/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_20-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 17:02:31,080 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 17:02:31,084 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 17:02:31,110 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 17:02:31,110 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 17:02:31,111 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 17:02:31,113 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 17:02:31,115 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 17:02:31,116 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 17:02:31,117 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 17:02:31,118 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 17:02:31,119 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 17:02:31,120 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 17:02:31,121 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 17:02:31,122 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 17:02:31,124 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 17:02:31,128 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 17:02:31,129 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 17:02:31,133 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 17:02:31,136 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 17:02:31,138 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 17:02:31,139 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 17:02:31,140 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 17:02:31,145 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 17:02:31,149 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 17:02:31,150 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 17:02:31,150 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 17:02:31,151 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 17:02:31,151 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 17:02:31,155 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 17:02:31,155 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 17:02:31,156 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 17:02:31,158 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 17:02:31,158 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 17:02:31,160 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 17:02:31,160 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 17:02:31,161 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 17:02:31,161 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 17:02:31,162 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 17:02:31,163 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 17:02:31,164 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 17:02:31,165 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 17:02:31,221 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 17:02:31,221 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 17:02:31,223 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 17:02:31,223 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 17:02:31,223 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 17:02:31,223 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 17:02:31,224 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 17:02:31,225 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 17:02:31,225 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 17:02:31,225 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 17:02:31,225 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 17:02:31,225 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 17:02:31,226 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 17:02:31,226 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 17:02:31,226 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 17:02:31,226 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 17:02:31,226 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 17:02:31,227 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 17:02:31,228 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 17:02:31,228 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 17:02:31,228 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 17:02:31,229 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 17:02:31,229 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 17:02:31,229 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 17:02:31,229 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 17:02:31,230 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 17:02:31,230 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 17:02:31,230 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 17:02:31,230 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 17:02:31,230 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 17:02:31,718 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 17:02:31,741 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 17:02:31,745 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 17:02:31,747 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 17:02:31,747 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 17:02:31,749 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_20-2.c [2020-09-24 17:02:31,826 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c09719745/817f55df55cb482c8f8a23179f89926a/FLAGa4b70e19f [2020-09-24 17:02:32,355 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 17:02:32,356 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_20-2.c [2020-09-24 17:02:32,365 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c09719745/817f55df55cb482c8f8a23179f89926a/FLAGa4b70e19f [2020-09-24 17:02:32,692 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c09719745/817f55df55cb482c8f8a23179f89926a [2020-09-24 17:02:32,705 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 17:02:32,711 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 17:02:32,712 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 17:02:32,713 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 17:02:32,717 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 17:02:32,718 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:02:32" (1/1) ... [2020-09-24 17:02:32,723 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ff870af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:02:32, skipping insertion in model container [2020-09-24 17:02:32,724 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:02:32" (1/1) ... [2020-09-24 17:02:32,734 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 17:02:32,763 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 17:02:32,988 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 17:02:32,993 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 17:02:33,010 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 17:02:33,026 INFO L208 MainTranslator]: Completed translation [2020-09-24 17:02:33,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:02:33 WrapperNode [2020-09-24 17:02:33,027 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 17:02:33,028 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 17:02:33,028 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 17:02:33,028 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 17:02:33,041 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:02:33" (1/1) ... [2020-09-24 17:02:33,042 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:02:33" (1/1) ... [2020-09-24 17:02:33,047 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:02:33" (1/1) ... [2020-09-24 17:02:33,047 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:02:33" (1/1) ... [2020-09-24 17:02:33,051 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:02:33" (1/1) ... [2020-09-24 17:02:33,054 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:02:33" (1/1) ... [2020-09-24 17:02:33,055 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:02:33" (1/1) ... [2020-09-24 17:02:33,056 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 17:02:33,056 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 17:02:33,056 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 17:02:33,057 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 17:02:33,057 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:02:33" (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 17:02:33,226 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 17:02:33,227 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 17:02:33,227 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-09-24 17:02:33,228 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 17:02:33,228 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 17:02:33,228 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 17:02:33,228 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-09-24 17:02:33,228 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 17:02:33,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 17:02:33,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 17:02:33,432 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 17:02:33,432 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 17:02:33,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:02:33 BoogieIcfgContainer [2020-09-24 17:02:33,438 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 17:02:33,452 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 17:02:33,453 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 17:02:33,458 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 17:02:33,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 05:02:32" (1/3) ... [2020-09-24 17:02:33,467 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b8b4fac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:02:33, skipping insertion in model container [2020-09-24 17:02:33,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:02:33" (2/3) ... [2020-09-24 17:02:33,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b8b4fac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:02:33, skipping insertion in model container [2020-09-24 17:02:33,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:02:33" (3/3) ... [2020-09-24 17:02:33,472 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_20-2.c [2020-09-24 17:02:33,500 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 17:02:33,512 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 17:02:33,536 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 17:02:33,570 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 17:02:33,570 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 17:02:33,570 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 17:02:33,571 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 17:02:33,571 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 17:02:33,571 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 17:02:33,571 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 17:02:33,571 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 17:02:33,591 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-09-24 17:02:33,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-24 17:02:33,598 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:02:33,599 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:02:33,600 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:02:33,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:02:33,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1756383024, now seen corresponding path program 1 times [2020-09-24 17:02:33,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:02:33,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [47694877] [2020-09-24 17:02:33,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:02:33,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:33,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:33,786 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:33,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 17:02:33,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:33,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-09-24 17:02:33,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:33,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:02:33,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 17:02:33,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 17:02:33,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:02:33,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:02:33,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:33,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:33,851 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:33,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:02:33,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:33,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 17:02:33,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:33,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:02:33,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:02:33,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:02:33,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:02:33,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 17:02:33,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:33,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:33,884 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:33,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:02:33,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:33,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-24 17:02:33,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:33,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:02:33,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 17:02:33,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 17:02:33,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:02:33,918 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 17:02:33,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [47694877] [2020-09-24 17:02:33,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:02:33,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 17:02:33,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371016370] [2020-09-24 17:02:33,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 17:02:33,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:02:33,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 17:02:33,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 17:02:33,950 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 5 states. [2020-09-24 17:02:34,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:02:34,074 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2020-09-24 17:02:34,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 17:02:34,078 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-09-24 17:02:34,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:02:34,090 INFO L225 Difference]: With dead ends: 44 [2020-09-24 17:02:34,090 INFO L226 Difference]: Without dead ends: 28 [2020-09-24 17:02:34,095 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 17:02:34,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-09-24 17:02:34,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-09-24 17:02:34,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-24 17:02:34,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-09-24 17:02:34,146 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 16 [2020-09-24 17:02:34,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:02:34,147 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-09-24 17:02:34,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 17:02:34,147 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-09-24 17:02:34,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-24 17:02:34,149 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:02:34,150 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 17:02:34,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 17:02:34,150 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:02:34,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:02:34,151 INFO L82 PathProgramCache]: Analyzing trace with hash -389703589, now seen corresponding path program 1 times [2020-09-24 17:02:34,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:02:34,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1315640684] [2020-09-24 17:02:34,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:02:34,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:34,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:34,279 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:34,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-24 17:02:34,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:34,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 115 [2020-09-24 17:02:34,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:34,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:02:34,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 17:02:34,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 17:02:34,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 17:02:34,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:02:34,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:34,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:34,332 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:34,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:02:34,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:34,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 17:02:34,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:34,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:02:34,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:02:34,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:02:34,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:02:34,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 17:02:34,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:34,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:34,380 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:34,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 17:02:34,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:34,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-09-24 17:02:34,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:34,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:02:34,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 17:02:34,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 17:02:34,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:02:34,414 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 17:02:34,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1315640684] [2020-09-24 17:02:34,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:02:34,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 17:02:34,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648829435] [2020-09-24 17:02:34,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 17:02:34,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:02:34,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 17:02:34,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 17:02:34,419 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2020-09-24 17:02:34,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:02:34,490 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2020-09-24 17:02:34,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 17:02:34,491 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-09-24 17:02:34,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:02:34,493 INFO L225 Difference]: With dead ends: 36 [2020-09-24 17:02:34,493 INFO L226 Difference]: Without dead ends: 30 [2020-09-24 17:02:34,494 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 17:02:34,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-24 17:02:34,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-09-24 17:02:34,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-24 17:02:34,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-09-24 17:02:34,503 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 17 [2020-09-24 17:02:34,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:02:34,504 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-09-24 17:02:34,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 17:02:34,504 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-09-24 17:02:34,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-24 17:02:34,506 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:02:34,506 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 17:02:34,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 17:02:34,506 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:02:34,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:02:34,507 INFO L82 PathProgramCache]: Analyzing trace with hash 50309368, now seen corresponding path program 1 times [2020-09-24 17:02:34,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:02:34,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [790805695] [2020-09-24 17:02:34,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:02:34,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:34,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:34,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:34,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:35,088 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:35,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-24 17:02:35,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 17:02:35,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 566 [2020-09-24 17:02:35,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:35,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 17:02:35,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 17:02:35,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-24 17:02:35,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:02:35,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:02:35,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:35,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:35,107 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:35,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:02:35,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:35,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 17:02:35,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:35,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:02:35,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:02:35,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:02:35,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:02:35,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 17:02:35,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:35,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:35,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:35,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:35,363 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:35,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-24 17:02:35,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 17:02:35,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 244 [2020-09-24 17:02:35,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:35,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 17:02:35,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 17:02:35,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 17:02:35,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:02:35,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 17:02:35,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:35,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:35,403 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:35,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:02:35,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:35,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 17:02:35,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:35,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:02:35,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 17:02:35,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 17:02:35,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:02:35,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-24 17:02:35,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:35,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:35,439 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:35,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:02:35,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:35,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 17:02:35,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:35,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:02:35,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-24 17:02:35,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:02:35,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:02:35,446 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 17:02:35,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [790805695] [2020-09-24 17:02:35,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:02:35,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 17:02:35,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407867826] [2020-09-24 17:02:35,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 17:02:35,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:02:35,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 17:02:35,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-24 17:02:35,450 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 7 states. [2020-09-24 17:02:35,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:02:35,558 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2020-09-24 17:02:35,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 17:02:35,558 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-09-24 17:02:35,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:02:35,560 INFO L225 Difference]: With dead ends: 52 [2020-09-24 17:02:35,560 INFO L226 Difference]: Without dead ends: 30 [2020-09-24 17:02:35,561 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 17:02:35,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-24 17:02:35,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-09-24 17:02:35,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-24 17:02:35,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-09-24 17:02:35,570 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 33 [2020-09-24 17:02:35,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:02:35,571 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-09-24 17:02:35,571 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 17:02:35,571 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-09-24 17:02:35,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-24 17:02:35,573 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:02:35,573 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 17:02:35,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 17:02:35,573 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:02:35,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:02:35,574 INFO L82 PathProgramCache]: Analyzing trace with hash -643371531, now seen corresponding path program 1 times [2020-09-24 17:02:35,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:02:35,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1417268555] [2020-09-24 17:02:35,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:02:35,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:35,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:35,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:36,017 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:36,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-24 17:02:36,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:02:36,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 431 [2020-09-24 17:02:36,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:36,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 17:02:36,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 17:02:36,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-24 17:02:36,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:02:36,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:02:36,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:36,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:36,049 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:36,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:02:36,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:36,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 17:02:36,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:36,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:02:36,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:02:36,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:02:36,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:02:36,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 17:02:36,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:36,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:36,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:36,450 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:36,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-24 17:02:36,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:02:36,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 380 [2020-09-24 17:02:36,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:36,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 17:02:36,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 17:02:36,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-24 17:02:36,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:02:36,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 17:02:36,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:36,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:36,513 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:36,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 17:02:36,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:36,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-24 17:02:36,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:36,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:02:36,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:02:36,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 17:02:36,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:02:36,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 17:02:36,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:36,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:36,529 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:36,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:02:36,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:36,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 17:02:36,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:36,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 17:02:36,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:02:36,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 17:02:36,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:02:36,555 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 17:02:36,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1417268555] [2020-09-24 17:02:36,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:02:36,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 17:02:36,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70780295] [2020-09-24 17:02:36,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 17:02:36,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:02:36,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 17:02:36,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-24 17:02:36,559 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 7 states. [2020-09-24 17:02:36,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:02:36,646 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2020-09-24 17:02:36,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 17:02:36,648 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2020-09-24 17:02:36,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:02:36,651 INFO L225 Difference]: With dead ends: 42 [2020-09-24 17:02:36,652 INFO L226 Difference]: Without dead ends: 36 [2020-09-24 17:02:36,652 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 17:02:36,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-09-24 17:02:36,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-09-24 17:02:36,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-24 17:02:36,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-09-24 17:02:36,667 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 34 [2020-09-24 17:02:36,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:02:36,668 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-09-24 17:02:36,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 17:02:36,670 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-09-24 17:02:36,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-24 17:02:36,671 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:02:36,672 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 17:02:36,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 17:02:36,672 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:02:36,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:02:36,672 INFO L82 PathProgramCache]: Analyzing trace with hash 765810174, now seen corresponding path program 1 times [2020-09-24 17:02:36,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:02:36,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [440980691] [2020-09-24 17:02:36,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:02:36,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:36,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:36,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:36,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:36,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:37,240 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:37,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-09-24 17:02:37,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 17:02:37,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 556 [2020-09-24 17:02:37,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:37,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 17:02:37,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 17:02:37,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-24 17:02:37,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 17:02:37,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:02:37,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:37,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:37,258 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:37,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:02:37,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:37,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 17:02:37,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:37,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:02:37,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:02:37,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:02:37,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:02:37,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 17:02:37,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:37,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:37,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:37,392 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:37,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-24 17:02:37,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:02:37,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-09-24 17:02:37,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:37,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 17:02:37,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-24 17:02:37,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-24 17:02:37,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:02:37,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 17:02:37,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:37,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:37,427 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:37,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 17:02:37,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:37,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-24 17:02:37,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:37,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:02:37,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:02:37,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 17:02:37,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:02:37,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 17:02:37,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:37,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:37,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:37,494 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:37,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 17:02:37,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:02:37,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-09-24 17:02:37,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:37,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:02:37,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 17:02:37,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 17:02:37,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:02:37,512 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 17:02:37,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [440980691] [2020-09-24 17:02:37,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:02:37,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 17:02:37,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930262835] [2020-09-24 17:02:37,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 17:02:37,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:02:37,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 17:02:37,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-24 17:02:37,516 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 6 states. [2020-09-24 17:02:37,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:02:37,638 INFO L93 Difference]: Finished difference Result 72 states and 93 transitions. [2020-09-24 17:02:37,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 17:02:37,641 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2020-09-24 17:02:37,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:02:37,645 INFO L225 Difference]: With dead ends: 72 [2020-09-24 17:02:37,645 INFO L226 Difference]: Without dead ends: 44 [2020-09-24 17:02:37,647 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 17:02:37,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-24 17:02:37,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2020-09-24 17:02:37,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-24 17:02:37,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-09-24 17:02:37,661 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 35 [2020-09-24 17:02:37,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:02:37,665 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-09-24 17:02:37,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 17:02:37,666 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-09-24 17:02:37,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-24 17:02:37,668 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:02:37,668 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 17:02:37,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 17:02:37,668 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:02:37,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:02:37,670 INFO L82 PathProgramCache]: Analyzing trace with hash 99184320, now seen corresponding path program 2 times [2020-09-24 17:02:37,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:02:37,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1958255432] [2020-09-24 17:02:37,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:02:37,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:37,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:37,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:37,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:39,835 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:39,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-24 17:02:39,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 17:02:39,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2148 [2020-09-24 17:02:39,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:39,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 17:02:39,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 17:02:39,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-24 17:02:39,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:02:39,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:02:39,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:39,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:39,855 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:39,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:02:39,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:39,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 17:02:39,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:39,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:02:39,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:02:39,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:02:39,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:02:39,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 17:02:39,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:39,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:39,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:39,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:41,988 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:41,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-24 17:02:41,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 17:02:41,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2119 [2020-09-24 17:02:41,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:41,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 17:02:41,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 17:02:41,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-09-24 17:02:41,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:02:42,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 17:02:42,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:42,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:42,080 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:42,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-24 17:02:42,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:42,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-09-24 17:02:42,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:42,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:02:42,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:02:42,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-24 17:02:42,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:02:42,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 17:02:42,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:42,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:42,096 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:42,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 17:02:42,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:42,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 17:02:42,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:42,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:02:42,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:02:42,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:02:42,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:02:42,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 17:02:42,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:42,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:42,106 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:42,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:02:42,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:42,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 17:02:42,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:42,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:02:42,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:02:42,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:02:42,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:02:42,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 17:02:42,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:42,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:42,136 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:42,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 17:02:42,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:42,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-24 17:02:42,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:42,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 17:02:42,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:02:42,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 17:02:42,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:02:42,166 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 17:02:42,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1958255432] [2020-09-24 17:02:42,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:02:42,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 17:02:42,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947708022] [2020-09-24 17:02:42,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 17:02:42,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:02:42,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 17:02:42,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-24 17:02:42,169 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 7 states. [2020-09-24 17:02:42,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:02:42,299 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-09-24 17:02:42,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 17:02:42,300 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 52 [2020-09-24 17:02:42,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:02:42,301 INFO L225 Difference]: With dead ends: 50 [2020-09-24 17:02:42,301 INFO L226 Difference]: Without dead ends: 44 [2020-09-24 17:02:42,302 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 17:02:42,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-24 17:02:42,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2020-09-24 17:02:42,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-24 17:02:42,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-09-24 17:02:42,310 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 52 [2020-09-24 17:02:42,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:02:42,311 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-09-24 17:02:42,311 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 17:02:42,311 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-09-24 17:02:42,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-09-24 17:02:42,314 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:02:42,314 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 17:02:42,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 17:02:42,315 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:02:42,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:02:42,316 INFO L82 PathProgramCache]: Analyzing trace with hash 501566307, now seen corresponding path program 3 times [2020-09-24 17:02:42,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:02:42,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395250603] [2020-09-24 17:02:42,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:02:42,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:42,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:42,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:42,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:42,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:42,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:42,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:42,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:42,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:45,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:45,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:49,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:49,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:49,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:49,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:03:02,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:03:02,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:03:02,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:03:03,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:03:04,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:03:20,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking...