./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/substring-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 906a4fb5 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/substring-alloca-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6e748b563bb7a11726b28f7957ce1a00b7c8807b ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/substring-alloca-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6e748b563bb7a11726b28f7957ce1a00b7c8807b ............................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.1.25-906a4fb [2020-10-19 17:58:58,623 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 17:58:58,626 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 17:58:58,651 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 17:58:58,651 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 17:58:58,652 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 17:58:58,654 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 17:58:58,656 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 17:58:58,658 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 17:58:58,659 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 17:58:58,661 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 17:58:58,662 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 17:58:58,663 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 17:58:58,664 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 17:58:58,665 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 17:58:58,667 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 17:58:58,668 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 17:58:58,669 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 17:58:58,671 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 17:58:58,674 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 17:58:58,676 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 17:58:58,677 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 17:58:58,679 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 17:58:58,680 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 17:58:58,683 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 17:58:58,683 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 17:58:58,684 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 17:58:58,685 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 17:58:58,685 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 17:58:58,686 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 17:58:58,687 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 17:58:58,688 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 17:58:58,689 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 17:58:58,690 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 17:58:58,691 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 17:58:58,692 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 17:58:58,692 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 17:58:58,693 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 17:58:58,693 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 17:58:58,694 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 17:58:58,695 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 17:58:58,696 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-10-19 17:58:58,727 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 17:58:58,728 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 17:58:58,729 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 17:58:58,729 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 17:58:58,730 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 17:58:58,730 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 17:58:58,730 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 17:58:58,731 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-19 17:58:58,731 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 17:58:58,731 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 17:58:58,731 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 17:58:58,732 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-10-19 17:58:58,732 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-10-19 17:58:58,732 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-10-19 17:58:58,732 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 17:58:58,733 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-10-19 17:58:58,733 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 17:58:58,733 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 17:58:58,734 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 17:58:58,734 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 17:58:58,734 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 17:58:58,734 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 17:58:58,735 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 17:58:58,735 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 17:58:58,735 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 17:58:58,736 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 17:58:58,736 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-19 17:58:58,736 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 17:58:58,736 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6e748b563bb7a11726b28f7957ce1a00b7c8807b [2020-10-19 17:58:59,065 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 17:58:59,078 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 17:58:59,081 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 17:58:59,083 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 17:58:59,083 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 17:58:59,084 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/substring-alloca-2.i [2020-10-19 17:58:59,137 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a67a7cb2/77c214d37785400bac67588d46fe121a/FLAGd0835ef71 [2020-10-19 17:58:59,719 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 17:58:59,720 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/substring-alloca-2.i [2020-10-19 17:58:59,734 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a67a7cb2/77c214d37785400bac67588d46fe121a/FLAGd0835ef71 [2020-10-19 17:58:59,999 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a67a7cb2/77c214d37785400bac67588d46fe121a [2020-10-19 17:59:00,005 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 17:59:00,014 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-19 17:59:00,017 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 17:59:00,018 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 17:59:00,022 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 17:59:00,023 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 05:59:00" (1/1) ... [2020-10-19 17:59:00,027 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a2f2b2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:59:00, skipping insertion in model container [2020-10-19 17:59:00,027 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 05:59:00" (1/1) ... [2020-10-19 17:59:00,037 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 17:59:00,099 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 17:59:00,550 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 17:59:00,562 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 17:59:00,606 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 17:59:00,659 INFO L208 MainTranslator]: Completed translation [2020-10-19 17:59:00,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:59:00 WrapperNode [2020-10-19 17:59:00,660 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 17:59:00,661 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 17:59:00,661 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 17:59:00,662 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 17:59:00,676 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:59:00" (1/1) ... [2020-10-19 17:59:00,676 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:59:00" (1/1) ... [2020-10-19 17:59:00,692 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:59:00" (1/1) ... [2020-10-19 17:59:00,692 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:59:00" (1/1) ... [2020-10-19 17:59:00,710 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:59:00" (1/1) ... [2020-10-19 17:59:00,717 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:59:00" (1/1) ... [2020-10-19 17:59:00,720 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:59:00" (1/1) ... [2020-10-19 17:59:00,727 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 17:59:00,728 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 17:59:00,728 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 17:59:00,728 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 17:59:00,729 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:59:00" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 17:59:00,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-19 17:59:00,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 17:59:00,795 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-19 17:59:00,796 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-19 17:59:00,797 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-10-19 17:59:00,797 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-10-19 17:59:00,798 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-10-19 17:59:00,799 INFO L138 BoogieDeclarations]: Found implementation of procedure substring [2020-10-19 17:59:00,800 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-19 17:59:00,800 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-19 17:59:00,801 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-19 17:59:00,802 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-19 17:59:00,802 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-19 17:59:00,802 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-19 17:59:00,802 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-19 17:59:00,802 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-19 17:59:00,805 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-19 17:59:00,805 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-19 17:59:00,806 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-19 17:59:00,806 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-19 17:59:00,806 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-19 17:59:00,807 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-19 17:59:00,807 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-19 17:59:00,807 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-19 17:59:00,807 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-19 17:59:00,808 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-19 17:59:00,808 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-19 17:59:00,808 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-10-19 17:59:00,809 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-10-19 17:59:00,809 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-10-19 17:59:00,809 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-19 17:59:00,809 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-19 17:59:00,810 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-19 17:59:00,810 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-19 17:59:00,810 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-19 17:59:00,810 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-19 17:59:00,811 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-19 17:59:00,811 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-19 17:59:00,811 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-19 17:59:00,811 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-19 17:59:00,812 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-19 17:59:00,812 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-19 17:59:00,812 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-19 17:59:00,812 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-19 17:59:00,812 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-19 17:59:00,813 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-19 17:59:00,813 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-19 17:59:00,813 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-19 17:59:00,813 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-19 17:59:00,813 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-19 17:59:00,814 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-19 17:59:00,814 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-19 17:59:00,814 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-19 17:59:00,814 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-19 17:59:00,815 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-19 17:59:00,815 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-19 17:59:00,815 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-19 17:59:00,815 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-19 17:59:00,816 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-19 17:59:00,816 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-19 17:59:00,816 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-19 17:59:00,816 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-19 17:59:00,816 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-19 17:59:00,817 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-19 17:59:00,817 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-19 17:59:00,817 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-19 17:59:00,817 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-19 17:59:00,817 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-19 17:59:00,818 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-19 17:59:00,818 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-19 17:59:00,818 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-19 17:59:00,818 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-19 17:59:00,819 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-19 17:59:00,819 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-19 17:59:00,819 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-19 17:59:00,819 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-19 17:59:00,819 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-19 17:59:00,820 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-19 17:59:00,820 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-19 17:59:00,820 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-19 17:59:00,820 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-19 17:59:00,821 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-19 17:59:00,821 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-19 17:59:00,821 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-19 17:59:00,821 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-19 17:59:00,821 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-19 17:59:00,822 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-19 17:59:00,822 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-19 17:59:00,822 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-19 17:59:00,822 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-19 17:59:00,822 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-19 17:59:00,823 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-19 17:59:00,823 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-19 17:59:00,823 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-19 17:59:00,823 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-19 17:59:00,823 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-19 17:59:00,824 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-19 17:59:00,824 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-19 17:59:00,824 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-19 17:59:00,824 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-19 17:59:00,824 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-19 17:59:00,825 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-19 17:59:00,825 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-19 17:59:00,825 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-19 17:59:00,825 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-19 17:59:00,825 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-19 17:59:00,826 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-19 17:59:00,826 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-19 17:59:00,826 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-19 17:59:00,826 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-19 17:59:00,826 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-19 17:59:00,827 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-19 17:59:00,827 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-19 17:59:00,827 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-19 17:59:00,827 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-19 17:59:00,828 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-19 17:59:00,828 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-19 17:59:00,828 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-19 17:59:00,828 INFO L130 BoogieDeclarations]: Found specification of procedure substring [2020-10-19 17:59:00,829 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-19 17:59:00,829 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-19 17:59:00,829 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 17:59:00,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-19 17:59:00,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-19 17:59:00,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-19 17:59:00,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 17:59:01,352 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 17:59:01,353 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-19 17:59:01,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 05:59:01 BoogieIcfgContainer [2020-10-19 17:59:01,355 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 17:59:01,357 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 17:59:01,357 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 17:59:01,360 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 17:59:01,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 05:59:00" (1/3) ... [2020-10-19 17:59:01,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b3b5844 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 05:59:01, skipping insertion in model container [2020-10-19 17:59:01,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:59:00" (2/3) ... [2020-10-19 17:59:01,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b3b5844 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 05:59:01, skipping insertion in model container [2020-10-19 17:59:01,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 05:59:01" (3/3) ... [2020-10-19 17:59:01,365 INFO L111 eAbstractionObserver]: Analyzing ICFG substring-alloca-2.i [2020-10-19 17:59:01,376 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 17:59:01,384 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 19 error locations. [2020-10-19 17:59:01,398 INFO L253 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2020-10-19 17:59:01,420 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 17:59:01,420 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-19 17:59:01,421 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 17:59:01,421 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 17:59:01,421 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 17:59:01,422 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 17:59:01,422 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 17:59:01,422 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 17:59:01,440 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states. [2020-10-19 17:59:01,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-19 17:59:01,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:01,451 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:59:01,452 INFO L429 AbstractCegarLoop]: === Iteration 1 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, substringErr9REQUIRES_VIOLATION, substringErr4REQUIRES_VIOLATION, substringErr2REQUIRES_VIOLATION, substringErr3REQUIRES_VIOLATION, substringErr8REQUIRES_VIOLATION, substringErr1REQUIRES_VIOLATION, substringErr6REQUIRES_VIOLATION, substringErr7REQUIRES_VIOLATION, substringErr5REQUIRES_VIOLATION, substringErr0REQUIRES_VIOLATION]=== [2020-10-19 17:59:01,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:01,458 INFO L82 PathProgramCache]: Analyzing trace with hash -391744755, now seen corresponding path program 1 times [2020-10-19 17:59:01,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:01,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189214909] [2020-10-19 17:59:01,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:01,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:01,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:01,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:01,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:01,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189214909] [2020-10-19 17:59:01,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 17:59:01,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-19 17:59:01,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485548656] [2020-10-19 17:59:01,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 17:59:01,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:01,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 17:59:01,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-19 17:59:01,719 INFO L87 Difference]: Start difference. First operand 60 states. Second operand 5 states. [2020-10-19 17:59:01,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:01,950 INFO L93 Difference]: Finished difference Result 81 states and 91 transitions. [2020-10-19 17:59:01,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 17:59:01,952 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-10-19 17:59:01,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:01,964 INFO L225 Difference]: With dead ends: 81 [2020-10-19 17:59:01,965 INFO L226 Difference]: Without dead ends: 77 [2020-10-19 17:59:01,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-19 17:59:01,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-19 17:59:02,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 60. [2020-10-19 17:59:02,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-19 17:59:02,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2020-10-19 17:59:02,015 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 11 [2020-10-19 17:59:02,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:02,016 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2020-10-19 17:59:02,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 17:59:02,016 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2020-10-19 17:59:02,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-19 17:59:02,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:02,017 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:59:02,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-19 17:59:02,018 INFO L429 AbstractCegarLoop]: === Iteration 2 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, substringErr9REQUIRES_VIOLATION, substringErr4REQUIRES_VIOLATION, substringErr2REQUIRES_VIOLATION, substringErr3REQUIRES_VIOLATION, substringErr8REQUIRES_VIOLATION, substringErr1REQUIRES_VIOLATION, substringErr6REQUIRES_VIOLATION, substringErr7REQUIRES_VIOLATION, substringErr5REQUIRES_VIOLATION, substringErr0REQUIRES_VIOLATION]=== [2020-10-19 17:59:02,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:02,018 INFO L82 PathProgramCache]: Analyzing trace with hash -389897713, now seen corresponding path program 1 times [2020-10-19 17:59:02,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:02,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717241838] [2020-10-19 17:59:02,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:02,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:02,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:02,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:02,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:02,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717241838] [2020-10-19 17:59:02,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 17:59:02,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 17:59:02,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742381158] [2020-10-19 17:59:02,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 17:59:02,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:02,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 17:59:02,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-19 17:59:02,175 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand 5 states. [2020-10-19 17:59:02,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:02,410 INFO L93 Difference]: Finished difference Result 82 states and 92 transitions. [2020-10-19 17:59:02,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 17:59:02,411 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-10-19 17:59:02,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:02,413 INFO L225 Difference]: With dead ends: 82 [2020-10-19 17:59:02,413 INFO L226 Difference]: Without dead ends: 82 [2020-10-19 17:59:02,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-19 17:59:02,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-19 17:59:02,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 62. [2020-10-19 17:59:02,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-19 17:59:02,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2020-10-19 17:59:02,425 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 11 [2020-10-19 17:59:02,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:02,425 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2020-10-19 17:59:02,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 17:59:02,426 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2020-10-19 17:59:02,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-19 17:59:02,427 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:02,427 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:59:02,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-19 17:59:02,428 INFO L429 AbstractCegarLoop]: === Iteration 3 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, substringErr9REQUIRES_VIOLATION, substringErr4REQUIRES_VIOLATION, substringErr2REQUIRES_VIOLATION, substringErr3REQUIRES_VIOLATION, substringErr8REQUIRES_VIOLATION, substringErr1REQUIRES_VIOLATION, substringErr6REQUIRES_VIOLATION, substringErr7REQUIRES_VIOLATION, substringErr5REQUIRES_VIOLATION, substringErr0REQUIRES_VIOLATION]=== [2020-10-19 17:59:02,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:02,428 INFO L82 PathProgramCache]: Analyzing trace with hash -389897714, now seen corresponding path program 1 times [2020-10-19 17:59:02,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:02,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433370657] [2020-10-19 17:59:02,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:02,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:02,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:02,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:02,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:02,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433370657] [2020-10-19 17:59:02,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 17:59:02,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 17:59:02,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927642422] [2020-10-19 17:59:02,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 17:59:02,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:02,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 17:59:02,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 17:59:02,534 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand 4 states. [2020-10-19 17:59:02,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:02,684 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2020-10-19 17:59:02,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 17:59:02,685 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-10-19 17:59:02,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:02,687 INFO L225 Difference]: With dead ends: 60 [2020-10-19 17:59:02,687 INFO L226 Difference]: Without dead ends: 60 [2020-10-19 17:59:02,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 17:59:02,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-19 17:59:02,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-19 17:59:02,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-19 17:59:02,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2020-10-19 17:59:02,702 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 11 [2020-10-19 17:59:02,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:02,703 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2020-10-19 17:59:02,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 17:59:02,703 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2020-10-19 17:59:02,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-19 17:59:02,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:02,712 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:59:02,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-19 17:59:02,713 INFO L429 AbstractCegarLoop]: === Iteration 4 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, substringErr9REQUIRES_VIOLATION, substringErr4REQUIRES_VIOLATION, substringErr2REQUIRES_VIOLATION, substringErr3REQUIRES_VIOLATION, substringErr8REQUIRES_VIOLATION, substringErr1REQUIRES_VIOLATION, substringErr6REQUIRES_VIOLATION, substringErr7REQUIRES_VIOLATION, substringErr5REQUIRES_VIOLATION, substringErr0REQUIRES_VIOLATION]=== [2020-10-19 17:59:02,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:02,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1490361092, now seen corresponding path program 1 times [2020-10-19 17:59:02,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:02,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175577554] [2020-10-19 17:59:02,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:02,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:02,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:02,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:02,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:02,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175577554] [2020-10-19 17:59:02,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 17:59:02,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 17:59:02,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220403405] [2020-10-19 17:59:02,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 17:59:02,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:02,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 17:59:02,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-19 17:59:02,794 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand 5 states. [2020-10-19 17:59:02,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:02,926 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2020-10-19 17:59:02,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 17:59:02,927 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-19 17:59:02,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:02,929 INFO L225 Difference]: With dead ends: 59 [2020-10-19 17:59:02,929 INFO L226 Difference]: Without dead ends: 59 [2020-10-19 17:59:02,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-19 17:59:02,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-19 17:59:02,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-19 17:59:02,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-19 17:59:02,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2020-10-19 17:59:02,937 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 13 [2020-10-19 17:59:02,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:02,937 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2020-10-19 17:59:02,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 17:59:02,938 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2020-10-19 17:59:02,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-19 17:59:02,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:02,939 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:59:02,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-19 17:59:02,940 INFO L429 AbstractCegarLoop]: === Iteration 5 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, substringErr9REQUIRES_VIOLATION, substringErr4REQUIRES_VIOLATION, substringErr2REQUIRES_VIOLATION, substringErr3REQUIRES_VIOLATION, substringErr8REQUIRES_VIOLATION, substringErr1REQUIRES_VIOLATION, substringErr6REQUIRES_VIOLATION, substringErr7REQUIRES_VIOLATION, substringErr5REQUIRES_VIOLATION, substringErr0REQUIRES_VIOLATION]=== [2020-10-19 17:59:02,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:02,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1490361144, now seen corresponding path program 1 times [2020-10-19 17:59:02,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:02,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149886239] [2020-10-19 17:59:02,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:02,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:02,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:02,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:02,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:02,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149886239] [2020-10-19 17:59:02,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 17:59:02,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-19 17:59:02,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713140947] [2020-10-19 17:59:02,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 17:59:02,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:02,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 17:59:02,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-19 17:59:02,998 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand 5 states. [2020-10-19 17:59:03,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:03,140 INFO L93 Difference]: Finished difference Result 79 states and 90 transitions. [2020-10-19 17:59:03,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 17:59:03,141 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-19 17:59:03,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:03,142 INFO L225 Difference]: With dead ends: 79 [2020-10-19 17:59:03,142 INFO L226 Difference]: Without dead ends: 79 [2020-10-19 17:59:03,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-19 17:59:03,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-19 17:59:03,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2020-10-19 17:59:03,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-19 17:59:03,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 82 transitions. [2020-10-19 17:59:03,151 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 82 transitions. Word has length 13 [2020-10-19 17:59:03,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:03,151 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 82 transitions. [2020-10-19 17:59:03,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 17:59:03,152 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 82 transitions. [2020-10-19 17:59:03,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-19 17:59:03,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:03,153 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:59:03,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-19 17:59:03,154 INFO L429 AbstractCegarLoop]: === Iteration 6 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, substringErr9REQUIRES_VIOLATION, substringErr4REQUIRES_VIOLATION, substringErr2REQUIRES_VIOLATION, substringErr3REQUIRES_VIOLATION, substringErr8REQUIRES_VIOLATION, substringErr1REQUIRES_VIOLATION, substringErr6REQUIRES_VIOLATION, substringErr7REQUIRES_VIOLATION, substringErr5REQUIRES_VIOLATION, substringErr0REQUIRES_VIOLATION]=== [2020-10-19 17:59:03,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:03,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1547619446, now seen corresponding path program 1 times [2020-10-19 17:59:03,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:03,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175559980] [2020-10-19 17:59:03,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:03,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:03,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:03,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:03,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:03,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175559980] [2020-10-19 17:59:03,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 17:59:03,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 17:59:03,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716608014] [2020-10-19 17:59:03,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 17:59:03,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:03,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 17:59:03,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 17:59:03,200 INFO L87 Difference]: Start difference. First operand 70 states and 82 transitions. Second operand 4 states. [2020-10-19 17:59:03,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:03,304 INFO L93 Difference]: Finished difference Result 68 states and 80 transitions. [2020-10-19 17:59:03,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 17:59:03,305 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-19 17:59:03,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:03,306 INFO L225 Difference]: With dead ends: 68 [2020-10-19 17:59:03,306 INFO L226 Difference]: Without dead ends: 68 [2020-10-19 17:59:03,307 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 17:59:03,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-19 17:59:03,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-19 17:59:03,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-19 17:59:03,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 80 transitions. [2020-10-19 17:59:03,313 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 80 transitions. Word has length 13 [2020-10-19 17:59:03,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:03,313 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 80 transitions. [2020-10-19 17:59:03,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 17:59:03,314 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 80 transitions. [2020-10-19 17:59:03,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-19 17:59:03,315 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:03,315 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:59:03,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-19 17:59:03,316 INFO L429 AbstractCegarLoop]: === Iteration 7 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, substringErr9REQUIRES_VIOLATION, substringErr4REQUIRES_VIOLATION, substringErr2REQUIRES_VIOLATION, substringErr3REQUIRES_VIOLATION, substringErr8REQUIRES_VIOLATION, substringErr1REQUIRES_VIOLATION, substringErr6REQUIRES_VIOLATION, substringErr7REQUIRES_VIOLATION, substringErr5REQUIRES_VIOLATION, substringErr0REQUIRES_VIOLATION]=== [2020-10-19 17:59:03,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:03,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1547619447, now seen corresponding path program 1 times [2020-10-19 17:59:03,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:03,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560264832] [2020-10-19 17:59:03,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:03,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:03,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:03,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:03,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:03,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560264832] [2020-10-19 17:59:03,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 17:59:03,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-19 17:59:03,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590105749] [2020-10-19 17:59:03,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-19 17:59:03,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:03,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 17:59:03,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-19 17:59:03,384 INFO L87 Difference]: Start difference. First operand 68 states and 80 transitions. Second operand 6 states. [2020-10-19 17:59:03,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:03,550 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2020-10-19 17:59:03,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 17:59:03,551 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-10-19 17:59:03,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:03,552 INFO L225 Difference]: With dead ends: 79 [2020-10-19 17:59:03,552 INFO L226 Difference]: Without dead ends: 79 [2020-10-19 17:59:03,553 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-19 17:59:03,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-19 17:59:03,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2020-10-19 17:59:03,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-19 17:59:03,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 83 transitions. [2020-10-19 17:59:03,560 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 83 transitions. Word has length 13 [2020-10-19 17:59:03,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:03,561 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 83 transitions. [2020-10-19 17:59:03,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-19 17:59:03,561 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 83 transitions. [2020-10-19 17:59:03,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-19 17:59:03,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:03,562 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:59:03,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-19 17:59:03,563 INFO L429 AbstractCegarLoop]: === Iteration 8 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, substringErr9REQUIRES_VIOLATION, substringErr4REQUIRES_VIOLATION, substringErr2REQUIRES_VIOLATION, substringErr3REQUIRES_VIOLATION, substringErr8REQUIRES_VIOLATION, substringErr1REQUIRES_VIOLATION, substringErr6REQUIRES_VIOLATION, substringErr7REQUIRES_VIOLATION, substringErr5REQUIRES_VIOLATION, substringErr0REQUIRES_VIOLATION]=== [2020-10-19 17:59:03,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:03,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1043446404, now seen corresponding path program 1 times [2020-10-19 17:59:03,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:03,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113736035] [2020-10-19 17:59:03,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:03,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:03,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:03,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:03,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:03,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113736035] [2020-10-19 17:59:03,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 17:59:03,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 17:59:03,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168928129] [2020-10-19 17:59:03,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 17:59:03,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:03,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 17:59:03,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-19 17:59:03,622 INFO L87 Difference]: Start difference. First operand 70 states and 83 transitions. Second operand 5 states. [2020-10-19 17:59:03,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:03,730 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2020-10-19 17:59:03,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 17:59:03,731 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-19 17:59:03,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:03,732 INFO L225 Difference]: With dead ends: 69 [2020-10-19 17:59:03,732 INFO L226 Difference]: Without dead ends: 69 [2020-10-19 17:59:03,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-19 17:59:03,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-19 17:59:03,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-10-19 17:59:03,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-19 17:59:03,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 82 transitions. [2020-10-19 17:59:03,738 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 82 transitions. Word has length 14 [2020-10-19 17:59:03,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:03,739 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 82 transitions. [2020-10-19 17:59:03,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 17:59:03,739 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 82 transitions. [2020-10-19 17:59:03,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-19 17:59:03,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:03,762 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:59:03,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-19 17:59:03,763 INFO L429 AbstractCegarLoop]: === Iteration 9 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, substringErr9REQUIRES_VIOLATION, substringErr4REQUIRES_VIOLATION, substringErr2REQUIRES_VIOLATION, substringErr3REQUIRES_VIOLATION, substringErr8REQUIRES_VIOLATION, substringErr1REQUIRES_VIOLATION, substringErr6REQUIRES_VIOLATION, substringErr7REQUIRES_VIOLATION, substringErr5REQUIRES_VIOLATION, substringErr0REQUIRES_VIOLATION]=== [2020-10-19 17:59:03,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:03,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1553442094, now seen corresponding path program 1 times [2020-10-19 17:59:03,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:03,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308719178] [2020-10-19 17:59:03,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:03,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:03,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:03,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:03,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:03,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308719178] [2020-10-19 17:59:03,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316038440] [2020-10-19 17:59:03,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:59:03,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:03,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-19 17:59:03,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 17:59:04,057 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_24|], 1=[|v_#valid_33|]} [2020-10-19 17:59:04,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 17:59:04,078 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-10-19 17:59:04,079 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 17:59:04,089 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 17:59:04,097 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-10-19 17:59:04,104 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-19 17:59:04,113 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 17:59:04,116 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-19 17:59:04,117 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:24, output treesize:12 [2020-10-19 17:59:04,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:04,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 17:59:04,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-10-19 17:59:04,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022976671] [2020-10-19 17:59:04,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-19 17:59:04,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:04,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-19 17:59:04,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-19 17:59:04,146 INFO L87 Difference]: Start difference. First operand 69 states and 82 transitions. Second operand 7 states. [2020-10-19 17:59:04,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:04,338 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2020-10-19 17:59:04,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 17:59:04,339 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-10-19 17:59:04,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:04,340 INFO L225 Difference]: With dead ends: 88 [2020-10-19 17:59:04,340 INFO L226 Difference]: Without dead ends: 88 [2020-10-19 17:59:04,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-19 17:59:04,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-19 17:59:04,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 64. [2020-10-19 17:59:04,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-19 17:59:04,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2020-10-19 17:59:04,345 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 15 [2020-10-19 17:59:04,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:04,346 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2020-10-19 17:59:04,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-19 17:59:04,346 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2020-10-19 17:59:04,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-19 17:59:04,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:04,347 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:59:04,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-10-19 17:59:04,558 INFO L429 AbstractCegarLoop]: === Iteration 10 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, substringErr9REQUIRES_VIOLATION, substringErr4REQUIRES_VIOLATION, substringErr2REQUIRES_VIOLATION, substringErr3REQUIRES_VIOLATION, substringErr8REQUIRES_VIOLATION, substringErr1REQUIRES_VIOLATION, substringErr6REQUIRES_VIOLATION, substringErr7REQUIRES_VIOLATION, substringErr5REQUIRES_VIOLATION, substringErr0REQUIRES_VIOLATION]=== [2020-10-19 17:59:04,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:04,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1661532524, now seen corresponding path program 1 times [2020-10-19 17:59:04,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:04,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488763547] [2020-10-19 17:59:04,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:04,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:04,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:04,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:04,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:04,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488763547] [2020-10-19 17:59:04,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 17:59:04,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-19 17:59:04,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840883839] [2020-10-19 17:59:04,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-19 17:59:04,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:04,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 17:59:04,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-19 17:59:04,634 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand 6 states. [2020-10-19 17:59:04,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:04,763 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2020-10-19 17:59:04,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 17:59:04,764 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-19 17:59:04,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:04,765 INFO L225 Difference]: With dead ends: 63 [2020-10-19 17:59:04,765 INFO L226 Difference]: Without dead ends: 63 [2020-10-19 17:59:04,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-19 17:59:04,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-19 17:59:04,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-19 17:59:04,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-19 17:59:04,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2020-10-19 17:59:04,776 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 17 [2020-10-19 17:59:04,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:04,776 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2020-10-19 17:59:04,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-19 17:59:04,777 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2020-10-19 17:59:04,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-19 17:59:04,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:04,779 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:59:04,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-19 17:59:04,781 INFO L429 AbstractCegarLoop]: === Iteration 11 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, substringErr9REQUIRES_VIOLATION, substringErr4REQUIRES_VIOLATION, substringErr2REQUIRES_VIOLATION, substringErr3REQUIRES_VIOLATION, substringErr8REQUIRES_VIOLATION, substringErr1REQUIRES_VIOLATION, substringErr6REQUIRES_VIOLATION, substringErr7REQUIRES_VIOLATION, substringErr5REQUIRES_VIOLATION, substringErr0REQUIRES_VIOLATION]=== [2020-10-19 17:59:04,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:04,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1661532525, now seen corresponding path program 1 times [2020-10-19 17:59:04,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:04,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747810206] [2020-10-19 17:59:04,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:04,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:04,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:04,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:04,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:04,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747810206] [2020-10-19 17:59:04,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 17:59:04,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-19 17:59:04,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369666926] [2020-10-19 17:59:04,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-19 17:59:04,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:04,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-19 17:59:04,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-19 17:59:04,878 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand 8 states. [2020-10-19 17:59:05,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:05,128 INFO L93 Difference]: Finished difference Result 85 states and 99 transitions. [2020-10-19 17:59:05,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-19 17:59:05,129 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-10-19 17:59:05,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:05,132 INFO L225 Difference]: With dead ends: 85 [2020-10-19 17:59:05,132 INFO L226 Difference]: Without dead ends: 85 [2020-10-19 17:59:05,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-19 17:59:05,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-19 17:59:05,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 64. [2020-10-19 17:59:05,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-19 17:59:05,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2020-10-19 17:59:05,137 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 17 [2020-10-19 17:59:05,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:05,137 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2020-10-19 17:59:05,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-19 17:59:05,137 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2020-10-19 17:59:05,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-19 17:59:05,138 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:05,138 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:59:05,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-19 17:59:05,138 INFO L429 AbstractCegarLoop]: === Iteration 12 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, substringErr9REQUIRES_VIOLATION, substringErr4REQUIRES_VIOLATION, substringErr2REQUIRES_VIOLATION, substringErr3REQUIRES_VIOLATION, substringErr8REQUIRES_VIOLATION, substringErr1REQUIRES_VIOLATION, substringErr6REQUIRES_VIOLATION, substringErr7REQUIRES_VIOLATION, substringErr5REQUIRES_VIOLATION, substringErr0REQUIRES_VIOLATION]=== [2020-10-19 17:59:05,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:05,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1317111226, now seen corresponding path program 1 times [2020-10-19 17:59:05,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:05,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94215305] [2020-10-19 17:59:05,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:05,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:05,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:05,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:05,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:05,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94215305] [2020-10-19 17:59:05,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519957207] [2020-10-19 17:59:05,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:59:05,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:05,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-19 17:59:05,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 17:59:05,321 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 17:59:05,322 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-10-19 17:59:05,322 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 17:59:05,339 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-10-19 17:59:05,341 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-19 17:59:05,341 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-10-19 17:59:05,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:05,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 17:59:05,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2020-10-19 17:59:05,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907696677] [2020-10-19 17:59:05,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-19 17:59:05,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:05,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-19 17:59:05,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-19 17:59:05,370 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand 8 states. [2020-10-19 17:59:05,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:05,559 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2020-10-19 17:59:05,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-19 17:59:05,560 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-10-19 17:59:05,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:05,561 INFO L225 Difference]: With dead ends: 71 [2020-10-19 17:59:05,561 INFO L226 Difference]: Without dead ends: 71 [2020-10-19 17:59:05,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-19 17:59:05,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-19 17:59:05,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 61. [2020-10-19 17:59:05,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-19 17:59:05,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2020-10-19 17:59:05,565 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 17 [2020-10-19 17:59:05,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:05,565 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2020-10-19 17:59:05,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-19 17:59:05,565 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2020-10-19 17:59:05,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-19 17:59:05,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:05,566 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:59:05,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-10-19 17:59:05,780 INFO L429 AbstractCegarLoop]: === Iteration 13 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, substringErr9REQUIRES_VIOLATION, substringErr4REQUIRES_VIOLATION, substringErr2REQUIRES_VIOLATION, substringErr3REQUIRES_VIOLATION, substringErr8REQUIRES_VIOLATION, substringErr1REQUIRES_VIOLATION, substringErr6REQUIRES_VIOLATION, substringErr7REQUIRES_VIOLATION, substringErr5REQUIRES_VIOLATION, substringErr0REQUIRES_VIOLATION]=== [2020-10-19 17:59:05,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:05,780 INFO L82 PathProgramCache]: Analyzing trace with hash -995076911, now seen corresponding path program 1 times [2020-10-19 17:59:05,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:05,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019810269] [2020-10-19 17:59:05,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:05,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:05,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:05,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:05,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:05,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019810269] [2020-10-19 17:59:05,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 17:59:05,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-19 17:59:05,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344457295] [2020-10-19 17:59:05,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-19 17:59:05,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:05,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-19 17:59:05,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-19 17:59:05,830 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand 7 states. [2020-10-19 17:59:05,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:05,988 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2020-10-19 17:59:05,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-19 17:59:05,989 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-10-19 17:59:05,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:05,990 INFO L225 Difference]: With dead ends: 62 [2020-10-19 17:59:05,990 INFO L226 Difference]: Without dead ends: 62 [2020-10-19 17:59:05,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-19 17:59:05,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-19 17:59:05,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2020-10-19 17:59:05,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-19 17:59:05,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2020-10-19 17:59:05,993 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 19 [2020-10-19 17:59:05,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:05,994 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2020-10-19 17:59:05,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-19 17:59:05,994 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2020-10-19 17:59:05,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-19 17:59:05,995 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:05,995 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:59:05,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-19 17:59:05,995 INFO L429 AbstractCegarLoop]: === Iteration 14 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, substringErr9REQUIRES_VIOLATION, substringErr4REQUIRES_VIOLATION, substringErr2REQUIRES_VIOLATION, substringErr3REQUIRES_VIOLATION, substringErr8REQUIRES_VIOLATION, substringErr1REQUIRES_VIOLATION, substringErr6REQUIRES_VIOLATION, substringErr7REQUIRES_VIOLATION, substringErr5REQUIRES_VIOLATION, substringErr0REQUIRES_VIOLATION]=== [2020-10-19 17:59:05,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:05,996 INFO L82 PathProgramCache]: Analyzing trace with hash -995076910, now seen corresponding path program 1 times [2020-10-19 17:59:05,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:05,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012827370] [2020-10-19 17:59:05,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:06,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:06,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:06,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:06,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:06,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012827370] [2020-10-19 17:59:06,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 17:59:06,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-19 17:59:06,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993465219] [2020-10-19 17:59:06,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-19 17:59:06,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:06,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-19 17:59:06,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-19 17:59:06,087 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand 9 states. [2020-10-19 17:59:06,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:06,369 INFO L93 Difference]: Finished difference Result 75 states and 88 transitions. [2020-10-19 17:59:06,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-19 17:59:06,370 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-10-19 17:59:06,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:06,371 INFO L225 Difference]: With dead ends: 75 [2020-10-19 17:59:06,371 INFO L226 Difference]: Without dead ends: 75 [2020-10-19 17:59:06,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-10-19 17:59:06,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-19 17:59:06,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 66. [2020-10-19 17:59:06,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-19 17:59:06,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2020-10-19 17:59:06,377 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 19 [2020-10-19 17:59:06,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:06,378 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2020-10-19 17:59:06,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-19 17:59:06,378 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2020-10-19 17:59:06,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-19 17:59:06,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:06,379 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:59:06,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-19 17:59:06,380 INFO L429 AbstractCegarLoop]: === Iteration 15 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, substringErr9REQUIRES_VIOLATION, substringErr4REQUIRES_VIOLATION, substringErr2REQUIRES_VIOLATION, substringErr3REQUIRES_VIOLATION, substringErr8REQUIRES_VIOLATION, substringErr1REQUIRES_VIOLATION, substringErr6REQUIRES_VIOLATION, substringErr7REQUIRES_VIOLATION, substringErr5REQUIRES_VIOLATION, substringErr0REQUIRES_VIOLATION]=== [2020-10-19 17:59:06,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:06,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1744606647, now seen corresponding path program 1 times [2020-10-19 17:59:06,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:06,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930367554] [2020-10-19 17:59:06,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:06,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:06,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:06,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:06,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:06,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930367554] [2020-10-19 17:59:06,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 17:59:06,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 17:59:06,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242731646] [2020-10-19 17:59:06,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 17:59:06,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:06,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 17:59:06,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 17:59:06,461 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand 4 states. [2020-10-19 17:59:06,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:06,547 INFO L93 Difference]: Finished difference Result 68 states and 81 transitions. [2020-10-19 17:59:06,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 17:59:06,548 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-19 17:59:06,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:06,549 INFO L225 Difference]: With dead ends: 68 [2020-10-19 17:59:06,549 INFO L226 Difference]: Without dead ends: 68 [2020-10-19 17:59:06,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 17:59:06,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-19 17:59:06,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-19 17:59:06,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-19 17:59:06,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 81 transitions. [2020-10-19 17:59:06,556 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 81 transitions. Word has length 23 [2020-10-19 17:59:06,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:06,556 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 81 transitions. [2020-10-19 17:59:06,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 17:59:06,556 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 81 transitions. [2020-10-19 17:59:06,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-19 17:59:06,557 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:06,558 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:59:06,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-19 17:59:06,558 INFO L429 AbstractCegarLoop]: === Iteration 16 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, substringErr9REQUIRES_VIOLATION, substringErr4REQUIRES_VIOLATION, substringErr2REQUIRES_VIOLATION, substringErr3REQUIRES_VIOLATION, substringErr8REQUIRES_VIOLATION, substringErr1REQUIRES_VIOLATION, substringErr6REQUIRES_VIOLATION, substringErr7REQUIRES_VIOLATION, substringErr5REQUIRES_VIOLATION, substringErr0REQUIRES_VIOLATION]=== [2020-10-19 17:59:06,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:06,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1744615721, now seen corresponding path program 1 times [2020-10-19 17:59:06,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:06,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159948206] [2020-10-19 17:59:06,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:06,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:06,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:06,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:06,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:06,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159948206] [2020-10-19 17:59:06,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 17:59:06,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-19 17:59:06,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836515351] [2020-10-19 17:59:06,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-19 17:59:06,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:06,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-19 17:59:06,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-19 17:59:06,645 INFO L87 Difference]: Start difference. First operand 68 states and 81 transitions. Second operand 7 states. [2020-10-19 17:59:06,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:06,832 INFO L93 Difference]: Finished difference Result 71 states and 84 transitions. [2020-10-19 17:59:06,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-19 17:59:06,832 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-10-19 17:59:06,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:06,833 INFO L225 Difference]: With dead ends: 71 [2020-10-19 17:59:06,833 INFO L226 Difference]: Without dead ends: 71 [2020-10-19 17:59:06,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-19 17:59:06,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-19 17:59:06,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2020-10-19 17:59:06,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-19 17:59:06,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2020-10-19 17:59:06,837 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 23 [2020-10-19 17:59:06,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:06,838 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2020-10-19 17:59:06,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-19 17:59:06,838 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2020-10-19 17:59:06,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-19 17:59:06,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:06,839 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:59:06,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-19 17:59:06,840 INFO L429 AbstractCegarLoop]: === Iteration 17 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, substringErr9REQUIRES_VIOLATION, substringErr4REQUIRES_VIOLATION, substringErr2REQUIRES_VIOLATION, substringErr3REQUIRES_VIOLATION, substringErr8REQUIRES_VIOLATION, substringErr1REQUIRES_VIOLATION, substringErr6REQUIRES_VIOLATION, substringErr7REQUIRES_VIOLATION, substringErr5REQUIRES_VIOLATION, substringErr0REQUIRES_VIOLATION]=== [2020-10-19 17:59:06,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:06,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1744615720, now seen corresponding path program 1 times [2020-10-19 17:59:06,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:06,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051060603] [2020-10-19 17:59:06,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:06,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:06,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:06,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:06,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:06,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051060603] [2020-10-19 17:59:06,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 17:59:06,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-19 17:59:06,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989966602] [2020-10-19 17:59:06,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-19 17:59:06,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:06,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-19 17:59:06,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-19 17:59:06,942 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand 8 states. [2020-10-19 17:59:07,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:07,202 INFO L93 Difference]: Finished difference Result 103 states and 123 transitions. [2020-10-19 17:59:07,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-19 17:59:07,202 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-19 17:59:07,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:07,203 INFO L225 Difference]: With dead ends: 103 [2020-10-19 17:59:07,203 INFO L226 Difference]: Without dead ends: 103 [2020-10-19 17:59:07,204 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-19 17:59:07,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-19 17:59:07,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 73. [2020-10-19 17:59:07,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-19 17:59:07,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 87 transitions. [2020-10-19 17:59:07,207 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 87 transitions. Word has length 23 [2020-10-19 17:59:07,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:07,208 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 87 transitions. [2020-10-19 17:59:07,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-19 17:59:07,208 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 87 transitions. [2020-10-19 17:59:07,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-19 17:59:07,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:07,209 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:59:07,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-19 17:59:07,209 INFO L429 AbstractCegarLoop]: === Iteration 18 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, substringErr9REQUIRES_VIOLATION, substringErr4REQUIRES_VIOLATION, substringErr2REQUIRES_VIOLATION, substringErr3REQUIRES_VIOLATION, substringErr8REQUIRES_VIOLATION, substringErr1REQUIRES_VIOLATION, substringErr6REQUIRES_VIOLATION, substringErr7REQUIRES_VIOLATION, substringErr5REQUIRES_VIOLATION, substringErr0REQUIRES_VIOLATION]=== [2020-10-19 17:59:07,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:07,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1768533058, now seen corresponding path program 1 times [2020-10-19 17:59:07,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:07,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237020491] [2020-10-19 17:59:07,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:07,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:07,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:07,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:07,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-19 17:59:07,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:07,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:07,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237020491] [2020-10-19 17:59:07,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 17:59:07,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 17:59:07,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742387342] [2020-10-19 17:59:07,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 17:59:07,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:07,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 17:59:07,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-19 17:59:07,273 INFO L87 Difference]: Start difference. First operand 73 states and 87 transitions. Second operand 5 states. [2020-10-19 17:59:07,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:07,349 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2020-10-19 17:59:07,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 17:59:07,350 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-19 17:59:07,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:07,351 INFO L225 Difference]: With dead ends: 72 [2020-10-19 17:59:07,351 INFO L226 Difference]: Without dead ends: 67 [2020-10-19 17:59:07,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-19 17:59:07,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-19 17:59:07,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-19 17:59:07,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-19 17:59:07,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2020-10-19 17:59:07,354 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 23 [2020-10-19 17:59:07,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:07,354 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2020-10-19 17:59:07,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 17:59:07,354 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2020-10-19 17:59:07,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-19 17:59:07,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:07,355 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:59:07,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-19 17:59:07,355 INFO L429 AbstractCegarLoop]: === Iteration 19 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, substringErr9REQUIRES_VIOLATION, substringErr4REQUIRES_VIOLATION, substringErr2REQUIRES_VIOLATION, substringErr3REQUIRES_VIOLATION, substringErr8REQUIRES_VIOLATION, substringErr1REQUIRES_VIOLATION, substringErr6REQUIRES_VIOLATION, substringErr7REQUIRES_VIOLATION, substringErr5REQUIRES_VIOLATION, substringErr0REQUIRES_VIOLATION]=== [2020-10-19 17:59:07,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:07,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1529776103, now seen corresponding path program 1 times [2020-10-19 17:59:07,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:07,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946996368] [2020-10-19 17:59:07,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:07,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:07,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:07,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:07,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:07,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946996368] [2020-10-19 17:59:07,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 17:59:07,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-19 17:59:07,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031678062] [2020-10-19 17:59:07,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-19 17:59:07,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:07,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-19 17:59:07,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-19 17:59:07,405 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand 7 states. [2020-10-19 17:59:07,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:07,597 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2020-10-19 17:59:07,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-19 17:59:07,597 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-19 17:59:07,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:07,598 INFO L225 Difference]: With dead ends: 71 [2020-10-19 17:59:07,598 INFO L226 Difference]: Without dead ends: 68 [2020-10-19 17:59:07,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-19 17:59:07,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-19 17:59:07,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-10-19 17:59:07,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-19 17:59:07,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 77 transitions. [2020-10-19 17:59:07,601 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 77 transitions. Word has length 25 [2020-10-19 17:59:07,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:07,602 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 77 transitions. [2020-10-19 17:59:07,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-19 17:59:07,602 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 77 transitions. [2020-10-19 17:59:07,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-19 17:59:07,602 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:07,603 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:59:07,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-19 17:59:07,603 INFO L429 AbstractCegarLoop]: === Iteration 20 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, substringErr9REQUIRES_VIOLATION, substringErr4REQUIRES_VIOLATION, substringErr2REQUIRES_VIOLATION, substringErr3REQUIRES_VIOLATION, substringErr8REQUIRES_VIOLATION, substringErr1REQUIRES_VIOLATION, substringErr6REQUIRES_VIOLATION, substringErr7REQUIRES_VIOLATION, substringErr5REQUIRES_VIOLATION, substringErr0REQUIRES_VIOLATION]=== [2020-10-19 17:59:07,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:07,603 INFO L82 PathProgramCache]: Analyzing trace with hash -447626662, now seen corresponding path program 1 times [2020-10-19 17:59:07,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:07,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694932136] [2020-10-19 17:59:07,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:07,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:07,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:07,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:07,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 17:59:07,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694932136] [2020-10-19 17:59:07,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 17:59:07,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-19 17:59:07,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52302804] [2020-10-19 17:59:07,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-19 17:59:07,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:07,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-19 17:59:07,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-19 17:59:07,747 INFO L87 Difference]: Start difference. First operand 67 states and 77 transitions. Second operand 10 states. [2020-10-19 17:59:07,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:07,990 INFO L93 Difference]: Finished difference Result 80 states and 90 transitions. [2020-10-19 17:59:07,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-19 17:59:07,991 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-19 17:59:07,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:07,992 INFO L225 Difference]: With dead ends: 80 [2020-10-19 17:59:07,992 INFO L226 Difference]: Without dead ends: 62 [2020-10-19 17:59:07,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-10-19 17:59:07,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-19 17:59:07,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-19 17:59:07,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-19 17:59:07,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2020-10-19 17:59:07,995 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 26 [2020-10-19 17:59:07,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:07,995 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2020-10-19 17:59:07,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-19 17:59:07,995 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2020-10-19 17:59:07,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-19 17:59:07,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:07,996 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:59:07,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-19 17:59:07,996 INFO L429 AbstractCegarLoop]: === Iteration 21 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, substringErr9REQUIRES_VIOLATION, substringErr4REQUIRES_VIOLATION, substringErr2REQUIRES_VIOLATION, substringErr3REQUIRES_VIOLATION, substringErr8REQUIRES_VIOLATION, substringErr1REQUIRES_VIOLATION, substringErr6REQUIRES_VIOLATION, substringErr7REQUIRES_VIOLATION, substringErr5REQUIRES_VIOLATION, substringErr0REQUIRES_VIOLATION]=== [2020-10-19 17:59:07,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:07,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1265275112, now seen corresponding path program 1 times [2020-10-19 17:59:07,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:07,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77025029] [2020-10-19 17:59:07,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:08,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:08,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:08,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:08,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 17:59:08,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77025029] [2020-10-19 17:59:08,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 17:59:08,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-19 17:59:08,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656369189] [2020-10-19 17:59:08,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-19 17:59:08,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:08,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-19 17:59:08,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-19 17:59:08,183 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand 11 states. [2020-10-19 17:59:08,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:08,433 INFO L93 Difference]: Finished difference Result 83 states and 93 transitions. [2020-10-19 17:59:08,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-19 17:59:08,433 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-10-19 17:59:08,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:08,434 INFO L225 Difference]: With dead ends: 83 [2020-10-19 17:59:08,434 INFO L226 Difference]: Without dead ends: 70 [2020-10-19 17:59:08,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-10-19 17:59:08,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-19 17:59:08,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-10-19 17:59:08,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-19 17:59:08,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2020-10-19 17:59:08,438 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 26 [2020-10-19 17:59:08,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:08,438 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2020-10-19 17:59:08,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-19 17:59:08,438 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2020-10-19 17:59:08,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-19 17:59:08,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:08,440 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:59:08,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-19 17:59:08,441 INFO L429 AbstractCegarLoop]: === Iteration 22 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, substringErr9REQUIRES_VIOLATION, substringErr4REQUIRES_VIOLATION, substringErr2REQUIRES_VIOLATION, substringErr3REQUIRES_VIOLATION, substringErr8REQUIRES_VIOLATION, substringErr1REQUIRES_VIOLATION, substringErr6REQUIRES_VIOLATION, substringErr7REQUIRES_VIOLATION, substringErr5REQUIRES_VIOLATION, substringErr0REQUIRES_VIOLATION]=== [2020-10-19 17:59:08,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:08,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1692710901, now seen corresponding path program 1 times [2020-10-19 17:59:08,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:08,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105494395] [2020-10-19 17:59:08,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:08,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:08,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:08,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:08,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 17:59:08,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105494395] [2020-10-19 17:59:08,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 17:59:08,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-19 17:59:08,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512876544] [2020-10-19 17:59:08,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-19 17:59:08,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:08,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-19 17:59:08,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-19 17:59:08,608 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand 11 states. [2020-10-19 17:59:08,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:08,915 INFO L93 Difference]: Finished difference Result 73 states and 80 transitions. [2020-10-19 17:59:08,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-19 17:59:08,917 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-19 17:59:08,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:08,918 INFO L225 Difference]: With dead ends: 73 [2020-10-19 17:59:08,918 INFO L226 Difference]: Without dead ends: 56 [2020-10-19 17:59:08,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-10-19 17:59:08,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-19 17:59:08,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-19 17:59:08,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-19 17:59:08,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2020-10-19 17:59:08,922 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 30 [2020-10-19 17:59:08,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:08,922 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2020-10-19 17:59:08,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-19 17:59:08,922 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2020-10-19 17:59:08,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-19 17:59:08,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:08,924 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:59:08,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-19 17:59:08,925 INFO L429 AbstractCegarLoop]: === Iteration 23 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, substringErr9REQUIRES_VIOLATION, substringErr4REQUIRES_VIOLATION, substringErr2REQUIRES_VIOLATION, substringErr3REQUIRES_VIOLATION, substringErr8REQUIRES_VIOLATION, substringErr1REQUIRES_VIOLATION, substringErr6REQUIRES_VIOLATION, substringErr7REQUIRES_VIOLATION, substringErr5REQUIRES_VIOLATION, substringErr0REQUIRES_VIOLATION]=== [2020-10-19 17:59:08,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:08,925 INFO L82 PathProgramCache]: Analyzing trace with hash -112727433, now seen corresponding path program 1 times [2020-10-19 17:59:08,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:08,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017973169] [2020-10-19 17:59:08,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:08,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:09,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:09,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:09,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 17:59:09,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017973169] [2020-10-19 17:59:09,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 17:59:09,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-10-19 17:59:09,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505156512] [2020-10-19 17:59:09,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-19 17:59:09,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:09,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-19 17:59:09,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-19 17:59:09,118 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand 13 states. [2020-10-19 17:59:09,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:09,444 INFO L93 Difference]: Finished difference Result 69 states and 75 transitions. [2020-10-19 17:59:09,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-19 17:59:09,444 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-10-19 17:59:09,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:09,445 INFO L225 Difference]: With dead ends: 69 [2020-10-19 17:59:09,445 INFO L226 Difference]: Without dead ends: 60 [2020-10-19 17:59:09,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2020-10-19 17:59:09,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-19 17:59:09,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2020-10-19 17:59:09,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-19 17:59:09,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2020-10-19 17:59:09,448 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 30 [2020-10-19 17:59:09,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:09,449 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2020-10-19 17:59:09,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-19 17:59:09,449 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2020-10-19 17:59:09,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-19 17:59:09,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:09,450 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:59:09,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-19 17:59:09,450 INFO L429 AbstractCegarLoop]: === Iteration 24 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, substringErr9REQUIRES_VIOLATION, substringErr4REQUIRES_VIOLATION, substringErr2REQUIRES_VIOLATION, substringErr3REQUIRES_VIOLATION, substringErr8REQUIRES_VIOLATION, substringErr1REQUIRES_VIOLATION, substringErr6REQUIRES_VIOLATION, substringErr7REQUIRES_VIOLATION, substringErr5REQUIRES_VIOLATION, substringErr0REQUIRES_VIOLATION]=== [2020-10-19 17:59:09,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:09,450 INFO L82 PathProgramCache]: Analyzing trace with hash -147074924, now seen corresponding path program 1 times [2020-10-19 17:59:09,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:09,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127625851] [2020-10-19 17:59:09,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:09,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:09,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:09,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:09,567 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 17:59:09,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127625851] [2020-10-19 17:59:09,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884770252] [2020-10-19 17:59:09,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:59:09,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:09,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-19 17:59:09,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 17:59:09,813 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 17:59:09,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 17:59:09,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-10-19 17:59:09,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647917655] [2020-10-19 17:59:09,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-19 17:59:09,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:09,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-19 17:59:09,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-10-19 17:59:09,815 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand 17 states. [2020-10-19 17:59:10,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:10,204 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2020-10-19 17:59:10,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-19 17:59:10,205 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 34 [2020-10-19 17:59:10,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:10,206 INFO L225 Difference]: With dead ends: 80 [2020-10-19 17:59:10,206 INFO L226 Difference]: Without dead ends: 78 [2020-10-19 17:59:10,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-19 17:59:10,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-19 17:59:10,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 64. [2020-10-19 17:59:10,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-19 17:59:10,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2020-10-19 17:59:10,209 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 34 [2020-10-19 17:59:10,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:10,209 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2020-10-19 17:59:10,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-19 17:59:10,209 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2020-10-19 17:59:10,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-19 17:59:10,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:10,210 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:59:10,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-19 17:59:10,420 INFO L429 AbstractCegarLoop]: === Iteration 25 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, substringErr9REQUIRES_VIOLATION, substringErr4REQUIRES_VIOLATION, substringErr2REQUIRES_VIOLATION, substringErr3REQUIRES_VIOLATION, substringErr8REQUIRES_VIOLATION, substringErr1REQUIRES_VIOLATION, substringErr6REQUIRES_VIOLATION, substringErr7REQUIRES_VIOLATION, substringErr5REQUIRES_VIOLATION, substringErr0REQUIRES_VIOLATION]=== [2020-10-19 17:59:10,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:10,420 INFO L82 PathProgramCache]: Analyzing trace with hash 394885028, now seen corresponding path program 1 times [2020-10-19 17:59:10,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:10,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375794305] [2020-10-19 17:59:10,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:10,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:10,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:10,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:10,514 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 17:59:10,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375794305] [2020-10-19 17:59:10,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916869499] [2020-10-19 17:59:10,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:59:10,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:10,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-19 17:59:10,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 17:59:10,728 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 17:59:10,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 17:59:10,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-10-19 17:59:10,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796913501] [2020-10-19 17:59:10,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-19 17:59:10,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:10,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-19 17:59:10,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-10-19 17:59:10,730 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand 15 states. [2020-10-19 17:59:11,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:11,122 INFO L93 Difference]: Finished difference Result 124 states and 143 transitions. [2020-10-19 17:59:11,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-19 17:59:11,122 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2020-10-19 17:59:11,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:11,124 INFO L225 Difference]: With dead ends: 124 [2020-10-19 17:59:11,124 INFO L226 Difference]: Without dead ends: 124 [2020-10-19 17:59:11,125 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2020-10-19 17:59:11,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-19 17:59:11,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 84. [2020-10-19 17:59:11,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-19 17:59:11,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 101 transitions. [2020-10-19 17:59:11,128 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 101 transitions. Word has length 36 [2020-10-19 17:59:11,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:11,128 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 101 transitions. [2020-10-19 17:59:11,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-19 17:59:11,129 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 101 transitions. [2020-10-19 17:59:11,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-19 17:59:11,129 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:11,129 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:59:11,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:59:11,341 INFO L429 AbstractCegarLoop]: === Iteration 26 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, substringErr9REQUIRES_VIOLATION, substringErr4REQUIRES_VIOLATION, substringErr2REQUIRES_VIOLATION, substringErr3REQUIRES_VIOLATION, substringErr8REQUIRES_VIOLATION, substringErr1REQUIRES_VIOLATION, substringErr6REQUIRES_VIOLATION, substringErr7REQUIRES_VIOLATION, substringErr5REQUIRES_VIOLATION, substringErr0REQUIRES_VIOLATION]=== [2020-10-19 17:59:11,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:11,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1560744346, now seen corresponding path program 1 times [2020-10-19 17:59:11,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:11,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618622852] [2020-10-19 17:59:11,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:11,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:11,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:11,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:11,449 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 17:59:11,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618622852] [2020-10-19 17:59:11,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034400513] [2020-10-19 17:59:11,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:59:11,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:11,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-19 17:59:11,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 17:59:11,698 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 17:59:11,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 17:59:11,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-10-19 17:59:11,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10166356] [2020-10-19 17:59:11,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-19 17:59:11,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:11,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-19 17:59:11,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-10-19 17:59:11,701 INFO L87 Difference]: Start difference. First operand 84 states and 101 transitions. Second operand 17 states. [2020-10-19 17:59:12,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:12,238 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2020-10-19 17:59:12,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-19 17:59:12,238 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 38 [2020-10-19 17:59:12,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:12,240 INFO L225 Difference]: With dead ends: 100 [2020-10-19 17:59:12,240 INFO L226 Difference]: Without dead ends: 100 [2020-10-19 17:59:12,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2020-10-19 17:59:12,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-19 17:59:12,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 84. [2020-10-19 17:59:12,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-19 17:59:12,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2020-10-19 17:59:12,244 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 38 [2020-10-19 17:59:12,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:12,245 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2020-10-19 17:59:12,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-19 17:59:12,245 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2020-10-19 17:59:12,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-19 17:59:12,245 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:12,246 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-19 17:59:12,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-19 17:59:12,457 INFO L429 AbstractCegarLoop]: === Iteration 27 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, substringErr9REQUIRES_VIOLATION, substringErr4REQUIRES_VIOLATION, substringErr2REQUIRES_VIOLATION, substringErr3REQUIRES_VIOLATION, substringErr8REQUIRES_VIOLATION, substringErr1REQUIRES_VIOLATION, substringErr6REQUIRES_VIOLATION, substringErr7REQUIRES_VIOLATION, substringErr5REQUIRES_VIOLATION, substringErr0REQUIRES_VIOLATION]=== [2020-10-19 17:59:12,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:12,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1181095848, now seen corresponding path program 2 times [2020-10-19 17:59:12,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:12,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432599029] [2020-10-19 17:59:12,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:12,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:12,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:12,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:12,721 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 17:59:12,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432599029] [2020-10-19 17:59:12,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141149884] [2020-10-19 17:59:12,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:59:12,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 17:59:12,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 17:59:12,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 58 conjunts are in the unsatisfiable core [2020-10-19 17:59:12,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 17:59:12,875 INFO L350 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-10-19 17:59:12,875 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2020-10-19 17:59:12,877 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 17:59:12,886 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 17:59:12,887 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-19 17:59:12,887 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:21 [2020-10-19 17:59:13,009 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-10-19 17:59:13,009 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 17:59:13,021 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 17:59:13,024 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-19 17:59:13,024 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:34 [2020-10-19 17:59:13,077 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2020-10-19 17:59:13,078 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 17:59:13,092 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 17:59:13,094 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-10-19 17:59:13,094 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:48, output treesize:44 [2020-10-19 17:59:13,640 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-10-19 17:59:13,641 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 17:59:13,656 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 17:59:13,659 INFO L545 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-10-19 17:59:13,659 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:59, output treesize:49 [2020-10-19 17:59:14,215 WARN L193 SmtUtils]: Spent 413.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-10-19 17:59:14,469 INFO L173 IndexEqualityManager]: detected equality via solver [2020-10-19 17:59:14,474 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 17:59:14,474 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 28 [2020-10-19 17:59:14,478 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 17:59:14,517 INFO L625 ElimStorePlain]: treesize reduction 4, result has 90.0 percent of original size [2020-10-19 17:59:14,521 INFO L545 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 17:59:14,522 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 9 variables, input treesize:64, output treesize:8 [2020-10-19 17:59:14,566 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 17:59:14,588 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 17:59:14,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 17:59:14,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 31 [2020-10-19 17:59:14,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431236553] [2020-10-19 17:59:14,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-19 17:59:14,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:14,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-19 17:59:14,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=859, Unknown=0, NotChecked=0, Total=930 [2020-10-19 17:59:14,590 INFO L87 Difference]: Start difference. First operand 84 states and 100 transitions. Second operand 31 states. [2020-10-19 17:59:15,990 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2020-10-19 17:59:16,726 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 82 [2020-10-19 17:59:16,998 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 83 [2020-10-19 17:59:17,258 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 85 [2020-10-19 17:59:17,452 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2020-10-19 17:59:17,732 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 88 [2020-10-19 17:59:19,708 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 94 DAG size of output: 94 [2020-10-19 17:59:20,012 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 91 [2020-10-19 17:59:20,272 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 95 [2020-10-19 17:59:20,599 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 97 [2020-10-19 17:59:23,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:23,704 INFO L93 Difference]: Finished difference Result 243 states and 270 transitions. [2020-10-19 17:59:23,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-19 17:59:23,713 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 41 [2020-10-19 17:59:23,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:23,715 INFO L225 Difference]: With dead ends: 243 [2020-10-19 17:59:23,715 INFO L226 Difference]: Without dead ends: 231 [2020-10-19 17:59:23,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1527 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=622, Invalid=5540, Unknown=0, NotChecked=0, Total=6162 [2020-10-19 17:59:23,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-19 17:59:23,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 149. [2020-10-19 17:59:23,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-19 17:59:23,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 172 transitions. [2020-10-19 17:59:23,729 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 172 transitions. Word has length 41 [2020-10-19 17:59:23,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:23,730 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 172 transitions. [2020-10-19 17:59:23,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-19 17:59:23,730 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 172 transitions. [2020-10-19 17:59:23,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-19 17:59:23,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:23,731 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:59:23,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:59:23,945 INFO L429 AbstractCegarLoop]: === Iteration 28 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, substringErr9REQUIRES_VIOLATION, substringErr4REQUIRES_VIOLATION, substringErr2REQUIRES_VIOLATION, substringErr3REQUIRES_VIOLATION, substringErr8REQUIRES_VIOLATION, substringErr1REQUIRES_VIOLATION, substringErr6REQUIRES_VIOLATION, substringErr7REQUIRES_VIOLATION, substringErr5REQUIRES_VIOLATION, substringErr0REQUIRES_VIOLATION]=== [2020-10-19 17:59:23,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:23,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1692139569, now seen corresponding path program 1 times [2020-10-19 17:59:23,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:23,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373430953] [2020-10-19 17:59:23,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:23,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:24,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:24,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:24,090 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 17:59:24,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373430953] [2020-10-19 17:59:24,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756264547] [2020-10-19 17:59:24,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:59:24,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:24,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-19 17:59:24,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 17:59:24,314 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 17:59:24,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 17:59:24,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-10-19 17:59:24,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286489914] [2020-10-19 17:59:24,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-19 17:59:24,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:24,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-19 17:59:24,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-19 17:59:24,316 INFO L87 Difference]: Start difference. First operand 149 states and 172 transitions. Second operand 16 states. [2020-10-19 17:59:24,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:24,842 INFO L93 Difference]: Finished difference Result 203 states and 228 transitions. [2020-10-19 17:59:24,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-19 17:59:24,844 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2020-10-19 17:59:24,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:24,846 INFO L225 Difference]: With dead ends: 203 [2020-10-19 17:59:24,846 INFO L226 Difference]: Without dead ends: 203 [2020-10-19 17:59:24,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2020-10-19 17:59:24,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-19 17:59:24,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 161. [2020-10-19 17:59:24,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-19 17:59:24,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 184 transitions. [2020-10-19 17:59:24,852 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 184 transitions. Word has length 42 [2020-10-19 17:59:24,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:24,852 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 184 transitions. [2020-10-19 17:59:24,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-19 17:59:24,853 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 184 transitions. [2020-10-19 17:59:24,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-19 17:59:24,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:24,854 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-19 17:59:25,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-19 17:59:25,066 INFO L429 AbstractCegarLoop]: === Iteration 29 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, substringErr9REQUIRES_VIOLATION, substringErr4REQUIRES_VIOLATION, substringErr2REQUIRES_VIOLATION, substringErr3REQUIRES_VIOLATION, substringErr8REQUIRES_VIOLATION, substringErr1REQUIRES_VIOLATION, substringErr6REQUIRES_VIOLATION, substringErr7REQUIRES_VIOLATION, substringErr5REQUIRES_VIOLATION, substringErr0REQUIRES_VIOLATION]=== [2020-10-19 17:59:25,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:25,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1777949011, now seen corresponding path program 2 times [2020-10-19 17:59:25,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:25,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035715412] [2020-10-19 17:59:25,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:25,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:25,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:25,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:25,347 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 17:59:25,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035715412] [2020-10-19 17:59:25,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116900436] [2020-10-19 17:59:25,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:59:25,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 17:59:25,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 17:59:25,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-19 17:59:25,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 17:59:25,461 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-10-19 17:59:25,462 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 17:59:25,465 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 17:59:25,466 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-19 17:59:25,466 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-10-19 17:59:25,562 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-10-19 17:59:25,563 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 17:59:25,569 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 17:59:25,570 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-19 17:59:25,570 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2020-10-19 17:59:25,608 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2020-10-19 17:59:25,609 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 17:59:25,617 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 17:59:25,619 INFO L545 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-10-19 17:59:25,620 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:35, output treesize:31 [2020-10-19 17:59:25,881 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 17:59:25,881 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 21 [2020-10-19 17:59:25,882 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-10-19 17:59:25,908 INFO L625 ElimStorePlain]: treesize reduction 8, result has 63.6 percent of original size [2020-10-19 17:59:25,909 INFO L545 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 17:59:25,910 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:38, output treesize:3 [2020-10-19 17:59:25,921 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 17:59:25,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 17:59:25,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2020-10-19 17:59:25,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251613672] [2020-10-19 17:59:25,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-19 17:59:25,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:25,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-19 17:59:25,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2020-10-19 17:59:25,923 INFO L87 Difference]: Start difference. First operand 161 states and 184 transitions. Second operand 22 states. [2020-10-19 17:59:26,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:26,901 INFO L93 Difference]: Finished difference Result 185 states and 206 transitions. [2020-10-19 17:59:26,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-19 17:59:26,901 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 47 [2020-10-19 17:59:26,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:26,902 INFO L225 Difference]: With dead ends: 185 [2020-10-19 17:59:26,902 INFO L226 Difference]: Without dead ends: 134 [2020-10-19 17:59:26,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2020-10-19 17:59:26,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-19 17:59:26,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 131. [2020-10-19 17:59:26,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-19 17:59:26,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 150 transitions. [2020-10-19 17:59:26,907 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 150 transitions. Word has length 47 [2020-10-19 17:59:26,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:26,907 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 150 transitions. [2020-10-19 17:59:26,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-19 17:59:26,907 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 150 transitions. [2020-10-19 17:59:26,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-19 17:59:26,908 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:26,908 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-19 17:59:27,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-19 17:59:27,119 INFO L429 AbstractCegarLoop]: === Iteration 30 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, substringErr9REQUIRES_VIOLATION, substringErr4REQUIRES_VIOLATION, substringErr2REQUIRES_VIOLATION, substringErr3REQUIRES_VIOLATION, substringErr8REQUIRES_VIOLATION, substringErr1REQUIRES_VIOLATION, substringErr6REQUIRES_VIOLATION, substringErr7REQUIRES_VIOLATION, substringErr5REQUIRES_VIOLATION, substringErr0REQUIRES_VIOLATION]=== [2020-10-19 17:59:27,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:27,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1307637534, now seen corresponding path program 3 times [2020-10-19 17:59:27,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:27,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316163527] [2020-10-19 17:59:27,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:27,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:27,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:27,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:27,276 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-19 17:59:27,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316163527] [2020-10-19 17:59:27,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512762817] [2020-10-19 17:59:27,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:59:27,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-19 17:59:27,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 17:59:27,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-19 17:59:27,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 17:59:27,585 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-19 17:59:27,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 17:59:27,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2020-10-19 17:59:27,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215925017] [2020-10-19 17:59:27,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-19 17:59:27,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:27,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-19 17:59:27,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2020-10-19 17:59:27,587 INFO L87 Difference]: Start difference. First operand 131 states and 150 transitions. Second operand 22 states. [2020-10-19 17:59:28,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:28,353 INFO L93 Difference]: Finished difference Result 177 states and 196 transitions. [2020-10-19 17:59:28,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-19 17:59:28,354 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 49 [2020-10-19 17:59:28,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:28,356 INFO L225 Difference]: With dead ends: 177 [2020-10-19 17:59:28,356 INFO L226 Difference]: Without dead ends: 175 [2020-10-19 17:59:28,357 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2020-10-19 17:59:28,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-19 17:59:28,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 145. [2020-10-19 17:59:28,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-19 17:59:28,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 168 transitions. [2020-10-19 17:59:28,361 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 168 transitions. Word has length 49 [2020-10-19 17:59:28,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:28,361 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 168 transitions. [2020-10-19 17:59:28,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-19 17:59:28,362 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 168 transitions. [2020-10-19 17:59:28,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-19 17:59:28,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:28,362 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-19 17:59:28,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:59:28,568 INFO L429 AbstractCegarLoop]: === Iteration 31 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, substringErr9REQUIRES_VIOLATION, substringErr4REQUIRES_VIOLATION, substringErr2REQUIRES_VIOLATION, substringErr3REQUIRES_VIOLATION, substringErr8REQUIRES_VIOLATION, substringErr1REQUIRES_VIOLATION, substringErr6REQUIRES_VIOLATION, substringErr7REQUIRES_VIOLATION, substringErr5REQUIRES_VIOLATION, substringErr0REQUIRES_VIOLATION]=== [2020-10-19 17:59:28,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:28,569 INFO L82 PathProgramCache]: Analyzing trace with hash -426369642, now seen corresponding path program 3 times [2020-10-19 17:59:28,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:28,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903904026] [2020-10-19 17:59:28,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:28,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:28,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:28,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:28,732 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 17:59:28,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903904026] [2020-10-19 17:59:28,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084530664] [2020-10-19 17:59:28,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:59:28,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-19 17:59:28,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 17:59:28,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 38 conjunts are in the unsatisfiable core [2020-10-19 17:59:28,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 17:59:29,111 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:29,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 17:59:29,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 20 [2020-10-19 17:59:29,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43115094] [2020-10-19 17:59:29,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-19 17:59:29,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:29,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-19 17:59:29,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2020-10-19 17:59:29,113 INFO L87 Difference]: Start difference. First operand 145 states and 168 transitions. Second operand 21 states. [2020-10-19 17:59:30,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:30,087 INFO L93 Difference]: Finished difference Result 246 states and 281 transitions. [2020-10-19 17:59:30,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-19 17:59:30,088 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 51 [2020-10-19 17:59:30,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:30,089 INFO L225 Difference]: With dead ends: 246 [2020-10-19 17:59:30,090 INFO L226 Difference]: Without dead ends: 246 [2020-10-19 17:59:30,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=157, Invalid=899, Unknown=0, NotChecked=0, Total=1056 [2020-10-19 17:59:30,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-19 17:59:30,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 177. [2020-10-19 17:59:30,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-19 17:59:30,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 211 transitions. [2020-10-19 17:59:30,095 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 211 transitions. Word has length 51 [2020-10-19 17:59:30,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:30,096 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 211 transitions. [2020-10-19 17:59:30,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-19 17:59:30,096 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 211 transitions. [2020-10-19 17:59:30,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-19 17:59:30,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:30,097 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2020-10-19 17:59:30,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:59:30,298 INFO L429 AbstractCegarLoop]: === Iteration 32 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, substringErr9REQUIRES_VIOLATION, substringErr4REQUIRES_VIOLATION, substringErr2REQUIRES_VIOLATION, substringErr3REQUIRES_VIOLATION, substringErr8REQUIRES_VIOLATION, substringErr1REQUIRES_VIOLATION, substringErr6REQUIRES_VIOLATION, substringErr7REQUIRES_VIOLATION, substringErr5REQUIRES_VIOLATION, substringErr0REQUIRES_VIOLATION]=== [2020-10-19 17:59:30,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:30,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1884414756, now seen corresponding path program 2 times [2020-10-19 17:59:30,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:30,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870857990] [2020-10-19 17:59:30,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:30,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:30,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:30,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:30,498 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-19 17:59:30,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870857990] [2020-10-19 17:59:30,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195469776] [2020-10-19 17:59:30,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:59:30,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 17:59:30,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 17:59:30,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-19 17:59:30,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 17:59:30,612 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 17:59:30,613 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-10-19 17:59:30,613 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 17:59:30,630 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-10-19 17:59:30,632 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-19 17:59:30,632 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-10-19 17:59:30,746 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-10-19 17:59:30,747 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 17:59:30,751 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 17:59:30,751 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 17:59:30,752 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2020-10-19 17:59:30,972 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2020-10-19 17:59:30,973 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-19 17:59:30,982 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 17:59:30,986 INFO L173 IndexEqualityManager]: detected equality via solver [2020-10-19 17:59:30,988 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 17:59:30,989 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2020-10-19 17:59:30,989 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-19 17:59:30,996 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 17:59:30,997 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 17:59:30,997 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:34, output treesize:3 [2020-10-19 17:59:31,048 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-19 17:59:31,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 17:59:31,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 26 [2020-10-19 17:59:31,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907700329] [2020-10-19 17:59:31,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-19 17:59:31,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:31,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-19 17:59:31,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=588, Unknown=0, NotChecked=0, Total=650 [2020-10-19 17:59:31,050 INFO L87 Difference]: Start difference. First operand 177 states and 211 transitions. Second operand 26 states. [2020-10-19 17:59:33,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:33,610 INFO L93 Difference]: Finished difference Result 284 states and 318 transitions. [2020-10-19 17:59:33,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-19 17:59:33,610 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 53 [2020-10-19 17:59:33,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:33,612 INFO L225 Difference]: With dead ends: 284 [2020-10-19 17:59:33,612 INFO L226 Difference]: Without dead ends: 275 [2020-10-19 17:59:33,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=537, Invalid=3623, Unknown=0, NotChecked=0, Total=4160 [2020-10-19 17:59:33,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-10-19 17:59:33,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 240. [2020-10-19 17:59:33,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-10-19 17:59:33,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 281 transitions. [2020-10-19 17:59:33,620 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 281 transitions. Word has length 53 [2020-10-19 17:59:33,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:33,620 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 281 transitions. [2020-10-19 17:59:33,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-19 17:59:33,620 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 281 transitions. [2020-10-19 17:59:33,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-19 17:59:33,621 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:33,621 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2020-10-19 17:59:33,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-10-19 17:59:33,827 INFO L429 AbstractCegarLoop]: === Iteration 33 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, substringErr9REQUIRES_VIOLATION, substringErr4REQUIRES_VIOLATION, substringErr2REQUIRES_VIOLATION, substringErr3REQUIRES_VIOLATION, substringErr8REQUIRES_VIOLATION, substringErr1REQUIRES_VIOLATION, substringErr6REQUIRES_VIOLATION, substringErr7REQUIRES_VIOLATION, substringErr5REQUIRES_VIOLATION, substringErr0REQUIRES_VIOLATION]=== [2020-10-19 17:59:33,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:33,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1459939393, now seen corresponding path program 2 times [2020-10-19 17:59:33,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:33,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204263387] [2020-10-19 17:59:33,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:33,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:33,858 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 35: A-local: [(substring_~ps~0.base_27 Int)], B-local: []. [2020-10-19 17:59:33,859 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 36: A-local: [(substring_~ps~0.base_27 Int)], B-local: []. [2020-10-19 17:59:33,859 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 37: A-local: [(substring_~ps~0.base_27 Int)], B-local: []. [2020-10-19 17:59:33,860 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 38: A-local: [(substring_~ps~0.base_27 Int)], B-local: []. [2020-10-19 17:59:33,861 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 39: A-local: [(substring_~ps~0.base_27 Int)], B-local: []. [2020-10-19 17:59:33,861 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 40: A-local: [(substring_~ps~0.base_27 Int)], B-local: []. [2020-10-19 17:59:33,861 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 41: A-local: [(substring_~ps~0.base_27 Int)], B-local: []. [2020-10-19 17:59:33,862 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 42: A-local: [(substring_~ps~0.base_27 Int)], B-local: []. [2020-10-19 17:59:33,862 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 43: A-local: [(substring_~ps~0.base_27 Int)], B-local: []. [2020-10-19 17:59:33,863 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 44: A-local: [(substring_~ps~0.base_27 Int)], B-local: []. [2020-10-19 17:59:33,863 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 45: A-local: [(substring_~ps~0.base_27 Int)], B-local: []. [2020-10-19 17:59:33,864 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 46: A-local: [(substring_~ps~0.base_27 Int)], B-local: []. [2020-10-19 17:59:33,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-19 17:59:33,867 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: generated interpolants did not pass sanity check at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:219) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:876) at de.uni_freiburg.informatik.ultimate.logic.NoopScript.getInterpolants(NoopScript.java:392) at de.uni_freiburg.informatik.ultimate.logic.NoopScript.getInterpolants(NoopScript.java:386) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.getInterpolants(ManagedScript.java:191) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:285) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:166) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:326) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:228) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:241) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-10-19 17:59:33,871 INFO L168 Benchmark]: Toolchain (without parser) took 33865.39 ms. Allocated memory was 1.0 GB in the beginning and 1.5 GB in the end (delta: 464.5 MB). Free memory was 955.9 MB in the beginning and 855.4 MB in the end (delta: 100.5 MB). Peak memory consumption was 565.1 MB. Max. memory is 11.5 GB. [2020-10-19 17:59:33,872 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 17:59:33,872 INFO L168 Benchmark]: CACSL2BoogieTranslator took 644.00 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 126.4 MB). Free memory was 950.6 MB in the beginning and 1.1 GB in the end (delta: -156.7 MB). Peak memory consumption was 20.6 MB. Max. memory is 11.5 GB. [2020-10-19 17:59:33,872 INFO L168 Benchmark]: Boogie Preprocessor took 66.15 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. [2020-10-19 17:59:33,873 INFO L168 Benchmark]: RCFGBuilder took 627.53 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 51.2 MB). Peak memory consumption was 51.2 MB. Max. memory is 11.5 GB. [2020-10-19 17:59:33,873 INFO L168 Benchmark]: TraceAbstraction took 32513.72 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 338.2 MB). Free memory was 1.0 GB in the beginning and 855.4 MB in the end (delta: 194.0 MB). Peak memory consumption was 532.1 MB. Max. memory is 11.5 GB. [2020-10-19 17:59:33,875 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 644.00 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 126.4 MB). Free memory was 950.6 MB in the beginning and 1.1 GB in the end (delta: -156.7 MB). Peak memory consumption was 20.6 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 66.15 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 627.53 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 51.2 MB). Peak memory consumption was 51.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 32513.72 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 338.2 MB). Free memory was 1.0 GB in the beginning and 855.4 MB in the end (delta: 194.0 MB). Peak memory consumption was 532.1 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: generated interpolants did not pass sanity check de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: generated interpolants did not pass sanity check: de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:219) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.25-906a4fb [2020-10-19 17:59:35,967 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 17:59:35,970 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 17:59:36,011 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 17:59:36,012 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 17:59:36,021 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 17:59:36,023 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 17:59:36,027 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 17:59:36,029 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 17:59:36,030 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 17:59:36,031 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 17:59:36,033 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 17:59:36,034 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 17:59:36,037 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 17:59:36,040 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 17:59:36,042 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 17:59:36,044 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 17:59:36,045 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 17:59:36,048 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 17:59:36,053 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 17:59:36,056 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 17:59:36,057 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 17:59:36,059 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 17:59:36,060 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 17:59:36,072 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 17:59:36,075 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 17:59:36,075 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 17:59:36,077 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 17:59:36,078 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 17:59:36,079 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 17:59:36,081 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 17:59:36,082 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 17:59:36,087 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 17:59:36,088 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 17:59:36,089 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 17:59:36,089 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 17:59:36,090 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 17:59:36,090 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 17:59:36,090 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 17:59:36,091 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 17:59:36,092 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 17:59:36,093 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2020-10-19 17:59:36,116 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 17:59:36,117 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 17:59:36,118 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 17:59:36,119 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 17:59:36,119 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 17:59:36,119 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 17:59:36,120 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 17:59:36,120 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-19 17:59:36,120 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 17:59:36,120 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 17:59:36,121 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 17:59:36,121 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-10-19 17:59:36,121 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-10-19 17:59:36,122 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-10-19 17:59:36,122 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 17:59:36,122 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-10-19 17:59:36,122 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-10-19 17:59:36,123 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-10-19 17:59:36,123 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 17:59:36,123 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 17:59:36,125 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 17:59:36,125 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 17:59:36,126 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 17:59:36,126 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 17:59:36,126 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 17:59:36,127 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 17:59:36,127 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 17:59:36,127 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-10-19 17:59:36,128 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-10-19 17:59:36,128 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 17:59:36,128 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-19 17:59:36,128 INFO L138 SettingsManager]: * Logic for external solver=AUFBV Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6e748b563bb7a11726b28f7957ce1a00b7c8807b [2020-10-19 17:59:36,481 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 17:59:36,492 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 17:59:36,497 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 17:59:36,499 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 17:59:36,500 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 17:59:36,501 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/substring-alloca-2.i [2020-10-19 17:59:36,572 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a61920f7/014bcb5fbd1c4b4890d234cf6386f5af/FLAGb9291794d [2020-10-19 17:59:37,087 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 17:59:37,089 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/substring-alloca-2.i [2020-10-19 17:59:37,116 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a61920f7/014bcb5fbd1c4b4890d234cf6386f5af/FLAGb9291794d [2020-10-19 17:59:37,416 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a61920f7/014bcb5fbd1c4b4890d234cf6386f5af [2020-10-19 17:59:37,420 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 17:59:37,427 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-19 17:59:37,428 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 17:59:37,429 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 17:59:37,432 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 17:59:37,433 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 05:59:37" (1/1) ... [2020-10-19 17:59:37,436 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57dbad91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:59:37, skipping insertion in model container [2020-10-19 17:59:37,436 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 05:59:37" (1/1) ... [2020-10-19 17:59:37,444 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 17:59:37,478 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 17:59:37,928 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 17:59:37,943 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 17:59:37,986 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 17:59:38,042 INFO L208 MainTranslator]: Completed translation [2020-10-19 17:59:38,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:59:38 WrapperNode [2020-10-19 17:59:38,043 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 17:59:38,044 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 17:59:38,044 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 17:59:38,044 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 17:59:38,059 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:59:38" (1/1) ... [2020-10-19 17:59:38,059 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:59:38" (1/1) ... [2020-10-19 17:59:38,078 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:59:38" (1/1) ... [2020-10-19 17:59:38,079 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:59:38" (1/1) ... [2020-10-19 17:59:38,095 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:59:38" (1/1) ... [2020-10-19 17:59:38,101 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:59:38" (1/1) ... [2020-10-19 17:59:38,105 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:59:38" (1/1) ... [2020-10-19 17:59:38,113 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 17:59:38,113 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 17:59:38,113 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 17:59:38,114 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 17:59:38,115 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:59:38" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 17:59:38,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-19 17:59:38,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 17:59:38,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2020-10-19 17:59:38,183 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-19 17:59:38,183 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-19 17:59:38,183 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-10-19 17:59:38,184 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-10-19 17:59:38,184 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-10-19 17:59:38,184 INFO L138 BoogieDeclarations]: Found implementation of procedure substring [2020-10-19 17:59:38,184 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-19 17:59:38,185 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-19 17:59:38,185 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-19 17:59:38,185 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-19 17:59:38,185 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-19 17:59:38,185 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-19 17:59:38,186 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-19 17:59:38,186 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-19 17:59:38,186 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-19 17:59:38,186 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-19 17:59:38,187 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-19 17:59:38,187 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-19 17:59:38,187 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-19 17:59:38,187 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-19 17:59:38,187 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-19 17:59:38,188 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-19 17:59:38,188 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-19 17:59:38,188 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-19 17:59:38,188 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-19 17:59:38,188 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-10-19 17:59:38,189 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-10-19 17:59:38,189 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-10-19 17:59:38,189 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-19 17:59:38,189 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-19 17:59:38,189 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-19 17:59:38,190 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-19 17:59:38,190 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-19 17:59:38,190 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-19 17:59:38,190 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-19 17:59:38,190 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-19 17:59:38,191 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-19 17:59:38,191 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-19 17:59:38,191 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-19 17:59:38,191 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-19 17:59:38,191 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-19 17:59:38,192 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-19 17:59:38,192 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-19 17:59:38,192 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-19 17:59:38,192 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-19 17:59:38,192 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-19 17:59:38,193 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-19 17:59:38,193 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-19 17:59:38,193 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-19 17:59:38,193 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-19 17:59:38,193 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-19 17:59:38,194 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-19 17:59:38,194 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-19 17:59:38,194 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-19 17:59:38,194 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-19 17:59:38,195 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-19 17:59:38,195 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-19 17:59:38,195 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-19 17:59:38,195 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-19 17:59:38,195 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-19 17:59:38,195 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-19 17:59:38,196 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-19 17:59:38,196 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-19 17:59:38,196 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-19 17:59:38,196 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-19 17:59:38,196 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-19 17:59:38,197 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-19 17:59:38,197 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-19 17:59:38,197 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-19 17:59:38,197 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-19 17:59:38,198 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-19 17:59:38,198 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-19 17:59:38,198 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-19 17:59:38,198 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-19 17:59:38,198 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-19 17:59:38,199 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-19 17:59:38,199 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-19 17:59:38,199 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-19 17:59:38,199 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-19 17:59:38,199 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-19 17:59:38,200 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-19 17:59:38,200 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-19 17:59:38,200 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-19 17:59:38,200 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-19 17:59:38,200 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-19 17:59:38,201 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-19 17:59:38,201 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-19 17:59:38,201 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-19 17:59:38,201 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-19 17:59:38,201 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-19 17:59:38,201 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-19 17:59:38,202 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-19 17:59:38,202 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-19 17:59:38,202 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-19 17:59:38,202 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-19 17:59:38,202 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-19 17:59:38,203 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-19 17:59:38,203 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-19 17:59:38,203 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-19 17:59:38,203 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-19 17:59:38,203 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-19 17:59:38,203 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-19 17:59:38,204 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-19 17:59:38,204 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-19 17:59:38,204 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-19 17:59:38,204 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-19 17:59:38,204 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-19 17:59:38,205 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-19 17:59:38,205 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-19 17:59:38,205 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-19 17:59:38,205 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-19 17:59:38,205 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-19 17:59:38,206 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-19 17:59:38,206 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-19 17:59:38,206 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-19 17:59:38,206 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-19 17:59:38,207 INFO L130 BoogieDeclarations]: Found specification of procedure substring [2020-10-19 17:59:38,207 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2020-10-19 17:59:38,207 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-19 17:59:38,207 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 17:59:38,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2020-10-19 17:59:38,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-19 17:59:38,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-19 17:59:38,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 17:59:38,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2020-10-19 17:59:38,873 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 17:59:38,874 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-19 17:59:38,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 05:59:38 BoogieIcfgContainer [2020-10-19 17:59:38,876 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 17:59:38,877 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 17:59:38,877 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 17:59:38,881 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 17:59:38,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 05:59:37" (1/3) ... [2020-10-19 17:59:38,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5872af2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 05:59:38, skipping insertion in model container [2020-10-19 17:59:38,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:59:38" (2/3) ... [2020-10-19 17:59:38,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5872af2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 05:59:38, skipping insertion in model container [2020-10-19 17:59:38,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 05:59:38" (3/3) ... [2020-10-19 17:59:38,885 INFO L111 eAbstractionObserver]: Analyzing ICFG substring-alloca-2.i [2020-10-19 17:59:38,896 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 17:59:38,904 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 19 error locations. [2020-10-19 17:59:38,919 INFO L253 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2020-10-19 17:59:38,940 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 17:59:38,941 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-19 17:59:38,941 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 17:59:38,941 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 17:59:38,942 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 17:59:38,942 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 17:59:38,942 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 17:59:38,942 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 17:59:38,958 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states. [2020-10-19 17:59:38,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-19 17:59:38,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:38,969 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:59:38,969 INFO L429 AbstractCegarLoop]: === Iteration 1 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, substringErr9REQUIRES_VIOLATION, substringErr4REQUIRES_VIOLATION, substringErr2REQUIRES_VIOLATION, substringErr3REQUIRES_VIOLATION, substringErr8REQUIRES_VIOLATION, substringErr1REQUIRES_VIOLATION, substringErr6REQUIRES_VIOLATION, substringErr7REQUIRES_VIOLATION, substringErr5REQUIRES_VIOLATION, substringErr0REQUIRES_VIOLATION]=== [2020-10-19 17:59:38,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:38,976 INFO L82 PathProgramCache]: Analyzing trace with hash 275578210, now seen corresponding path program 1 times [2020-10-19 17:59:38,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-19 17:59:38,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1736175277] [2020-10-19 17:59:38,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-10-19 17:59:39,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:39,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-19 17:59:39,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 17:59:39,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:39,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-19 17:59:39,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:39,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1736175277] [2020-10-19 17:59:39,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-19 17:59:39,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-10-19 17:59:39,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712346520] [2020-10-19 17:59:39,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-19 17:59:39,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-19 17:59:39,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 17:59:39,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-19 17:59:39,286 INFO L87 Difference]: Start difference. First operand 60 states. Second operand 6 states. [2020-10-19 17:59:39,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:39,424 INFO L93 Difference]: Finished difference Result 81 states and 91 transitions. [2020-10-19 17:59:39,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 17:59:39,427 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-10-19 17:59:39,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:39,439 INFO L225 Difference]: With dead ends: 81 [2020-10-19 17:59:39,440 INFO L226 Difference]: Without dead ends: 77 [2020-10-19 17:59:39,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-19 17:59:39,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-19 17:59:39,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 60. [2020-10-19 17:59:39,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-19 17:59:39,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2020-10-19 17:59:39,492 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 11 [2020-10-19 17:59:39,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:39,493 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2020-10-19 17:59:39,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-19 17:59:39,494 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2020-10-19 17:59:39,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-19 17:59:39,495 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:39,495 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:59:39,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-19 17:59:39,718 INFO L429 AbstractCegarLoop]: === Iteration 2 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, substringErr9REQUIRES_VIOLATION, substringErr4REQUIRES_VIOLATION, substringErr2REQUIRES_VIOLATION, substringErr3REQUIRES_VIOLATION, substringErr8REQUIRES_VIOLATION, substringErr1REQUIRES_VIOLATION, substringErr6REQUIRES_VIOLATION, substringErr7REQUIRES_VIOLATION, substringErr5REQUIRES_VIOLATION, substringErr0REQUIRES_VIOLATION]=== [2020-10-19 17:59:39,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:39,718 INFO L82 PathProgramCache]: Analyzing trace with hash 277425252, now seen corresponding path program 1 times [2020-10-19 17:59:39,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-19 17:59:39,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [116564207] [2020-10-19 17:59:39,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-10-19 17:59:39,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:39,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 17:59:39,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 17:59:39,918 INFO L350 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-10-19 17:59:39,919 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2020-10-19 17:59:39,921 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 17:59:39,930 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 17:59:39,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [116564207] [2020-10-19 17:59:39,933 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2020-10-19 17:59:39,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [585903461] [2020-10-19 17:59:39,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-19 17:59:40,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:40,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 17:59:40,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 17:59:40,184 INFO L350 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-10-19 17:59:40,185 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2020-10-19 17:59:40,188 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 17:59:40,201 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 17:59:40,204 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2020-10-19 17:59:40,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901433573] [2020-10-19 17:59:40,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:59:40,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:40,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 17:59:40,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 17:59:40,361 INFO L350 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-10-19 17:59:40,362 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2020-10-19 17:59:40,364 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 17:59:40,373 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 17:59:40,374 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2020-10-19 17:59:40,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-10-19 17:59:40,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-10-19 17:59:40,375 ERROR L205 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2020-10-19 17:59:40,375 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-19 17:59:40,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk,3 mathsat -unsat_core_generation=3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:59:40,998 WARN L238 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-10-19 17:59:40,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.10 05:59:40 BoogieIcfgContainer [2020-10-19 17:59:40,999 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-19 17:59:41,000 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 17:59:41,000 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 17:59:41,000 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 17:59:41,001 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 05:59:38" (3/4) ... [2020-10-19 17:59:41,005 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-19 17:59:41,005 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 17:59:41,007 INFO L168 Benchmark]: Toolchain (without parser) took 3585.49 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 153.6 MB). Free memory was 958.6 MB in the beginning and 913.0 MB in the end (delta: 45.6 MB). Peak memory consumption was 199.3 MB. Max. memory is 11.5 GB. [2020-10-19 17:59:41,008 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 17:59:41,009 INFO L168 Benchmark]: CACSL2BoogieTranslator took 614.84 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 153.6 MB). Free memory was 953.2 MB in the beginning and 1.1 GB in the end (delta: -183.6 MB). Peak memory consumption was 21.0 MB. Max. memory is 11.5 GB. [2020-10-19 17:59:41,010 INFO L168 Benchmark]: Boogie Preprocessor took 69.26 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 11.5 GB. [2020-10-19 17:59:41,011 INFO L168 Benchmark]: RCFGBuilder took 762.96 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 56.5 MB). Peak memory consumption was 56.5 MB. Max. memory is 11.5 GB. [2020-10-19 17:59:41,012 INFO L168 Benchmark]: TraceAbstraction took 2122.12 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 913.0 MB in the end (delta: 159.3 MB). Peak memory consumption was 159.3 MB. Max. memory is 11.5 GB. [2020-10-19 17:59:41,013 INFO L168 Benchmark]: Witness Printer took 5.84 ms. Allocated memory is still 1.2 GB. Free memory is still 913.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 17:59:41,016 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 614.84 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 153.6 MB). Free memory was 953.2 MB in the beginning and 1.1 GB in the end (delta: -183.6 MB). Peak memory consumption was 21.0 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 69.26 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 11.5 GB. * RCFGBuilder took 762.96 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 56.5 MB). Peak memory consumption was 56.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2122.12 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 913.0 MB in the end (delta: 159.3 MB). Peak memory consumption was 159.3 MB. Max. memory is 11.5 GB. * Witness Printer took 5.84 ms. Allocated memory is still 1.2 GB. Free memory is still 913.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 543]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L530] int length1 = __VERIFIER_nondet_int(); [L531] int length2 = __VERIFIER_nondet_int(); [L532] COND FALSE !(length1 < 1) [L535] COND TRUE length2 < 1 [L536] length2 = 1 [L538] char* nondetString1 = (char*) __builtin_alloca (length1 * sizeof(char)); [L539] char* nondetString2 = (char*) __builtin_alloca (length2 * sizeof(char)); [L541] int i = 0; [L541] COND TRUE i < length1 - 1 [L543] nondetString1[i] = __VERIFIER_nondet_char() - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 81 locations, 19 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 2.0s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 64 SDtfs, 73 SDslu, 156 SDs, 0 SdLazy, 28 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 17 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 11 NumberOfCodeBlocks, 11 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 510 SizeOfPredicates, 2 NumberOfNonLiveVariables, 48 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...