/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_10-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 17:02:26,827 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 17:02:26,832 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 17:02:26,872 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 17:02:26,874 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 17:02:26,881 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 17:02:26,883 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 17:02:26,887 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 17:02:26,890 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 17:02:26,893 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 17:02:26,895 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 17:02:26,896 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 17:02:26,896 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 17:02:26,899 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 17:02:26,902 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 17:02:26,903 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 17:02:26,904 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 17:02:26,906 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 17:02:26,907 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 17:02:26,917 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 17:02:26,919 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 17:02:26,920 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 17:02:26,921 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 17:02:26,922 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 17:02:26,934 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 17:02:26,934 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 17:02:26,935 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 17:02:26,943 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 17:02:26,943 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 17:02:26,945 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 17:02:26,945 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 17:02:26,947 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 17:02:26,948 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 17:02:26,949 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 17:02:26,950 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 17:02:26,951 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 17:02:26,951 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 17:02:26,952 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 17:02:26,952 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 17:02:26,954 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 17:02:26,955 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 17:02:26,955 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 17:02:27,003 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 17:02:27,004 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 17:02:27,006 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 17:02:27,006 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 17:02:27,007 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 17:02:27,007 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 17:02:27,007 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 17:02:27,007 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 17:02:27,008 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 17:02:27,008 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 17:02:27,009 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 17:02:27,009 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 17:02:27,009 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 17:02:27,010 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 17:02:27,010 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 17:02:27,010 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 17:02:27,010 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 17:02:27,010 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 17:02:27,011 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 17:02:27,011 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 17:02:27,011 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 17:02:27,011 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 17:02:27,012 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 17:02:27,012 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 17:02:27,012 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 17:02:27,012 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 17:02:27,012 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 17:02:27,013 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 17:02:27,013 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 17:02:27,013 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;log-additional-information=true; [2020-09-24 17:02:27,476 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 17:02:27,496 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 17:02:27,500 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 17:02:27,503 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 17:02:27,503 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 17:02:27,504 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_10-2.c [2020-09-24 17:02:27,577 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bcd135192/98b29bf4be6d45c98e336c70b0c23218/FLAG3425c7121 [2020-09-24 17:02:28,093 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 17:02:28,094 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_10-2.c [2020-09-24 17:02:28,104 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bcd135192/98b29bf4be6d45c98e336c70b0c23218/FLAG3425c7121 [2020-09-24 17:02:28,447 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bcd135192/98b29bf4be6d45c98e336c70b0c23218 [2020-09-24 17:02:28,462 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 17:02:28,468 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 17:02:28,469 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 17:02:28,469 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 17:02:28,474 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 17:02:28,475 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:02:28" (1/1) ... [2020-09-24 17:02:28,479 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e001708 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:02:28, skipping insertion in model container [2020-09-24 17:02:28,479 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:02:28" (1/1) ... [2020-09-24 17:02:28,488 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 17:02:28,512 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 17:02:28,723 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 17:02:28,728 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 17:02:28,745 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 17:02:28,760 INFO L208 MainTranslator]: Completed translation [2020-09-24 17:02:28,761 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:02:28 WrapperNode [2020-09-24 17:02:28,761 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 17:02:28,762 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 17:02:28,762 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 17:02:28,762 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 17:02:28,778 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:02:28" (1/1) ... [2020-09-24 17:02:28,778 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:02:28" (1/1) ... [2020-09-24 17:02:28,868 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:02:28" (1/1) ... [2020-09-24 17:02:28,869 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:02:28" (1/1) ... [2020-09-24 17:02:28,878 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:02:28" (1/1) ... [2020-09-24 17:02:28,881 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:02:28" (1/1) ... [2020-09-24 17:02:28,882 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:02:28" (1/1) ... [2020-09-24 17:02:28,883 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 17:02:28,884 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 17:02:28,884 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 17:02:28,884 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 17:02:28,885 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:02:28" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-24 17:02:28,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 17:02:28,952 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 17:02:28,952 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-09-24 17:02:28,952 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 17:02:28,952 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 17:02:28,953 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 17:02:28,953 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-09-24 17:02:28,953 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 17:02:28,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 17:02:28,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 17:02:29,155 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 17:02:29,156 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 17:02:29,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:02:29 BoogieIcfgContainer [2020-09-24 17:02:29,161 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 17:02:29,162 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 17:02:29,163 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 17:02:29,166 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 17:02:29,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 05:02:28" (1/3) ... [2020-09-24 17:02:29,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7edb3b7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:02:29, skipping insertion in model container [2020-09-24 17:02:29,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:02:28" (2/3) ... [2020-09-24 17:02:29,169 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7edb3b7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:02:29, skipping insertion in model container [2020-09-24 17:02:29,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:02:29" (3/3) ... [2020-09-24 17:02:29,171 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_10-2.c [2020-09-24 17:02:29,187 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 17:02:29,197 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 17:02:29,224 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 17:02:29,269 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 17:02:29,269 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 17:02:29,270 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 17:02:29,270 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 17:02:29,270 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 17:02:29,270 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 17:02:29,271 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 17:02:29,271 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 17:02:29,297 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-09-24 17:02:29,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-24 17:02:29,306 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:02:29,307 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:02:29,308 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:02:29,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:02:29,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1756383024, now seen corresponding path program 1 times [2020-09-24 17:02:29,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:02:29,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1594345198] [2020-09-24 17:02:29,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:02:29,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:29,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:29,499 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:29,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 17:02:29,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:29,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-09-24 17:02:29,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:29,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:02:29,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 17:02:29,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 17:02:29,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 17:02:29,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:02:29,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:29,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:29,567 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:29,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:02:29,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:29,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 17:02:29,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:29,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:02:29,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:02:29,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:02:29,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:02:29,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 17:02:29,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:29,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:29,617 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:29,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:02:29,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:29,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-09-24 17:02:29,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:29,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:02:29,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 17:02:29,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 17:02:29,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 17:02:29,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:02:29,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1594345198] [2020-09-24 17:02:29,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:02:29,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 17:02:29,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094975376] [2020-09-24 17:02:29,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 17:02:29,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:02:29,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 17:02:29,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 17:02:29,720 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 5 states. [2020-09-24 17:02:29,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:02:29,845 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2020-09-24 17:02:29,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 17:02:29,847 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-09-24 17:02:29,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:02:29,861 INFO L225 Difference]: With dead ends: 44 [2020-09-24 17:02:29,861 INFO L226 Difference]: Without dead ends: 28 [2020-09-24 17:02:29,866 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 17:02:29,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-09-24 17:02:29,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-09-24 17:02:29,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-24 17:02:29,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-09-24 17:02:29,919 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 16 [2020-09-24 17:02:29,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:02:29,920 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-09-24 17:02:29,920 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 17:02:29,921 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-09-24 17:02:29,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-24 17:02:29,923 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:02:29,923 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:02:29,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 17:02:29,924 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:02:29,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:02:29,925 INFO L82 PathProgramCache]: Analyzing trace with hash -389703589, now seen corresponding path program 1 times [2020-09-24 17:02:29,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:02:29,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [170517117] [2020-09-24 17:02:29,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:02:29,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:29,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:30,012 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:30,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-24 17:02:30,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:30,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-09-24 17:02:30,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:30,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:02:30,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 17:02:30,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 17:02:30,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:02:30,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:02:30,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:30,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:30,042 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:30,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:02:30,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:30,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 17:02:30,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:30,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:02:30,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:02:30,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:02:30,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:02:30,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 17:02:30,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:30,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:30,148 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:30,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 17:02:30,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:30,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-09-24 17:02:30,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:30,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:02:30,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 17:02:30,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 17:02:30,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 17:02:30,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:02:30,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [170517117] [2020-09-24 17:02:30,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:02:30,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 17:02:30,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843044463] [2020-09-24 17:02:30,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 17:02:30,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:02:30,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 17:02:30,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 17:02:30,201 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2020-09-24 17:02:30,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:02:30,277 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2020-09-24 17:02:30,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 17:02:30,278 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-09-24 17:02:30,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:02:30,280 INFO L225 Difference]: With dead ends: 36 [2020-09-24 17:02:30,280 INFO L226 Difference]: Without dead ends: 30 [2020-09-24 17:02:30,281 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 17:02:30,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-24 17:02:30,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-09-24 17:02:30,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-24 17:02:30,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-09-24 17:02:30,289 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 17 [2020-09-24 17:02:30,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:02:30,290 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-09-24 17:02:30,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 17:02:30,290 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-09-24 17:02:30,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-24 17:02:30,292 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:02:30,293 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:02:30,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 17:02:30,293 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:02:30,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:02:30,293 INFO L82 PathProgramCache]: Analyzing trace with hash 50309368, now seen corresponding path program 1 times [2020-09-24 17:02:30,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:02:30,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1411599328] [2020-09-24 17:02:30,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:02:30,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:30,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:30,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:30,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:30,857 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:30,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-24 17:02:30,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 17:02:30,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 550 [2020-09-24 17:02:30,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:30,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 17:02:30,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 17:02:30,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-24 17:02:30,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:02:30,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:02:30,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:30,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:30,877 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:30,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:02:30,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:30,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 17:02:30,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:30,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:02:30,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:02:30,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:02:30,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:02:30,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 17:02:30,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:30,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:30,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:30,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:31,140 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:31,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-24 17:02:31,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 17:02:31,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 252 [2020-09-24 17:02:31,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:31,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 17:02:31,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 17:02:31,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 17:02:31,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:02:31,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 17:02:31,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:31,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:31,182 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:31,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:02:31,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:31,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 17:02:31,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:31,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:02:31,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 17:02:31,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 17:02:31,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:02:31,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-24 17:02:31,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:31,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:31,215 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:31,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:02:31,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:31,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 17:02:31,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:31,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:02:31,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-24 17:02:31,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:02:31,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:02:31,223 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-24 17:02:31,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1411599328] [2020-09-24 17:02:31,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:02:31,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 17:02:31,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541582196] [2020-09-24 17:02:31,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 17:02:31,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:02:31,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 17:02:31,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-24 17:02:31,226 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 7 states. [2020-09-24 17:02:31,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:02:31,320 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2020-09-24 17:02:31,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 17:02:31,321 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-09-24 17:02:31,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:02:31,323 INFO L225 Difference]: With dead ends: 52 [2020-09-24 17:02:31,323 INFO L226 Difference]: Without dead ends: 30 [2020-09-24 17:02:31,324 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-24 17:02:31,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-24 17:02:31,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-09-24 17:02:31,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-24 17:02:31,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-09-24 17:02:31,333 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 33 [2020-09-24 17:02:31,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:02:31,333 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-09-24 17:02:31,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 17:02:31,333 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-09-24 17:02:31,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-24 17:02:31,335 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:02:31,335 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 17:02:31,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 17:02:31,336 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:02:31,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:02:31,337 INFO L82 PathProgramCache]: Analyzing trace with hash -643371531, now seen corresponding path program 1 times [2020-09-24 17:02:31,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:02:31,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1184076989] [2020-09-24 17:02:31,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:02:31,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:31,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:31,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:31,738 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:31,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-24 17:02:31,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:02:31,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 390 [2020-09-24 17:02:31,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:31,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 17:02:31,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 17:02:31,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-24 17:02:31,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:02:31,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:02:31,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:31,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:31,762 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:31,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:02:31,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:31,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 17:02:31,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:31,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:02:31,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:02:31,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:02:31,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:02:31,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 17:02:31,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:31,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:31,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:32,111 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:32,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-24 17:02:32,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:02:32,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 333 [2020-09-24 17:02:32,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:32,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 17:02:32,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 17:02:32,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-24 17:02:32,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:02:32,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 17:02:32,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:32,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:32,156 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:32,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 17:02:32,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:32,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-24 17:02:32,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:32,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:02:32,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:02:32,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 17:02:32,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:02:32,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 17:02:32,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:32,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:32,172 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:32,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:02:32,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:32,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 17:02:32,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:32,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 17:02:32,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:02:32,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 17:02:32,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:02:32,202 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-24 17:02:32,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1184076989] [2020-09-24 17:02:32,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:02:32,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 17:02:32,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993493466] [2020-09-24 17:02:32,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 17:02:32,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:02:32,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 17:02:32,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-24 17:02:32,205 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 7 states. [2020-09-24 17:02:32,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:02:32,289 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2020-09-24 17:02:32,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 17:02:32,290 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2020-09-24 17:02:32,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:02:32,292 INFO L225 Difference]: With dead ends: 42 [2020-09-24 17:02:32,292 INFO L226 Difference]: Without dead ends: 36 [2020-09-24 17:02:32,293 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-09-24 17:02:32,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-09-24 17:02:32,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-09-24 17:02:32,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-24 17:02:32,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-09-24 17:02:32,301 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 34 [2020-09-24 17:02:32,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:02:32,301 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-09-24 17:02:32,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 17:02:32,302 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-09-24 17:02:32,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-24 17:02:32,303 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:02:32,304 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-09-24 17:02:32,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 17:02:32,304 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:02:32,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:02:32,304 INFO L82 PathProgramCache]: Analyzing trace with hash 765810174, now seen corresponding path program 1 times [2020-09-24 17:02:32,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:02:32,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217206700] [2020-09-24 17:02:32,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:02:32,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:32,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:32,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:32,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:32,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:32,795 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:32,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-09-24 17:02:32,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 17:02:32,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 482 [2020-09-24 17:02:32,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:32,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 17:02:32,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 17:02:32,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-24 17:02:32,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:02:32,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:02:32,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:32,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:32,807 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:32,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:02:32,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:32,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 17:02:32,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:32,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:02:32,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:02:32,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:02:32,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:02:32,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 17:02:32,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:32,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:32,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:32,923 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:32,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-24 17:02:32,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:02:32,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-09-24 17:02:32,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:32,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 17:02:32,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-24 17:02:32,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-24 17:02:32,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:02:32,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 17:02:32,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:32,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:32,958 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:32,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 17:02:32,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:32,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-24 17:02:32,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:32,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:02:32,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:02:32,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 17:02:32,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:02:32,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 17:02:32,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:32,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:32,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:33,009 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:33,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 17:02:33,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:02:33,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-09-24 17:02:33,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:33,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:02:33,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 17:02:33,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 17:02:33,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:02:33,028 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-24 17:02:33,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217206700] [2020-09-24 17:02:33,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:02:33,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 17:02:33,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038078055] [2020-09-24 17:02:33,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 17:02:33,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:02:33,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 17:02:33,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-24 17:02:33,030 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 6 states. [2020-09-24 17:02:33,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:02:33,148 INFO L93 Difference]: Finished difference Result 72 states and 93 transitions. [2020-09-24 17:02:33,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 17:02:33,150 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2020-09-24 17:02:33,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:02:33,151 INFO L225 Difference]: With dead ends: 72 [2020-09-24 17:02:33,152 INFO L226 Difference]: Without dead ends: 44 [2020-09-24 17:02:33,153 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-09-24 17:02:33,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-24 17:02:33,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2020-09-24 17:02:33,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-24 17:02:33,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-09-24 17:02:33,162 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 35 [2020-09-24 17:02:33,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:02:33,163 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-09-24 17:02:33,163 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 17:02:33,163 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-09-24 17:02:33,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-24 17:02:33,166 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:02:33,166 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:02:33,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 17:02:33,167 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:02:33,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:02:33,167 INFO L82 PathProgramCache]: Analyzing trace with hash 99184320, now seen corresponding path program 2 times [2020-09-24 17:02:33,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:02:33,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [773848642] [2020-09-24 17:02:33,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:02:33,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:33,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:33,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:33,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:35,239 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:35,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-24 17:02:35,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 17:02:35,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2061 [2020-09-24 17:02:35,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:35,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 17:02:35,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 17:02:35,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-24 17:02:35,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:02:35,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:02:35,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:35,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:35,261 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:35,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:02:35,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:35,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 17:02:35,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:35,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:02:35,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:02:35,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:02:35,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:02:35,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 17:02:35,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:35,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:35,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:35,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:37,259 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:37,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-24 17:02:37,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 17:02:37,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1987 [2020-09-24 17:02:37,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:37,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 17:02:37,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 17:02:37,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-09-24 17:02:37,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:02:37,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 17:02:37,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:37,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:37,336 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:37,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-24 17:02:37,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:37,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-09-24 17:02:37,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:37,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:02:37,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:02:37,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-24 17:02:37,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:02:37,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 17:02:37,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:37,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:37,349 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:37,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 17:02:37,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:37,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 17:02:37,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:37,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:02:37,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:02:37,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:02:37,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:02:37,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 17:02:37,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:37,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:37,359 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:37,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:02:37,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:37,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 17:02:37,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:37,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:02:37,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:02:37,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:02:37,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:02:37,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 17:02:37,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:37,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:37,388 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:37,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 17:02:37,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:37,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-24 17:02:37,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:37,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 17:02:37,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:02:37,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 17:02:37,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:02:37,427 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 24 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-09-24 17:02:37,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [773848642] [2020-09-24 17:02:37,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:02:37,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 17:02:37,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160350395] [2020-09-24 17:02:37,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 17:02:37,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:02:37,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 17:02:37,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-24 17:02:37,429 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 7 states. [2020-09-24 17:02:37,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:02:37,553 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-09-24 17:02:37,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 17:02:37,553 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 52 [2020-09-24 17:02:37,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:02:37,555 INFO L225 Difference]: With dead ends: 50 [2020-09-24 17:02:37,555 INFO L226 Difference]: Without dead ends: 44 [2020-09-24 17:02:37,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-09-24 17:02:37,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-24 17:02:37,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2020-09-24 17:02:37,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-24 17:02:37,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-09-24 17:02:37,564 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 52 [2020-09-24 17:02:37,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:02:37,565 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-09-24 17:02:37,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 17:02:37,565 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-09-24 17:02:37,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-09-24 17:02:37,568 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:02:37,568 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:02:37,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 17:02:37,569 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:02:37,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:02:37,569 INFO L82 PathProgramCache]: Analyzing trace with hash 501566307, now seen corresponding path program 3 times [2020-09-24 17:02:37,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:02:37,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1100151420] [2020-09-24 17:02:37,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:02:37,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:37,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:37,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:37,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:37,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:37,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:37,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:38,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:38,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:41,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:41,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:44,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:44,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:44,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:44,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:57,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:57,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:57,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:58,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:59,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:03:05,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking...