/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 10:56:09,953 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 10:56:09,956 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 10:56:09,974 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 10:56:09,974 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 10:56:09,976 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 10:56:09,978 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 10:56:09,991 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 10:56:09,992 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 10:56:09,994 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 10:56:09,996 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 10:56:09,999 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 10:56:09,999 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 10:56:10,003 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 10:56:10,004 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 10:56:10,006 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 10:56:10,008 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 10:56:10,010 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 10:56:10,012 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 10:56:10,017 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 10:56:10,021 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 10:56:10,024 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 10:56:10,025 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 10:56:10,026 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 10:56:10,028 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 10:56:10,042 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 10:56:10,043 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 10:56:10,044 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 10:56:10,045 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 [2020-07-07 10:56:10,063 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 10:56:10,063 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 10:56:10,065 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-07 10:56:10,065 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-07 10:56:10,066 INFO L138 SettingsManager]: * Use SBE=true [2020-07-07 10:56:10,066 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 10:56:10,066 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 10:56:10,066 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 10:56:10,067 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 10:56:10,067 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 10:56:10,068 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 10:56:10,068 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 10:56:10,068 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 10:56:10,069 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 10:56:10,069 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 10:56:10,069 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 10:56:10,069 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 10:56:10,070 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 10:56:10,070 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-07 10:56:10,070 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 10:56:10,070 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 10:56:10,070 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 10:56:10,071 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 10:56:10,072 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-07 10:56:10,072 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-07 10:56:10,072 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-07 10:56:10,072 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-07 10:56:10,072 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 10:56:10,073 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-07 10:56:10,073 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-07 10:56:10,379 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 10:56:10,395 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 10:56:10,398 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 10:56:10,399 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 10:56:10,400 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 10:56:10,400 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c [2020-07-07 10:56:10,472 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0f6cc9f1/1daefe8d83a74c519ce493cb4fb230dd/FLAG323fcecae [2020-07-07 10:56:10,967 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 10:56:10,968 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c [2020-07-07 10:56:10,976 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0f6cc9f1/1daefe8d83a74c519ce493cb4fb230dd/FLAG323fcecae [2020-07-07 10:56:11,340 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0f6cc9f1/1daefe8d83a74c519ce493cb4fb230dd [2020-07-07 10:56:11,351 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 10:56:11,353 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 10:56:11,354 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 10:56:11,354 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 10:56:11,358 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 10:56:11,359 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 10:56:11" (1/1) ... [2020-07-07 10:56:11,362 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fe1dbf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:11, skipping insertion in model container [2020-07-07 10:56:11,362 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 10:56:11" (1/1) ... [2020-07-07 10:56:11,370 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 10:56:11,400 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 10:56:11,602 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 10:56:11,606 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 10:56:11,650 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 10:56:11,753 INFO L208 MainTranslator]: Completed translation [2020-07-07 10:56:11,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:11 WrapperNode [2020-07-07 10:56:11,757 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 10:56:11,758 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 10:56:11,758 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 10:56:11,758 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 10:56:11,772 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:11" (1/1) ... [2020-07-07 10:56:11,774 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:11" (1/1) ... [2020-07-07 10:56:11,793 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:11" (1/1) ... [2020-07-07 10:56:11,793 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:11" (1/1) ... [2020-07-07 10:56:11,803 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:11" (1/1) ... [2020-07-07 10:56:11,810 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:11" (1/1) ... [2020-07-07 10:56:11,815 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:11" (1/1) ... [2020-07-07 10:56:11,819 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 10:56:11,819 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 10:56:11,819 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 10:56:11,819 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 10:56:11,820 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:11" (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 [2020-07-07 10:56:11,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 10:56:11,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 10:56:11,887 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-07 10:56:11,887 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-07-07 10:56:11,887 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-07-07 10:56:11,887 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-07-07 10:56:11,887 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 10:56:11,887 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 10:56:11,888 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-07 10:56:11,888 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-07 10:56:11,888 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-07 10:56:11,888 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-07-07 10:56:11,888 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-07-07 10:56:11,889 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-07-07 10:56:11,889 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 10:56:11,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 10:56:11,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 10:56:12,372 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 10:56:12,373 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-07 10:56:12,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 10:56:12 BoogieIcfgContainer [2020-07-07 10:56:12,378 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 10:56:12,379 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 10:56:12,379 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 10:56:12,382 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 10:56:12,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 10:56:11" (1/3) ... [2020-07-07 10:56:12,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62815f2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 10:56:12, skipping insertion in model container [2020-07-07 10:56:12,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 10:56:11" (2/3) ... [2020-07-07 10:56:12,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62815f2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 10:56:12, skipping insertion in model container [2020-07-07 10:56:12,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 10:56:12" (3/3) ... [2020-07-07 10:56:12,386 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_2a.c.cil.c [2020-07-07 10:56:12,396 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-07 10:56:12,403 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 10:56:12,415 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 10:56:12,439 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 10:56:12,439 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 10:56:12,440 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-07 10:56:12,440 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 10:56:12,440 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 10:56:12,440 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 10:56:12,440 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 10:56:12,440 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 10:56:12,459 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-07-07 10:56:12,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-07 10:56:12,468 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:12,469 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:12,470 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:12,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:12,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1570912407, now seen corresponding path program 1 times [2020-07-07 10:56:12,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:12,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865132361] [2020-07-07 10:56:12,485 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:12,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:12,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:12,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:12,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:12,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:12,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:12,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:12,794 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-07 10:56:12,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865132361] [2020-07-07 10:56:12,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330720106] [2020-07-07 10:56:12,796 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:12,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:12,914 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-07 10:56:12,926 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:12,993 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-07-07 10:56:12,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-07 10:56:12,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-07-07 10:56:13,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110014097] [2020-07-07 10:56:13,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 10:56:13,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:13,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 10:56:13,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 10:56:13,024 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 3 states. [2020-07-07 10:56:13,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:13,078 INFO L93 Difference]: Finished difference Result 118 states and 174 transitions. [2020-07-07 10:56:13,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 10:56:13,080 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2020-07-07 10:56:13,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:13,091 INFO L225 Difference]: With dead ends: 118 [2020-07-07 10:56:13,091 INFO L226 Difference]: Without dead ends: 52 [2020-07-07 10:56:13,096 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 10:56:13,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-07 10:56:13,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-07-07 10:56:13,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-07 10:56:13,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 70 transitions. [2020-07-07 10:56:13,149 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 70 transitions. Word has length 48 [2020-07-07 10:56:13,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:13,152 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 70 transitions. [2020-07-07 10:56:13,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 10:56:13,152 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 70 transitions. [2020-07-07 10:56:13,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-07 10:56:13,155 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:13,156 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:13,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-07-07 10:56:13,371 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:13,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:13,372 INFO L82 PathProgramCache]: Analyzing trace with hash -880454641, now seen corresponding path program 1 times [2020-07-07 10:56:13,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:13,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523564591] [2020-07-07 10:56:13,374 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:13,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:13,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:13,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:13,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:13,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:13,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:13,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:13,495 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-07 10:56:13,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523564591] [2020-07-07 10:56:13,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593472044] [2020-07-07 10:56:13,496 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:13,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:13,571 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-07 10:56:13,575 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:13,611 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-07-07 10:56:13,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-07 10:56:13,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2020-07-07 10:56:13,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889194276] [2020-07-07 10:56:13,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 10:56:13,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:13,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 10:56:13,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-07 10:56:13,615 INFO L87 Difference]: Start difference. First operand 52 states and 70 transitions. Second operand 4 states. [2020-07-07 10:56:13,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:13,655 INFO L93 Difference]: Finished difference Result 64 states and 84 transitions. [2020-07-07 10:56:13,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 10:56:13,655 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2020-07-07 10:56:13,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:13,658 INFO L225 Difference]: With dead ends: 64 [2020-07-07 10:56:13,658 INFO L226 Difference]: Without dead ends: 52 [2020-07-07 10:56:13,659 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-07 10:56:13,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-07 10:56:13,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-07-07 10:56:13,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-07 10:56:13,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 69 transitions. [2020-07-07 10:56:13,671 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 69 transitions. Word has length 50 [2020-07-07 10:56:13,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:13,672 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 69 transitions. [2020-07-07 10:56:13,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 10:56:13,672 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 69 transitions. [2020-07-07 10:56:13,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-07 10:56:13,674 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:13,674 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:13,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:13,890 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:13,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:13,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1901522995, now seen corresponding path program 1 times [2020-07-07 10:56:13,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:13,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408616879] [2020-07-07 10:56:13,891 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:13,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:13,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:13,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:13,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:13,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:13,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:13,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:13,983 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-07 10:56:13,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408616879] [2020-07-07 10:56:13,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620337587] [2020-07-07 10:56:13,984 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:14,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:14,040 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-07 10:56:14,043 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:14,141 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-07 10:56:14,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-07 10:56:14,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4] total 10 [2020-07-07 10:56:14,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749922609] [2020-07-07 10:56:14,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-07 10:56:14,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:14,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-07 10:56:14,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-07-07 10:56:14,144 INFO L87 Difference]: Start difference. First operand 52 states and 69 transitions. Second operand 8 states. [2020-07-07 10:56:14,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:14,281 INFO L93 Difference]: Finished difference Result 89 states and 121 transitions. [2020-07-07 10:56:14,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-07 10:56:14,282 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 50 [2020-07-07 10:56:14,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:14,286 INFO L225 Difference]: With dead ends: 89 [2020-07-07 10:56:14,286 INFO L226 Difference]: Without dead ends: 79 [2020-07-07 10:56:14,287 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-07-07 10:56:14,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-07-07 10:56:14,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-07-07 10:56:14,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-07 10:56:14,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 86 transitions. [2020-07-07 10:56:14,306 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 86 transitions. Word has length 50 [2020-07-07 10:56:14,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:14,311 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 86 transitions. [2020-07-07 10:56:14,311 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-07 10:56:14,312 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 86 transitions. [2020-07-07 10:56:14,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-07 10:56:14,315 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:14,315 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:14,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:14,534 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:14,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:14,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1643357557, now seen corresponding path program 1 times [2020-07-07 10:56:14,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:14,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744534348] [2020-07-07 10:56:14,536 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:14,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:14,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:14,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:14,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:14,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:14,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:14,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:14,612 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-07 10:56:14,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744534348] [2020-07-07 10:56:14,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25774406] [2020-07-07 10:56:14,613 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:14,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:14,665 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-07 10:56:14,679 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:14,752 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-07 10:56:14,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:14,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7] total 9 [2020-07-07 10:56:14,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770642808] [2020-07-07 10:56:14,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-07 10:56:14,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:14,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-07 10:56:14,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-07 10:56:14,756 INFO L87 Difference]: Start difference. First operand 64 states and 86 transitions. Second operand 9 states. [2020-07-07 10:56:15,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:15,117 INFO L93 Difference]: Finished difference Result 168 states and 236 transitions. [2020-07-07 10:56:15,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-07 10:56:15,117 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 50 [2020-07-07 10:56:15,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:15,120 INFO L225 Difference]: With dead ends: 168 [2020-07-07 10:56:15,121 INFO L226 Difference]: Without dead ends: 112 [2020-07-07 10:56:15,122 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2020-07-07 10:56:15,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-07-07 10:56:15,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 97. [2020-07-07 10:56:15,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-07-07 10:56:15,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 133 transitions. [2020-07-07 10:56:15,144 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 133 transitions. Word has length 50 [2020-07-07 10:56:15,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:15,145 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 133 transitions. [2020-07-07 10:56:15,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-07 10:56:15,145 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 133 transitions. [2020-07-07 10:56:15,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-07 10:56:15,148 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:15,148 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:15,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:15,363 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:15,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:15,363 INFO L82 PathProgramCache]: Analyzing trace with hash -88495188, now seen corresponding path program 1 times [2020-07-07 10:56:15,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:15,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003686370] [2020-07-07 10:56:15,364 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:15,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:15,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:15,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:15,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:15,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:15,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:15,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:15,445 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-07 10:56:15,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003686370] [2020-07-07 10:56:15,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545904188] [2020-07-07 10:56:15,446 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:15,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:15,498 INFO L264 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-07 10:56:15,506 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:15,548 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-07 10:56:15,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-07 10:56:15,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2020-07-07 10:56:15,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312861083] [2020-07-07 10:56:15,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 10:56:15,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:15,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 10:56:15,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-07 10:56:15,558 INFO L87 Difference]: Start difference. First operand 97 states and 133 transitions. Second operand 4 states. [2020-07-07 10:56:15,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:15,622 INFO L93 Difference]: Finished difference Result 189 states and 258 transitions. [2020-07-07 10:56:15,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 10:56:15,622 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2020-07-07 10:56:15,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:15,624 INFO L225 Difference]: With dead ends: 189 [2020-07-07 10:56:15,624 INFO L226 Difference]: Without dead ends: 106 [2020-07-07 10:56:15,626 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-07-07 10:56:15,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-07-07 10:56:15,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 103. [2020-07-07 10:56:15,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-07-07 10:56:15,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 141 transitions. [2020-07-07 10:56:15,642 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 141 transitions. Word has length 55 [2020-07-07 10:56:15,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:15,642 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 141 transitions. [2020-07-07 10:56:15,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 10:56:15,643 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 141 transitions. [2020-07-07 10:56:15,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-07-07 10:56:15,645 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:15,646 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:15,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:15,860 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:15,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:15,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1588904245, now seen corresponding path program 1 times [2020-07-07 10:56:15,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:15,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465198253] [2020-07-07 10:56:15,862 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:15,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:15,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:15,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:15,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:16,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:16,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:16,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:16,021 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-07 10:56:16,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465198253] [2020-07-07 10:56:16,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527553964] [2020-07-07 10:56:16,022 INFO L94 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 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:16,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:16,079 INFO L264 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-07 10:56:16,088 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:16,128 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-07 10:56:16,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-07 10:56:16,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2020-07-07 10:56:16,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035367824] [2020-07-07 10:56:16,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 10:56:16,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:16,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 10:56:16,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-07-07 10:56:16,131 INFO L87 Difference]: Start difference. First operand 103 states and 141 transitions. Second operand 5 states. [2020-07-07 10:56:16,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:16,244 INFO L93 Difference]: Finished difference Result 215 states and 300 transitions. [2020-07-07 10:56:16,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 10:56:16,245 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 57 [2020-07-07 10:56:16,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:16,247 INFO L225 Difference]: With dead ends: 215 [2020-07-07 10:56:16,247 INFO L226 Difference]: Without dead ends: 126 [2020-07-07 10:56:16,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-07-07 10:56:16,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-07-07 10:56:16,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 109. [2020-07-07 10:56:16,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-07-07 10:56:16,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 150 transitions. [2020-07-07 10:56:16,285 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 150 transitions. Word has length 57 [2020-07-07 10:56:16,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:16,288 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 150 transitions. [2020-07-07 10:56:16,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 10:56:16,288 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 150 transitions. [2020-07-07 10:56:16,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-07 10:56:16,290 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:16,290 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:16,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:16,507 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:16,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:16,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1775343747, now seen corresponding path program 1 times [2020-07-07 10:56:16,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:16,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537553728] [2020-07-07 10:56:16,508 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:16,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:16,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:16,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:16,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:16,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:16,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:16,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:16,589 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-07 10:56:16,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537553728] [2020-07-07 10:56:16,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132012240] [2020-07-07 10:56:16,591 INFO L94 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 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:16,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:16,647 INFO L264 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-07 10:56:16,649 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:16,677 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-07 10:56:16,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:16,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-07 10:56:16,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257242310] [2020-07-07 10:56:16,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-07 10:56:16,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:16,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-07 10:56:16,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-07-07 10:56:16,680 INFO L87 Difference]: Start difference. First operand 109 states and 150 transitions. Second operand 8 states. [2020-07-07 10:56:16,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:16,793 INFO L93 Difference]: Finished difference Result 219 states and 308 transitions. [2020-07-07 10:56:16,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-07 10:56:16,794 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 58 [2020-07-07 10:56:16,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:16,796 INFO L225 Difference]: With dead ends: 219 [2020-07-07 10:56:16,796 INFO L226 Difference]: Without dead ends: 126 [2020-07-07 10:56:16,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2020-07-07 10:56:16,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-07-07 10:56:16,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 116. [2020-07-07 10:56:16,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-07-07 10:56:16,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 160 transitions. [2020-07-07 10:56:16,811 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 160 transitions. Word has length 58 [2020-07-07 10:56:16,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:16,811 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 160 transitions. [2020-07-07 10:56:16,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-07 10:56:16,811 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 160 transitions. [2020-07-07 10:56:16,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-07-07 10:56:16,813 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:16,813 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:17,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:17,027 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:17,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:17,028 INFO L82 PathProgramCache]: Analyzing trace with hash 847268444, now seen corresponding path program 1 times [2020-07-07 10:56:17,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:17,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390600723] [2020-07-07 10:56:17,029 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:17,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:17,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:17,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:17,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:17,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:17,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:17,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:17,187 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-07 10:56:17,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390600723] [2020-07-07 10:56:17,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269581311] [2020-07-07 10:56:17,188 INFO L94 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 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:17,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:17,236 INFO L264 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-07 10:56:17,244 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:17,284 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-07 10:56:17,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:17,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-07-07 10:56:17,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732919215] [2020-07-07 10:56:17,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-07 10:56:17,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:17,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-07 10:56:17,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-07-07 10:56:17,288 INFO L87 Difference]: Start difference. First operand 116 states and 160 transitions. Second operand 10 states. [2020-07-07 10:56:17,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:17,571 INFO L93 Difference]: Finished difference Result 238 states and 334 transitions. [2020-07-07 10:56:17,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-07 10:56:17,572 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2020-07-07 10:56:17,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:17,573 INFO L225 Difference]: With dead ends: 238 [2020-07-07 10:56:17,574 INFO L226 Difference]: Without dead ends: 139 [2020-07-07 10:56:17,575 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-07-07 10:56:17,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-07-07 10:56:17,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 118. [2020-07-07 10:56:17,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-07-07 10:56:17,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 163 transitions. [2020-07-07 10:56:17,605 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 163 transitions. Word has length 60 [2020-07-07 10:56:17,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:17,605 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 163 transitions. [2020-07-07 10:56:17,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-07 10:56:17,612 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 163 transitions. [2020-07-07 10:56:17,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-07 10:56:17,613 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:17,613 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:17,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-07-07 10:56:17,815 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:17,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:17,815 INFO L82 PathProgramCache]: Analyzing trace with hash 731565580, now seen corresponding path program 2 times [2020-07-07 10:56:17,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:17,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796062463] [2020-07-07 10:56:17,817 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:17,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:17,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:17,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:17,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:17,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:17,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:17,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:17,934 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-07 10:56:17,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796062463] [2020-07-07 10:56:17,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664440301] [2020-07-07 10:56:17,935 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:17,985 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-07-07 10:56:17,985 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:56:17,986 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-07 10:56:17,988 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:18,027 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-07-07 10:56:18,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-07 10:56:18,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2020-07-07 10:56:18,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363320183] [2020-07-07 10:56:18,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-07 10:56:18,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:18,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-07 10:56:18,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-07 10:56:18,029 INFO L87 Difference]: Start difference. First operand 118 states and 163 transitions. Second operand 6 states. [2020-07-07 10:56:18,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:18,075 INFO L93 Difference]: Finished difference Result 124 states and 168 transitions. [2020-07-07 10:56:18,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 10:56:18,076 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2020-07-07 10:56:18,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:18,078 INFO L225 Difference]: With dead ends: 124 [2020-07-07 10:56:18,078 INFO L226 Difference]: Without dead ends: 118 [2020-07-07 10:56:18,078 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-07 10:56:18,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-07-07 10:56:18,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2020-07-07 10:56:18,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-07-07 10:56:18,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 162 transitions. [2020-07-07 10:56:18,089 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 162 transitions. Word has length 61 [2020-07-07 10:56:18,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:18,090 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 162 transitions. [2020-07-07 10:56:18,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-07 10:56:18,090 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 162 transitions. [2020-07-07 10:56:18,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-07 10:56:18,092 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:18,092 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:18,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:18,306 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:18,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:18,307 INFO L82 PathProgramCache]: Analyzing trace with hash 674307278, now seen corresponding path program 1 times [2020-07-07 10:56:18,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:18,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910300698] [2020-07-07 10:56:18,308 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:18,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:18,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:18,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:18,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:18,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:18,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:18,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:18,408 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-07 10:56:18,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910300698] [2020-07-07 10:56:18,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478966581] [2020-07-07 10:56:18,409 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:18,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:18,476 INFO L264 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-07 10:56:18,477 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:18,521 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-07 10:56:18,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:18,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-07-07 10:56:18,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988995889] [2020-07-07 10:56:18,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-07 10:56:18,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:18,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-07 10:56:18,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-07-07 10:56:18,524 INFO L87 Difference]: Start difference. First operand 118 states and 162 transitions. Second operand 10 states. [2020-07-07 10:56:18,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:18,659 INFO L93 Difference]: Finished difference Result 238 states and 334 transitions. [2020-07-07 10:56:18,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-07 10:56:18,660 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 61 [2020-07-07 10:56:18,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:18,662 INFO L225 Difference]: With dead ends: 238 [2020-07-07 10:56:18,662 INFO L226 Difference]: Without dead ends: 139 [2020-07-07 10:56:18,665 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2020-07-07 10:56:18,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-07-07 10:56:18,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 122. [2020-07-07 10:56:18,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-07-07 10:56:18,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 167 transitions. [2020-07-07 10:56:18,683 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 167 transitions. Word has length 61 [2020-07-07 10:56:18,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:18,684 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 167 transitions. [2020-07-07 10:56:18,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-07 10:56:18,684 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 167 transitions. [2020-07-07 10:56:18,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-07-07 10:56:18,685 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:18,686 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:18,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:18,901 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:18,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:18,901 INFO L82 PathProgramCache]: Analyzing trace with hash 453220333, now seen corresponding path program 1 times [2020-07-07 10:56:18,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:18,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700780181] [2020-07-07 10:56:18,902 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:18,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:18,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:18,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:18,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:19,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:19,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:19,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:19,078 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-07 10:56:19,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700780181] [2020-07-07 10:56:19,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370342688] [2020-07-07 10:56:19,080 INFO L94 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 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:19,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:19,138 INFO L264 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-07 10:56:19,140 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:19,239 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 24 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-07 10:56:19,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:19,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-07-07 10:56:19,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373940371] [2020-07-07 10:56:19,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-07 10:56:19,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:19,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-07 10:56:19,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-07-07 10:56:19,242 INFO L87 Difference]: Start difference. First operand 122 states and 167 transitions. Second operand 12 states. [2020-07-07 10:56:19,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:19,640 INFO L93 Difference]: Finished difference Result 251 states and 351 transitions. [2020-07-07 10:56:19,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-07 10:56:19,641 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 63 [2020-07-07 10:56:19,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:19,642 INFO L225 Difference]: With dead ends: 251 [2020-07-07 10:56:19,642 INFO L226 Difference]: Without dead ends: 149 [2020-07-07 10:56:19,644 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-07-07 10:56:19,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-07-07 10:56:19,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 124. [2020-07-07 10:56:19,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-07-07 10:56:19,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 170 transitions. [2020-07-07 10:56:19,656 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 170 transitions. Word has length 63 [2020-07-07 10:56:19,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:19,656 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 170 transitions. [2020-07-07 10:56:19,656 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-07 10:56:19,656 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 170 transitions. [2020-07-07 10:56:19,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-07-07 10:56:19,658 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:19,658 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:19,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-07-07 10:56:19,868 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:19,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:19,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1176242209, now seen corresponding path program 2 times [2020-07-07 10:56:19,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:19,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094800754] [2020-07-07 10:56:19,868 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:19,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:19,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:19,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:19,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:19,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:19,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:19,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:19,950 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-07 10:56:19,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094800754] [2020-07-07 10:56:19,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403125625] [2020-07-07 10:56:19,951 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:19,998 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-07-07 10:56:19,998 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:56:20,000 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-07 10:56:20,002 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:20,050 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-07-07 10:56:20,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-07 10:56:20,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2020-07-07 10:56:20,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985589703] [2020-07-07 10:56:20,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-07 10:56:20,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:20,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-07 10:56:20,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-07-07 10:56:20,055 INFO L87 Difference]: Start difference. First operand 124 states and 170 transitions. Second operand 6 states. [2020-07-07 10:56:20,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:20,110 INFO L93 Difference]: Finished difference Result 141 states and 188 transitions. [2020-07-07 10:56:20,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 10:56:20,110 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 64 [2020-07-07 10:56:20,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:20,112 INFO L225 Difference]: With dead ends: 141 [2020-07-07 10:56:20,112 INFO L226 Difference]: Without dead ends: 126 [2020-07-07 10:56:20,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-07 10:56:20,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-07-07 10:56:20,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2020-07-07 10:56:20,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-07-07 10:56:20,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 166 transitions. [2020-07-07 10:56:20,125 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 166 transitions. Word has length 64 [2020-07-07 10:56:20,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:20,126 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 166 transitions. [2020-07-07 10:56:20,126 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-07 10:56:20,126 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 166 transitions. [2020-07-07 10:56:20,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-07-07 10:56:20,128 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:20,128 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:20,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:20,342 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:20,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:20,343 INFO L82 PathProgramCache]: Analyzing trace with hash 467538922, now seen corresponding path program 1 times [2020-07-07 10:56:20,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:20,343 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222110542] [2020-07-07 10:56:20,344 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:20,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:20,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:20,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:20,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:20,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:20,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:20,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:20,426 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-07 10:56:20,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222110542] [2020-07-07 10:56:20,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058179594] [2020-07-07 10:56:20,427 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:20,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:20,501 INFO L264 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-07 10:56:20,503 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:20,564 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-07 10:56:20,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:20,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-07-07 10:56:20,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756202001] [2020-07-07 10:56:20,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-07 10:56:20,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:20,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-07 10:56:20,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-07-07 10:56:20,568 INFO L87 Difference]: Start difference. First operand 125 states and 166 transitions. Second operand 12 states. [2020-07-07 10:56:20,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:20,762 INFO L93 Difference]: Finished difference Result 256 states and 347 transitions. [2020-07-07 10:56:20,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-07 10:56:20,763 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 66 [2020-07-07 10:56:20,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:20,766 INFO L225 Difference]: With dead ends: 256 [2020-07-07 10:56:20,766 INFO L226 Difference]: Without dead ends: 153 [2020-07-07 10:56:20,767 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=188, Unknown=0, NotChecked=0, Total=306 [2020-07-07 10:56:20,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-07-07 10:56:20,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 129. [2020-07-07 10:56:20,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-07-07 10:56:20,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 171 transitions. [2020-07-07 10:56:20,780 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 171 transitions. Word has length 66 [2020-07-07 10:56:20,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:20,781 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 171 transitions. [2020-07-07 10:56:20,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-07 10:56:20,782 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 171 transitions. [2020-07-07 10:56:20,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-07-07 10:56:20,785 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:20,785 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:20,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-07-07 10:56:20,987 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:20,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:20,987 INFO L82 PathProgramCache]: Analyzing trace with hash 726848265, now seen corresponding path program 1 times [2020-07-07 10:56:20,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:20,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298553120] [2020-07-07 10:56:20,988 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:21,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:21,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:21,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:21,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:21,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:21,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:21,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:21,163 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-07 10:56:21,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298553120] [2020-07-07 10:56:21,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259499066] [2020-07-07 10:56:21,167 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:21,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:21,230 INFO L264 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-07 10:56:21,232 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:21,306 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 25 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-07 10:56:21,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:21,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-07-07 10:56:21,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084969857] [2020-07-07 10:56:21,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-07 10:56:21,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:21,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-07 10:56:21,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-07-07 10:56:21,308 INFO L87 Difference]: Start difference. First operand 129 states and 171 transitions. Second operand 14 states. [2020-07-07 10:56:21,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:21,760 INFO L93 Difference]: Finished difference Result 266 states and 358 transitions. [2020-07-07 10:56:21,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-07 10:56:21,760 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 68 [2020-07-07 10:56:21,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:21,762 INFO L225 Difference]: With dead ends: 266 [2020-07-07 10:56:21,762 INFO L226 Difference]: Without dead ends: 160 [2020-07-07 10:56:21,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2020-07-07 10:56:21,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-07-07 10:56:21,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 131. [2020-07-07 10:56:21,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-07-07 10:56:21,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 174 transitions. [2020-07-07 10:56:21,776 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 174 transitions. Word has length 68 [2020-07-07 10:56:21,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:21,776 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 174 transitions. [2020-07-07 10:56:21,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-07 10:56:21,776 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 174 transitions. [2020-07-07 10:56:21,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-07 10:56:21,778 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:21,778 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:21,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:21,992 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:21,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:21,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1682015367, now seen corresponding path program 2 times [2020-07-07 10:56:21,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:21,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901943721] [2020-07-07 10:56:21,993 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:22,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:22,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:22,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:22,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:22,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:22,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:22,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:22,084 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-07 10:56:22,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901943721] [2020-07-07 10:56:22,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117516975] [2020-07-07 10:56:22,085 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:22,148 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 10:56:22,148 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:56:22,149 INFO L264 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-07 10:56:22,166 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:22,225 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-07 10:56:22,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:22,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-07-07 10:56:22,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390461404] [2020-07-07 10:56:22,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-07 10:56:22,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:22,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-07 10:56:22,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2020-07-07 10:56:22,228 INFO L87 Difference]: Start difference. First operand 131 states and 174 transitions. Second operand 14 states. [2020-07-07 10:56:22,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:22,392 INFO L93 Difference]: Finished difference Result 272 states and 370 transitions. [2020-07-07 10:56:22,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-07 10:56:22,393 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 69 [2020-07-07 10:56:22,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:22,394 INFO L225 Difference]: With dead ends: 272 [2020-07-07 10:56:22,394 INFO L226 Difference]: Without dead ends: 166 [2020-07-07 10:56:22,395 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2020-07-07 10:56:22,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-07-07 10:56:22,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 135. [2020-07-07 10:56:22,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-07-07 10:56:22,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 179 transitions. [2020-07-07 10:56:22,406 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 179 transitions. Word has length 69 [2020-07-07 10:56:22,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:22,406 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 179 transitions. [2020-07-07 10:56:22,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-07 10:56:22,406 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 179 transitions. [2020-07-07 10:56:22,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-07-07 10:56:22,408 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:22,408 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:22,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-07-07 10:56:22,623 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:22,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:22,623 INFO L82 PathProgramCache]: Analyzing trace with hash 884445912, now seen corresponding path program 2 times [2020-07-07 10:56:22,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:22,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973368337] [2020-07-07 10:56:22,624 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:22,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:22,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:22,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:22,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:22,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:22,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:22,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:22,782 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 39 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-07 10:56:22,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973368337] [2020-07-07 10:56:22,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933683509] [2020-07-07 10:56:22,783 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:22,841 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 10:56:22,841 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:56:22,843 INFO L264 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-07 10:56:22,844 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:22,936 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-07 10:56:22,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:22,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-07-07 10:56:22,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892405953] [2020-07-07 10:56:22,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-07 10:56:22,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:22,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-07 10:56:22,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2020-07-07 10:56:22,938 INFO L87 Difference]: Start difference. First operand 135 states and 179 transitions. Second operand 16 states. [2020-07-07 10:56:23,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:23,491 INFO L93 Difference]: Finished difference Result 279 states and 376 transitions. [2020-07-07 10:56:23,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-07 10:56:23,491 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 71 [2020-07-07 10:56:23,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:23,493 INFO L225 Difference]: With dead ends: 279 [2020-07-07 10:56:23,493 INFO L226 Difference]: Without dead ends: 170 [2020-07-07 10:56:23,494 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2020-07-07 10:56:23,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-07-07 10:56:23,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 137. [2020-07-07 10:56:23,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-07-07 10:56:23,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 182 transitions. [2020-07-07 10:56:23,504 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 182 transitions. Word has length 71 [2020-07-07 10:56:23,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:23,504 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 182 transitions. [2020-07-07 10:56:23,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-07 10:56:23,505 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 182 transitions. [2020-07-07 10:56:23,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-07-07 10:56:23,506 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:23,506 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:23,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-07-07 10:56:23,721 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:23,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:23,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1091455606, now seen corresponding path program 3 times [2020-07-07 10:56:23,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:23,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356116284] [2020-07-07 10:56:23,722 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:23,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:23,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:23,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:23,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:23,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:23,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:23,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:23,822 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 4 proven. 49 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-07 10:56:23,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356116284] [2020-07-07 10:56:23,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692468853] [2020-07-07 10:56:23,823 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:23,875 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-07-07 10:56:23,875 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:56:23,876 INFO L264 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-07 10:56:23,878 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:24,012 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-07-07 10:56:24,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:24,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2020-07-07 10:56:24,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775895522] [2020-07-07 10:56:24,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-07 10:56:24,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:24,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-07 10:56:24,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-07-07 10:56:24,014 INFO L87 Difference]: Start difference. First operand 137 states and 182 transitions. Second operand 17 states. [2020-07-07 10:56:24,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:24,581 INFO L93 Difference]: Finished difference Result 328 states and 497 transitions. [2020-07-07 10:56:24,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-07 10:56:24,582 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 72 [2020-07-07 10:56:24,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:24,585 INFO L225 Difference]: With dead ends: 328 [2020-07-07 10:56:24,585 INFO L226 Difference]: Without dead ends: 203 [2020-07-07 10:56:24,586 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=585, Unknown=0, NotChecked=0, Total=756 [2020-07-07 10:56:24,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-07-07 10:56:24,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 154. [2020-07-07 10:56:24,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-07-07 10:56:24,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 213 transitions. [2020-07-07 10:56:24,604 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 213 transitions. Word has length 72 [2020-07-07 10:56:24,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:24,604 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 213 transitions. [2020-07-07 10:56:24,604 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-07 10:56:24,604 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 213 transitions. [2020-07-07 10:56:24,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-07-07 10:56:24,606 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:24,606 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:24,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-07-07 10:56:24,821 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:24,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:24,821 INFO L82 PathProgramCache]: Analyzing trace with hash 43570841, now seen corresponding path program 1 times [2020-07-07 10:56:24,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:24,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318829152] [2020-07-07 10:56:24,822 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:24,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:24,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:24,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:24,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:25,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:25,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:25,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:25,053 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 4 proven. 54 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-07 10:56:25,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318829152] [2020-07-07 10:56:25,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501003962] [2020-07-07 10:56:25,054 INFO L94 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 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:25,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:25,132 INFO L264 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-07 10:56:25,134 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:25,269 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-07 10:56:25,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:25,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2020-07-07 10:56:25,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214527231] [2020-07-07 10:56:25,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-07 10:56:25,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:25,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-07 10:56:25,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-07-07 10:56:25,272 INFO L87 Difference]: Start difference. First operand 154 states and 213 transitions. Second operand 18 states. [2020-07-07 10:56:25,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:25,974 INFO L93 Difference]: Finished difference Result 310 states and 442 transitions. [2020-07-07 10:56:25,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-07 10:56:25,975 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 77 [2020-07-07 10:56:25,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:25,977 INFO L225 Difference]: With dead ends: 310 [2020-07-07 10:56:25,977 INFO L226 Difference]: Without dead ends: 190 [2020-07-07 10:56:25,979 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2020-07-07 10:56:25,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-07-07 10:56:25,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 156. [2020-07-07 10:56:25,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-07-07 10:56:25,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 216 transitions. [2020-07-07 10:56:25,992 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 216 transitions. Word has length 77 [2020-07-07 10:56:25,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:25,993 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 216 transitions. [2020-07-07 10:56:25,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-07 10:56:25,993 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 216 transitions. [2020-07-07 10:56:25,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-07-07 10:56:25,995 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:25,995 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:26,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-07-07 10:56:26,210 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:26,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:26,211 INFO L82 PathProgramCache]: Analyzing trace with hash 147496809, now seen corresponding path program 1 times [2020-07-07 10:56:26,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:26,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215144291] [2020-07-07 10:56:26,212 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:26,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:26,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:26,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:26,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:26,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:26,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:26,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:26,330 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 4 proven. 66 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-07 10:56:26,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215144291] [2020-07-07 10:56:26,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13218226] [2020-07-07 10:56:26,331 INFO L94 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 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:26,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:26,386 INFO L264 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-07 10:56:26,388 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:26,467 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 25 proven. 57 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-07 10:56:26,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:26,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2020-07-07 10:56:26,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758643806] [2020-07-07 10:56:26,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-07 10:56:26,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:26,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-07 10:56:26,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2020-07-07 10:56:26,469 INFO L87 Difference]: Start difference. First operand 156 states and 216 transitions. Second operand 18 states. [2020-07-07 10:56:26,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:26,754 INFO L93 Difference]: Finished difference Result 322 states and 468 transitions. [2020-07-07 10:56:26,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-07 10:56:26,755 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 78 [2020-07-07 10:56:26,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:26,757 INFO L225 Difference]: With dead ends: 322 [2020-07-07 10:56:26,757 INFO L226 Difference]: Without dead ends: 202 [2020-07-07 10:56:26,759 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=271, Invalid=431, Unknown=0, NotChecked=0, Total=702 [2020-07-07 10:56:26,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-07-07 10:56:26,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 160. [2020-07-07 10:56:26,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-07-07 10:56:26,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 221 transitions. [2020-07-07 10:56:26,773 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 221 transitions. Word has length 78 [2020-07-07 10:56:26,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:26,773 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 221 transitions. [2020-07-07 10:56:26,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-07 10:56:26,774 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 221 transitions. [2020-07-07 10:56:26,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-07-07 10:56:26,775 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:26,776 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:26,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:26,978 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:26,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:26,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1669501014, now seen corresponding path program 2 times [2020-07-07 10:56:26,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:26,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640072760] [2020-07-07 10:56:26,978 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:26,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:27,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:27,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:27,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:27,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:27,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:27,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:27,180 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 4 proven. 72 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-07 10:56:27,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640072760] [2020-07-07 10:56:27,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839450053] [2020-07-07 10:56:27,180 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:27,259 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 10:56:27,259 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:56:27,261 INFO L264 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-07 10:56:27,262 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:27,439 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 25 proven. 63 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-07 10:56:27,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:27,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2020-07-07 10:56:27,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847269622] [2020-07-07 10:56:27,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-07 10:56:27,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:27,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-07 10:56:27,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-07-07 10:56:27,441 INFO L87 Difference]: Start difference. First operand 160 states and 221 transitions. Second operand 20 states. [2020-07-07 10:56:28,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:28,312 INFO L93 Difference]: Finished difference Result 323 states and 461 transitions. [2020-07-07 10:56:28,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-07 10:56:28,331 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 80 [2020-07-07 10:56:28,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:28,332 INFO L225 Difference]: With dead ends: 323 [2020-07-07 10:56:28,332 INFO L226 Difference]: Without dead ends: 200 [2020-07-07 10:56:28,334 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2020-07-07 10:56:28,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-07-07 10:56:28,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 162. [2020-07-07 10:56:28,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-07-07 10:56:28,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 224 transitions. [2020-07-07 10:56:28,347 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 224 transitions. Word has length 80 [2020-07-07 10:56:28,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:28,347 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 224 transitions. [2020-07-07 10:56:28,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-07 10:56:28,348 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 224 transitions. [2020-07-07 10:56:28,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-07-07 10:56:28,349 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:28,349 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:28,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:28,565 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:28,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:28,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1418123144, now seen corresponding path program 2 times [2020-07-07 10:56:28,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:28,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155471937] [2020-07-07 10:56:28,566 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:28,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:28,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:28,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:28,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:28,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:28,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:28,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:28,700 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 4 proven. 86 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-07 10:56:28,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155471937] [2020-07-07 10:56:28,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009610124] [2020-07-07 10:56:28,701 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:28,785 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 10:56:28,786 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:56:28,787 INFO L264 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-07 10:56:28,789 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:28,890 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 25 proven. 77 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-07 10:56:28,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:28,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2020-07-07 10:56:28,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015803786] [2020-07-07 10:56:28,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-07 10:56:28,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:28,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-07 10:56:28,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2020-07-07 10:56:28,892 INFO L87 Difference]: Start difference. First operand 162 states and 224 transitions. Second operand 20 states. [2020-07-07 10:56:29,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:29,119 INFO L93 Difference]: Finished difference Result 338 states and 493 transitions. [2020-07-07 10:56:29,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-07 10:56:29,120 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 81 [2020-07-07 10:56:29,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:29,122 INFO L225 Difference]: With dead ends: 338 [2020-07-07 10:56:29,122 INFO L226 Difference]: Without dead ends: 215 [2020-07-07 10:56:29,123 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=336, Invalid=534, Unknown=0, NotChecked=0, Total=870 [2020-07-07 10:56:29,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-07-07 10:56:29,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 166. [2020-07-07 10:56:29,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-07-07 10:56:29,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 229 transitions. [2020-07-07 10:56:29,138 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 229 transitions. Word has length 81 [2020-07-07 10:56:29,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:29,138 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 229 transitions. [2020-07-07 10:56:29,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-07 10:56:29,138 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 229 transitions. [2020-07-07 10:56:29,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-07-07 10:56:29,140 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:29,140 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:29,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-07-07 10:56:29,356 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:29,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:29,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1303245049, now seen corresponding path program 3 times [2020-07-07 10:56:29,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:29,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523389110] [2020-07-07 10:56:29,358 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:29,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:29,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:29,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:29,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:29,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:29,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:29,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:29,580 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 4 proven. 93 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-07 10:56:29,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523389110] [2020-07-07 10:56:29,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636277837] [2020-07-07 10:56:29,580 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:29,621 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-07-07 10:56:29,622 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:56:29,623 INFO L264 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-07 10:56:29,624 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:29,786 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2020-07-07 10:56:29,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:29,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2020-07-07 10:56:29,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725113456] [2020-07-07 10:56:29,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-07 10:56:29,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:29,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-07 10:56:29,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-07-07 10:56:29,789 INFO L87 Difference]: Start difference. First operand 166 states and 229 transitions. Second operand 19 states. [2020-07-07 10:56:31,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:31,001 INFO L93 Difference]: Finished difference Result 346 states and 500 transitions. [2020-07-07 10:56:31,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-07-07 10:56:31,002 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 83 [2020-07-07 10:56:31,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:31,004 INFO L225 Difference]: With dead ends: 346 [2020-07-07 10:56:31,004 INFO L226 Difference]: Without dead ends: 226 [2020-07-07 10:56:31,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=322, Invalid=1570, Unknown=0, NotChecked=0, Total=1892 [2020-07-07 10:56:31,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-07-07 10:56:31,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 183. [2020-07-07 10:56:31,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-07-07 10:56:31,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 259 transitions. [2020-07-07 10:56:31,022 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 259 transitions. Word has length 83 [2020-07-07 10:56:31,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:31,022 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 259 transitions. [2020-07-07 10:56:31,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-07 10:56:31,022 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 259 transitions. [2020-07-07 10:56:31,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-07-07 10:56:31,024 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:31,024 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:31,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:31,239 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:31,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:31,239 INFO L82 PathProgramCache]: Analyzing trace with hash -737172085, now seen corresponding path program 1 times [2020-07-07 10:56:31,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:31,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985489508] [2020-07-07 10:56:31,241 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:31,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:31,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:31,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:31,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:31,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:31,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:31,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:31,387 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 4 proven. 109 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-07 10:56:31,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985489508] [2020-07-07 10:56:31,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101646905] [2020-07-07 10:56:31,387 INFO L94 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 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:31,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:31,452 INFO L264 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-07 10:56:31,454 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:31,589 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 25 proven. 100 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-07 10:56:31,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:31,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2020-07-07 10:56:31,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722090826] [2020-07-07 10:56:31,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-07 10:56:31,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:31,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-07 10:56:31,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2020-07-07 10:56:31,594 INFO L87 Difference]: Start difference. First operand 183 states and 259 transitions. Second operand 22 states. [2020-07-07 10:56:31,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:31,968 INFO L93 Difference]: Finished difference Result 390 states and 587 transitions. [2020-07-07 10:56:31,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-07 10:56:31,969 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 84 [2020-07-07 10:56:31,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:31,971 INFO L225 Difference]: With dead ends: 390 [2020-07-07 10:56:31,971 INFO L226 Difference]: Without dead ends: 248 [2020-07-07 10:56:31,973 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2020-07-07 10:56:31,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-07-07 10:56:31,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 188. [2020-07-07 10:56:31,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-07-07 10:56:31,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 266 transitions. [2020-07-07 10:56:31,991 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 266 transitions. Word has length 84 [2020-07-07 10:56:31,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:31,991 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 266 transitions. [2020-07-07 10:56:31,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-07 10:56:31,992 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 266 transitions. [2020-07-07 10:56:31,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-07-07 10:56:31,993 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:31,994 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:32,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-07-07 10:56:32,207 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:32,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:32,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1124299316, now seen corresponding path program 1 times [2020-07-07 10:56:32,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:32,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244832303] [2020-07-07 10:56:32,208 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:32,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:32,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:32,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:32,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:32,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:32,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:32,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:32,461 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 4 proven. 117 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-07 10:56:32,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244832303] [2020-07-07 10:56:32,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946590299] [2020-07-07 10:56:32,462 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:32,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:32,535 INFO L264 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-07 10:56:32,537 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:32,796 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 25 proven. 108 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-07 10:56:32,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:32,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2020-07-07 10:56:32,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882885480] [2020-07-07 10:56:32,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-07 10:56:32,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:32,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-07 10:56:32,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2020-07-07 10:56:32,799 INFO L87 Difference]: Start difference. First operand 188 states and 266 transitions. Second operand 24 states. [2020-07-07 10:56:34,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:34,153 INFO L93 Difference]: Finished difference Result 382 states and 558 transitions. [2020-07-07 10:56:34,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-07 10:56:34,154 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 86 [2020-07-07 10:56:34,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:34,157 INFO L225 Difference]: With dead ends: 382 [2020-07-07 10:56:34,157 INFO L226 Difference]: Without dead ends: 237 [2020-07-07 10:56:34,158 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=238, Invalid=952, Unknown=0, NotChecked=0, Total=1190 [2020-07-07 10:56:34,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-07-07 10:56:34,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 190. [2020-07-07 10:56:34,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-07-07 10:56:34,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 269 transitions. [2020-07-07 10:56:34,176 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 269 transitions. Word has length 86 [2020-07-07 10:56:34,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:34,176 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 269 transitions. [2020-07-07 10:56:34,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-07 10:56:34,176 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 269 transitions. [2020-07-07 10:56:34,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-07-07 10:56:34,178 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:34,178 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:34,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:34,392 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:34,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:34,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1955535014, now seen corresponding path program 2 times [2020-07-07 10:56:34,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:34,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883239589] [2020-07-07 10:56:34,392 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:34,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:34,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:34,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:34,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:34,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:34,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:34,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:34,563 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 4 proven. 135 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-07 10:56:34,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883239589] [2020-07-07 10:56:34,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013619639] [2020-07-07 10:56:34,563 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:34,644 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-07-07 10:56:34,644 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:56:34,645 INFO L264 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 29 conjunts are in the unsatisfiable core [2020-07-07 10:56:34,647 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:35,329 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2020-07-07 10:56:35,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-07 10:56:35,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [13] total 26 [2020-07-07 10:56:35,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448587736] [2020-07-07 10:56:35,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-07 10:56:35,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:35,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-07 10:56:35,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2020-07-07 10:56:35,331 INFO L87 Difference]: Start difference. First operand 190 states and 269 transitions. Second operand 15 states. [2020-07-07 10:56:36,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:36,049 INFO L93 Difference]: Finished difference Result 236 states and 329 transitions. [2020-07-07 10:56:36,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-07 10:56:36,051 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 87 [2020-07-07 10:56:36,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:36,053 INFO L225 Difference]: With dead ends: 236 [2020-07-07 10:56:36,053 INFO L226 Difference]: Without dead ends: 223 [2020-07-07 10:56:36,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=152, Invalid=904, Unknown=0, NotChecked=0, Total=1056 [2020-07-07 10:56:36,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-07-07 10:56:36,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 208. [2020-07-07 10:56:36,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-07-07 10:56:36,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 296 transitions. [2020-07-07 10:56:36,082 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 296 transitions. Word has length 87 [2020-07-07 10:56:36,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:36,082 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 296 transitions. [2020-07-07 10:56:36,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-07 10:56:36,082 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 296 transitions. [2020-07-07 10:56:36,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-07-07 10:56:36,085 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:36,086 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:36,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-07-07 10:56:36,301 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:36,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:36,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1471849570, now seen corresponding path program 1 times [2020-07-07 10:56:36,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:36,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975301881] [2020-07-07 10:56:36,302 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:36,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:36,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:36,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:36,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:36,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:36,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:36,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:36,488 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 4 proven. 135 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-07 10:56:36,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975301881] [2020-07-07 10:56:36,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392783524] [2020-07-07 10:56:36,489 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:36,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:36,597 INFO L264 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-07 10:56:36,599 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:36,777 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 25 proven. 126 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-07 10:56:36,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:36,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2020-07-07 10:56:36,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422060282] [2020-07-07 10:56:36,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-07 10:56:36,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:36,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-07 10:56:36,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=344, Unknown=0, NotChecked=0, Total=552 [2020-07-07 10:56:36,781 INFO L87 Difference]: Start difference. First operand 208 states and 296 transitions. Second operand 24 states. [2020-07-07 10:56:37,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:37,162 INFO L93 Difference]: Finished difference Result 442 states and 667 transitions. [2020-07-07 10:56:37,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-07 10:56:37,164 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 87 [2020-07-07 10:56:37,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:37,167 INFO L225 Difference]: With dead ends: 442 [2020-07-07 10:56:37,167 INFO L226 Difference]: Without dead ends: 279 [2020-07-07 10:56:37,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=487, Invalid=773, Unknown=0, NotChecked=0, Total=1260 [2020-07-07 10:56:37,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-07-07 10:56:37,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 212. [2020-07-07 10:56:37,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-07-07 10:56:37,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 301 transitions. [2020-07-07 10:56:37,193 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 301 transitions. Word has length 87 [2020-07-07 10:56:37,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:37,194 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 301 transitions. [2020-07-07 10:56:37,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-07 10:56:37,194 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 301 transitions. [2020-07-07 10:56:37,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-07-07 10:56:37,196 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:37,196 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:37,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-07-07 10:56:37,410 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:37,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:37,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1038683167, now seen corresponding path program 1 times [2020-07-07 10:56:37,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:37,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654597314] [2020-07-07 10:56:37,411 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:37,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:37,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:37,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:37,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:37,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:37,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:37,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:37,695 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 4 proven. 145 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-07 10:56:37,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654597314] [2020-07-07 10:56:37,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917046035] [2020-07-07 10:56:37,696 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:37,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:37,750 INFO L264 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-07 10:56:37,752 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:38,067 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 26 proven. 135 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-07 10:56:38,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:38,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2020-07-07 10:56:38,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940605384] [2020-07-07 10:56:38,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-07 10:56:38,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:38,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-07 10:56:38,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2020-07-07 10:56:38,069 INFO L87 Difference]: Start difference. First operand 212 states and 301 transitions. Second operand 26 states. [2020-07-07 10:56:39,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:39,572 INFO L93 Difference]: Finished difference Result 431 states and 631 transitions. [2020-07-07 10:56:39,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-07 10:56:39,573 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 89 [2020-07-07 10:56:39,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:39,578 INFO L225 Difference]: With dead ends: 431 [2020-07-07 10:56:39,578 INFO L226 Difference]: Without dead ends: 265 [2020-07-07 10:56:39,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=272, Invalid=1134, Unknown=0, NotChecked=0, Total=1406 [2020-07-07 10:56:39,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-07-07 10:56:39,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 214. [2020-07-07 10:56:39,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-07-07 10:56:39,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 304 transitions. [2020-07-07 10:56:39,642 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 304 transitions. Word has length 89 [2020-07-07 10:56:39,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:39,642 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 304 transitions. [2020-07-07 10:56:39,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-07 10:56:39,642 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 304 transitions. [2020-07-07 10:56:39,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-07-07 10:56:39,644 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:39,644 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:39,845 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-07-07 10:56:39,845 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:39,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:39,846 INFO L82 PathProgramCache]: Analyzing trace with hash -953248913, now seen corresponding path program 2 times [2020-07-07 10:56:39,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:39,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605894922] [2020-07-07 10:56:39,847 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:39,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:39,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:39,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:39,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:40,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:40,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:40,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:40,040 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 4 proven. 164 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-07 10:56:40,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605894922] [2020-07-07 10:56:40,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498631506] [2020-07-07 10:56:40,041 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:40,110 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 10:56:40,110 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:56:40,111 INFO L264 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-07 10:56:40,113 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:40,275 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 25 proven. 155 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-07 10:56:40,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:40,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2020-07-07 10:56:40,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659213391] [2020-07-07 10:56:40,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-07 10:56:40,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:40,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-07 10:56:40,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=405, Unknown=0, NotChecked=0, Total=650 [2020-07-07 10:56:40,277 INFO L87 Difference]: Start difference. First operand 214 states and 304 transitions. Second operand 26 states. [2020-07-07 10:56:41,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:41,037 INFO L93 Difference]: Finished difference Result 458 states and 693 transitions. [2020-07-07 10:56:41,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-07 10:56:41,038 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 90 [2020-07-07 10:56:41,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:41,041 INFO L225 Difference]: With dead ends: 458 [2020-07-07 10:56:41,041 INFO L226 Difference]: Without dead ends: 292 [2020-07-07 10:56:41,043 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=573, Invalid=909, Unknown=0, NotChecked=0, Total=1482 [2020-07-07 10:56:41,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-07-07 10:56:41,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 218. [2020-07-07 10:56:41,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-07-07 10:56:41,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 309 transitions. [2020-07-07 10:56:41,514 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 309 transitions. Word has length 90 [2020-07-07 10:56:41,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:56:41,514 INFO L479 AbstractCegarLoop]: Abstraction has 218 states and 309 transitions. [2020-07-07 10:56:41,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-07 10:56:41,514 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 309 transitions. [2020-07-07 10:56:41,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-07-07 10:56:41,516 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:56:41,517 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:56:41,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-07-07 10:56:41,730 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:56:41,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:56:41,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1197708208, now seen corresponding path program 2 times [2020-07-07 10:56:41,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:56:41,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404111491] [2020-07-07 10:56:41,731 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:56:41,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:41,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:41,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:41,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:42,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:42,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:42,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:56:42,033 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 4 proven. 175 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-07 10:56:42,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404111491] [2020-07-07 10:56:42,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533499325] [2020-07-07 10:56:42,034 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:56:42,101 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 10:56:42,102 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:56:42,103 INFO L264 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-07 10:56:42,105 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:56:42,457 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 26 proven. 165 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-07 10:56:42,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:56:42,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2020-07-07 10:56:42,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885079175] [2020-07-07 10:56:42,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-07 10:56:42,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:56:42,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-07 10:56:42,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2020-07-07 10:56:42,459 INFO L87 Difference]: Start difference. First operand 218 states and 309 transitions. Second operand 28 states. [2020-07-07 10:56:49,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:56:49,746 INFO L93 Difference]: Finished difference Result 444 states and 650 transitions. [2020-07-07 10:56:49,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-07 10:56:49,747 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 92 [2020-07-07 10:56:49,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:56:49,751 INFO L225 Difference]: With dead ends: 444 [2020-07-07 10:56:49,751 INFO L226 Difference]: Without dead ends: 275 [2020-07-07 10:56:49,753 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=308, Invalid=1332, Unknown=0, NotChecked=0, Total=1640 [2020-07-07 10:56:49,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-07-07 10:57:01,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 220. [2020-07-07 10:57:01,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-07-07 10:57:01,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 312 transitions. [2020-07-07 10:57:01,352 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 312 transitions. Word has length 92 [2020-07-07 10:57:01,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:57:01,352 INFO L479 AbstractCegarLoop]: Abstraction has 220 states and 312 transitions. [2020-07-07 10:57:01,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-07 10:57:01,352 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 312 transitions. [2020-07-07 10:57:01,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-07-07 10:57:01,354 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:57:01,354 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:57:01,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-07-07 10:57:01,568 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:57:01,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:57:01,568 INFO L82 PathProgramCache]: Analyzing trace with hash -318439938, now seen corresponding path program 3 times [2020-07-07 10:57:01,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:57:01,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215766540] [2020-07-07 10:57:01,568 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:57:01,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:01,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:01,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:01,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:01,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:01,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:01,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:01,772 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 4 proven. 196 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-07 10:57:01,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215766540] [2020-07-07 10:57:01,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408009899] [2020-07-07 10:57:01,773 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:57:01,837 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-07-07 10:57:01,837 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 10:57:01,838 INFO L264 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-07 10:57:01,841 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:57:02,004 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2020-07-07 10:57:02,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:57:02,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 22 [2020-07-07 10:57:02,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709606682] [2020-07-07 10:57:02,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-07 10:57:02,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:57:02,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-07 10:57:02,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2020-07-07 10:57:02,006 INFO L87 Difference]: Start difference. First operand 220 states and 312 transitions. Second operand 22 states. [2020-07-07 10:57:23,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:57:23,403 INFO L93 Difference]: Finished difference Result 453 states and 682 transitions. [2020-07-07 10:57:23,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-07 10:57:23,405 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 93 [2020-07-07 10:57:23,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:57:23,408 INFO L225 Difference]: With dead ends: 453 [2020-07-07 10:57:23,408 INFO L226 Difference]: Without dead ends: 272 [2020-07-07 10:57:23,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=261, Invalid=795, Unknown=0, NotChecked=0, Total=1056 [2020-07-07 10:57:23,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-07-07 10:57:35,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 208. [2020-07-07 10:57:35,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-07-07 10:57:35,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 284 transitions. [2020-07-07 10:57:35,018 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 284 transitions. Word has length 93 [2020-07-07 10:57:35,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:57:35,018 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 284 transitions. [2020-07-07 10:57:35,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-07 10:57:35,019 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 284 transitions. [2020-07-07 10:57:35,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-07-07 10:57:35,020 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:57:35,020 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:57:35,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:57:35,235 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:57:35,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:57:35,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1057957250, now seen corresponding path program 1 times [2020-07-07 10:57:35,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:57:35,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898383504] [2020-07-07 10:57:35,237 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:57:35,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:35,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:35,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:35,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:35,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:35,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:35,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:35,573 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 6 proven. 207 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-07 10:57:35,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898383504] [2020-07-07 10:57:35,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303604471] [2020-07-07 10:57:35,574 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:57:35,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:57:35,627 INFO L264 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-07 10:57:35,629 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:57:35,691 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2020-07-07 10:57:35,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-07 10:57:35,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [16] total 18 [2020-07-07 10:57:35,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221570862] [2020-07-07 10:57:35,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 10:57:35,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:57:35,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 10:57:35,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-07-07 10:57:35,694 INFO L87 Difference]: Start difference. First operand 208 states and 284 transitions. Second operand 4 states. [2020-07-07 10:58:20,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 10:58:20,420 INFO L93 Difference]: Finished difference Result 347 states and 478 transitions. [2020-07-07 10:58:20,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 10:58:20,421 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 96 [2020-07-07 10:58:20,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 10:58:20,426 INFO L225 Difference]: With dead ends: 347 [2020-07-07 10:58:20,427 INFO L226 Difference]: Without dead ends: 212 [2020-07-07 10:58:20,428 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2020-07-07 10:58:20,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-07-07 10:59:07,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 198. [2020-07-07 10:59:07,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-07-07 10:59:07,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 265 transitions. [2020-07-07 10:59:07,894 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 265 transitions. Word has length 96 [2020-07-07 10:59:07,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 10:59:07,894 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 265 transitions. [2020-07-07 10:59:07,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 10:59:07,894 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 265 transitions. [2020-07-07 10:59:07,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-07-07 10:59:07,895 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 10:59:07,895 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 10:59:08,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:59:08,103 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 10:59:08,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 10:59:08,104 INFO L82 PathProgramCache]: Analyzing trace with hash -224584796, now seen corresponding path program 1 times [2020-07-07 10:59:08,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 10:59:08,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382649533] [2020-07-07 10:59:08,104 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 10:59:08,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:08,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:08,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:08,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:08,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:08,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:08,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:08,503 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 4 proven. 209 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-07 10:59:08,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382649533] [2020-07-07 10:59:08,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30588209] [2020-07-07 10:59:08,504 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 10:59:08,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 10:59:08,572 INFO L264 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 29 conjunts are in the unsatisfiable core [2020-07-07 10:59:08,574 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 10:59:09,175 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 27 proven. 198 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-07 10:59:09,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 10:59:09,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2020-07-07 10:59:09,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607805413] [2020-07-07 10:59:09,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-07 10:59:09,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 10:59:09,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-07 10:59:09,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2020-07-07 10:59:09,179 INFO L87 Difference]: Start difference. First operand 198 states and 265 transitions. Second operand 30 states.