/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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 SequenceOfStatements --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 enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-fpi/res1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:40:30,554 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:40:30,559 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:40:30,619 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:40:30,620 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:40:30,627 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:40:30,630 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:40:30,635 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:40:30,638 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:40:30,644 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:40:30,646 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:40:30,648 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:40:30,648 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:40:30,652 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:40:30,654 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:40:30,656 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:40:30,657 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:40:30,661 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:40:30,682 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:40:30,692 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:40:30,694 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:40:30,696 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:40:30,698 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:40:30,701 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:40:30,710 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:40:30,711 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:40:30,711 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:40:30,714 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:40:30,715 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:40:30,716 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:40:30,716 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:40:30,717 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:40:30,719 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:40:30,720 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:40:30,721 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:40:30,722 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:40:30,722 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:40:30,723 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:40:30,723 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:40:30,724 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:40:30,725 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:40:30,733 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 [2020-10-26 19:40:30,785 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:40:30,785 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:40:30,790 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:40:30,790 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:40:30,790 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:40:30,790 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:40:30,791 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:40:30,791 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:40:30,791 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:40:30,791 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:40:30,792 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:40:30,793 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:40:30,793 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:40:30,793 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:40:30,793 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:40:30,793 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:40:30,794 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:40:30,794 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:40:30,794 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:40:30,794 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:40:30,794 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:40:30,794 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:40:30,795 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:40:30,795 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:40:30,795 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:40:30,795 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:40:30,795 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:40:30,796 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:40:30,796 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:40:30,796 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:40:31,240 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:40:31,268 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:40:31,271 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:40:31,273 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:40:31,274 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:40:31,275 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/res1.c [2020-10-26 19:40:31,374 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/879665347/0837fde363464c5ca090bad9d552f787/FLAG3bf764cb2 [2020-10-26 19:40:32,131 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:40:32,132 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/res1.c [2020-10-26 19:40:32,146 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/879665347/0837fde363464c5ca090bad9d552f787/FLAG3bf764cb2 [2020-10-26 19:40:32,446 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/879665347/0837fde363464c5ca090bad9d552f787 [2020-10-26 19:40:32,451 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:40:32,460 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:40:32,466 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:40:32,466 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:40:32,470 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:40:32,471 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:40:32" (1/1) ... [2020-10-26 19:40:32,476 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1240fbe6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:40:32, skipping insertion in model container [2020-10-26 19:40:32,476 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:40:32" (1/1) ... [2020-10-26 19:40:32,485 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:40:32,507 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:40:32,695 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:40:32,704 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:40:32,738 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:40:32,762 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:40:32,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:40:32 WrapperNode [2020-10-26 19:40:32,763 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:40:32,764 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:40:32,765 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:40:32,765 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:40:32,777 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:40:32" (1/1) ... [2020-10-26 19:40:32,778 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:40:32" (1/1) ... [2020-10-26 19:40:32,787 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:40:32" (1/1) ... [2020-10-26 19:40:32,787 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:40:32" (1/1) ... [2020-10-26 19:40:32,797 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:40:32" (1/1) ... [2020-10-26 19:40:32,802 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:40:32" (1/1) ... [2020-10-26 19:40:32,804 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:40:32" (1/1) ... [2020-10-26 19:40:32,807 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:40:32,808 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:40:32,808 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:40:32,808 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:40:32,809 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:40:32" (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 [2020-10-26 19:40:32,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:40:32,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:40:32,882 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:40:32,882 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-26 19:40:32,882 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:40:32,883 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:40:32,883 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:40:32,883 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:40:32,883 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:40:32,883 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:40:32,883 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-26 19:40:32,884 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:40:32,884 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 19:40:32,884 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-26 19:40:32,884 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:40:32,884 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-26 19:40:32,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:40:32,885 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:40:32,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:40:32,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:40:32,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:40:32,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:40:33,508 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:40:33,508 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-26 19:40:33,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:40:33 BoogieIcfgContainer [2020-10-26 19:40:33,511 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:40:33,514 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:40:33,514 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:40:33,518 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:40:33,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:40:32" (1/3) ... [2020-10-26 19:40:33,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50c5376b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:40:33, skipping insertion in model container [2020-10-26 19:40:33,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:40:32" (2/3) ... [2020-10-26 19:40:33,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50c5376b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:40:33, skipping insertion in model container [2020-10-26 19:40:33,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:40:33" (3/3) ... [2020-10-26 19:40:33,523 INFO L111 eAbstractionObserver]: Analyzing ICFG res1.c [2020-10-26 19:40:33,536 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:40:33,542 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:40:33,559 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:40:33,605 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:40:33,606 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:40:33,606 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:40:33,606 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:40:33,606 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:40:33,606 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:40:33,606 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:40:33,606 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:40:33,627 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-10-26 19:40:33,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-26 19:40:33,646 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:40:33,647 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:40:33,648 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:40:33,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:40:33,657 INFO L82 PathProgramCache]: Analyzing trace with hash -181434534, now seen corresponding path program 1 times [2020-10-26 19:40:33,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:40:33,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [312132107] [2020-10-26 19:40:33,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:40:33,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:33,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:33,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:34,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:34,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:34,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:34,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:36,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:36,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-26 19:40:36,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:40:36,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3023 [2020-10-26 19:40:36,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:36,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:40:36,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:40:36,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:40:36,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:40:36,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:40:36,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:36,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:37,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:37,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:40:37,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:37,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 19:40:37,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:37,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:37,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:37,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:37,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:40:37,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:40:37,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:37,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:37,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:37,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:37,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:40:37,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:40:37,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 19:40:37,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:37,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:40:37,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:37,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:40:37,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:37,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:40:37,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [312132107] [2020-10-26 19:40:37,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:40:37,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-26 19:40:37,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859125128] [2020-10-26 19:40:37,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:40:37,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:40:37,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:40:37,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:40:37,084 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 5 states. [2020-10-26 19:40:37,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:40:37,426 INFO L93 Difference]: Finished difference Result 77 states and 104 transitions. [2020-10-26 19:40:37,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:40:37,430 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-10-26 19:40:37,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:40:37,440 INFO L225 Difference]: With dead ends: 77 [2020-10-26 19:40:37,440 INFO L226 Difference]: Without dead ends: 35 [2020-10-26 19:40:37,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:40:37,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-26 19:40:37,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-26 19:40:37,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-26 19:40:37,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2020-10-26 19:40:37,514 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 26 [2020-10-26 19:40:37,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:40:37,515 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2020-10-26 19:40:37,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:40:37,515 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2020-10-26 19:40:37,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-26 19:40:37,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:40:37,517 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:40:37,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:40:37,518 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:40:37,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:40:37,520 INFO L82 PathProgramCache]: Analyzing trace with hash -697842092, now seen corresponding path program 1 times [2020-10-26 19:40:37,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:40:37,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [513475621] [2020-10-26 19:40:37,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:40:37,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:37,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:37,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:37,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:38,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:38,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:38,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:39,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:39,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:40,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:41,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:41,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:42,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:42,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:42,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:42,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-26 19:40:42,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-26 19:40:42,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-26 19:40:42,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:42,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:40:42,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:40:42,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:40:42,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:43,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:40:43,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:43,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:43,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:43,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:40:43,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:43,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:40:43,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:43,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:43,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:43,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:43,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:43,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:40:43,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:43,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:43,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:43,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:40:43,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:43,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:40:43,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:43,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:43,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:43,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:43,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:43,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:40:43,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [513475621] [2020-10-26 19:40:43,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:40:43,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:40:43,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106507770] [2020-10-26 19:40:43,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:40:43,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:40:43,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:40:43,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:40:43,393 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 17 states. [2020-10-26 19:40:44,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:40:44,549 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2020-10-26 19:40:44,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:40:44,551 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 34 [2020-10-26 19:40:44,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:40:44,554 INFO L225 Difference]: With dead ends: 59 [2020-10-26 19:40:44,554 INFO L226 Difference]: Without dead ends: 52 [2020-10-26 19:40:44,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=155, Invalid=715, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:40:44,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-26 19:40:44,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 44. [2020-10-26 19:40:44,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-26 19:40:44,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2020-10-26 19:40:44,582 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 34 [2020-10-26 19:40:44,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:40:44,583 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2020-10-26 19:40:44,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:40:44,585 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2020-10-26 19:40:44,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-26 19:40:44,586 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:40:44,587 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:40:44,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:40:44,587 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:40:44,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:40:44,588 INFO L82 PathProgramCache]: Analyzing trace with hash 583184370, now seen corresponding path program 2 times [2020-10-26 19:40:44,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:40:44,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [32121444] [2020-10-26 19:40:44,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:40:44,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:44,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:44,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:44,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:47,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:47,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-26 19:40:47,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:40:47,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3106 [2020-10-26 19:40:47,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:47,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:40:47,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:40:47,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:40:47,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:47,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:40:47,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:47,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:47,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:47,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:40:47,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:47,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:40:47,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:47,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:47,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:47,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:47,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:47,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:40:47,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:47,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:47,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:47,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:40:47,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:47,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:40:47,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:47,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:47,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:47,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:47,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:40:47,874 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:40:47,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [32121444] [2020-10-26 19:40:47,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:40:47,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:40:47,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815253676] [2020-10-26 19:40:47,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:40:47,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:40:47,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:40:47,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:40:47,883 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 8 states. [2020-10-26 19:40:48,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:40:48,201 INFO L93 Difference]: Finished difference Result 87 states and 98 transitions. [2020-10-26 19:40:48,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:40:48,201 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-10-26 19:40:48,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:40:48,203 INFO L225 Difference]: With dead ends: 87 [2020-10-26 19:40:48,203 INFO L226 Difference]: Without dead ends: 58 [2020-10-26 19:40:48,204 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:40:48,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-26 19:40:48,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-10-26 19:40:48,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-26 19:40:48,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-10-26 19:40:48,214 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 36 [2020-10-26 19:40:48,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:40:48,215 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-10-26 19:40:48,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:40:48,215 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-10-26 19:40:48,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-26 19:40:48,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:40:48,217 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:40:48,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:40:48,217 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:40:48,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:40:48,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1643029680, now seen corresponding path program 3 times [2020-10-26 19:40:48,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:40:48,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [423701869] [2020-10-26 19:40:48,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:40:48,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:48,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:48,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:48,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:48,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:49,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:49,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:50,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:50,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:51,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:52,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:53,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:53,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-26 19:40:53,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-26 19:40:53,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:40:53,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:53,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:40:53,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:40:53,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:40:53,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:40:54,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:40:54,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:54,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:54,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:54,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:40:54,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:54,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:40:54,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:54,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:54,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:54,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:54,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 19:40:54,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:40:54,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:54,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:54,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:40:54,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:40:54,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:40:54,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:40:54,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:40:54,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:40:54,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:40:54,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:40:54,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:40:54,202 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:40:54,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [423701869] [2020-10-26 19:40:54,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:40:54,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:40:54,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115278395] [2020-10-26 19:40:54,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:40:54,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:40:54,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:40:54,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:40:54,205 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 20 states. [2020-10-26 19:40:55,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:40:55,912 INFO L93 Difference]: Finished difference Result 72 states and 79 transitions. [2020-10-26 19:40:55,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 19:40:55,912 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2020-10-26 19:40:55,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:40:55,914 INFO L225 Difference]: With dead ends: 72 [2020-10-26 19:40:55,914 INFO L226 Difference]: Without dead ends: 61 [2020-10-26 19:40:55,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=208, Invalid=914, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:40:55,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-26 19:40:55,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2020-10-26 19:40:55,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-26 19:40:55,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2020-10-26 19:40:55,927 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 38 [2020-10-26 19:40:55,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:40:55,929 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2020-10-26 19:40:55,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:40:55,930 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2020-10-26 19:40:55,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-26 19:40:55,931 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:40:55,931 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:40:55,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:40:55,931 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:40:55,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:40:55,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1955539410, now seen corresponding path program 4 times [2020-10-26 19:40:55,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:40:55,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [14016830] [2020-10-26 19:40:55,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:40:55,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:40:55,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:56,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:56,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:57,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:57,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:58,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:58,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:59,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:40:59,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:00,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:00,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:00,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:01,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:01,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-26 19:41:01,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-26 19:41:01,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5078 [2020-10-26 19:41:01,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:01,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:41:01,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:41:01,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:41:01,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:41:01,510 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 42 [2020-10-26 19:41:01,630 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2020-10-26 19:41:01,871 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 49 [2020-10-26 19:41:02,040 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2020-10-26 19:41:02,201 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 48 [2020-10-26 19:41:02,338 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 47 [2020-10-26 19:41:02,481 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2020-10-26 19:41:02,637 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 46 [2020-10-26 19:41:02,831 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 51 [2020-10-26 19:41:03,126 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 31 [2020-10-26 19:41:03,441 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 31 [2020-10-26 19:41:03,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:41:03,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:03,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:03,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:03,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:41:03,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:41:03,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:41:03,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:03,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:41:03,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:41:03,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:41:03,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:41:03,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:41:03,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:03,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:03,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:03,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:41:03,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:41:03,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:41:03,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:03,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:41:03,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:41:03,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:41:03,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:41:03,814 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:41:03,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [14016830] [2020-10-26 19:41:03,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:41:03,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:41:03,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829755696] [2020-10-26 19:41:03,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:41:03,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:41:03,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:41:03,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:41:03,818 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand 24 states. [2020-10-26 19:41:04,208 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-10-26 19:41:04,447 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 60 [2020-10-26 19:41:04,627 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 42 [2020-10-26 19:41:04,892 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 40 [2020-10-26 19:41:05,061 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2020-10-26 19:41:05,431 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2020-10-26 19:41:05,646 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-26 19:41:06,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:41:06,315 INFO L93 Difference]: Finished difference Result 73 states and 80 transitions. [2020-10-26 19:41:06,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 19:41:06,315 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 40 [2020-10-26 19:41:06,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:41:06,317 INFO L225 Difference]: With dead ends: 73 [2020-10-26 19:41:06,317 INFO L226 Difference]: Without dead ends: 66 [2020-10-26 19:41:06,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=256, Invalid=1226, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:41:06,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-26 19:41:06,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2020-10-26 19:41:06,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-26 19:41:06,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2020-10-26 19:41:06,332 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 40 [2020-10-26 19:41:06,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:41:06,332 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2020-10-26 19:41:06,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:41:06,332 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2020-10-26 19:41:06,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-26 19:41:06,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:41:06,334 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:41:06,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:41:06,334 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:41:06,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:41:06,335 INFO L82 PathProgramCache]: Analyzing trace with hash -628676946, now seen corresponding path program 5 times [2020-10-26 19:41:06,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:41:06,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1434020974] [2020-10-26 19:41:06,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:41:06,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:06,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:06,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:06,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:06,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:06,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:07,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:07,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:11,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:11,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-26 19:41:11,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:41:11,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:41:11,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:11,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:41:11,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:41:11,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:41:11,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:41:11,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:41:11,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:11,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:11,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:11,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:41:11,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:41:11,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:41:11,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:11,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:41:11,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:41:11,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:41:11,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:41:11,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:41:11,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:11,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:11,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:11,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:41:11,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:41:11,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 19:41:11,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:11,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:41:11,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:41:11,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:41:11,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:41:11,493 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 19:41:11,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1434020974] [2020-10-26 19:41:11,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:41:11,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:41:11,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034336893] [2020-10-26 19:41:11,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:41:11,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:41:11,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:41:11,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:41:11,499 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand 9 states. [2020-10-26 19:41:11,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:41:11,978 INFO L93 Difference]: Finished difference Result 96 states and 105 transitions. [2020-10-26 19:41:11,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:41:11,979 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 40 [2020-10-26 19:41:11,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:41:11,981 INFO L225 Difference]: With dead ends: 96 [2020-10-26 19:41:11,981 INFO L226 Difference]: Without dead ends: 85 [2020-10-26 19:41:11,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:41:11,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-26 19:41:11,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 43. [2020-10-26 19:41:11,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-26 19:41:11,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2020-10-26 19:41:11,995 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 40 [2020-10-26 19:41:11,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:41:11,995 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2020-10-26 19:41:11,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:41:11,995 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2020-10-26 19:41:11,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-26 19:41:11,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:41:11,996 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:41:11,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:41:11,997 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:41:11,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:41:11,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1178128052, now seen corresponding path program 6 times [2020-10-26 19:41:11,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:41:11,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1845964483] [2020-10-26 19:41:11,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:41:12,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:12,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:12,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:12,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:13,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:13,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:14,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:14,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:15,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:15,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:16,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:17,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:17,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-26 19:41:17,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-26 19:41:17,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:41:17,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:17,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:41:17,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:41:17,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:41:17,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:41:18,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:41:18,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:18,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:18,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:18,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:41:18,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:41:18,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:41:18,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:18,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:41:18,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:41:18,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:41:18,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:41:18,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:41:18,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:18,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:18,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:18,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:41:18,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:41:18,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:41:18,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:18,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:41:18,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:41:18,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:41:18,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:41:19,003 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:41:19,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1845964483] [2020-10-26 19:41:19,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:41:19,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:41:19,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542111359] [2020-10-26 19:41:19,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:41:19,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:41:19,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:41:19,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:41:19,006 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 27 states. [2020-10-26 19:41:19,713 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 58 [2020-10-26 19:41:19,880 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2020-10-26 19:41:20,110 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2020-10-26 19:41:20,292 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2020-10-26 19:41:20,485 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 47 [2020-10-26 19:41:20,694 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 51 [2020-10-26 19:41:20,914 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 52 [2020-10-26 19:41:21,168 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 55 [2020-10-26 19:41:21,318 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 45 [2020-10-26 19:41:22,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:41:22,377 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2020-10-26 19:41:22,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 19:41:22,378 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 42 [2020-10-26 19:41:22,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:41:22,379 INFO L225 Difference]: With dead ends: 59 [2020-10-26 19:41:22,380 INFO L226 Difference]: Without dead ends: 52 [2020-10-26 19:41:22,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=382, Invalid=1874, Unknown=0, NotChecked=0, Total=2256 [2020-10-26 19:41:22,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-26 19:41:22,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2020-10-26 19:41:22,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-26 19:41:22,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-10-26 19:41:22,392 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 42 [2020-10-26 19:41:22,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:41:22,393 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-10-26 19:41:22,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:41:22,393 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-10-26 19:41:22,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-26 19:41:22,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:41:22,394 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:41:22,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:41:22,394 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:41:22,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:41:22,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1410122518, now seen corresponding path program 7 times [2020-10-26 19:41:22,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:41:22,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1335106368] [2020-10-26 19:41:22,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:41:22,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:22,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:22,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:22,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:27,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:27,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-26 19:41:27,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:41:27,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:41:27,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:27,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:41:27,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:41:27,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:41:27,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:41:27,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:41:27,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:27,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:27,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:27,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:41:27,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:41:27,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:41:27,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:27,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:41:27,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:41:27,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:41:27,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:41:27,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:41:27,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:27,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:27,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:27,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:41:27,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:41:27,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:41:27,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:27,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:41:27,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:41:27,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:41:27,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:41:27,587 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-26 19:41:27,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1335106368] [2020-10-26 19:41:27,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:41:27,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:41:27,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059576334] [2020-10-26 19:41:27,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:41:27,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:41:27,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:41:27,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:41:27,596 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 10 states. [2020-10-26 19:41:28,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:41:28,003 INFO L93 Difference]: Finished difference Result 106 states and 117 transitions. [2020-10-26 19:41:28,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:41:28,004 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 44 [2020-10-26 19:41:28,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:41:28,005 INFO L225 Difference]: With dead ends: 106 [2020-10-26 19:41:28,005 INFO L226 Difference]: Without dead ends: 62 [2020-10-26 19:41:28,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:41:28,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-26 19:41:28,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 49. [2020-10-26 19:41:28,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-26 19:41:28,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2020-10-26 19:41:28,037 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 44 [2020-10-26 19:41:28,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:41:28,037 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2020-10-26 19:41:28,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:41:28,037 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2020-10-26 19:41:28,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-26 19:41:28,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:41:28,039 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1] [2020-10-26 19:41:28,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:41:28,042 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:41:28,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:41:28,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1239709914, now seen corresponding path program 8 times [2020-10-26 19:41:28,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:41:28,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [579398538] [2020-10-26 19:41:28,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:41:28,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:28,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:28,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:28,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:33,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:33,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-26 19:41:33,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:41:33,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 19:41:33,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:33,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:41:33,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:41:33,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:41:33,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:41:33,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:41:33,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:33,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:33,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:33,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:41:33,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:41:33,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:41:33,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:33,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:41:33,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:41:33,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:41:33,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:41:33,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:41:33,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:33,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:33,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:33,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:41:33,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:41:33,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:41:33,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:33,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:41:33,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:41:33,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:41:33,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:41:33,240 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-26 19:41:33,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [579398538] [2020-10-26 19:41:33,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:41:33,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:41:33,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140539979] [2020-10-26 19:41:33,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:41:33,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:41:33,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:41:33,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:41:33,242 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 10 states. [2020-10-26 19:41:33,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:41:33,632 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2020-10-26 19:41:33,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:41:33,632 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 48 [2020-10-26 19:41:33,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:41:33,633 INFO L225 Difference]: With dead ends: 58 [2020-10-26 19:41:33,633 INFO L226 Difference]: Without dead ends: 51 [2020-10-26 19:41:33,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:41:33,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-26 19:41:33,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-26 19:41:33,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-26 19:41:33,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2020-10-26 19:41:33,658 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 48 [2020-10-26 19:41:33,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:41:33,658 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2020-10-26 19:41:33,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:41:33,659 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2020-10-26 19:41:33,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-26 19:41:33,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:41:33,660 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:41:33,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:41:33,663 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:41:33,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:41:33,664 INFO L82 PathProgramCache]: Analyzing trace with hash -460749756, now seen corresponding path program 9 times [2020-10-26 19:41:33,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:41:33,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [290360827] [2020-10-26 19:41:33,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:41:33,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:33,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:34,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:34,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:35,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:36,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:36,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:37,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:38,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:38,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:38,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-26 19:41:38,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 19:41:38,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 19:41:38,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:38,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:41:38,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:41:38,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:41:38,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:41:39,274 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-10-26 19:41:39,554 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2020-10-26 19:41:39,728 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2020-10-26 19:41:39,897 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2020-10-26 19:41:40,067 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2020-10-26 19:41:40,258 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2020-10-26 19:41:40,400 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2020-10-26 19:41:40,568 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2020-10-26 19:41:40,763 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 64 [2020-10-26 19:41:41,124 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 55 [2020-10-26 19:41:41,279 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 40 [2020-10-26 19:41:41,434 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2020-10-26 19:41:42,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:41:42,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:42,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:42,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:42,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:41:42,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:41:42,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:41:42,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:42,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:41:42,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:41:42,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:41:42,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:41:42,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:41:42,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:42,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:42,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:42,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:41:42,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:41:42,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:41:42,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:42,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:41:42,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:41:42,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:41:42,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:41:42,527 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:41:42,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [290360827] [2020-10-26 19:41:42,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:41:42,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-26 19:41:42,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249122919] [2020-10-26 19:41:42,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-26 19:41:42,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:41:42,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-26 19:41:42,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=917, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:41:42,531 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand 33 states. [2020-10-26 19:41:43,540 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2020-10-26 19:41:44,003 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 69 [2020-10-26 19:41:44,444 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 55 [2020-10-26 19:41:44,682 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 54 [2020-10-26 19:41:44,922 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 53 [2020-10-26 19:41:45,148 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 54 [2020-10-26 19:41:45,441 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 59 [2020-10-26 19:41:45,637 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 57 [2020-10-26 19:41:45,858 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2020-10-26 19:41:46,347 WARN L193 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 95 [2020-10-26 19:41:46,659 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 63 [2020-10-26 19:41:46,895 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2020-10-26 19:41:47,255 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 81 [2020-10-26 19:41:47,456 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 56 [2020-10-26 19:41:47,973 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 84 [2020-10-26 19:41:48,329 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2020-10-26 19:41:49,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:41:49,344 INFO L93 Difference]: Finished difference Result 78 states and 83 transitions. [2020-10-26 19:41:49,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-26 19:41:49,345 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 50 [2020-10-26 19:41:49,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:41:49,346 INFO L225 Difference]: With dead ends: 78 [2020-10-26 19:41:49,346 INFO L226 Difference]: Without dead ends: 71 [2020-10-26 19:41:49,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1024 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=549, Invalid=3483, Unknown=0, NotChecked=0, Total=4032 [2020-10-26 19:41:49,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-26 19:41:49,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 64. [2020-10-26 19:41:49,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-26 19:41:49,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2020-10-26 19:41:49,362 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 50 [2020-10-26 19:41:49,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:41:49,363 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2020-10-26 19:41:49,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-26 19:41:49,363 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2020-10-26 19:41:49,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-26 19:41:49,364 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:41:49,364 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:41:49,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:41:49,364 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:41:49,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:41:49,365 INFO L82 PathProgramCache]: Analyzing trace with hash 795652578, now seen corresponding path program 10 times [2020-10-26 19:41:49,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:41:49,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45852480] [2020-10-26 19:41:49,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:41:49,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:49,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:49,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:49,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:54,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:54,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-26 19:41:54,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:41:54,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:41:54,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:54,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:41:54,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:41:54,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:41:54,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:41:54,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:41:54,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:54,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:54,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:54,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:41:54,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:41:54,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:41:54,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:54,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:41:54,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:41:54,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:41:54,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:41:54,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:41:54,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:54,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:54,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:41:54,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:41:54,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:41:54,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:41:54,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:41:54,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:41:54,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:41:54,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:41:54,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:41:54,538 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-26 19:41:54,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45852480] [2020-10-26 19:41:54,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:41:54,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:41:54,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392428456] [2020-10-26 19:41:54,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:41:54,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:41:54,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:41:54,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:41:54,540 INFO L87 Difference]: Start difference. First operand 64 states and 69 transitions. Second operand 12 states. [2020-10-26 19:41:55,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:41:55,043 INFO L93 Difference]: Finished difference Result 127 states and 138 transitions. [2020-10-26 19:41:55,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:41:55,044 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 52 [2020-10-26 19:41:55,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:41:55,045 INFO L225 Difference]: With dead ends: 127 [2020-10-26 19:41:55,045 INFO L226 Difference]: Without dead ends: 78 [2020-10-26 19:41:55,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:41:55,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-26 19:41:55,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 65. [2020-10-26 19:41:55,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-26 19:41:55,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2020-10-26 19:41:55,061 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 52 [2020-10-26 19:41:55,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:41:55,062 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2020-10-26 19:41:55,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:41:55,062 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2020-10-26 19:41:55,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-26 19:41:55,063 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:41:55,063 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:41:55,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:41:55,064 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:41:55,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:41:55,064 INFO L82 PathProgramCache]: Analyzing trace with hash -710442688, now seen corresponding path program 11 times [2020-10-26 19:41:55,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:41:55,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1454931383] [2020-10-26 19:41:55,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:41:55,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:41:55,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:55,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:55,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:56,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:59,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:41:59,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:00,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:00,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-26 19:42:00,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:42:00,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 19:42:00,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:00,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-26 19:42:00,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:42:00,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:42:00,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:00,676 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2020-10-26 19:42:01,409 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2020-10-26 19:42:01,590 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2020-10-26 19:42:01,800 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 62 [2020-10-26 19:42:02,215 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 66 [2020-10-26 19:42:02,424 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 58 [2020-10-26 19:42:02,683 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 60 [2020-10-26 19:42:02,891 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 56 [2020-10-26 19:42:03,129 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 60 [2020-10-26 19:42:03,485 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 45 [2020-10-26 19:42:03,661 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 37 [2020-10-26 19:42:03,854 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2020-10-26 19:42:04,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:42:04,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:04,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:04,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:04,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:42:04,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:04,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:42:04,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:04,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:04,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:04,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:04,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:04,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:42:04,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:04,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:04,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:04,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:42:04,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:04,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:42:04,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:04,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:04,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:04,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:04,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:04,746 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 39 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 19:42:04,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1454931383] [2020-10-26 19:42:04,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:42:04,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-26 19:42:04,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463311599] [2020-10-26 19:42:04,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-26 19:42:04,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:42:04,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-26 19:42:04,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:42:04,749 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand 34 states. [2020-10-26 19:42:05,596 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2020-10-26 19:42:05,782 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2020-10-26 19:42:06,154 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2020-10-26 19:42:06,330 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2020-10-26 19:42:06,534 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2020-10-26 19:42:06,783 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2020-10-26 19:42:07,044 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2020-10-26 19:42:07,401 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 72 [2020-10-26 19:42:07,755 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 70 [2020-10-26 19:42:08,053 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 67 [2020-10-26 19:42:08,589 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 73 [2020-10-26 19:42:08,850 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 69 [2020-10-26 19:42:09,105 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 64 [2020-10-26 19:42:09,381 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 66 [2020-10-26 19:42:09,635 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 65 [2020-10-26 19:42:09,867 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 60 [2020-10-26 19:42:10,481 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-10-26 19:42:11,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:42:11,120 INFO L93 Difference]: Finished difference Result 72 states and 75 transitions. [2020-10-26 19:42:11,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-26 19:42:11,121 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 54 [2020-10-26 19:42:11,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:42:11,122 INFO L225 Difference]: With dead ends: 72 [2020-10-26 19:42:11,122 INFO L226 Difference]: Without dead ends: 57 [2020-10-26 19:42:11,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=420, Invalid=3240, Unknown=0, NotChecked=0, Total=3660 [2020-10-26 19:42:11,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-26 19:42:11,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-26 19:42:11,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-26 19:42:11,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-10-26 19:42:11,137 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 54 [2020-10-26 19:42:11,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:42:11,137 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-10-26 19:42:11,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-26 19:42:11,137 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-10-26 19:42:11,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-26 19:42:11,139 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:42:11,139 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:42:11,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:42:11,139 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:42:11,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:42:11,140 INFO L82 PathProgramCache]: Analyzing trace with hash -72671202, now seen corresponding path program 12 times [2020-10-26 19:42:11,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:42:11,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1474029744] [2020-10-26 19:42:11,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:42:11,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:11,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:11,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:11,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:16,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:16,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-26 19:42:16,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:42:16,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-26 19:42:16,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:16,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:42:16,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:42:16,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:42:16,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:16,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:42:16,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:16,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:16,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:16,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:42:16,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:16,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:42:16,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:16,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:16,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:16,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:16,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:16,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:42:16,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:16,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:16,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:16,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:42:16,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:16,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:42:16,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:16,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:16,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:16,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:16,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:16,321 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-26 19:42:16,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1474029744] [2020-10-26 19:42:16,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:42:16,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:42:16,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650219888] [2020-10-26 19:42:16,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:42:16,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:42:16,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:42:16,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:42:16,323 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 12 states. [2020-10-26 19:42:17,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:42:17,025 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2020-10-26 19:42:17,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:42:17,025 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 56 [2020-10-26 19:42:17,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:42:17,026 INFO L225 Difference]: With dead ends: 66 [2020-10-26 19:42:17,027 INFO L226 Difference]: Without dead ends: 59 [2020-10-26 19:42:17,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:42:17,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-26 19:42:17,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-26 19:42:17,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-26 19:42:17,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2020-10-26 19:42:17,041 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 56 [2020-10-26 19:42:17,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:42:17,041 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2020-10-26 19:42:17,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:42:17,041 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2020-10-26 19:42:17,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-26 19:42:17,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:42:17,042 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:42:17,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:42:17,043 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:42:17,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:42:17,043 INFO L82 PathProgramCache]: Analyzing trace with hash 76988220, now seen corresponding path program 13 times [2020-10-26 19:42:17,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:42:17,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1669907265] [2020-10-26 19:42:17,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:42:17,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:17,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:17,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:18,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:20,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:20,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:21,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:22,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:22,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-26 19:42:22,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:42:22,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5181 [2020-10-26 19:42:22,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:22,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-26 19:42:22,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:42:22,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:42:22,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:23,177 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-10-26 19:42:23,320 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2020-10-26 19:42:23,499 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2020-10-26 19:42:23,696 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2020-10-26 19:42:23,888 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2020-10-26 19:42:24,106 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-10-26 19:42:24,368 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 64 [2020-10-26 19:42:24,634 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2020-10-26 19:42:24,854 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2020-10-26 19:42:25,201 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 72 [2020-10-26 19:42:25,497 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 65 [2020-10-26 19:42:25,864 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 75 [2020-10-26 19:42:26,149 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 63 [2020-10-26 19:42:26,424 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 65 [2020-10-26 19:42:26,659 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2020-10-26 19:42:26,913 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 60 [2020-10-26 19:42:27,118 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2020-10-26 19:42:27,328 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 43 [2020-10-26 19:42:27,673 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 46 [2020-10-26 19:42:28,057 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2020-10-26 19:42:28,469 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 42 [2020-10-26 19:42:29,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:42:29,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:29,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:29,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:29,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:42:29,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:29,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:42:29,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:29,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:29,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:29,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:29,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:29,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:42:29,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:29,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:29,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:29,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:42:29,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:29,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:42:29,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:29,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:29,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:29,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:29,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:29,268 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 9 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:42:29,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1669907265] [2020-10-26 19:42:29,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:42:29,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-26 19:42:29,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410447573] [2020-10-26 19:42:29,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-26 19:42:29,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:42:29,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-26 19:42:29,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1481, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:42:29,271 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 41 states. [2020-10-26 19:42:30,063 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2020-10-26 19:42:30,394 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 67 [2020-10-26 19:42:30,762 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 78 [2020-10-26 19:42:31,121 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 70 [2020-10-26 19:42:31,490 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2020-10-26 19:42:31,948 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 78 [2020-10-26 19:42:32,250 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2020-10-26 19:42:32,698 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 82 [2020-10-26 19:42:33,148 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 80 [2020-10-26 19:42:33,403 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 54 [2020-10-26 19:42:33,718 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 55 [2020-10-26 19:42:34,266 WARN L193 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 80 [2020-10-26 19:42:34,793 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 77 [2020-10-26 19:42:35,362 WARN L193 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 71 [2020-10-26 19:42:36,060 WARN L193 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 69 [2020-10-26 19:42:36,597 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 71 [2020-10-26 19:42:37,189 WARN L193 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 70 [2020-10-26 19:42:37,665 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 73 [2020-10-26 19:42:38,309 WARN L193 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 95 [2020-10-26 19:42:38,908 WARN L193 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 69 [2020-10-26 19:42:39,351 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 78 [2020-10-26 19:42:39,627 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 68 [2020-10-26 19:42:39,930 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 75 [2020-10-26 19:42:40,193 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 62 [2020-10-26 19:42:40,448 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 60 [2020-10-26 19:42:40,686 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2020-10-26 19:42:40,891 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 44 [2020-10-26 19:42:41,201 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2020-10-26 19:42:41,482 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 62 [2020-10-26 19:42:41,845 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 90 [2020-10-26 19:42:42,215 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 80 [2020-10-26 19:42:42,591 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-10-26 19:42:42,917 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 76 [2020-10-26 19:42:43,284 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 81 [2020-10-26 19:42:43,558 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 58 [2020-10-26 19:42:43,829 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-26 19:42:44,206 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 87 [2020-10-26 19:42:44,668 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-10-26 19:42:44,859 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-10-26 19:42:45,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:42:45,221 INFO L93 Difference]: Finished difference Result 83 states and 87 transitions. [2020-10-26 19:42:45,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-26 19:42:45,222 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 58 [2020-10-26 19:42:45,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:42:45,223 INFO L225 Difference]: With dead ends: 83 [2020-10-26 19:42:45,223 INFO L226 Difference]: Without dead ends: 65 [2020-10-26 19:42:45,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1922 ImplicationChecksByTransitivity, 20.4s TimeCoverageRelationStatistics Valid=779, Invalid=6361, Unknown=0, NotChecked=0, Total=7140 [2020-10-26 19:42:45,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-26 19:42:45,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 61. [2020-10-26 19:42:45,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-26 19:42:45,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2020-10-26 19:42:45,236 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 58 [2020-10-26 19:42:45,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:42:45,237 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2020-10-26 19:42:45,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-26 19:42:45,237 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2020-10-26 19:42:45,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-26 19:42:45,238 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:42:45,239 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:42:45,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:42:45,239 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:42:45,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:42:45,240 INFO L82 PathProgramCache]: Analyzing trace with hash 802406170, now seen corresponding path program 14 times [2020-10-26 19:42:45,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:42:45,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1411859783] [2020-10-26 19:42:45,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:42:45,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:45,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:45,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:45,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:50,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:50,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-26 19:42:50,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:42:50,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-26 19:42:50,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:50,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:42:50,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:42:50,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:42:50,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:50,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:42:50,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:50,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:50,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:50,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:42:50,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:50,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:42:50,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:50,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:50,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:50,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:50,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:50,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:42:50,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:50,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:50,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:50,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:42:50,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:50,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:42:50,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:50,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:50,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:50,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:50,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:50,498 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-26 19:42:50,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1411859783] [2020-10-26 19:42:50,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:42:50,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:42:50,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465734412] [2020-10-26 19:42:50,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:42:50,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:42:50,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:42:50,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:42:50,501 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand 14 states. [2020-10-26 19:42:51,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:42:51,137 INFO L93 Difference]: Finished difference Result 129 states and 137 transitions. [2020-10-26 19:42:51,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:42:51,138 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 60 [2020-10-26 19:42:51,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:42:51,140 INFO L225 Difference]: With dead ends: 129 [2020-10-26 19:42:51,140 INFO L226 Difference]: Without dead ends: 78 [2020-10-26 19:42:51,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:42:51,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-26 19:42:51,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 65. [2020-10-26 19:42:51,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-26 19:42:51,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2020-10-26 19:42:51,159 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 60 [2020-10-26 19:42:51,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:42:51,159 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2020-10-26 19:42:51,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:42:51,159 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2020-10-26 19:42:51,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-26 19:42:51,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:42:51,160 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:42:51,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:42:51,161 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:42:51,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:42:51,161 INFO L82 PathProgramCache]: Analyzing trace with hash -301489898, now seen corresponding path program 15 times [2020-10-26 19:42:51,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:42:51,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [782756858] [2020-10-26 19:42:51,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:42:51,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:51,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:51,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:51,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:56,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:56,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 19:42:56,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:42:56,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:42:56,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:56,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:42:56,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:42:56,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:42:56,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:56,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:42:56,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:56,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:56,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:56,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:42:56,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:56,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:42:56,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:56,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:56,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:56,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:56,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:56,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:42:56,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:56,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:56,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:42:56,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:42:56,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:42:56,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:42:56,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:42:56,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:42:56,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:42:56,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:42:56,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:42:56,402 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-10-26 19:42:56,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [782756858] [2020-10-26 19:42:56,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:42:56,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:42:56,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33049445] [2020-10-26 19:42:56,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:42:56,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:42:56,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:42:56,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:42:56,409 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand 14 states. [2020-10-26 19:42:57,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:42:57,193 INFO L93 Difference]: Finished difference Result 74 states and 77 transitions. [2020-10-26 19:42:57,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:42:57,195 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 64 [2020-10-26 19:42:57,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:42:57,196 INFO L225 Difference]: With dead ends: 74 [2020-10-26 19:42:57,196 INFO L226 Difference]: Without dead ends: 67 [2020-10-26 19:42:57,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:42:57,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-26 19:42:57,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-26 19:42:57,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-26 19:42:57,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2020-10-26 19:42:57,216 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 64 [2020-10-26 19:42:57,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:42:57,217 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2020-10-26 19:42:57,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:42:57,217 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2020-10-26 19:42:57,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-26 19:42:57,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:42:57,218 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:42:57,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:42:57,218 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:42:57,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:42:57,219 INFO L82 PathProgramCache]: Analyzing trace with hash -774446540, now seen corresponding path program 16 times [2020-10-26 19:42:57,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:42:57,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [562026779] [2020-10-26 19:42:57,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:42:57,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:42:57,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:42:58,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:00,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:02,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:02,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:02,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-26 19:43:02,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:43:02,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5470 [2020-10-26 19:43:02,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:02,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-26 19:43:02,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:43:02,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:43:02,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:03,588 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-10-26 19:43:03,720 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2020-10-26 19:43:03,852 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2020-10-26 19:43:04,137 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 50 [2020-10-26 19:43:04,300 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2020-10-26 19:43:04,496 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 51 [2020-10-26 19:43:04,724 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 51 [2020-10-26 19:43:04,936 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 59 [2020-10-26 19:43:05,155 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 59 [2020-10-26 19:43:05,411 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2020-10-26 19:43:05,626 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2020-10-26 19:43:05,875 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 60 [2020-10-26 19:43:06,063 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2020-10-26 19:43:06,388 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 64 [2020-10-26 19:43:06,597 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2020-10-26 19:43:06,931 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 65 [2020-10-26 19:43:07,156 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2020-10-26 19:43:07,492 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 62 [2020-10-26 19:43:07,725 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2020-10-26 19:43:08,076 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 62 [2020-10-26 19:43:08,303 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2020-10-26 19:43:08,544 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2020-10-26 19:43:08,964 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 48 [2020-10-26 19:43:09,398 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2020-10-26 19:43:09,842 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 40 [2020-10-26 19:43:10,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:43:10,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:10,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:10,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:10,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:43:10,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:10,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:43:10,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:10,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:43:10,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:43:10,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:43:10,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:10,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:43:10,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:10,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:10,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:10,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:43:10,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:10,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:43:10,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:10,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:43:10,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:43:10,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:43:10,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:11,031 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:43:11,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [562026779] [2020-10-26 19:43:11,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:43:11,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-26 19:43:11,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972726656] [2020-10-26 19:43:11,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-26 19:43:11,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:43:11,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-26 19:43:11,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1900, Unknown=0, NotChecked=0, Total=2070 [2020-10-26 19:43:11,034 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand 46 states. [2020-10-26 19:43:12,625 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2020-10-26 19:43:13,354 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-26 19:43:15,323 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 74 [2020-10-26 19:43:15,590 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-26 19:43:15,908 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2020-10-26 19:43:16,285 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 75 [2020-10-26 19:43:16,573 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2020-10-26 19:43:16,952 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 69 [2020-10-26 19:43:17,230 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2020-10-26 19:43:17,559 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 70 [2020-10-26 19:43:17,835 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2020-10-26 19:43:18,113 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2020-10-26 19:43:18,330 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-10-26 19:43:18,566 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-26 19:43:19,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:43:19,993 INFO L93 Difference]: Finished difference Result 90 states and 94 transitions. [2020-10-26 19:43:19,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-26 19:43:19,994 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 66 [2020-10-26 19:43:19,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:43:19,995 INFO L225 Difference]: With dead ends: 90 [2020-10-26 19:43:19,995 INFO L226 Difference]: Without dead ends: 83 [2020-10-26 19:43:19,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1878 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=572, Invalid=6738, Unknown=0, NotChecked=0, Total=7310 [2020-10-26 19:43:19,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-26 19:43:20,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 72. [2020-10-26 19:43:20,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-26 19:43:20,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2020-10-26 19:43:20,013 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 66 [2020-10-26 19:43:20,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:43:20,014 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2020-10-26 19:43:20,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-26 19:43:20,014 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2020-10-26 19:43:20,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-26 19:43:20,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:43:20,015 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:43:20,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:43:20,015 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:43:20,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:43:20,016 INFO L82 PathProgramCache]: Analyzing trace with hash -19246126, now seen corresponding path program 17 times [2020-10-26 19:43:20,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:43:20,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392040214] [2020-10-26 19:43:20,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:43:20,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:20,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:20,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:20,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:25,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:25,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-26 19:43:25,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:43:25,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-26 19:43:25,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:25,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:43:25,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:43:25,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:43:25,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:25,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:43:25,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:25,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:25,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:25,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:43:25,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:25,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:43:25,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:25,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:43:25,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:43:25,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:43:25,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:25,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:43:25,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:25,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:25,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:25,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:43:25,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:25,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:43:25,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:25,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:43:25,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:43:25,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:43:25,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:25,337 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-10-26 19:43:25,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392040214] [2020-10-26 19:43:25,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:43:25,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:43:25,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790139986] [2020-10-26 19:43:25,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:43:25,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:43:25,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:43:25,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:43:25,341 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 16 states. [2020-10-26 19:43:26,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:43:26,087 INFO L93 Difference]: Finished difference Result 160 states and 171 transitions. [2020-10-26 19:43:26,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:43:26,088 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 68 [2020-10-26 19:43:26,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:43:26,090 INFO L225 Difference]: With dead ends: 160 [2020-10-26 19:43:26,090 INFO L226 Difference]: Without dead ends: 86 [2020-10-26 19:43:26,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:43:26,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-26 19:43:26,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 73. [2020-10-26 19:43:26,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-26 19:43:26,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2020-10-26 19:43:26,105 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 68 [2020-10-26 19:43:26,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:43:26,105 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2020-10-26 19:43:26,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:43:26,105 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2020-10-26 19:43:26,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-26 19:43:26,106 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:43:26,106 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:43:26,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:43:26,106 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:43:26,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:43:26,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1457976818, now seen corresponding path program 18 times [2020-10-26 19:43:26,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:43:26,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [575463465] [2020-10-26 19:43:26,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:43:26,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:26,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:26,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:26,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:31,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:31,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-26 19:43:31,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:43:31,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-26 19:43:31,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:31,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:43:31,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:43:31,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:43:31,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:31,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:43:31,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:31,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:31,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:31,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:43:31,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:31,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:43:31,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:31,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:43:31,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:43:31,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:43:31,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:31,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:43:31,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:31,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:31,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:31,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:43:31,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:31,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:43:31,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:31,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:43:31,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:43:31,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:43:31,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:31,404 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-26 19:43:31,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [575463465] [2020-10-26 19:43:31,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:43:31,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:43:31,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445568897] [2020-10-26 19:43:31,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:43:31,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:43:31,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:43:31,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:43:31,408 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand 16 states. [2020-10-26 19:43:32,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:43:32,378 INFO L93 Difference]: Finished difference Result 82 states and 85 transitions. [2020-10-26 19:43:32,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:43:32,379 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 72 [2020-10-26 19:43:32,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:43:32,380 INFO L225 Difference]: With dead ends: 82 [2020-10-26 19:43:32,381 INFO L226 Difference]: Without dead ends: 75 [2020-10-26 19:43:32,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=169, Invalid=643, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:43:32,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-26 19:43:32,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-10-26 19:43:32,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-26 19:43:32,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2020-10-26 19:43:32,396 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 72 [2020-10-26 19:43:32,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:43:32,396 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2020-10-26 19:43:32,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:43:32,396 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2020-10-26 19:43:32,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-26 19:43:32,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:43:32,397 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:43:32,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:43:32,397 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:43:32,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:43:32,397 INFO L82 PathProgramCache]: Analyzing trace with hash 238153004, now seen corresponding path program 19 times [2020-10-26 19:43:32,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:43:32,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1581407063] [2020-10-26 19:43:32,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:43:32,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:32,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:33,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:36,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:37,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:37,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-26 19:43:37,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:43:37,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5083 [2020-10-26 19:43:37,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:37,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-26 19:43:37,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-26 19:43:37,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-26 19:43:37,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:38,119 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2020-10-26 19:43:38,242 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2020-10-26 19:43:38,392 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2020-10-26 19:43:38,531 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2020-10-26 19:43:38,703 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2020-10-26 19:43:38,871 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2020-10-26 19:43:39,066 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 48 [2020-10-26 19:43:39,256 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 48 [2020-10-26 19:43:39,467 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 52 [2020-10-26 19:43:39,706 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 55 [2020-10-26 19:43:39,935 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 61 [2020-10-26 19:43:40,135 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 53 [2020-10-26 19:43:40,431 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 63 [2020-10-26 19:43:40,791 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 63 [2020-10-26 19:43:41,103 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 64 [2020-10-26 19:43:41,408 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 64 [2020-10-26 19:43:41,765 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 67 [2020-10-26 19:43:42,098 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 67 [2020-10-26 19:43:42,456 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 72 [2020-10-26 19:43:42,826 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 72 [2020-10-26 19:43:43,185 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 73 [2020-10-26 19:43:43,529 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 73 [2020-10-26 19:43:43,929 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 77 [2020-10-26 19:43:44,303 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 73 [2020-10-26 19:43:44,758 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 88 [2020-10-26 19:43:45,158 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 84 [2020-10-26 19:43:45,605 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 84 [2020-10-26 19:43:45,986 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 75 [2020-10-26 19:43:46,427 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 84 [2020-10-26 19:43:46,810 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 77 [2020-10-26 19:43:47,222 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 74 [2020-10-26 19:43:47,585 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 69 [2020-10-26 19:43:48,000 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 70 [2020-10-26 19:43:48,321 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 61 [2020-10-26 19:43:48,707 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 72 [2020-10-26 19:43:48,900 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2020-10-26 19:43:49,128 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2020-10-26 19:43:49,334 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2020-10-26 19:43:49,536 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2020-10-26 19:43:49,751 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-10-26 19:43:49,990 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2020-10-26 19:43:50,412 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 42 [2020-10-26 19:43:50,796 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2020-10-26 19:43:51,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:43:51,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:51,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:51,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:51,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:43:51,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:51,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:43:51,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:51,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:43:51,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:43:51,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:43:51,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:51,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:43:51,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:43:51,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:43:51,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:43:51,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:43:51,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:43:51,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:43:51,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:43:51,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:43:51,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:43:51,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:43:51,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:43:51,736 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 16 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:43:51,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1581407063] [2020-10-26 19:43:51,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:43:51,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-26 19:43:51,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447829896] [2020-10-26 19:43:51,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-26 19:43:51,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:43:51,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-26 19:43:51,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=2899, Unknown=0, NotChecked=0, Total=3192 [2020-10-26 19:43:51,738 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand 57 states. [2020-10-26 19:43:52,801 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 48 [2020-10-26 19:43:52,989 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2020-10-26 19:43:53,173 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 51 [2020-10-26 19:43:53,370 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2020-10-26 19:43:53,657 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 55 [2020-10-26 19:43:53,878 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2020-10-26 19:43:54,107 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 59 [2020-10-26 19:43:54,991 WARN L193 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 99 [2020-10-26 19:43:55,391 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-10-26 19:43:55,766 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 77 [2020-10-26 19:43:56,245 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 87 [2020-10-26 19:43:56,716 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 86 [2020-10-26 19:43:57,081 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 67 [2020-10-26 19:43:57,423 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 67 [2020-10-26 19:43:57,769 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 71 [2020-10-26 19:43:58,137 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 72 [2020-10-26 19:43:58,521 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 73 [2020-10-26 19:43:58,915 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 73 [2020-10-26 19:43:59,283 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 77 [2020-10-26 19:43:59,837 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 86 [2020-10-26 19:44:00,243 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 74 [2020-10-26 19:44:00,886 WARN L193 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 111 [2020-10-26 19:44:01,287 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 74 [2020-10-26 19:44:01,854 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 101 [2020-10-26 19:44:02,318 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 102 [2020-10-26 19:44:02,900 WARN L193 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 108 [2020-10-26 19:44:03,373 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 103 [2020-10-26 19:44:03,922 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 102 [2020-10-26 19:44:04,382 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 97 [2020-10-26 19:44:04,840 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 93 [2020-10-26 19:44:05,113 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2020-10-26 19:44:05,592 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 101 [2020-10-26 19:44:05,895 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 69 [2020-10-26 19:44:06,215 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 84 [2020-10-26 19:44:06,513 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 76 [2020-10-26 19:44:06,855 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 80 [2020-10-26 19:44:07,197 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85