/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_8.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 11:13:50,943 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 11:13:50,946 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 11:13:50,960 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 11:13:50,961 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 11:13:50,962 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 11:13:50,964 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 11:13:50,966 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 11:13:50,968 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 11:13:50,969 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 11:13:50,971 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 11:13:50,972 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 11:13:50,973 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 11:13:50,974 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 11:13:50,975 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 11:13:50,977 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 11:13:50,978 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 11:13:50,979 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 11:13:50,981 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 11:13:50,984 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 11:13:50,986 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 11:13:50,987 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 11:13:50,989 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 11:13:50,990 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 11:13:50,993 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 11:13:51,016 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 11:13:51,017 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 11:13:51,018 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 11:13:51,019 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 [2020-07-21 11:13:51,056 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 11:13:51,056 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 11:13:51,060 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 11:13:51,060 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 11:13:51,060 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 11:13:51,061 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 11:13:51,061 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 11:13:51,061 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 11:13:51,061 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 11:13:51,061 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 11:13:51,063 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 11:13:51,063 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 11:13:51,063 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 11:13:51,064 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 11:13:51,064 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 11:13:51,065 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 11:13:51,065 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 11:13:51,065 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 11:13:51,065 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 11:13:51,065 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 11:13:51,066 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 11:13:51,066 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 11:13:51,067 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 11:13:51,067 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 11:13:51,067 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 11:13:51,067 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 11:13:51,068 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:51,068 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 11:13:51,068 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 11:13:51,068 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-21 11:13:51,386 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 11:13:51,408 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 11:13:51,411 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 11:13:51,413 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 11:13:51,413 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 11:13:51,414 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_8.c [2020-07-21 11:13:51,512 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23a5a53dc/4cc5cd40b7c945a5bae4541bf765cb54/FLAG9d62d7633 [2020-07-21 11:13:52,067 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 11:13:52,068 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_8.c [2020-07-21 11:13:52,081 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23a5a53dc/4cc5cd40b7c945a5bae4541bf765cb54/FLAG9d62d7633 [2020-07-21 11:13:52,385 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23a5a53dc/4cc5cd40b7c945a5bae4541bf765cb54 [2020-07-21 11:13:52,397 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 11:13:52,400 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 11:13:52,401 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 11:13:52,402 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 11:13:52,407 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 11:13:52,409 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:13:52" (1/1) ... [2020-07-21 11:13:52,412 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52590782 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:52, skipping insertion in model container [2020-07-21 11:13:52,413 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:13:52" (1/1) ... [2020-07-21 11:13:52,423 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 11:13:52,461 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 11:13:52,652 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:13:52,658 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 11:13:52,686 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:13:52,708 INFO L208 MainTranslator]: Completed translation [2020-07-21 11:13:52,709 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:52 WrapperNode [2020-07-21 11:13:52,710 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 11:13:52,711 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 11:13:52,711 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 11:13:52,711 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 11:13:52,728 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:52" (1/1) ... [2020-07-21 11:13:52,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:52" (1/1) ... [2020-07-21 11:13:52,820 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:52" (1/1) ... [2020-07-21 11:13:52,820 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:52" (1/1) ... [2020-07-21 11:13:52,836 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:52" (1/1) ... [2020-07-21 11:13:52,849 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:52" (1/1) ... [2020-07-21 11:13:52,854 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:52" (1/1) ... [2020-07-21 11:13:52,859 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 11:13:52,859 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 11:13:52,860 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 11:13:52,860 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 11:13:52,861 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:52" (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 [2020-07-21 11:13:52,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 11:13:52,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 11:13:52,935 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 11:13:52,935 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 11:13:52,935 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 11:13:52,935 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 11:13:52,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 11:13:52,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 11:13:53,265 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 11:13:53,266 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 11:13:53,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:13:53 BoogieIcfgContainer [2020-07-21 11:13:53,272 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 11:13:53,274 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 11:13:53,275 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 11:13:53,280 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 11:13:53,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:13:52" (1/3) ... [2020-07-21 11:13:53,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40f31f3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:13:53, skipping insertion in model container [2020-07-21 11:13:53,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:52" (2/3) ... [2020-07-21 11:13:53,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40f31f3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:13:53, skipping insertion in model container [2020-07-21 11:13:53,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:13:53" (3/3) ... [2020-07-21 11:13:53,290 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_8.c [2020-07-21 11:13:53,310 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 11:13:53,325 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 11:13:53,345 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 11:13:53,397 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 11:13:53,397 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 11:13:53,398 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 11:13:53,398 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 11:13:53,398 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 11:13:53,399 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 11:13:53,399 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 11:13:53,399 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 11:13:53,428 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-07-21 11:13:53,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-21 11:13:53,445 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:53,447 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:53,448 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:53,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:53,456 INFO L82 PathProgramCache]: Analyzing trace with hash 577441593, now seen corresponding path program 1 times [2020-07-21 11:13:53,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:53,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [504791609] [2020-07-21 11:13:53,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:53,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:53,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:53,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:53,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:13:53,634 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:53,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [504791609] [2020-07-21 11:13:53,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:53,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:53,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507011709] [2020-07-21 11:13:53,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:53,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:53,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:53,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:53,660 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2020-07-21 11:13:53,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:53,728 INFO L93 Difference]: Finished difference Result 75 states and 126 transitions. [2020-07-21 11:13:53,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:53,730 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-07-21 11:13:53,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:53,742 INFO L225 Difference]: With dead ends: 75 [2020-07-21 11:13:53,743 INFO L226 Difference]: Without dead ends: 60 [2020-07-21 11:13:53,746 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:53,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-21 11:13:53,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 42. [2020-07-21 11:13:53,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-21 11:13:53,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 73 transitions. [2020-07-21 11:13:53,797 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 73 transitions. Word has length 18 [2020-07-21 11:13:53,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:53,798 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 73 transitions. [2020-07-21 11:13:53,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:53,798 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 73 transitions. [2020-07-21 11:13:53,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-21 11:13:53,800 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:53,800 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:54,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:54,017 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:54,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:54,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1278506171, now seen corresponding path program 1 times [2020-07-21 11:13:54,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:54,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [353308946] [2020-07-21 11:13:54,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:54,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:54,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:54,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:54,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:13:54,101 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:54,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [353308946] [2020-07-21 11:13:54,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:54,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:54,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433791120] [2020-07-21 11:13:54,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:54,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:54,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:54,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:54,113 INFO L87 Difference]: Start difference. First operand 42 states and 73 transitions. Second operand 3 states. [2020-07-21 11:13:54,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:54,159 INFO L93 Difference]: Finished difference Result 97 states and 172 transitions. [2020-07-21 11:13:54,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:54,160 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-07-21 11:13:54,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:54,162 INFO L225 Difference]: With dead ends: 97 [2020-07-21 11:13:54,162 INFO L226 Difference]: Without dead ends: 60 [2020-07-21 11:13:54,164 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:54,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-21 11:13:54,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2020-07-21 11:13:54,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-07-21 11:13:54,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 101 transitions. [2020-07-21 11:13:54,176 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 101 transitions. Word has length 18 [2020-07-21 11:13:54,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:54,177 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 101 transitions. [2020-07-21 11:13:54,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:54,177 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 101 transitions. [2020-07-21 11:13:54,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 11:13:54,178 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:54,178 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:54,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:54,392 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:54,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:54,394 INFO L82 PathProgramCache]: Analyzing trace with hash 721034227, now seen corresponding path program 1 times [2020-07-21 11:13:54,394 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:54,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [247738645] [2020-07-21 11:13:54,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:54,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:54,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:54,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:54,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:13:54,465 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:54,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [247738645] [2020-07-21 11:13:54,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:54,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:54,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234253651] [2020-07-21 11:13:54,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:54,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:54,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:54,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:54,468 INFO L87 Difference]: Start difference. First operand 58 states and 101 transitions. Second operand 3 states. [2020-07-21 11:13:54,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:54,491 INFO L93 Difference]: Finished difference Result 90 states and 153 transitions. [2020-07-21 11:13:54,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:54,491 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-21 11:13:54,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:54,493 INFO L225 Difference]: With dead ends: 90 [2020-07-21 11:13:54,493 INFO L226 Difference]: Without dead ends: 63 [2020-07-21 11:13:54,494 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:54,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-21 11:13:54,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2020-07-21 11:13:54,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-21 11:13:54,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 103 transitions. [2020-07-21 11:13:54,505 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 103 transitions. Word has length 19 [2020-07-21 11:13:54,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:54,505 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 103 transitions. [2020-07-21 11:13:54,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:54,505 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 103 transitions. [2020-07-21 11:13:54,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 11:13:54,507 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:54,507 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:54,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:54,721 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:54,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:54,722 INFO L82 PathProgramCache]: Analyzing trace with hash 979199665, now seen corresponding path program 1 times [2020-07-21 11:13:54,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:54,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [739195785] [2020-07-21 11:13:54,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:54,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:54,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:54,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:54,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:13:54,790 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:54,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [739195785] [2020-07-21 11:13:54,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:54,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:54,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597602915] [2020-07-21 11:13:54,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:54,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:54,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:54,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:54,794 INFO L87 Difference]: Start difference. First operand 61 states and 103 transitions. Second operand 3 states. [2020-07-21 11:13:54,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:54,829 INFO L93 Difference]: Finished difference Result 112 states and 192 transitions. [2020-07-21 11:13:54,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:54,830 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-21 11:13:54,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:54,832 INFO L225 Difference]: With dead ends: 112 [2020-07-21 11:13:54,832 INFO L226 Difference]: Without dead ends: 110 [2020-07-21 11:13:54,833 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:54,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-07-21 11:13:54,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 80. [2020-07-21 11:13:54,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-07-21 11:13:54,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 136 transitions. [2020-07-21 11:13:54,851 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 136 transitions. Word has length 19 [2020-07-21 11:13:54,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:54,851 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 136 transitions. [2020-07-21 11:13:54,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:54,851 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 136 transitions. [2020-07-21 11:13:54,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 11:13:54,855 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:54,855 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:55,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:55,071 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:55,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:55,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1680264243, now seen corresponding path program 1 times [2020-07-21 11:13:55,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:55,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [792471098] [2020-07-21 11:13:55,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:55,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:55,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:55,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:55,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:13:55,129 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:55,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [792471098] [2020-07-21 11:13:55,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:55,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:55,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697705513] [2020-07-21 11:13:55,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:55,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:55,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:55,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:55,133 INFO L87 Difference]: Start difference. First operand 80 states and 136 transitions. Second operand 3 states. [2020-07-21 11:13:55,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:55,182 INFO L93 Difference]: Finished difference Result 184 states and 318 transitions. [2020-07-21 11:13:55,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:55,184 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-21 11:13:55,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:55,186 INFO L225 Difference]: With dead ends: 184 [2020-07-21 11:13:55,186 INFO L226 Difference]: Without dead ends: 112 [2020-07-21 11:13:55,188 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:55,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-07-21 11:13:55,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2020-07-21 11:13:55,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-07-21 11:13:55,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 186 transitions. [2020-07-21 11:13:55,205 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 186 transitions. Word has length 19 [2020-07-21 11:13:55,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:55,206 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 186 transitions. [2020-07-21 11:13:55,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:55,206 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 186 transitions. [2020-07-21 11:13:55,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 11:13:55,207 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:55,208 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:55,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:55,422 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:55,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:55,423 INFO L82 PathProgramCache]: Analyzing trace with hash 290632912, now seen corresponding path program 1 times [2020-07-21 11:13:55,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:55,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1986328947] [2020-07-21 11:13:55,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:55,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:55,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:55,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:55,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:13:55,477 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:55,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1986328947] [2020-07-21 11:13:55,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:55,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:55,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752539434] [2020-07-21 11:13:55,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:55,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:55,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:55,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:55,480 INFO L87 Difference]: Start difference. First operand 110 states and 186 transitions. Second operand 3 states. [2020-07-21 11:13:55,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:55,506 INFO L93 Difference]: Finished difference Result 165 states and 277 transitions. [2020-07-21 11:13:55,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:55,507 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-07-21 11:13:55,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:55,509 INFO L225 Difference]: With dead ends: 165 [2020-07-21 11:13:55,509 INFO L226 Difference]: Without dead ends: 114 [2020-07-21 11:13:55,510 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:55,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-07-21 11:13:55,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2020-07-21 11:13:55,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-07-21 11:13:55,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 186 transitions. [2020-07-21 11:13:55,541 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 186 transitions. Word has length 20 [2020-07-21 11:13:55,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:55,541 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 186 transitions. [2020-07-21 11:13:55,541 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:55,541 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 186 transitions. [2020-07-21 11:13:55,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 11:13:55,544 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:55,544 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:55,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:55,746 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:55,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:55,747 INFO L82 PathProgramCache]: Analyzing trace with hash 548798350, now seen corresponding path program 1 times [2020-07-21 11:13:55,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:55,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [781937066] [2020-07-21 11:13:55,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:55,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:55,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:55,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:55,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:13:55,813 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:55,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [781937066] [2020-07-21 11:13:55,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:55,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:55,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149715532] [2020-07-21 11:13:55,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:55,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:55,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:55,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:55,817 INFO L87 Difference]: Start difference. First operand 112 states and 186 transitions. Second operand 3 states. [2020-07-21 11:13:55,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:55,855 INFO L93 Difference]: Finished difference Result 204 states and 344 transitions. [2020-07-21 11:13:55,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:55,856 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-07-21 11:13:55,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:55,859 INFO L225 Difference]: With dead ends: 204 [2020-07-21 11:13:55,860 INFO L226 Difference]: Without dead ends: 202 [2020-07-21 11:13:55,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:55,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-07-21 11:13:55,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 152. [2020-07-21 11:13:55,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-07-21 11:13:55,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 250 transitions. [2020-07-21 11:13:55,894 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 250 transitions. Word has length 20 [2020-07-21 11:13:55,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:55,895 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 250 transitions. [2020-07-21 11:13:55,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:55,895 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 250 transitions. [2020-07-21 11:13:55,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 11:13:55,900 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:55,900 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:56,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:56,114 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:56,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:56,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1249862928, now seen corresponding path program 1 times [2020-07-21 11:13:56,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:56,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [369558016] [2020-07-21 11:13:56,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:56,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:56,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:56,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:56,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:13:56,171 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:56,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [369558016] [2020-07-21 11:13:56,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:56,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:56,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011839213] [2020-07-21 11:13:56,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:56,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:56,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:56,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:56,174 INFO L87 Difference]: Start difference. First operand 152 states and 250 transitions. Second operand 3 states. [2020-07-21 11:13:56,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:56,217 INFO L93 Difference]: Finished difference Result 352 states and 584 transitions. [2020-07-21 11:13:56,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:56,218 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-07-21 11:13:56,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:56,223 INFO L225 Difference]: With dead ends: 352 [2020-07-21 11:13:56,224 INFO L226 Difference]: Without dead ends: 210 [2020-07-21 11:13:56,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:56,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-07-21 11:13:56,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 208. [2020-07-21 11:13:56,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-07-21 11:13:56,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 338 transitions. [2020-07-21 11:13:56,258 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 338 transitions. Word has length 20 [2020-07-21 11:13:56,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:56,258 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 338 transitions. [2020-07-21 11:13:56,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:56,259 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 338 transitions. [2020-07-21 11:13:56,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 11:13:56,268 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:56,268 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:56,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:56,470 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:56,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:56,470 INFO L82 PathProgramCache]: Analyzing trace with hash -166905624, now seen corresponding path program 1 times [2020-07-21 11:13:56,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:56,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1603129351] [2020-07-21 11:13:56,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:56,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:56,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:56,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:56,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:13:56,520 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:56,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1603129351] [2020-07-21 11:13:56,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:56,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:56,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990496406] [2020-07-21 11:13:56,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:56,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:56,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:56,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:56,523 INFO L87 Difference]: Start difference. First operand 208 states and 338 transitions. Second operand 3 states. [2020-07-21 11:13:56,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:56,547 INFO L93 Difference]: Finished difference Result 312 states and 504 transitions. [2020-07-21 11:13:56,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:56,547 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-21 11:13:56,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:56,549 INFO L225 Difference]: With dead ends: 312 [2020-07-21 11:13:56,549 INFO L226 Difference]: Without dead ends: 214 [2020-07-21 11:13:56,550 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:56,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-07-21 11:13:56,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 212. [2020-07-21 11:13:56,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-07-21 11:13:56,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 338 transitions. [2020-07-21 11:13:56,561 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 338 transitions. Word has length 21 [2020-07-21 11:13:56,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:56,562 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 338 transitions. [2020-07-21 11:13:56,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:56,562 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 338 transitions. [2020-07-21 11:13:56,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 11:13:56,563 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:56,563 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:56,778 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:56,779 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:56,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:56,780 INFO L82 PathProgramCache]: Analyzing trace with hash 91259814, now seen corresponding path program 1 times [2020-07-21 11:13:56,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:56,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1301755172] [2020-07-21 11:13:56,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:56,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:56,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:56,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:56,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:13:56,842 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:56,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1301755172] [2020-07-21 11:13:56,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:56,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:56,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633875776] [2020-07-21 11:13:56,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:56,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:56,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:56,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:56,847 INFO L87 Difference]: Start difference. First operand 212 states and 338 transitions. Second operand 3 states. [2020-07-21 11:13:56,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:56,878 INFO L93 Difference]: Finished difference Result 380 states and 616 transitions. [2020-07-21 11:13:56,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:56,882 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-21 11:13:56,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:56,885 INFO L225 Difference]: With dead ends: 380 [2020-07-21 11:13:56,885 INFO L226 Difference]: Without dead ends: 378 [2020-07-21 11:13:56,886 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:56,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2020-07-21 11:13:56,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 296. [2020-07-21 11:13:56,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-07-21 11:13:56,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 462 transitions. [2020-07-21 11:13:56,898 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 462 transitions. Word has length 21 [2020-07-21 11:13:56,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:56,899 INFO L479 AbstractCegarLoop]: Abstraction has 296 states and 462 transitions. [2020-07-21 11:13:56,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:56,899 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 462 transitions. [2020-07-21 11:13:56,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 11:13:56,900 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:56,900 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:57,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:57,116 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:57,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:57,116 INFO L82 PathProgramCache]: Analyzing trace with hash 792324392, now seen corresponding path program 1 times [2020-07-21 11:13:57,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:57,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1178835287] [2020-07-21 11:13:57,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:57,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:57,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:57,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:57,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:13:57,164 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:57,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1178835287] [2020-07-21 11:13:57,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:57,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:57,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715688054] [2020-07-21 11:13:57,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:57,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:57,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:57,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:57,166 INFO L87 Difference]: Start difference. First operand 296 states and 462 transitions. Second operand 3 states. [2020-07-21 11:13:57,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:57,198 INFO L93 Difference]: Finished difference Result 684 states and 1072 transitions. [2020-07-21 11:13:57,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:57,198 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-21 11:13:57,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:57,201 INFO L225 Difference]: With dead ends: 684 [2020-07-21 11:13:57,201 INFO L226 Difference]: Without dead ends: 402 [2020-07-21 11:13:57,203 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:57,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2020-07-21 11:13:57,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 400. [2020-07-21 11:13:57,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2020-07-21 11:13:57,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 614 transitions. [2020-07-21 11:13:57,219 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 614 transitions. Word has length 21 [2020-07-21 11:13:57,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:57,219 INFO L479 AbstractCegarLoop]: Abstraction has 400 states and 614 transitions. [2020-07-21 11:13:57,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:57,220 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 614 transitions. [2020-07-21 11:13:57,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 11:13:57,221 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:57,221 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:57,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:57,436 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:57,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:57,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1465698011, now seen corresponding path program 1 times [2020-07-21 11:13:57,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:57,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [4654063] [2020-07-21 11:13:57,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:57,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:57,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:57,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:57,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:13:57,486 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:57,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [4654063] [2020-07-21 11:13:57,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:57,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:57,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951303707] [2020-07-21 11:13:57,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:57,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:57,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:57,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:57,489 INFO L87 Difference]: Start difference. First operand 400 states and 614 transitions. Second operand 3 states. [2020-07-21 11:13:57,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:57,519 INFO L93 Difference]: Finished difference Result 600 states and 916 transitions. [2020-07-21 11:13:57,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:57,519 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-21 11:13:57,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:57,523 INFO L225 Difference]: With dead ends: 600 [2020-07-21 11:13:57,524 INFO L226 Difference]: Without dead ends: 410 [2020-07-21 11:13:57,525 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:57,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2020-07-21 11:13:57,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 408. [2020-07-21 11:13:57,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 408 states. [2020-07-21 11:13:57,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 614 transitions. [2020-07-21 11:13:57,544 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 614 transitions. Word has length 22 [2020-07-21 11:13:57,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:57,547 INFO L479 AbstractCegarLoop]: Abstraction has 408 states and 614 transitions. [2020-07-21 11:13:57,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:57,547 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 614 transitions. [2020-07-21 11:13:57,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 11:13:57,551 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:57,552 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:57,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:57,769 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:57,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:57,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1207532573, now seen corresponding path program 1 times [2020-07-21 11:13:57,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:57,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1421607447] [2020-07-21 11:13:57,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:57,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:57,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:57,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:57,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:13:57,816 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:57,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1421607447] [2020-07-21 11:13:57,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:57,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:57,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540084859] [2020-07-21 11:13:57,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:57,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:57,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:57,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:57,819 INFO L87 Difference]: Start difference. First operand 408 states and 614 transitions. Second operand 3 states. [2020-07-21 11:13:57,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:57,851 INFO L93 Difference]: Finished difference Result 716 states and 1096 transitions. [2020-07-21 11:13:57,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:57,854 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-21 11:13:57,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:57,860 INFO L225 Difference]: With dead ends: 716 [2020-07-21 11:13:57,860 INFO L226 Difference]: Without dead ends: 714 [2020-07-21 11:13:57,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:57,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2020-07-21 11:13:57,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 584. [2020-07-21 11:13:57,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2020-07-21 11:13:57,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 854 transitions. [2020-07-21 11:13:57,897 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 854 transitions. Word has length 22 [2020-07-21 11:13:57,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:57,898 INFO L479 AbstractCegarLoop]: Abstraction has 584 states and 854 transitions. [2020-07-21 11:13:57,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:57,898 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 854 transitions. [2020-07-21 11:13:57,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 11:13:57,901 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:57,902 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:58,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:58,116 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:58,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:58,117 INFO L82 PathProgramCache]: Analyzing trace with hash -506467995, now seen corresponding path program 1 times [2020-07-21 11:13:58,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:58,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [814248430] [2020-07-21 11:13:58,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:58,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:58,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:58,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:58,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:13:58,167 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:58,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [814248430] [2020-07-21 11:13:58,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:58,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:58,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672399320] [2020-07-21 11:13:58,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:58,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:58,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:58,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:58,170 INFO L87 Difference]: Start difference. First operand 584 states and 854 transitions. Second operand 3 states. [2020-07-21 11:13:58,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:58,202 INFO L93 Difference]: Finished difference Result 1340 states and 1960 transitions. [2020-07-21 11:13:58,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:58,203 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-21 11:13:58,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:58,209 INFO L225 Difference]: With dead ends: 1340 [2020-07-21 11:13:58,209 INFO L226 Difference]: Without dead ends: 778 [2020-07-21 11:13:58,212 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:58,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2020-07-21 11:13:58,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 776. [2020-07-21 11:13:58,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2020-07-21 11:13:58,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1110 transitions. [2020-07-21 11:13:58,241 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1110 transitions. Word has length 22 [2020-07-21 11:13:58,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:58,241 INFO L479 AbstractCegarLoop]: Abstraction has 776 states and 1110 transitions. [2020-07-21 11:13:58,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:58,241 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1110 transitions. [2020-07-21 11:13:58,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-21 11:13:58,243 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:58,243 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:58,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:58,457 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:58,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:58,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1221411293, now seen corresponding path program 1 times [2020-07-21 11:13:58,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:58,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1969023580] [2020-07-21 11:13:58,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:58,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:58,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:58,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:58,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:13:58,502 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:58,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1969023580] [2020-07-21 11:13:58,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:58,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:58,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869047265] [2020-07-21 11:13:58,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:58,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:58,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:58,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:58,504 INFO L87 Difference]: Start difference. First operand 776 states and 1110 transitions. Second operand 3 states. [2020-07-21 11:13:58,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:58,532 INFO L93 Difference]: Finished difference Result 1164 states and 1656 transitions. [2020-07-21 11:13:58,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:58,532 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-21 11:13:58,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:58,537 INFO L225 Difference]: With dead ends: 1164 [2020-07-21 11:13:58,537 INFO L226 Difference]: Without dead ends: 794 [2020-07-21 11:13:58,541 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:58,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2020-07-21 11:13:58,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 792. [2020-07-21 11:13:58,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 792 states. [2020-07-21 11:13:58,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1110 transitions. [2020-07-21 11:13:58,567 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1110 transitions. Word has length 23 [2020-07-21 11:13:58,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:58,568 INFO L479 AbstractCegarLoop]: Abstraction has 792 states and 1110 transitions. [2020-07-21 11:13:58,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:58,568 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1110 transitions. [2020-07-21 11:13:58,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-21 11:13:58,570 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:58,570 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:58,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:58,784 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:58,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:58,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1479576731, now seen corresponding path program 1 times [2020-07-21 11:13:58,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:58,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [183865777] [2020-07-21 11:13:58,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:58,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:58,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:58,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:58,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:13:58,867 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:58,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [183865777] [2020-07-21 11:13:58,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:58,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:58,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638679007] [2020-07-21 11:13:58,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:58,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:58,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:58,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:58,873 INFO L87 Difference]: Start difference. First operand 792 states and 1110 transitions. Second operand 3 states. [2020-07-21 11:13:58,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:58,917 INFO L93 Difference]: Finished difference Result 1356 states and 1928 transitions. [2020-07-21 11:13:58,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:58,918 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-21 11:13:58,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:58,925 INFO L225 Difference]: With dead ends: 1356 [2020-07-21 11:13:58,925 INFO L226 Difference]: Without dead ends: 1354 [2020-07-21 11:13:58,926 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:58,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2020-07-21 11:13:58,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1160. [2020-07-21 11:13:58,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1160 states. [2020-07-21 11:13:58,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 1574 transitions. [2020-07-21 11:13:58,983 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 1574 transitions. Word has length 23 [2020-07-21 11:13:58,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:58,984 INFO L479 AbstractCegarLoop]: Abstraction has 1160 states and 1574 transitions. [2020-07-21 11:13:58,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:58,984 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 1574 transitions. [2020-07-21 11:13:58,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-21 11:13:58,988 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:58,988 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:59,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:59,202 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:59,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:59,202 INFO L82 PathProgramCache]: Analyzing trace with hash -2114325987, now seen corresponding path program 1 times [2020-07-21 11:13:59,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:59,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [549259261] [2020-07-21 11:13:59,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:59,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:59,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:59,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:59,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:13:59,257 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:59,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [549259261] [2020-07-21 11:13:59,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:59,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:59,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190054584] [2020-07-21 11:13:59,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:59,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:59,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:59,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:59,262 INFO L87 Difference]: Start difference. First operand 1160 states and 1574 transitions. Second operand 3 states. [2020-07-21 11:13:59,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:59,306 INFO L93 Difference]: Finished difference Result 2636 states and 3560 transitions. [2020-07-21 11:13:59,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:59,307 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-21 11:13:59,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:59,315 INFO L225 Difference]: With dead ends: 2636 [2020-07-21 11:13:59,316 INFO L226 Difference]: Without dead ends: 1514 [2020-07-21 11:13:59,320 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:59,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1514 states. [2020-07-21 11:13:59,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1514 to 1512. [2020-07-21 11:13:59,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1512 states. [2020-07-21 11:13:59,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 1990 transitions. [2020-07-21 11:13:59,369 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 1990 transitions. Word has length 23 [2020-07-21 11:13:59,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:59,371 INFO L479 AbstractCegarLoop]: Abstraction has 1512 states and 1990 transitions. [2020-07-21 11:13:59,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:59,371 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 1990 transitions. [2020-07-21 11:13:59,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 11:13:59,374 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:59,374 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:59,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:59,587 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:59,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:59,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1377545862, now seen corresponding path program 1 times [2020-07-21 11:13:59,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:59,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [198462048] [2020-07-21 11:13:59,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:59,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:59,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:59,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:59,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:13:59,625 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:59,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [198462048] [2020-07-21 11:13:59,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:59,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:59,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207908261] [2020-07-21 11:13:59,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:59,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:59,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:59,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:59,632 INFO L87 Difference]: Start difference. First operand 1512 states and 1990 transitions. Second operand 3 states. [2020-07-21 11:13:59,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:59,713 INFO L93 Difference]: Finished difference Result 2268 states and 2968 transitions. [2020-07-21 11:13:59,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:59,715 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-21 11:13:59,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:59,725 INFO L225 Difference]: With dead ends: 2268 [2020-07-21 11:13:59,725 INFO L226 Difference]: Without dead ends: 1546 [2020-07-21 11:13:59,727 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:59,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2020-07-21 11:13:59,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1544. [2020-07-21 11:13:59,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1544 states. [2020-07-21 11:13:59,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 1990 transitions. [2020-07-21 11:13:59,788 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 1990 transitions. Word has length 24 [2020-07-21 11:13:59,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:59,788 INFO L479 AbstractCegarLoop]: Abstraction has 1544 states and 1990 transitions. [2020-07-21 11:13:59,788 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:59,789 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 1990 transitions. [2020-07-21 11:13:59,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 11:13:59,793 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:59,793 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:14:00,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:00,007 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:14:00,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:14:00,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1119380424, now seen corresponding path program 1 times [2020-07-21 11:14:00,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:14:00,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1300563476] [2020-07-21 11:14:00,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:00,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:14:00,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:14:00,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:14:00,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:14:00,064 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:14:00,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1300563476] [2020-07-21 11:14:00,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:14:00,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:14:00,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247135620] [2020-07-21 11:14:00,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:14:00,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:14:00,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:14:00,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:14:00,069 INFO L87 Difference]: Start difference. First operand 1544 states and 1990 transitions. Second operand 3 states. [2020-07-21 11:14:00,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:14:00,124 INFO L93 Difference]: Finished difference Result 2572 states and 3336 transitions. [2020-07-21 11:14:00,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:14:00,125 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-21 11:14:00,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:14:00,139 INFO L225 Difference]: With dead ends: 2572 [2020-07-21 11:14:00,139 INFO L226 Difference]: Without dead ends: 2570 [2020-07-21 11:14:00,145 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:14:00,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2570 states. [2020-07-21 11:14:00,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2570 to 2312. [2020-07-21 11:14:00,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2312 states. [2020-07-21 11:14:00,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2312 states to 2312 states and 2886 transitions. [2020-07-21 11:14:00,219 INFO L78 Accepts]: Start accepts. Automaton has 2312 states and 2886 transitions. Word has length 24 [2020-07-21 11:14:00,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:14:00,219 INFO L479 AbstractCegarLoop]: Abstraction has 2312 states and 2886 transitions. [2020-07-21 11:14:00,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:14:00,220 INFO L276 IsEmpty]: Start isEmpty. Operand 2312 states and 2886 transitions. [2020-07-21 11:14:00,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 11:14:00,224 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:14:00,224 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:14:00,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:00,440 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:14:00,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:14:00,441 INFO L82 PathProgramCache]: Analyzing trace with hash -418315846, now seen corresponding path program 1 times [2020-07-21 11:14:00,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:14:00,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1531274207] [2020-07-21 11:14:00,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:00,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:14:00,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:14:00,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:14:00,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:14:00,503 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:14:00,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1531274207] [2020-07-21 11:14:00,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:14:00,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:14:00,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099411791] [2020-07-21 11:14:00,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:14:00,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:14:00,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:14:00,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:14:00,506 INFO L87 Difference]: Start difference. First operand 2312 states and 2886 transitions. Second operand 3 states. [2020-07-21 11:14:00,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:14:00,579 INFO L93 Difference]: Finished difference Result 5196 states and 6408 transitions. [2020-07-21 11:14:00,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:14:00,580 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-21 11:14:00,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:14:00,592 INFO L225 Difference]: With dead ends: 5196 [2020-07-21 11:14:00,592 INFO L226 Difference]: Without dead ends: 2954 [2020-07-21 11:14:00,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:14:00,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2020-07-21 11:14:00,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2952. [2020-07-21 11:14:00,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2952 states. [2020-07-21 11:14:00,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2952 states to 2952 states and 3526 transitions. [2020-07-21 11:14:00,718 INFO L78 Accepts]: Start accepts. Automaton has 2952 states and 3526 transitions. Word has length 24 [2020-07-21 11:14:00,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:14:00,718 INFO L479 AbstractCegarLoop]: Abstraction has 2952 states and 3526 transitions. [2020-07-21 11:14:00,718 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:14:00,718 INFO L276 IsEmpty]: Start isEmpty. Operand 2952 states and 3526 transitions. [2020-07-21 11:14:00,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-21 11:14:00,723 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:14:00,723 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:14:00,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:00,938 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:14:00,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:14:00,938 INFO L82 PathProgramCache]: Analyzing trace with hash -340838702, now seen corresponding path program 1 times [2020-07-21 11:14:00,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:14:00,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [901572749] [2020-07-21 11:14:00,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:00,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:14:00,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:14:00,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:14:00,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:14:00,983 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:14:00,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [901572749] [2020-07-21 11:14:00,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:14:00,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:14:00,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017040342] [2020-07-21 11:14:00,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:14:00,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:14:00,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:14:00,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:14:00,986 INFO L87 Difference]: Start difference. First operand 2952 states and 3526 transitions. Second operand 3 states. [2020-07-21 11:14:01,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:14:01,034 INFO L93 Difference]: Finished difference Result 4428 states and 5256 transitions. [2020-07-21 11:14:01,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:14:01,035 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-07-21 11:14:01,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:14:01,047 INFO L225 Difference]: With dead ends: 4428 [2020-07-21 11:14:01,048 INFO L226 Difference]: Without dead ends: 3018 [2020-07-21 11:14:01,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:14:01,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3018 states. [2020-07-21 11:14:01,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3018 to 3016. [2020-07-21 11:14:01,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3016 states. [2020-07-21 11:14:01,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3016 states to 3016 states and 3526 transitions. [2020-07-21 11:14:01,137 INFO L78 Accepts]: Start accepts. Automaton has 3016 states and 3526 transitions. Word has length 25 [2020-07-21 11:14:01,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:14:01,138 INFO L479 AbstractCegarLoop]: Abstraction has 3016 states and 3526 transitions. [2020-07-21 11:14:01,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:14:01,138 INFO L276 IsEmpty]: Start isEmpty. Operand 3016 states and 3526 transitions. [2020-07-21 11:14:01,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-21 11:14:01,143 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:14:01,143 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:14:01,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:01,357 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:14:01,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:14:01,357 INFO L82 PathProgramCache]: Analyzing trace with hash -82673264, now seen corresponding path program 1 times [2020-07-21 11:14:01,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:14:01,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1438741596] [2020-07-21 11:14:01,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) [2020-07-21 11:14:01,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:01,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:14:01,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:14:01,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:14:01,395 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:14:01,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1438741596] [2020-07-21 11:14:01,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:14:01,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:14:01,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877905222] [2020-07-21 11:14:01,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:14:01,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:14:01,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:14:01,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:14:01,398 INFO L87 Difference]: Start difference. First operand 3016 states and 3526 transitions. Second operand 3 states. [2020-07-21 11:14:01,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:14:01,495 INFO L93 Difference]: Finished difference Result 8650 states and 9799 transitions. [2020-07-21 11:14:01,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:14:01,496 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-07-21 11:14:01,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:14:01,508 INFO L225 Difference]: With dead ends: 8650 [2020-07-21 11:14:01,509 INFO L226 Difference]: Without dead ends: 3016 [2020-07-21 11:14:01,521 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:14:01,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3016 states. [2020-07-21 11:14:01,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3016 to 3016. [2020-07-21 11:14:01,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3016 states. [2020-07-21 11:14:01,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3016 states to 3016 states and 3270 transitions. [2020-07-21 11:14:01,600 INFO L78 Accepts]: Start accepts. Automaton has 3016 states and 3270 transitions. Word has length 25 [2020-07-21 11:14:01,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:14:01,601 INFO L479 AbstractCegarLoop]: Abstraction has 3016 states and 3270 transitions. [2020-07-21 11:14:01,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:14:01,601 INFO L276 IsEmpty]: Start isEmpty. Operand 3016 states and 3270 transitions. [2020-07-21 11:14:01,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-21 11:14:01,606 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:14:01,606 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:14:01,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:01,820 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:14:01,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:14:01,821 INFO L82 PathProgramCache]: Analyzing trace with hash -783737842, now seen corresponding path program 1 times [2020-07-21 11:14:01,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:14:01,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [10400254] [2020-07-21 11:14:01,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:01,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:14:01,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:14:01,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:14:01,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:14:01,867 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:14:01,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [10400254] [2020-07-21 11:14:01,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:14:01,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:14:01,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581598766] [2020-07-21 11:14:01,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:14:01,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:14:01,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:14:01,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:14:01,870 INFO L87 Difference]: Start difference. First operand 3016 states and 3270 transitions. Second operand 3 states. [2020-07-21 11:14:01,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:14:01,930 INFO L93 Difference]: Finished difference Result 3016 states and 3270 transitions. [2020-07-21 11:14:01,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:14:01,930 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-07-21 11:14:01,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:14:01,931 INFO L225 Difference]: With dead ends: 3016 [2020-07-21 11:14:01,931 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 11:14:01,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:14:01,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 11:14:01,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 11:14:01,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 11:14:01,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 11:14:01,936 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2020-07-21 11:14:01,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:14:01,936 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 11:14:01,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:14:01,937 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 11:14:01,937 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 11:14:02,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:02,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 11:14:02,213 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 11:14:02,213 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 11:14:02,213 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 11:14:02,213 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 11:14:02,213 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 11:14:02,213 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 11:14:02,213 INFO L268 CegarLoopResult]: For program point L126(line 126) no Hoare annotation was computed. [2020-07-21 11:14:02,214 INFO L264 CegarLoopResult]: At program point L126-1(lines 5 135) the Hoare annotation is: false [2020-07-21 11:14:02,214 INFO L268 CegarLoopResult]: For program point L60-1(lines 33 130) no Hoare annotation was computed. [2020-07-21 11:14:02,214 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 135) no Hoare annotation was computed. [2020-07-21 11:14:02,214 INFO L268 CegarLoopResult]: For program point L110-1(lines 33 130) no Hoare annotation was computed. [2020-07-21 11:14:02,214 INFO L268 CegarLoopResult]: For program point L111(line 111) no Hoare annotation was computed. [2020-07-21 11:14:02,214 INFO L268 CegarLoopResult]: For program point L95-1(lines 33 130) no Hoare annotation was computed. [2020-07-21 11:14:02,214 INFO L268 CegarLoopResult]: For program point L120-1(lines 33 130) no Hoare annotation was computed. [2020-07-21 11:14:02,214 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 135) no Hoare annotation was computed. [2020-07-21 11:14:02,215 INFO L268 CegarLoopResult]: For program point L96(line 96) no Hoare annotation was computed. [2020-07-21 11:14:02,215 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 133) no Hoare annotation was computed. [2020-07-21 11:14:02,215 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 135) the Hoare annotation is: true [2020-07-21 11:14:02,215 INFO L268 CegarLoopResult]: For program point L121(line 121) no Hoare annotation was computed. [2020-07-21 11:14:02,215 INFO L268 CegarLoopResult]: For program point L80-1(lines 33 130) no Hoare annotation was computed. [2020-07-21 11:14:02,215 INFO L268 CegarLoopResult]: For program point L105-1(lines 33 130) no Hoare annotation was computed. [2020-07-21 11:14:02,216 INFO L268 CegarLoopResult]: For program point L72-1(lines 33 130) no Hoare annotation was computed. [2020-07-21 11:14:02,216 INFO L268 CegarLoopResult]: For program point L64-1(lines 33 130) no Hoare annotation was computed. [2020-07-21 11:14:02,216 INFO L268 CegarLoopResult]: For program point L56(lines 56 58) no Hoare annotation was computed. [2020-07-21 11:14:02,216 INFO L268 CegarLoopResult]: For program point L56-2(lines 33 130) no Hoare annotation was computed. [2020-07-21 11:14:02,216 INFO L268 CegarLoopResult]: For program point L106(line 106) no Hoare annotation was computed. [2020-07-21 11:14:02,216 INFO L271 CegarLoopResult]: At program point L131(lines 5 135) the Hoare annotation is: true [2020-07-21 11:14:02,216 INFO L268 CegarLoopResult]: For program point L90-1(lines 33 130) no Hoare annotation was computed. [2020-07-21 11:14:02,216 INFO L268 CegarLoopResult]: For program point L115-1(lines 33 130) no Hoare annotation was computed. [2020-07-21 11:14:02,217 INFO L268 CegarLoopResult]: For program point L91(line 91) no Hoare annotation was computed. [2020-07-21 11:14:02,217 INFO L268 CegarLoopResult]: For program point L116(line 116) no Hoare annotation was computed. [2020-07-21 11:14:02,217 INFO L268 CegarLoopResult]: For program point L100-1(lines 33 130) no Hoare annotation was computed. [2020-07-21 11:14:02,217 INFO L271 CegarLoopResult]: At program point L125-1(lines 33 130) the Hoare annotation is: true [2020-07-21 11:14:02,217 INFO L268 CegarLoopResult]: For program point L84-1(lines 33 130) no Hoare annotation was computed. [2020-07-21 11:14:02,217 INFO L268 CegarLoopResult]: For program point L76-1(lines 33 130) no Hoare annotation was computed. [2020-07-21 11:14:02,217 INFO L268 CegarLoopResult]: For program point L101(line 101) no Hoare annotation was computed. [2020-07-21 11:14:02,217 INFO L268 CegarLoopResult]: For program point L35(lines 35 37) no Hoare annotation was computed. [2020-07-21 11:14:02,218 INFO L268 CegarLoopResult]: For program point L68-1(lines 33 130) no Hoare annotation was computed. [2020-07-21 11:14:02,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 11:14:02 BoogieIcfgContainer [2020-07-21 11:14:02,231 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 11:14:02,235 INFO L168 Benchmark]: Toolchain (without parser) took 9835.26 ms. Allocated memory was 138.4 MB in the beginning and 284.7 MB in the end (delta: 146.3 MB). Free memory was 101.8 MB in the beginning and 243.4 MB in the end (delta: -141.6 MB). Peak memory consumption was 4.7 MB. Max. memory is 7.1 GB. [2020-07-21 11:14:02,235 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 138.4 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-21 11:14:02,236 INFO L168 Benchmark]: CACSL2BoogieTranslator took 308.97 ms. Allocated memory is still 138.4 MB. Free memory was 101.6 MB in the beginning and 91.1 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-07-21 11:14:02,236 INFO L168 Benchmark]: Boogie Preprocessor took 148.20 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 91.1 MB in the beginning and 180.6 MB in the end (delta: -89.5 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. [2020-07-21 11:14:02,237 INFO L168 Benchmark]: RCFGBuilder took 412.29 ms. Allocated memory is still 202.4 MB. Free memory was 180.6 MB in the beginning and 163.1 MB in the end (delta: 17.5 MB). Peak memory consumption was 17.5 MB. Max. memory is 7.1 GB. [2020-07-21 11:14:02,238 INFO L168 Benchmark]: TraceAbstraction took 8957.11 ms. Allocated memory was 202.4 MB in the beginning and 284.7 MB in the end (delta: 82.3 MB). Free memory was 162.4 MB in the beginning and 243.4 MB in the end (delta: -81.0 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-21 11:14:02,241 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 138.4 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 308.97 ms. Allocated memory is still 138.4 MB. Free memory was 101.6 MB in the beginning and 91.1 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 148.20 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 91.1 MB in the beginning and 180.6 MB in the end (delta: -89.5 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 412.29 ms. Allocated memory is still 202.4 MB. Free memory was 180.6 MB in the beginning and 163.1 MB in the end (delta: 17.5 MB). Peak memory consumption was 17.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8957.11 ms. Allocated memory was 202.4 MB in the beginning and 284.7 MB in the end (delta: 82.3 MB). Free memory was 162.4 MB in the beginning and 243.4 MB in the end (delta: -81.0 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 133]: 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: 33]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 8.7s, OverallIterations: 23, TraceHistogramMax: 1, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1573 SDtfs, 755 SDslu, 1056 SDs, 0 SdLazy, 121 SolverSat, 23 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 475 GetRequests, 452 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3016occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 23 MinimizatonAttempts, 790 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 266 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 498 NumberOfCodeBlocks, 498 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 475 ConstructedInterpolants, 0 QuantifiedInterpolants, 19027 SizeOfPredicates, 0 NumberOfNonLiveVariables, 2132 ConjunctsInSsa, 69 ConjunctsInUnsatCore, 23 InterpolantComputations, 23 PerfectInterpolantSequences, 0/0 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...