/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block 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=NARROWEST --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 -i ../../../trunk/examples/svcomp/list-ext3-properties/sll_length_check-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:33:07,477 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:33:07,480 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:33:07,522 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:33:07,522 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:33:07,530 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:33:07,532 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:33:07,535 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:33:07,538 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:33:07,542 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:33:07,542 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:33:07,543 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:33:07,544 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:33:07,547 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:33:07,549 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:33:07,551 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:33:07,552 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:33:07,554 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:33:07,556 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:33:07,564 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:33:07,566 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:33:07,567 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:33:07,568 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:33:07,569 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:33:07,581 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:33:07,581 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:33:07,581 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:33:07,587 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:33:07,587 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:33:07,588 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:33:07,588 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:33:07,594 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:33:07,595 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:33:07,598 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:33:07,598 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:33:07,599 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:33:07,599 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:33:07,599 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:33:07,600 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:33:07,600 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:33:07,603 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:33:07,605 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 [2020-10-13 10:33:07,643 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:33:07,644 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:33:07,646 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:33:07,646 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:33:07,646 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:33:07,647 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:33:07,647 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:33:07,647 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:33:07,647 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:33:07,648 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:33:07,649 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:33:07,649 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:33:07,649 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:33:07,650 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:33:07,650 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:33:07,650 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:33:07,650 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:33:07,650 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:33:07,651 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:33:07,651 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:33:07,651 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:33:07,651 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:33:07,651 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:33:07,652 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:33:07,652 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:33:07,652 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:33:07,652 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:33:07,652 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:33:07,652 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:33:07,653 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> 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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 10:33:07,930 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:33:07,945 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:33:07,949 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:33:07,950 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:33:07,950 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:33:07,951 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/sll_length_check-2.i [2020-10-13 10:33:08,028 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fb465e5a4/7f206795861c4265bd41396a55e5a287/FLAGa04cb0096 [2020-10-13 10:33:08,576 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:33:08,577 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext3-properties/sll_length_check-2.i [2020-10-13 10:33:08,600 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fb465e5a4/7f206795861c4265bd41396a55e5a287/FLAGa04cb0096 [2020-10-13 10:33:08,876 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fb465e5a4/7f206795861c4265bd41396a55e5a287 [2020-10-13 10:33:08,884 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:33:08,885 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:33:08,887 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:33:08,887 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:33:08,890 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:33:08,891 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:33:08" (1/1) ... [2020-10-13 10:33:08,895 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b337bef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:33:08, skipping insertion in model container [2020-10-13 10:33:08,895 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:33:08" (1/1) ... [2020-10-13 10:33:08,905 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:33:08,957 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:33:09,396 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:33:09,406 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:33:09,446 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:33:09,507 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:33:09,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:33:09 WrapperNode [2020-10-13 10:33:09,507 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:33:09,508 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:33:09,508 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:33:09,508 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:33:09,525 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:33:09" (1/1) ... [2020-10-13 10:33:09,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:33:09" (1/1) ... [2020-10-13 10:33:09,541 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:33:09" (1/1) ... [2020-10-13 10:33:09,541 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:33:09" (1/1) ... [2020-10-13 10:33:09,555 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:33:09" (1/1) ... [2020-10-13 10:33:09,561 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:33:09" (1/1) ... [2020-10-13 10:33:09,565 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:33:09" (1/1) ... [2020-10-13 10:33:09,574 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:33:09,575 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:33:09,575 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:33:09,575 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:33:09,576 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:33:09" (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 [2020-10-13 10:33:09,633 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:33:09,633 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:33:09,633 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-13 10:33:09,633 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-13 10:33:09,633 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-13 10:33:09,634 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2020-10-13 10:33:09,634 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_length [2020-10-13 10:33:09,634 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2020-10-13 10:33:09,634 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:33:09,634 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:33:09,634 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 10:33:09,635 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-13 10:33:09,635 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-13 10:33:09,635 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-13 10:33:09,635 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-13 10:33:09,635 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-13 10:33:09,635 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-13 10:33:09,636 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-13 10:33:09,636 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-13 10:33:09,636 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-13 10:33:09,636 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-13 10:33:09,636 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-13 10:33:09,636 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-13 10:33:09,637 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-13 10:33:09,637 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-13 10:33:09,637 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-13 10:33:09,637 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-13 10:33:09,637 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-13 10:33:09,637 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-13 10:33:09,638 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-13 10:33:09,638 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-13 10:33:09,638 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-13 10:33:09,638 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-13 10:33:09,638 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-13 10:33:09,638 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-13 10:33:09,638 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-13 10:33:09,639 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-13 10:33:09,639 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-13 10:33:09,639 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-13 10:33:09,639 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-13 10:33:09,639 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-13 10:33:09,639 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-13 10:33:09,639 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-13 10:33:09,640 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-13 10:33:09,640 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-13 10:33:09,640 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-13 10:33:09,640 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-13 10:33:09,640 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-13 10:33:09,640 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-13 10:33:09,641 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-13 10:33:09,641 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-13 10:33:09,641 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-13 10:33:09,641 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-13 10:33:09,641 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-13 10:33:09,641 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-13 10:33:09,641 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-13 10:33:09,642 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-13 10:33:09,642 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-13 10:33:09,642 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-13 10:33:09,642 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-13 10:33:09,642 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-13 10:33:09,642 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-13 10:33:09,642 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-13 10:33:09,643 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-13 10:33:09,643 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-13 10:33:09,643 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-13 10:33:09,643 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-13 10:33:09,643 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-13 10:33:09,643 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-13 10:33:09,644 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-13 10:33:09,644 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-13 10:33:09,644 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-13 10:33:09,644 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 10:33:09,644 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-13 10:33:09,644 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-13 10:33:09,645 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-13 10:33:09,645 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-13 10:33:09,645 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-13 10:33:09,645 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-13 10:33:09,645 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-13 10:33:09,645 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-13 10:33:09,645 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-13 10:33:09,646 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-13 10:33:09,646 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-13 10:33:09,646 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-13 10:33:09,646 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-13 10:33:09,646 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-13 10:33:09,646 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-13 10:33:09,647 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-13 10:33:09,647 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-13 10:33:09,647 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-13 10:33:09,647 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-13 10:33:09,647 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-13 10:33:09,647 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-13 10:33:09,647 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-13 10:33:09,648 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-13 10:33:09,648 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-13 10:33:09,648 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-13 10:33:09,648 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-13 10:33:09,648 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-13 10:33:09,648 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-13 10:33:09,648 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-13 10:33:09,649 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-13 10:33:09,649 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-13 10:33:09,649 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-13 10:33:09,649 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-13 10:33:09,649 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-13 10:33:09,649 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-13 10:33:09,649 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-13 10:33:09,650 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-13 10:33:09,650 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-13 10:33:09,650 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-13 10:33:09,650 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-13 10:33:09,650 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-13 10:33:09,650 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-13 10:33:09,650 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-13 10:33:09,651 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-13 10:33:09,651 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2020-10-13 10:33:09,651 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-13 10:33:09,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-13 10:33:09,651 INFO L130 BoogieDeclarations]: Found specification of procedure sll_length [2020-10-13 10:33:09,651 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-13 10:33:09,652 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2020-10-13 10:33:09,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 10:33:09,652 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:33:09,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:33:09,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:33:10,038 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-13 10:33:10,202 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:33:10,202 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-13 10:33:10,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:33:10 BoogieIcfgContainer [2020-10-13 10:33:10,207 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:33:10,208 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:33:10,209 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:33:10,212 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:33:10,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:33:08" (1/3) ... [2020-10-13 10:33:10,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@371a1889 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:33:10, skipping insertion in model container [2020-10-13 10:33:10,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:33:09" (2/3) ... [2020-10-13 10:33:10,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@371a1889 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:33:10, skipping insertion in model container [2020-10-13 10:33:10,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:33:10" (3/3) ... [2020-10-13 10:33:10,216 INFO L109 eAbstractionObserver]: Analyzing ICFG sll_length_check-2.i [2020-10-13 10:33:10,226 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:33:10,234 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:33:10,248 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:33:10,268 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:33:10,269 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:33:10,269 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:33:10,269 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:33:10,270 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:33:10,270 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:33:10,270 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:33:10,270 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:33:10,289 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-10-13 10:33:10,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 10:33:10,295 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:33:10,296 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:33:10,297 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:33:10,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:33:10,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1666427650, now seen corresponding path program 1 times [2020-10-13 10:33:10,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:33:10,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1822237834] [2020-10-13 10:33:10,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:33:10,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:10,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:10,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:10,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:10,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:10,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 10:33:10,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:33:10,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 200 [2020-10-13 10:33:10,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:10,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:33:10,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 10:33:10,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:33:10,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 10:33:10,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:33:10,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:10,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:10,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:10,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:33:10,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:10,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 10:33:10,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:10,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:33:10,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:33:10,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:33:10,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:33:10,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 10:33:10,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:10,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:10,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:10,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:10,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:33:10,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:33:10,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-13 10:33:10,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:10,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:33:10,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-13 10:33:10,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:33:10,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:33:10,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-13 10:33:10,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:10,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:10,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:10,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:33:10,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:10,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-13 10:33:10,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:10,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:33:10,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-13 10:33:10,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:33:10,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:10,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:33:10,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1822237834] [2020-10-13 10:33:10,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:33:10,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 10:33:10,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002936912] [2020-10-13 10:33:10,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:33:10,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:33:10,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:33:10,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:33:10,814 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 4 states. [2020-10-13 10:33:10,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:33:10,984 INFO L93 Difference]: Finished difference Result 90 states and 120 transitions. [2020-10-13 10:33:10,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:33:10,986 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-13 10:33:10,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:33:10,996 INFO L225 Difference]: With dead ends: 90 [2020-10-13 10:33:10,996 INFO L226 Difference]: Without dead ends: 38 [2020-10-13 10:33:11,000 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:33:11,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-13 10:33:11,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2020-10-13 10:33:11,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-13 10:33:11,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-10-13 10:33:11,049 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 23 [2020-10-13 10:33:11,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:33:11,050 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-10-13 10:33:11,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:33:11,050 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-10-13 10:33:11,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 10:33:11,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:33:11,051 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:33:11,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:33:11,052 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:33:11,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:33:11,053 INFO L82 PathProgramCache]: Analyzing trace with hash -29727073, now seen corresponding path program 1 times [2020-10-13 10:33:11,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:33:11,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [200373398] [2020-10-13 10:33:11,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:33:11,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:11,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:11,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:11,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 10:33:11,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:11,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 154 [2020-10-13 10:33:11,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:11,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:33:11,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:33:11,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 10:33:11,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:11,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:33:11,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:11,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:11,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:11,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:33:11,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:11,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:33:11,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:11,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:33:11,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:33:11,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:33:11,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:33:11,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-13 10:33:11,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:11,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:11,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:11,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:33:11,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:11,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-13 10:33:11,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:11,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:33:11,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 10:33:11,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:33:11,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:11,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-13 10:33:11,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:11,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:11,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:11,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:33:11,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:11,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 10:33:11,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:11,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:33:11,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-13 10:33:11,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:33:11,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:11,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:33:11,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [200373398] [2020-10-13 10:33:11,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:33:11,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 10:33:11,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336911300] [2020-10-13 10:33:11,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:33:11,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:33:11,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:33:11,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:33:11,361 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 7 states. [2020-10-13 10:33:11,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:33:11,564 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2020-10-13 10:33:11,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 10:33:11,565 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-13 10:33:11,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:33:11,566 INFO L225 Difference]: With dead ends: 45 [2020-10-13 10:33:11,566 INFO L226 Difference]: Without dead ends: 31 [2020-10-13 10:33:11,567 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:33:11,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-13 10:33:11,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-10-13 10:33:11,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-13 10:33:11,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-10-13 10:33:11,575 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 25 [2020-10-13 10:33:11,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:33:11,575 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-10-13 10:33:11,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:33:11,576 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-10-13 10:33:11,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 10:33:11,577 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:33:11,577 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] [2020-10-13 10:33:11,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:33:11,578 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:33:11,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:33:11,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1680455870, now seen corresponding path program 1 times [2020-10-13 10:33:11,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:33:11,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1931541981] [2020-10-13 10:33:11,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:33:11,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:11,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:11,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:11,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:12,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:12,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 10:33:12,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:33:12,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 605 [2020-10-13 10:33:12,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:12,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:33:12,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 10:33:12,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 10:33:12,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:12,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:33:12,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:12,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:12,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:12,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:33:12,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:12,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:33:12,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:12,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:33:12,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:33:12,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:33:12,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:33:12,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-13 10:33:12,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:12,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:12,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:12,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:12,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-13 10:33:12,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:33:12,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-13 10:33:12,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:12,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:33:12,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:33:12,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 10:33:12,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:33:12,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-13 10:33:12,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:12,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:12,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:12,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 10:33:12,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:12,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-13 10:33:12,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:12,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:33:12,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 10:33:12,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:33:12,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:33:12,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:33:12,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1931541981] [2020-10-13 10:33:12,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:33:12,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-13 10:33:12,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011910618] [2020-10-13 10:33:12,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 10:33:12,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:33:12,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 10:33:12,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:33:12,424 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 11 states. [2020-10-13 10:33:12,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:33:12,692 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2020-10-13 10:33:12,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 10:33:12,692 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-13 10:33:12,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:33:12,693 INFO L225 Difference]: With dead ends: 39 [2020-10-13 10:33:12,694 INFO L226 Difference]: Without dead ends: 32 [2020-10-13 10:33:12,694 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:33:12,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-13 10:33:12,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-10-13 10:33:12,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-13 10:33:12,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-10-13 10:33:12,701 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 28 [2020-10-13 10:33:12,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:33:12,702 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-10-13 10:33:12,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 10:33:12,702 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-10-13 10:33:12,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 10:33:12,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:33:12,703 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] [2020-10-13 10:33:12,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:33:12,704 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:33:12,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:33:12,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1808388506, now seen corresponding path program 1 times [2020-10-13 10:33:12,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:33:12,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [959946343] [2020-10-13 10:33:12,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:33:12,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:12,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:12,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:12,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:12,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 10:33:12,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:33:12,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 153 [2020-10-13 10:33:12,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:12,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:33:12,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:33:12,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 10:33:12,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:12,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:33:12,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:12,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:12,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:12,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:33:12,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:12,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:33:12,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:12,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:33:12,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:33:12,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:33:12,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:33:12,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-13 10:33:12,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:12,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:12,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:12,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-13 10:33:12,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:12,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-13 10:33:12,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:12,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:33:12,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 10:33:12,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:33:12,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:12,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-13 10:33:12,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:12,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:12,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:12,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-13 10:33:12,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:12,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 10:33:12,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:12,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:33:12,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-10-13 10:33:12,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:33:12,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:12,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:33:12,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [959946343] [2020-10-13 10:33:12,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:33:12,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 10:33:12,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058134405] [2020-10-13 10:33:12,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:33:12,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:33:12,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:33:12,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:33:12,994 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 8 states. [2020-10-13 10:33:13,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:33:13,193 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-10-13 10:33:13,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 10:33:13,193 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-10-13 10:33:13,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:33:13,196 INFO L225 Difference]: With dead ends: 60 [2020-10-13 10:33:13,196 INFO L226 Difference]: Without dead ends: 48 [2020-10-13 10:33:13,197 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:33:13,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-13 10:33:13,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2020-10-13 10:33:13,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 10:33:13,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2020-10-13 10:33:13,207 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 29 [2020-10-13 10:33:13,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:33:13,208 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2020-10-13 10:33:13,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:33:13,208 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2020-10-13 10:33:13,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 10:33:13,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:33:13,211 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 10:33:13,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:33:13,211 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:33:13,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:33:13,212 INFO L82 PathProgramCache]: Analyzing trace with hash 560900285, now seen corresponding path program 2 times [2020-10-13 10:33:13,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:33:13,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [127148246] [2020-10-13 10:33:13,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:33:13,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:13,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:13,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:13,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:13,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 10:33:13,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:33:13,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 379 [2020-10-13 10:33:13,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:13,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:33:13,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 10:33:13,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 10:33:13,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:13,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:33:13,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:13,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:13,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:13,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:33:13,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:13,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:33:13,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:13,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:33:13,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:33:13,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:33:13,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 10:33:13,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-13 10:33:13,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:13,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:13,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:13,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:13,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 10:33:13,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:33:13,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-10-13 10:33:13,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:13,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:33:13,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:33:13,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 10:33:13,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:13,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-13 10:33:13,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:13,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:13,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:13,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-13 10:33:13,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:13,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-13 10:33:13,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:13,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:33:13,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 10:33:13,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 10:33:13,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:13,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:33:13,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [127148246] [2020-10-13 10:33:13,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:33:13,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 10:33:13,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557075573] [2020-10-13 10:33:13,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 10:33:13,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:33:13,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 10:33:13,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:33:13,959 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand 13 states. [2020-10-13 10:33:14,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:33:14,384 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2020-10-13 10:33:14,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 10:33:14,387 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-10-13 10:33:14,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:33:14,388 INFO L225 Difference]: With dead ends: 56 [2020-10-13 10:33:14,388 INFO L226 Difference]: Without dead ends: 52 [2020-10-13 10:33:14,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:33:14,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-13 10:33:14,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2020-10-13 10:33:14,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-13 10:33:14,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2020-10-13 10:33:14,407 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 32 [2020-10-13 10:33:14,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:33:14,408 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2020-10-13 10:33:14,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 10:33:14,408 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2020-10-13 10:33:14,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 10:33:14,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:33:14,411 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] [2020-10-13 10:33:14,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 10:33:14,412 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:33:14,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:33:14,412 INFO L82 PathProgramCache]: Analyzing trace with hash -124828656, now seen corresponding path program 1 times [2020-10-13 10:33:14,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:33:14,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1620262322] [2020-10-13 10:33:14,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:33:14,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:14,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:14,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:14,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:14,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 10:33:14,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:33:14,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 253 [2020-10-13 10:33:14,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:14,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:33:14,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:33:14,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 10:33:14,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:14,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:33:14,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:14,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:14,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:14,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:33:14,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:14,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:33:14,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:14,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:33:14,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:33:14,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:33:14,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:14,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-13 10:33:14,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:14,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:14,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:14,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-13 10:33:14,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:14,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-13 10:33:14,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:14,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:33:14,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 10:33:14,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:33:14,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:14,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-13 10:33:14,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:14,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:14,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:14,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-13 10:33:14,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:14,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:33:14,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:14,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:33:14,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-10-13 10:33:14,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:33:14,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:14,807 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:33:14,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1620262322] [2020-10-13 10:33:14,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:33:14,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 10:33:14,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938708902] [2020-10-13 10:33:14,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 10:33:14,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:33:14,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 10:33:14,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:33:14,811 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand 9 states. [2020-10-13 10:33:15,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:33:15,057 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2020-10-13 10:33:15,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 10:33:15,058 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2020-10-13 10:33:15,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:33:15,059 INFO L225 Difference]: With dead ends: 68 [2020-10-13 10:33:15,059 INFO L226 Difference]: Without dead ends: 46 [2020-10-13 10:33:15,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:33:15,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-13 10:33:15,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 34. [2020-10-13 10:33:15,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-13 10:33:15,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-10-13 10:33:15,067 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 32 [2020-10-13 10:33:15,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:33:15,068 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-10-13 10:33:15,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 10:33:15,068 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-10-13 10:33:15,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 10:33:15,069 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:33:15,069 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] [2020-10-13 10:33:15,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 10:33:15,070 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:33:15,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:33:15,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1724014721, now seen corresponding path program 3 times [2020-10-13 10:33:15,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:33:15,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [19691401] [2020-10-13 10:33:15,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:33:15,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:15,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:15,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:15,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:15,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 10:33:15,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:33:15,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 406 [2020-10-13 10:33:15,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:15,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 10:33:15,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 10:33:15,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 10:33:15,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:15,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:33:15,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:15,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:15,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:15,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:33:15,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:15,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:33:15,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:15,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:33:15,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:33:15,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:33:15,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:33:15,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-13 10:33:15,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:15,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:15,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:15,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 10:33:15,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:15,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-13 10:33:15,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:15,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:33:15,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:33:15,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 10:33:15,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:33:15,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-13 10:33:15,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:15,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:15,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:15,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-13 10:33:15,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:15,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-13 10:33:15,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:15,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:33:15,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:33:15,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 10:33:15,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:33:15,922 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:33:15,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [19691401] [2020-10-13 10:33:15,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:33:15,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 10:33:15,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23925192] [2020-10-13 10:33:15,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 10:33:15,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:33:15,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 10:33:15,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:33:15,925 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 15 states. [2020-10-13 10:33:16,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:33:16,591 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2020-10-13 10:33:16,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 10:33:16,592 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 33 [2020-10-13 10:33:16,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:33:16,593 INFO L225 Difference]: With dead ends: 66 [2020-10-13 10:33:16,594 INFO L226 Difference]: Without dead ends: 62 [2020-10-13 10:33:16,595 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2020-10-13 10:33:16,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-13 10:33:16,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2020-10-13 10:33:16,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-13 10:33:16,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2020-10-13 10:33:16,607 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 33 [2020-10-13 10:33:16,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:33:16,607 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2020-10-13 10:33:16,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 10:33:16,608 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2020-10-13 10:33:16,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 10:33:16,609 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:33:16,609 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:33:16,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 10:33:16,610 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:33:16,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:33:16,610 INFO L82 PathProgramCache]: Analyzing trace with hash 458064125, now seen corresponding path program 4 times [2020-10-13 10:33:16,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:33:16,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [546420007] [2020-10-13 10:33:16,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:33:16,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:16,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:16,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:17,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:17,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 10:33:17,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:33:17,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 441 [2020-10-13 10:33:17,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:17,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 10:33:17,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 10:33:17,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 10:33:17,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:17,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:33:17,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:17,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:17,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:17,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:33:17,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:17,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:33:17,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:17,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:33:17,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:33:17,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:33:17,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:17,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-13 10:33:17,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:17,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:17,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:17,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 10:33:17,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:17,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-13 10:33:17,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:17,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:33:17,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:33:17,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 10:33:17,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:17,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-13 10:33:17,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:17,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:17,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:17,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-13 10:33:17,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:17,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-13 10:33:17,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:17,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:33:17,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 10:33:17,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:33:17,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:17,491 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:33:17,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [546420007] [2020-10-13 10:33:17,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:33:17,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 10:33:17,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068557373] [2020-10-13 10:33:17,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 10:33:17,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:33:17,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 10:33:17,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:33:17,494 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand 16 states. [2020-10-13 10:33:18,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:33:18,030 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2020-10-13 10:33:18,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 10:33:18,031 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 34 [2020-10-13 10:33:18,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:33:18,032 INFO L225 Difference]: With dead ends: 74 [2020-10-13 10:33:18,033 INFO L226 Difference]: Without dead ends: 65 [2020-10-13 10:33:18,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2020-10-13 10:33:18,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-13 10:33:18,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 61. [2020-10-13 10:33:18,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-13 10:33:18,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2020-10-13 10:33:18,044 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 34 [2020-10-13 10:33:18,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:33:18,045 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2020-10-13 10:33:18,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 10:33:18,045 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2020-10-13 10:33:18,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 10:33:18,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:33:18,046 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 10:33:18,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 10:33:18,046 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:33:18,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:33:18,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1775282106, now seen corresponding path program 5 times [2020-10-13 10:33:18,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:33:18,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [780318131] [2020-10-13 10:33:18,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:33:18,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:18,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:18,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:18,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:18,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 10:33:18,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:33:18,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 235 [2020-10-13 10:33:18,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:18,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:33:18,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:33:18,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 10:33:18,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:33:18,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:33:18,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:18,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:18,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:18,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:33:18,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:18,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:33:18,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:18,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:33:18,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:33:18,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:33:18,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:18,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-13 10:33:18,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:18,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:18,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:18,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-13 10:33:18,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:18,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-10-13 10:33:18,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:18,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:33:18,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 10:33:18,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 10:33:18,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:18,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-13 10:33:18,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:18,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:18,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:18,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-13 10:33:18,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:18,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 10:33:18,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:18,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:33:18,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:33:18,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:33:18,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:18,452 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 10:33:18,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [780318131] [2020-10-13 10:33:18,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:33:18,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 10:33:18,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959212284] [2020-10-13 10:33:18,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 10:33:18,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:33:18,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 10:33:18,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:33:18,454 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand 9 states. [2020-10-13 10:33:18,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:33:18,641 INFO L93 Difference]: Finished difference Result 76 states and 83 transitions. [2020-10-13 10:33:18,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 10:33:18,641 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-10-13 10:33:18,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:33:18,642 INFO L225 Difference]: With dead ends: 76 [2020-10-13 10:33:18,642 INFO L226 Difference]: Without dead ends: 44 [2020-10-13 10:33:18,643 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:33:18,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-13 10:33:18,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2020-10-13 10:33:18,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 10:33:18,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-10-13 10:33:18,649 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 37 [2020-10-13 10:33:18,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:33:18,649 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-10-13 10:33:18,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 10:33:18,650 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-10-13 10:33:18,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 10:33:18,650 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:33:18,650 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:33:18,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 10:33:18,651 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:33:18,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:33:18,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1475160556, now seen corresponding path program 2 times [2020-10-13 10:33:18,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:33:18,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1514513367] [2020-10-13 10:33:18,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:33:18,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:18,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:18,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:18,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:18,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 10:33:18,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:33:18,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 319 [2020-10-13 10:33:18,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:18,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 10:33:18,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 10:33:18,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 10:33:18,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:33:19,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:33:19,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:19,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:19,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:19,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:33:19,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:19,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:33:19,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:19,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:33:19,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:33:19,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:33:19,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:33:19,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-13 10:33:19,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:19,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:19,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:19,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:19,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-13 10:33:19,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:33:19,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 192 [2020-10-13 10:33:19,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:19,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:33:19,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:33:19,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 10:33:19,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 10:33:19,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-13 10:33:19,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:19,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:19,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:19,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-13 10:33:19,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:19,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-13 10:33:19,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:19,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:33:19,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 10:33:19,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 10:33:19,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:33:19,895 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:33:19,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1514513367] [2020-10-13 10:33:19,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:33:19,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 10:33:19,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340273018] [2020-10-13 10:33:19,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 10:33:19,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:33:19,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 10:33:19,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:33:19,898 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 15 states. [2020-10-13 10:33:20,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:33:20,730 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-10-13 10:33:20,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 10:33:20,732 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2020-10-13 10:33:20,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:33:20,733 INFO L225 Difference]: With dead ends: 50 [2020-10-13 10:33:20,733 INFO L226 Difference]: Without dead ends: 43 [2020-10-13 10:33:20,734 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2020-10-13 10:33:20,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-13 10:33:20,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2020-10-13 10:33:20,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 10:33:20,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-10-13 10:33:20,745 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 39 [2020-10-13 10:33:20,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:33:20,747 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-10-13 10:33:20,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 10:33:20,748 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-10-13 10:33:20,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 10:33:20,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:33:20,748 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 10:33:20,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 10:33:20,749 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:33:20,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:33:20,749 INFO L82 PathProgramCache]: Analyzing trace with hash 848249904, now seen corresponding path program 3 times [2020-10-13 10:33:20,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:33:20,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [273100676] [2020-10-13 10:33:20,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:33:20,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:20,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:20,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:21,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:21,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 10:33:21,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:33:21,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 624 [2020-10-13 10:33:21,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:21,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 10:33:21,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 10:33:21,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 10:33:21,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:21,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:33:21,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:21,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:21,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:21,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:33:21,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:21,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:33:21,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:21,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:33:21,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:33:21,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:33:21,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:33:21,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-13 10:33:21,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:21,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:21,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:21,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-13 10:33:21,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:21,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-10-13 10:33:21,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:21,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:33:21,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:33:21,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 10:33:21,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:21,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-13 10:33:21,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:21,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:21,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:21,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-13 10:33:21,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:21,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-13 10:33:21,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:21,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:33:21,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:33:21,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:33:21,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:21,777 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:33:21,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [273100676] [2020-10-13 10:33:21,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:33:21,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 10:33:21,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836031092] [2020-10-13 10:33:21,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 10:33:21,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:33:21,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 10:33:21,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:33:21,779 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 17 states. [2020-10-13 10:33:22,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:33:22,337 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2020-10-13 10:33:22,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 10:33:22,337 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 40 [2020-10-13 10:33:22,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:33:22,338 INFO L225 Difference]: With dead ends: 61 [2020-10-13 10:33:22,338 INFO L226 Difference]: Without dead ends: 57 [2020-10-13 10:33:22,341 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2020-10-13 10:33:22,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-13 10:33:22,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2020-10-13 10:33:22,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-13 10:33:22,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2020-10-13 10:33:22,350 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 40 [2020-10-13 10:33:22,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:33:22,350 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2020-10-13 10:33:22,350 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 10:33:22,350 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2020-10-13 10:33:22,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 10:33:22,351 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:33:22,367 INFO L422 BasicCegarLoop]: trace histogram [4, 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] [2020-10-13 10:33:22,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 10:33:22,368 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:33:22,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:33:22,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1406111124, now seen corresponding path program 4 times [2020-10-13 10:33:22,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:33:22,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [162928070] [2020-10-13 10:33:22,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:33:22,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:22,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:22,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:22,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:22,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 10:33:22,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:33:22,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 478 [2020-10-13 10:33:22,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:22,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 10:33:22,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 10:33:22,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 10:33:22,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:22,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:33:22,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:22,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:22,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:22,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:33:22,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:22,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:33:22,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:22,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:33:22,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:33:22,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:33:22,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:22,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-13 10:33:22,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:22,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:23,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:23,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-13 10:33:23,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:23,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-10-13 10:33:23,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:23,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:33:23,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:33:23,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 10:33:23,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:23,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-13 10:33:23,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:23,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:23,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:23,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-13 10:33:23,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:23,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-13 10:33:23,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:23,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:33:23,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 10:33:23,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 10:33:23,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:33:23,434 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:33:23,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [162928070] [2020-10-13 10:33:23,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:33:23,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 10:33:23,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835923757] [2020-10-13 10:33:23,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 10:33:23,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:33:23,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 10:33:23,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:33:23,437 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand 19 states. [2020-10-13 10:33:24,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:33:24,199 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2020-10-13 10:33:24,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 10:33:24,199 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 41 [2020-10-13 10:33:24,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:33:24,200 INFO L225 Difference]: With dead ends: 59 [2020-10-13 10:33:24,200 INFO L226 Difference]: Without dead ends: 50 [2020-10-13 10:33:24,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2020-10-13 10:33:24,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-13 10:33:24,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2020-10-13 10:33:24,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-13 10:33:24,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-10-13 10:33:24,216 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 41 [2020-10-13 10:33:24,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:33:24,217 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-10-13 10:33:24,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 10:33:24,218 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-10-13 10:33:24,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 10:33:24,221 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:33:24,221 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:33:24,221 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 10:33:24,221 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:33:24,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:33:24,222 INFO L82 PathProgramCache]: Analyzing trace with hash -676645977, now seen corresponding path program 5 times [2020-10-13 10:33:24,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:33:24,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [494004929] [2020-10-13 10:33:24,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:33:24,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:24,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:24,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:24,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:25,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:27,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:27,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 10:33:27,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:33:27,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3726 [2020-10-13 10:33:27,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:27,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:33:27,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:33:27,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 10:33:27,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:27,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:33:27,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:28,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:28,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:28,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:33:28,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:28,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:33:28,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:28,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:33:28,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:33:28,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:33:28,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:28,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-13 10:33:28,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:28,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:28,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:28,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 10:33:28,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:28,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-13 10:33:28,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:28,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:33:28,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 10:33:28,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 10:33:28,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:28,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 10:33:28,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:28,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:28,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:28,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-13 10:33:28,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:28,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:33:28,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:28,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:33:28,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:33:28,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:33:28,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:28,160 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 10:33:28,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [494004929] [2020-10-13 10:33:28,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:33:28,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 10:33:28,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984165087] [2020-10-13 10:33:28,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 10:33:28,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:33:28,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 10:33:28,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:33:28,163 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 11 states. [2020-10-13 10:33:28,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:33:28,366 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2020-10-13 10:33:28,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 10:33:28,366 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2020-10-13 10:33:28,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:33:28,367 INFO L225 Difference]: With dead ends: 62 [2020-10-13 10:33:28,367 INFO L226 Difference]: Without dead ends: 47 [2020-10-13 10:33:28,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:33:28,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-13 10:33:28,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-13 10:33:28,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-13 10:33:28,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2020-10-13 10:33:28,382 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 43 [2020-10-13 10:33:28,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:33:28,383 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2020-10-13 10:33:28,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 10:33:28,385 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2020-10-13 10:33:28,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 10:33:28,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:33:28,386 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:33:28,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 10:33:28,386 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:33:28,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:33:28,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1210326941, now seen corresponding path program 6 times [2020-10-13 10:33:28,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:33:28,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1691153893] [2020-10-13 10:33:28,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:33:28,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:28,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:28,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:29,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:29,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 10:33:29,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:33:29,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 614 [2020-10-13 10:33:29,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:29,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 10:33:29,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 10:33:29,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 10:33:29,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:29,356 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 36 [2020-10-13 10:33:29,605 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 36 [2020-10-13 10:33:29,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:33:29,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:29,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:29,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:29,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:33:29,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:29,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:33:29,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:29,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:33:29,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:33:29,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:33:29,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:29,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-13 10:33:29,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:29,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:29,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:29,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:29,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 10:33:29,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:33:29,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-10-13 10:33:29,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:29,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:33:29,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:33:29,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 10:33:29,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:30,113 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-13 10:33:30,299 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-13 10:33:30,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-13 10:33:30,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:30,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:30,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:30,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-13 10:33:30,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:30,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-13 10:33:30,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:30,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:33:30,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 10:33:30,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:33:30,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:33:30,683 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 10:33:30,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1691153893] [2020-10-13 10:33:30,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:33:30,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 10:33:30,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606269753] [2020-10-13 10:33:30,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 10:33:30,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:33:30,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 10:33:30,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:33:30,686 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand 17 states. [2020-10-13 10:33:31,555 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 99 [2020-10-13 10:33:32,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:33:32,059 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2020-10-13 10:33:32,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 10:33:32,060 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 46 [2020-10-13 10:33:32,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:33:32,061 INFO L225 Difference]: With dead ends: 57 [2020-10-13 10:33:32,061 INFO L226 Difference]: Without dead ends: 50 [2020-10-13 10:33:32,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2020-10-13 10:33:32,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-13 10:33:32,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-10-13 10:33:32,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-13 10:33:32,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2020-10-13 10:33:32,070 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 46 [2020-10-13 10:33:32,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:33:32,070 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2020-10-13 10:33:32,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 10:33:32,070 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2020-10-13 10:33:32,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 10:33:32,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:33:32,071 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:33:32,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 10:33:32,071 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:33:32,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:33:32,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1228342431, now seen corresponding path program 7 times [2020-10-13 10:33:32,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:33:32,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627528781] [2020-10-13 10:33:32,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:33:32,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:32,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:32,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:32,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:32,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 10:33:32,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:33:32,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 830 [2020-10-13 10:33:32,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:32,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 10:33:32,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:33:32,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 10:33:32,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:33:32,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:33:32,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:32,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:32,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:32,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:33:32,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:32,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:33:32,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:32,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:33:32,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:33:32,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:33:32,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:33:32,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-13 10:33:32,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:32,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:33,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:33,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 10:33:33,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:33,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-10-13 10:33:33,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:33,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:33:33,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:33:33,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 10:33:33,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:33,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-13 10:33:33,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:33,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:33,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:33,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-13 10:33:33,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:33,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-13 10:33:33,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:33,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:33:33,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:33:33,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 10:33:33,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:33,385 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 10:33:33,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627528781] [2020-10-13 10:33:33,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:33:33,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 10:33:33,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588566663] [2020-10-13 10:33:33,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 10:33:33,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:33:33,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 10:33:33,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:33:33,388 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 19 states. [2020-10-13 10:33:34,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:33:34,012 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2020-10-13 10:33:34,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 10:33:34,012 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 47 [2020-10-13 10:33:34,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:33:34,013 INFO L225 Difference]: With dead ends: 70 [2020-10-13 10:33:34,013 INFO L226 Difference]: Without dead ends: 66 [2020-10-13 10:33:34,014 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2020-10-13 10:33:34,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-13 10:33:34,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2020-10-13 10:33:34,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-13 10:33:34,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2020-10-13 10:33:34,027 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 47 [2020-10-13 10:33:34,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:33:34,028 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2020-10-13 10:33:34,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 10:33:34,028 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2020-10-13 10:33:34,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 10:33:34,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:33:34,029 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:33:34,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 10:33:34,029 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:33:34,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:33:34,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1786822621, now seen corresponding path program 8 times [2020-10-13 10:33:34,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:33:34,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1026061008] [2020-10-13 10:33:34,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:33:34,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:34,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:34,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:34,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:34,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 10:33:34,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:33:34,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 704 [2020-10-13 10:33:34,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:34,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 10:33:34,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 10:33:34,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 10:33:34,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:34,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:33:34,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:34,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:34,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:34,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:33:34,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:34,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:33:34,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:34,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:33:34,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:33:34,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:33:34,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:34,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-13 10:33:34,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:34,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:35,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:35,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 10:33:35,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:35,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 162 [2020-10-13 10:33:35,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:35,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 10:33:35,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:33:35,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 10:33:35,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:35,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-13 10:33:35,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:35,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:35,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:35,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-13 10:33:35,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:35,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-13 10:33:35,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:35,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:33:35,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 10:33:35,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 10:33:35,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:33:35,694 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 10:33:35,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1026061008] [2020-10-13 10:33:35,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:33:35,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 10:33:35,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059650835] [2020-10-13 10:33:35,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 10:33:35,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:33:35,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 10:33:35,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:33:35,697 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand 22 states. [2020-10-13 10:33:36,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:33:36,946 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2020-10-13 10:33:36,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 10:33:36,947 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 48 [2020-10-13 10:33:36,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:33:36,948 INFO L225 Difference]: With dead ends: 66 [2020-10-13 10:33:36,948 INFO L226 Difference]: Without dead ends: 57 [2020-10-13 10:33:36,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=104, Invalid=1018, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 10:33:36,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-13 10:33:36,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2020-10-13 10:33:36,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-13 10:33:36,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2020-10-13 10:33:36,959 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 48 [2020-10-13 10:33:36,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:33:36,959 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2020-10-13 10:33:36,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 10:33:36,959 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2020-10-13 10:33:36,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 10:33:36,960 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:33:36,960 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:33:36,960 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 10:33:36,960 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:33:36,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:33:36,961 INFO L82 PathProgramCache]: Analyzing trace with hash -364785982, now seen corresponding path program 9 times [2020-10-13 10:33:36,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:33:36,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1429564082] [2020-10-13 10:33:36,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:33:36,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:36,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:37,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:37,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:38,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:41,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:41,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 10:33:41,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:33:41,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4772 [2020-10-13 10:33:41,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:41,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:33:41,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:33:41,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 10:33:41,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:41,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:33:41,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:41,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:41,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:41,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:33:41,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:41,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:33:41,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:41,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:33:41,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:33:41,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:33:41,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:41,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-13 10:33:41,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:41,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:41,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:41,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 10:33:41,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:41,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-13 10:33:41,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:41,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:33:41,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 10:33:41,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 10:33:41,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:41,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-13 10:33:41,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:41,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:41,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:41,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-13 10:33:41,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:41,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:33:41,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:41,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:33:41,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:33:41,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:33:41,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:41,927 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 39 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-13 10:33:41,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1429564082] [2020-10-13 10:33:41,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:33:41,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 10:33:41,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462262551] [2020-10-13 10:33:41,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 10:33:41,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:33:41,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 10:33:41,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:33:41,930 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand 13 states. [2020-10-13 10:33:42,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:33:42,258 INFO L93 Difference]: Finished difference Result 70 states and 78 transitions. [2020-10-13 10:33:42,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 10:33:42,258 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 50 [2020-10-13 10:33:42,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:33:42,259 INFO L225 Difference]: With dead ends: 70 [2020-10-13 10:33:42,259 INFO L226 Difference]: Without dead ends: 54 [2020-10-13 10:33:42,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:33:42,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-13 10:33:42,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-13 10:33:42,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-13 10:33:42,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2020-10-13 10:33:42,266 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 50 [2020-10-13 10:33:42,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:33:42,267 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2020-10-13 10:33:42,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 10:33:42,267 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2020-10-13 10:33:42,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 10:33:42,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:33:42,268 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:33:42,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 10:33:42,268 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:33:42,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:33:42,268 INFO L82 PathProgramCache]: Analyzing trace with hash 157000204, now seen corresponding path program 10 times [2020-10-13 10:33:42,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:33:42,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [851027631] [2020-10-13 10:33:42,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:33:42,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:42,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:42,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:43,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:43,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 10:33:43,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:33:43,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 806 [2020-10-13 10:33:43,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:43,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 10:33:43,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 10:33:43,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 10:33:43,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:46,877 WARN L193 SmtUtils]: Spent 3.46 s on a formula simplification. DAG size of input: 479 DAG size of output: 77 [2020-10-13 10:33:51,053 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 479 DAG size of output: 80 [2020-10-13 10:33:51,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:33:51,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:51,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:51,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:51,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:33:51,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:51,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:33:51,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:51,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:33:51,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:33:51,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:33:51,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:51,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-13 10:33:51,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:51,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:51,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:51,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:51,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 10:33:51,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:33:51,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 417 [2020-10-13 10:33:51,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:51,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:33:51,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:33:51,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 10:33:51,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:52,040 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 17 [2020-10-13 10:33:52,741 WARN L193 SmtUtils]: Spent 564.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 25 [2020-10-13 10:33:53,363 WARN L193 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 41 [2020-10-13 10:33:53,960 WARN L193 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 34 [2020-10-13 10:33:53,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-13 10:33:53,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:53,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:54,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:54,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-13 10:33:54,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:54,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-13 10:33:54,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:54,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:33:54,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 10:33:54,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 10:33:54,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:54,444 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 47 [2020-10-13 10:33:54,903 WARN L193 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 60 [2020-10-13 10:33:55,223 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 52 [2020-10-13 10:33:55,244 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 5 proven. 40 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-13 10:33:55,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [851027631] [2020-10-13 10:33:55,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:33:55,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 10:33:55,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056250715] [2020-10-13 10:33:55,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 10:33:55,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:33:55,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 10:33:55,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:33:55,246 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand 19 states. [2020-10-13 10:33:55,998 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 64 [2020-10-13 10:33:56,741 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 78 [2020-10-13 10:33:56,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:33:56,831 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2020-10-13 10:33:56,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 10:33:56,832 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 53 [2020-10-13 10:33:56,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:33:56,833 INFO L225 Difference]: With dead ends: 64 [2020-10-13 10:33:56,833 INFO L226 Difference]: Without dead ends: 57 [2020-10-13 10:33:56,834 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2020-10-13 10:33:56,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-13 10:33:56,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2020-10-13 10:33:56,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-13 10:33:56,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2020-10-13 10:33:56,841 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 53 [2020-10-13 10:33:56,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:33:56,842 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2020-10-13 10:33:56,842 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 10:33:56,842 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2020-10-13 10:33:56,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 10:33:56,842 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:33:56,843 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:33:56,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 10:33:56,843 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:33:56,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:33:56,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1360015344, now seen corresponding path program 11 times [2020-10-13 10:33:56,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:33:56,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [565270131] [2020-10-13 10:33:56,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:33:56,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:56,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:56,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:57,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:57,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 10:33:57,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:33:57,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 965 [2020-10-13 10:33:57,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:57,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 10:33:57,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 10:33:57,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 10:33:57,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:57,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:33:57,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:57,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:57,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:57,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:33:57,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:57,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:33:57,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:57,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:33:57,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:33:57,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:33:57,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:57,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-13 10:33:57,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:57,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:57,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:57,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 10:33:57,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:57,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-13 10:33:57,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:57,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:33:57,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:33:57,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 10:33:57,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:58,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-13 10:33:58,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:58,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:58,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:33:58,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-13 10:33:58,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:33:58,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-13 10:33:58,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:33:58,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:33:58,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:33:58,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 10:33:58,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:33:58,253 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-13 10:33:58,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [565270131] [2020-10-13 10:33:58,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:33:58,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 10:33:58,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774393255] [2020-10-13 10:33:58,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 10:33:58,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:33:58,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 10:33:58,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=380, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:33:58,255 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand 21 states. [2020-10-13 10:33:59,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:33:59,012 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2020-10-13 10:33:59,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 10:33:59,013 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 54 [2020-10-13 10:33:59,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:33:59,014 INFO L225 Difference]: With dead ends: 77 [2020-10-13 10:33:59,014 INFO L226 Difference]: Without dead ends: 73 [2020-10-13 10:33:59,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 10:33:59,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-13 10:33:59,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 67. [2020-10-13 10:33:59,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-13 10:33:59,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 76 transitions. [2020-10-13 10:33:59,025 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 76 transitions. Word has length 54 [2020-10-13 10:33:59,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:33:59,025 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 76 transitions. [2020-10-13 10:33:59,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 10:33:59,026 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 76 transitions. [2020-10-13 10:33:59,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 10:33:59,026 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:33:59,026 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:33:59,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 10:33:59,027 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:33:59,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:33:59,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1142857076, now seen corresponding path program 12 times [2020-10-13 10:33:59,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:33:59,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [213494979] [2020-10-13 10:33:59,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:33:59,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:33:59,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:33:59,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:34:00,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:34:00,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 10:34:00,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:34:00,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1456 [2020-10-13 10:34:00,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:34:00,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 10:34:00,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 10:34:00,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 10:34:00,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:34:00,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:34:00,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:34:00,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:34:00,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:34:00,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:34:00,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:34:00,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:34:00,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:34:00,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:34:00,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:34:00,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:34:00,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:34:00,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-13 10:34:00,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:34:00,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:34:00,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:34:00,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 10:34:00,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:34:00,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 181 [2020-10-13 10:34:00,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:34:00,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 10:34:00,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:34:00,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 10:34:00,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:34:01,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-13 10:34:01,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:34:01,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:34:01,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:34:01,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 10:34:01,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:34:01,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-13 10:34:01,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:34:01,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:34:01,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 10:34:01,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 10:34:01,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:34:01,711 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-13 10:34:01,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [213494979] [2020-10-13 10:34:01,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:34:01,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 10:34:01,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625062643] [2020-10-13 10:34:01,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 10:34:01,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:34:01,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 10:34:01,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=552, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:34:01,713 INFO L87 Difference]: Start difference. First operand 67 states and 76 transitions. Second operand 25 states. [2020-10-13 10:34:03,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:34:03,501 INFO L93 Difference]: Finished difference Result 73 states and 81 transitions. [2020-10-13 10:34:03,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 10:34:03,501 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 55 [2020-10-13 10:34:03,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:34:03,502 INFO L225 Difference]: With dead ends: 73 [2020-10-13 10:34:03,503 INFO L226 Difference]: Without dead ends: 64 [2020-10-13 10:34:03,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=120, Invalid=1362, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 10:34:03,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-13 10:34:03,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2020-10-13 10:34:03,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-13 10:34:03,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2020-10-13 10:34:03,512 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 55 [2020-10-13 10:34:03,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:34:03,512 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2020-10-13 10:34:03,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 10:34:03,512 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2020-10-13 10:34:03,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 10:34:03,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:34:03,513 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:34:03,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 10:34:03,513 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:34:03,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:34:03,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1554163449, now seen corresponding path program 13 times [2020-10-13 10:34:03,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:34:03,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [969467632] [2020-10-13 10:34:03,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:34:03,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:34:03,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:34:03,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:34:04,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:34:05,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:34:08,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:34:08,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 10:34:08,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:34:08,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 10:34:08,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:34:08,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 10:34:08,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 10:34:08,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 10:34:08,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0