/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 --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=LOWLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/heap-manipulation/dll_of_dll-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 18:09:10,561 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 18:09:10,564 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 18:09:10,606 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 18:09:10,607 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 18:09:10,616 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 18:09:10,619 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 18:09:10,622 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 18:09:10,625 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 18:09:10,629 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 18:09:10,630 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 18:09:10,631 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 18:09:10,631 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 18:09:10,634 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 18:09:10,636 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 18:09:10,638 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 18:09:10,640 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 18:09:10,641 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 18:09:10,642 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 18:09:10,650 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 18:09:10,652 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 18:09:10,653 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 18:09:10,654 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 18:09:10,655 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 18:09:10,667 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 18:09:10,668 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 18:09:10,668 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 18:09:10,674 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 18:09:10,675 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 18:09:10,675 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 18:09:10,676 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 18:09:10,676 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 18:09:10,681 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 18:09:10,682 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 18:09:10,684 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 18:09:10,685 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 18:09:10,685 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 18:09:10,685 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 18:09:10,686 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 18:09:10,687 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 18:09:10,688 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 18:09:10,688 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 [2020-08-21 18:09:10,727 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 18:09:10,727 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 18:09:10,729 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 18:09:10,729 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 18:09:10,730 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 18:09:10,730 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 18:09:10,730 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 18:09:10,730 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 18:09:10,731 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 18:09:10,731 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 18:09:10,732 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 18:09:10,732 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 18:09:10,732 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 18:09:10,733 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 18:09:10,733 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 18:09:10,733 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 18:09:10,733 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 18:09:10,733 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 18:09:10,733 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 18:09:10,734 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 18:09:10,734 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 18:09:10,734 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 18:09:10,734 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 18:09:10,734 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 18:09:10,735 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 18:09:10,735 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 18:09:10,735 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 18:09:10,735 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 18:09:10,735 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 18:09:10,735 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.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; [2020-08-21 18:09:11,028 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 18:09:11,041 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 18:09:11,045 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 18:09:11,047 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 18:09:11,047 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 18:09:11,048 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/dll_of_dll-1.i [2020-08-21 18:09:11,105 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9b6161b94/144c638430c242d39fe3c3dc5d62501e/FLAG1c79a22fa [2020-08-21 18:09:11,622 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 18:09:11,623 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/heap-manipulation/dll_of_dll-1.i [2020-08-21 18:09:11,637 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9b6161b94/144c638430c242d39fe3c3dc5d62501e/FLAG1c79a22fa [2020-08-21 18:09:11,883 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9b6161b94/144c638430c242d39fe3c3dc5d62501e [2020-08-21 18:09:11,892 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 18:09:11,893 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 18:09:11,894 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 18:09:11,895 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 18:09:11,898 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 18:09:11,899 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:09:11" (1/1) ... [2020-08-21 18:09:11,903 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b305016 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:11, skipping insertion in model container [2020-08-21 18:09:11,903 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:09:11" (1/1) ... [2020-08-21 18:09:11,911 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 18:09:11,971 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 18:09:12,464 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:09:12,472 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 18:09:12,530 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:09:12,605 INFO L208 MainTranslator]: Completed translation [2020-08-21 18:09:12,607 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:12 WrapperNode [2020-08-21 18:09:12,607 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 18:09:12,611 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 18:09:12,611 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 18:09:12,611 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 18:09:12,622 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:12" (1/1) ... [2020-08-21 18:09:12,622 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:12" (1/1) ... [2020-08-21 18:09:12,642 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:12" (1/1) ... [2020-08-21 18:09:12,643 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:12" (1/1) ... [2020-08-21 18:09:12,671 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:12" (1/1) ... [2020-08-21 18:09:12,692 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:12" (1/1) ... [2020-08-21 18:09:12,702 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:12" (1/1) ... [2020-08-21 18:09:12,711 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 18:09:12,712 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 18:09:12,712 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 18:09:12,712 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 18:09:12,720 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:12" (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 [2020-08-21 18:09:12,778 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 18:09:12,778 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 18:09:12,778 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2020-08-21 18:09:12,779 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-08-21 18:09:12,779 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-08-21 18:09:12,779 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2020-08-21 18:09:12,779 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_or_die_slave [2020-08-21 18:09:12,779 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_or_die_master [2020-08-21 18:09:12,779 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_insert_slave [2020-08-21 18:09:12,780 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create_generic [2020-08-21 18:09:12,780 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create_slave [2020-08-21 18:09:12,780 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy_slave [2020-08-21 18:09:12,780 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy_nested_lists [2020-08-21 18:09:12,780 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_reinit_nested_lists [2020-08-21 18:09:12,780 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy_master [2020-08-21 18:09:12,781 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_insert_master [2020-08-21 18:09:12,781 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create_master [2020-08-21 18:09:12,781 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_base [2020-08-21 18:09:12,781 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_full [2020-08-21 18:09:12,781 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_dangling [2020-08-21 18:09:12,781 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_init [2020-08-21 18:09:12,782 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 18:09:12,782 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 18:09:12,782 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-21 18:09:12,782 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-21 18:09:12,782 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-21 18:09:12,783 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-21 18:09:12,783 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-21 18:09:12,783 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-21 18:09:12,783 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-21 18:09:12,783 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-21 18:09:12,783 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-21 18:09:12,784 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-21 18:09:12,784 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-21 18:09:12,784 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-21 18:09:12,784 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-21 18:09:12,784 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-21 18:09:12,784 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-21 18:09:12,785 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-21 18:09:12,785 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-08-21 18:09:12,785 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-08-21 18:09:12,785 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-21 18:09:12,785 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-21 18:09:12,785 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-21 18:09:12,785 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-21 18:09:12,786 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-21 18:09:12,786 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-21 18:09:12,786 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-21 18:09:12,786 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-21 18:09:12,786 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-21 18:09:12,786 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-21 18:09:12,787 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-21 18:09:12,787 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-21 18:09:12,787 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-21 18:09:12,787 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-21 18:09:12,787 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-21 18:09:12,787 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-21 18:09:12,788 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-21 18:09:12,788 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-21 18:09:12,788 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-21 18:09:12,788 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-21 18:09:12,788 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-21 18:09:12,788 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-21 18:09:12,788 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-21 18:09:12,789 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-21 18:09:12,789 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-21 18:09:12,789 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-21 18:09:12,789 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-21 18:09:12,789 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-21 18:09:12,789 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-21 18:09:12,790 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-21 18:09:12,790 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-21 18:09:12,790 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-21 18:09:12,790 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-21 18:09:12,790 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-21 18:09:12,790 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 18:09:12,791 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-21 18:09:12,791 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-21 18:09:12,791 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-21 18:09:12,791 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-21 18:09:12,791 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-21 18:09:12,791 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-21 18:09:12,792 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-21 18:09:12,792 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-08-21 18:09:12,792 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 18:09:12,792 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-21 18:09:12,792 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-08-21 18:09:12,792 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-21 18:09:12,792 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-21 18:09:12,793 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-08-21 18:09:12,793 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-21 18:09:12,793 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-21 18:09:12,793 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-21 18:09:12,793 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-21 18:09:12,793 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-21 18:09:12,793 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-21 18:09:12,794 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-21 18:09:12,794 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-21 18:09:12,794 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-21 18:09:12,794 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-21 18:09:12,794 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-21 18:09:12,794 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-21 18:09:12,794 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-21 18:09:12,794 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-21 18:09:12,795 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-21 18:09:12,795 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-21 18:09:12,795 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-21 18:09:12,795 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-21 18:09:12,795 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-21 18:09:12,795 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-21 18:09:12,795 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-21 18:09:12,796 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-21 18:09:12,796 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-21 18:09:12,796 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-21 18:09:12,796 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-21 18:09:12,796 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-21 18:09:12,796 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-21 18:09:12,796 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-21 18:09:12,797 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-21 18:09:12,797 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-21 18:09:12,797 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-21 18:09:12,797 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-21 18:09:12,797 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-21 18:09:12,797 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-21 18:09:12,798 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-21 18:09:12,798 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-21 18:09:12,798 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-21 18:09:12,798 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-21 18:09:12,798 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 18:09:12,798 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2020-08-21 18:09:12,799 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_or_die_slave [2020-08-21 18:09:12,799 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 18:09:12,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-21 18:09:12,799 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_or_die_master [2020-08-21 18:09:12,799 INFO L130 BoogieDeclarations]: Found specification of procedure dll_insert_slave [2020-08-21 18:09:12,799 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-21 18:09:12,799 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create_generic [2020-08-21 18:09:12,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 18:09:12,800 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2020-08-21 18:09:12,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-08-21 18:09:12,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 18:09:12,800 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create_slave [2020-08-21 18:09:12,800 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy_slave [2020-08-21 18:09:12,801 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy_nested_lists [2020-08-21 18:09:12,801 INFO L130 BoogieDeclarations]: Found specification of procedure dll_reinit_nested_lists [2020-08-21 18:09:12,801 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy_master [2020-08-21 18:09:12,801 INFO L130 BoogieDeclarations]: Found specification of procedure dll_insert_master [2020-08-21 18:09:12,801 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create_master [2020-08-21 18:09:12,801 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_base [2020-08-21 18:09:12,801 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_full [2020-08-21 18:09:12,802 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_dangling [2020-08-21 18:09:12,802 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_init [2020-08-21 18:09:12,802 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 18:09:12,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 18:09:12,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 18:09:13,668 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 18:09:13,669 INFO L295 CfgBuilder]: Removed 38 assume(true) statements. [2020-08-21 18:09:13,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:09:13 BoogieIcfgContainer [2020-08-21 18:09:13,674 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 18:09:13,675 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 18:09:13,676 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 18:09:13,679 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 18:09:13,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 06:09:11" (1/3) ... [2020-08-21 18:09:13,680 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e543e22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:09:13, skipping insertion in model container [2020-08-21 18:09:13,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:09:12" (2/3) ... [2020-08-21 18:09:13,680 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e543e22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:09:13, skipping insertion in model container [2020-08-21 18:09:13,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:09:13" (3/3) ... [2020-08-21 18:09:13,682 INFO L109 eAbstractionObserver]: Analyzing ICFG dll_of_dll-1.i [2020-08-21 18:09:13,693 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 18:09:13,701 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 18:09:13,715 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 18:09:13,741 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 18:09:13,741 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 18:09:13,741 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 18:09:13,742 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 18:09:13,742 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 18:09:13,742 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 18:09:13,742 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 18:09:13,742 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 18:09:13,766 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states. [2020-08-21 18:09:13,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-21 18:09:13,775 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:13,776 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:09:13,777 INFO L427 AbstractCegarLoop]: === Iteration 1 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:13,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:13,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1405399524, now seen corresponding path program 1 times [2020-08-21 18:09:13,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:13,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1407676998] [2020-08-21 18:09:13,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:13,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:14,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:14,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:14,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:09:14,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:14,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:14,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:14,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:14,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:14,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:09:14,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:14,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:14,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:14,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 18:09:14,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:14,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:09:14,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:14,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:14,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:14,349 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-08-21 18:09:14,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1407676998] [2020-08-21 18:09:14,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:09:14,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 18:09:14,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414457211] [2020-08-21 18:09:14,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 18:09:14,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:14,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 18:09:14,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 18:09:14,379 INFO L87 Difference]: Start difference. First operand 169 states. Second operand 4 states. [2020-08-21 18:09:14,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:14,838 INFO L93 Difference]: Finished difference Result 343 states and 542 transitions. [2020-08-21 18:09:14,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 18:09:14,840 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 59 [2020-08-21 18:09:14,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:14,855 INFO L225 Difference]: With dead ends: 343 [2020-08-21 18:09:14,856 INFO L226 Difference]: Without dead ends: 166 [2020-08-21 18:09:14,863 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-21 18:09:14,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-08-21 18:09:14,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 155. [2020-08-21 18:09:14,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-08-21 18:09:14,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 184 transitions. [2020-08-21 18:09:14,936 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 184 transitions. Word has length 59 [2020-08-21 18:09:14,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:14,937 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 184 transitions. [2020-08-21 18:09:14,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 18:09:14,937 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 184 transitions. [2020-08-21 18:09:14,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-21 18:09:14,941 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:14,941 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:09:14,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 18:09:14,942 INFO L427 AbstractCegarLoop]: === Iteration 2 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:14,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:14,943 INFO L82 PathProgramCache]: Analyzing trace with hash 747676979, now seen corresponding path program 1 times [2020-08-21 18:09:14,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:14,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1980783187] [2020-08-21 18:09:14,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:15,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:15,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:15,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:15,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:09:15,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:15,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:15,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:15,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:15,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:15,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:09:15,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:15,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:15,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:15,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 18:09:15,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:15,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:09:15,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:15,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:15,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:15,398 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-08-21 18:09:15,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1980783187] [2020-08-21 18:09:15,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:09:15,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 18:09:15,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930932066] [2020-08-21 18:09:15,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 18:09:15,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:15,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 18:09:15,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-08-21 18:09:15,402 INFO L87 Difference]: Start difference. First operand 155 states and 184 transitions. Second operand 13 states. [2020-08-21 18:09:16,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:16,590 INFO L93 Difference]: Finished difference Result 327 states and 406 transitions. [2020-08-21 18:09:16,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 18:09:16,590 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 60 [2020-08-21 18:09:16,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:16,593 INFO L225 Difference]: With dead ends: 327 [2020-08-21 18:09:16,593 INFO L226 Difference]: Without dead ends: 179 [2020-08-21 18:09:16,595 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2020-08-21 18:09:16,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-08-21 18:09:16,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 168. [2020-08-21 18:09:16,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-21 18:09:16,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 199 transitions. [2020-08-21 18:09:16,622 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 199 transitions. Word has length 60 [2020-08-21 18:09:16,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:16,622 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 199 transitions. [2020-08-21 18:09:16,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 18:09:16,623 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 199 transitions. [2020-08-21 18:09:16,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-08-21 18:09:16,628 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:16,628 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:09:16,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 18:09:16,628 INFO L427 AbstractCegarLoop]: === Iteration 3 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:16,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:16,629 INFO L82 PathProgramCache]: Analyzing trace with hash 586330229, now seen corresponding path program 1 times [2020-08-21 18:09:16,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:16,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [106853318] [2020-08-21 18:09:16,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:16,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:16,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:16,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:16,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:09:16,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:16,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:17,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:17,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:17,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:17,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:09:17,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:17,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:17,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:17,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 18:09:17,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:17,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:17,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:17,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:17,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:17,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:09:17,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:17,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:17,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:17,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 18:09:17,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:17,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:09:17,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:17,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:17,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:18,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-21 18:09:18,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:18,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:09:18,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:18,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:18,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:18,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 18:09:18,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:18,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:18,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:18,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:18,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:18,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:09:18,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:18,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:18,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:18,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 18:09:18,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:18,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:09:18,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:18,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:18,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:18,503 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 16 proven. 93 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-08-21 18:09:18,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [106853318] [2020-08-21 18:09:18,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:09:18,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-21 18:09:18,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199772976] [2020-08-21 18:09:18,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-21 18:09:18,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:18,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-21 18:09:18,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=693, Unknown=0, NotChecked=0, Total=756 [2020-08-21 18:09:18,509 INFO L87 Difference]: Start difference. First operand 168 states and 199 transitions. Second operand 28 states. [2020-08-21 18:09:21,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:21,639 INFO L93 Difference]: Finished difference Result 348 states and 425 transitions. [2020-08-21 18:09:21,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-21 18:09:21,639 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 154 [2020-08-21 18:09:21,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:21,644 INFO L225 Difference]: With dead ends: 348 [2020-08-21 18:09:21,644 INFO L226 Difference]: Without dead ends: 189 [2020-08-21 18:09:21,646 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=182, Invalid=1798, Unknown=0, NotChecked=0, Total=1980 [2020-08-21 18:09:21,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-08-21 18:09:21,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 176. [2020-08-21 18:09:21,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-08-21 18:09:21,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 208 transitions. [2020-08-21 18:09:21,667 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 208 transitions. Word has length 154 [2020-08-21 18:09:21,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:21,668 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 208 transitions. [2020-08-21 18:09:21,668 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-21 18:09:21,668 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 208 transitions. [2020-08-21 18:09:21,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-08-21 18:09:21,671 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:21,672 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:09:21,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 18:09:21,672 INFO L427 AbstractCegarLoop]: === Iteration 4 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:21,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:21,672 INFO L82 PathProgramCache]: Analyzing trace with hash -467161035, now seen corresponding path program 1 times [2020-08-21 18:09:21,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:21,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1138416424] [2020-08-21 18:09:21,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:21,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:21,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:21,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:21,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:09:21,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:21,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:22,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:22,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:22,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:22,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:09:22,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:22,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:22,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:22,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 18:09:22,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:22,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:22,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:22,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:22,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:22,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:09:22,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:22,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:22,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:22,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 18:09:22,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:22,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:09:22,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:22,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:22,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:22,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-21 18:09:22,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:22,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:09:22,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:22,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:22,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:22,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 18:09:22,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:22,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:22,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:22,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:22,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:22,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:09:22,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:22,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:22,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:22,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 18:09:22,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:22,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:09:22,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:22,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:22,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:23,003 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2020-08-21 18:09:23,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1138416424] [2020-08-21 18:09:23,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:09:23,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-21 18:09:23,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093688507] [2020-08-21 18:09:23,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-21 18:09:23,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:23,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-21 18:09:23,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2020-08-21 18:09:23,008 INFO L87 Difference]: Start difference. First operand 176 states and 208 transitions. Second operand 19 states. [2020-08-21 18:09:25,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:25,328 INFO L93 Difference]: Finished difference Result 360 states and 431 transitions. [2020-08-21 18:09:25,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 18:09:25,329 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 154 [2020-08-21 18:09:25,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:25,331 INFO L225 Difference]: With dead ends: 360 [2020-08-21 18:09:25,336 INFO L226 Difference]: Without dead ends: 193 [2020-08-21 18:09:25,338 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2020-08-21 18:09:25,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-08-21 18:09:25,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 182. [2020-08-21 18:09:25,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-08-21 18:09:25,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 216 transitions. [2020-08-21 18:09:25,369 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 216 transitions. Word has length 154 [2020-08-21 18:09:25,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:25,369 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 216 transitions. [2020-08-21 18:09:25,370 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-21 18:09:25,370 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 216 transitions. [2020-08-21 18:09:25,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-08-21 18:09:25,372 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:25,373 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:09:25,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 18:09:25,373 INFO L427 AbstractCegarLoop]: === Iteration 5 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:25,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:25,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1717739637, now seen corresponding path program 1 times [2020-08-21 18:09:25,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:25,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [655400506] [2020-08-21 18:09:25,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:25,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:25,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:25,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:25,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:09:25,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:25,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:25,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:25,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:25,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:25,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:09:25,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:25,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:25,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:25,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 18:09:26,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:26,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:26,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:26,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:26,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:26,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:09:26,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:26,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:26,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:26,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 18:09:26,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:26,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:09:26,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:26,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:26,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:26,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-21 18:09:26,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:26,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:09:26,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:26,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:26,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:26,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 18:09:26,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:26,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:26,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:26,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:26,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:26,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:09:26,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:26,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:26,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:26,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 18:09:26,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:26,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:09:26,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:26,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:26,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:26,885 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 28 proven. 25 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2020-08-21 18:09:26,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [655400506] [2020-08-21 18:09:26,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:09:26,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-21 18:09:26,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245152919] [2020-08-21 18:09:26,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-21 18:09:26,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:26,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-21 18:09:26,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=693, Unknown=0, NotChecked=0, Total=756 [2020-08-21 18:09:26,892 INFO L87 Difference]: Start difference. First operand 182 states and 216 transitions. Second operand 28 states. [2020-08-21 18:09:29,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:29,717 INFO L93 Difference]: Finished difference Result 371 states and 447 transitions. [2020-08-21 18:09:29,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-21 18:09:29,717 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 154 [2020-08-21 18:09:29,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:29,721 INFO L225 Difference]: With dead ends: 371 [2020-08-21 18:09:29,722 INFO L226 Difference]: Without dead ends: 198 [2020-08-21 18:09:29,724 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=182, Invalid=1798, Unknown=0, NotChecked=0, Total=1980 [2020-08-21 18:09:29,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-08-21 18:09:29,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 185. [2020-08-21 18:09:29,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-08-21 18:09:29,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 217 transitions. [2020-08-21 18:09:29,744 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 217 transitions. Word has length 154 [2020-08-21 18:09:29,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:29,744 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 217 transitions. [2020-08-21 18:09:29,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-21 18:09:29,745 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 217 transitions. [2020-08-21 18:09:29,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-08-21 18:09:29,747 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:29,747 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:09:29,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 18:09:29,748 INFO L427 AbstractCegarLoop]: === Iteration 6 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:29,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:29,748 INFO L82 PathProgramCache]: Analyzing trace with hash -2084601485, now seen corresponding path program 1 times [2020-08-21 18:09:29,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:29,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [498882228] [2020-08-21 18:09:29,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:29,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:29,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:29,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:29,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:09:29,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:30,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:30,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:30,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:30,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:30,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:09:30,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:30,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:30,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:30,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 18:09:30,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:30,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:30,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:30,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:30,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:30,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:09:30,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:30,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:30,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:30,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 18:09:30,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:30,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:09:30,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:30,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:30,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:30,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-21 18:09:30,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:30,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:09:30,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:30,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:30,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:30,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 18:09:30,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:30,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:30,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:30,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:30,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:30,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:09:30,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:30,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:30,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:30,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 18:09:30,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:30,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:09:30,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:30,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:30,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:31,162 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2020-08-21 18:09:31,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [498882228] [2020-08-21 18:09:31,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:09:31,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-21 18:09:31,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121353753] [2020-08-21 18:09:31,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-21 18:09:31,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:09:31,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-21 18:09:31,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2020-08-21 18:09:31,167 INFO L87 Difference]: Start difference. First operand 185 states and 217 transitions. Second operand 22 states. [2020-08-21 18:09:33,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:09:33,578 INFO L93 Difference]: Finished difference Result 323 states and 388 transitions. [2020-08-21 18:09:33,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-21 18:09:33,579 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 154 [2020-08-21 18:09:33,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:09:33,585 INFO L225 Difference]: With dead ends: 323 [2020-08-21 18:09:33,586 INFO L226 Difference]: Without dead ends: 254 [2020-08-21 18:09:33,588 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=131, Invalid=1129, Unknown=0, NotChecked=0, Total=1260 [2020-08-21 18:09:33,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-08-21 18:09:33,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 209. [2020-08-21 18:09:33,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-08-21 18:09:33,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 246 transitions. [2020-08-21 18:09:33,623 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 246 transitions. Word has length 154 [2020-08-21 18:09:33,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:09:33,626 INFO L479 AbstractCegarLoop]: Abstraction has 209 states and 246 transitions. [2020-08-21 18:09:33,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-21 18:09:33,627 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 246 transitions. [2020-08-21 18:09:33,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-08-21 18:09:33,637 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:09:33,638 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:09:33,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 18:09:33,638 INFO L427 AbstractCegarLoop]: === Iteration 7 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:09:33,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:09:33,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1709746076, now seen corresponding path program 1 times [2020-08-21 18:09:33,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:09:33,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [41875831] [2020-08-21 18:09:33,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:09:33,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:33,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:33,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:33,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:09:34,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:34,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:34,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:34,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:34,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:34,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:09:34,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:34,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:34,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:35,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 18:09:35,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:35,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:35,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:35,965 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 24 [2020-08-21 18:09:36,726 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 20 [2020-08-21 18:09:37,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:37,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:37,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:09:37,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:37,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:37,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:37,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-21 18:09:37,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:37,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:09:37,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:37,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:37,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:38,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-21 18:09:38,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:38,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:09:38,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:39,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-08-21 18:09:39,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:39,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 18:09:39,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:09:40,244 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-08-21 18:09:40,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:09:40,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat