. Free memory was 183.3 MB in the beginning and 171.5 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. [2020-07-19 21:47:31,210 INFO L168 Benchmark]: TraceAbstraction took 29668.48 ms. Allocated memory was 204.5 MB in the beginning and 360.7 MB in the end (delta: 156.2 MB). Free memory was 170.8 MB in the beginning and 159.3 MB in the end (delta: 11.5 MB). Peak memory consumption was 167.8 MB. Max. memory is 7.1 GB. [2020-07-19 21:47:31,220 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 146.8 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 213.76 ms. Allocated memory is still 146.8 MB. Free memory was 102.9 MB in the beginning and 93.5 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 112.03 ms. Allocated memory was 146.8 MB in the beginning and 204.5 MB in the end (delta: 57.7 MB). Free memory was 93.5 MB in the beginning and 183.3 MB in the end (delta: -89.8 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 274.99 ms. Allocated memory is still 204.5 MB. Free memory was 183.3 MB in the beginning and 171.5 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 29668.48 ms. Allocated memory was 204.5 MB in the beginning and 360.7 MB in the end (delta: 156.2 MB). Free memory was 170.8 MB in the beginning and 159.3 MB in the end (delta: 11.5 MB). Peak memory consumption was 167.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 4 == k - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: 4 == k || i <= 1 - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: (i <= 0 && j + 100 <= 20 * i) || 4 == k - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 29.4s, OverallIterations: 25, TraceHistogramMax: 22, AutomataDifference: 11.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 362 SDtfs, 20 SDslu, 4415 SDs, 0 SdLazy, 1621 SolverSat, 514 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1304 GetRequests, 528 SyntacticMatches, 18 SemanticMatches, 758 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6094 ImplicationChecksByTransitivity, 20.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49occurred in iteration=24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 25 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 34 PreInvPairs, 70 NumberOfFragments, 33 HoareAnnotationTreeSize, 34 FomulaSimplifications, 1880 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 147 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 12.3s InterpolantComputationTime, 1524 NumberOfCodeBlocks, 1524 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 1478 ConstructedInterpolants, 0 QuantifiedInterpolants, 215825 SizeOfPredicates, 41 NumberOfNonLiveVariables, 1729 ConjunctsInSsa, 313 ConjunctsInUnsatCore, 46 InterpolantComputations, 4 PerfectInterpolantSequences, 2518/6052 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...