./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 9a8b2e8d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -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 -Xmx15G -Xms4m -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 0.1.25-9a8b2e8 [2020-10-20 05:51:49,618 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 05:51:49,621 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 05:51:49,646 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 05:51:49,646 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 05:51:49,647 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 05:51:49,658 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 05:51:49,661 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 05:51:49,662 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 05:51:49,663 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 05:51:49,665 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 05:51:49,666 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 05:51:49,666 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 05:51:49,667 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 05:51:49,668 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 05:51:49,670 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 05:51:49,671 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 05:51:49,672 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 05:51:49,673 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 05:51:49,675 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 05:51:49,677 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 05:51:49,678 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 05:51:49,679 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 05:51:49,680 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 05:51:49,684 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 05:51:49,687 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 05:51:49,687 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 05:51:49,688 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 05:51:49,689 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 05:51:49,691 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 05:51:49,692 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 05:51:49,693 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 05:51:49,695 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 05:51:49,696 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 05:51:49,698 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 05:51:49,703 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 05:51:49,704 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 05:51:49,704 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 05:51:49,705 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 05:51:49,705 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 05:51:49,706 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 05:51:49,709 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-10-20 05:51:49,750 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 05:51:49,751 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 05:51:49,752 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 05:51:49,753 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 05:51:49,753 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 05:51:49,754 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 05:51:49,754 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 05:51:49,754 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-20 05:51:49,754 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 05:51:49,755 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 05:51:49,756 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 05:51:49,756 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-10-20 05:51:49,756 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-10-20 05:51:49,757 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-10-20 05:51:49,757 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 05:51:49,757 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-10-20 05:51:49,758 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 05:51:49,758 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 05:51:49,758 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 05:51:49,758 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 05:51:49,759 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 05:51:49,759 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 05:51:49,759 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 05:51:49,760 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 05:51:49,760 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 05:51:49,760 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 05:51:49,760 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 05:51:49,761 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 05:51:49,761 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 [2020-10-20 05:51:50,006 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 05:51:50,027 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 05:51:50,031 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 05:51:50,033 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 05:51:50,033 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 05:51:50,034 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/substring-alloca-2.i [2020-10-20 05:51:50,098 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/721c8fb73/14d49054342e44c995e03d1747113ce4/FLAGf5ab62567 [2020-10-20 05:51:50,661 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 05:51:50,662 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/substring-alloca-2.i [2020-10-20 05:51:50,686 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/721c8fb73/14d49054342e44c995e03d1747113ce4/FLAGf5ab62567 [2020-10-20 05:51:50,963 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/721c8fb73/14d49054342e44c995e03d1747113ce4 [2020-10-20 05:51:50,967 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 05:51:50,973 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-20 05:51:50,975 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 05:51:50,975 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 05:51:50,979 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 05:51:50,980 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 05:51:50" (1/1) ... [2020-10-20 05:51:50,983 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a594219 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:51:50, skipping insertion in model container [2020-10-20 05:51:50,983 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 05:51:50" (1/1) ... [2020-10-20 05:51:50,992 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 05:51:51,032 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 05:51:51,471 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 05:51:51,485 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 05:51:51,563 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 05:51:51,641 INFO L208 MainTranslator]: Completed translation [2020-10-20 05:51:51,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:51:51 WrapperNode [2020-10-20 05:51:51,643 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 05:51:51,644 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 05:51:51,644 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 05:51:51,644 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 05:51:51,659 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:51:51" (1/1) ... [2020-10-20 05:51:51,659 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:51:51" (1/1) ... [2020-10-20 05:51:51,695 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:51:51" (1/1) ... [2020-10-20 05:51:51,696 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:51:51" (1/1) ... [2020-10-20 05:51:51,726 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:51:51" (1/1) ... [2020-10-20 05:51:51,731 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:51:51" (1/1) ... [2020-10-20 05:51:51,735 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:51:51" (1/1) ... [2020-10-20 05:51:51,742 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 05:51:51,743 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 05:51:51,743 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 05:51:51,743 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 05:51:51,744 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:51:51" (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 [2020-10-20 05:51:51,806 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-20 05:51:51,806 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 05:51:51,806 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-20 05:51:51,807 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-20 05:51:51,807 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-10-20 05:51:51,807 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-10-20 05:51:51,807 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-10-20 05:51:51,807 INFO L138 BoogieDeclarations]: Found implementation of procedure substring [2020-10-20 05:51:51,807 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-20 05:51:51,807 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-20 05:51:51,810 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-20 05:51:51,810 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-20 05:51:51,810 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-20 05:51:51,811 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-20 05:51:51,811 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-20 05:51:51,811 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-20 05:51:51,814 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-20 05:51:51,814 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-20 05:51:51,814 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-20 05:51:51,814 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-20 05:51:51,815 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-20 05:51:51,816 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-20 05:51:51,816 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-20 05:51:51,816 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-20 05:51:51,816 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-20 05:51:51,816 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-20 05:51:51,818 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-20 05:51:51,819 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-10-20 05:51:51,819 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-10-20 05:51:51,819 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-10-20 05:51:51,820 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-20 05:51:51,820 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-20 05:51:51,820 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-20 05:51:51,820 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-20 05:51:51,821 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-20 05:51:51,821 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-20 05:51:51,821 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-20 05:51:51,821 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-20 05:51:51,821 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-20 05:51:51,822 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-20 05:51:51,828 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-20 05:51:51,829 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-20 05:51:51,829 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-20 05:51:51,829 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-20 05:51:51,829 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-20 05:51:51,830 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-20 05:51:51,830 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-20 05:51:51,830 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-20 05:51:51,830 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-20 05:51:51,830 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-20 05:51:51,831 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-20 05:51:51,831 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-20 05:51:51,831 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-20 05:51:51,831 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-20 05:51:51,832 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-20 05:51:51,832 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-20 05:51:51,832 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-20 05:51:51,833 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-20 05:51:51,833 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-20 05:51:51,833 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-20 05:51:51,834 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-20 05:51:51,835 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-20 05:51:51,835 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-20 05:51:51,835 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-20 05:51:51,835 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-20 05:51:51,835 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-20 05:51:51,836 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-20 05:51:51,836 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-20 05:51:51,837 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-20 05:51:51,837 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-20 05:51:51,838 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-20 05:51:51,838 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-20 05:51:51,839 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-20 05:51:51,839 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-20 05:51:51,840 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-20 05:51:51,840 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-20 05:51:51,841 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-20 05:51:51,841 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-20 05:51:51,841 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-20 05:51:51,842 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-20 05:51:51,842 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-20 05:51:51,842 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-20 05:51:51,843 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-20 05:51:51,844 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-20 05:51:51,844 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-20 05:51:51,844 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-20 05:51:51,844 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-20 05:51:51,844 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-20 05:51:51,845 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-20 05:51:51,845 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-20 05:51:51,845 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-20 05:51:51,845 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-20 05:51:51,845 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-20 05:51:51,846 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-20 05:51:51,846 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-20 05:51:51,846 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-20 05:51:51,846 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-20 05:51:51,846 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-20 05:51:51,847 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-20 05:51:51,847 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-20 05:51:51,847 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-20 05:51:51,847 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-20 05:51:51,847 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-20 05:51:51,848 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-20 05:51:51,848 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-20 05:51:51,848 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-20 05:51:51,848 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-20 05:51:51,848 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-20 05:51:51,849 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-20 05:51:51,849 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-20 05:51:51,849 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-20 05:51:51,849 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-20 05:51:51,849 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-20 05:51:51,850 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-20 05:51:51,850 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-20 05:51:51,850 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-20 05:51:51,851 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-20 05:51:51,851 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-20 05:51:51,851 INFO L130 BoogieDeclarations]: Found specification of procedure substring [2020-10-20 05:51:51,851 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-20 05:51:51,851 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-20 05:51:51,852 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 05:51:51,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-20 05:51:51,853 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 05:51:51,853 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-20 05:51:51,853 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 05:51:52,392 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 05:51:52,393 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-20 05:51:52,395 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:51:52 BoogieIcfgContainer [2020-10-20 05:51:52,395 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 05:51:52,396 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 05:51:52,396 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 05:51:52,400 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 05:51:52,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 05:51:50" (1/3) ... [2020-10-20 05:51:52,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6551c428 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 05:51:52, skipping insertion in model container [2020-10-20 05:51:52,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:51:51" (2/3) ... [2020-10-20 05:51:52,402 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6551c428 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 05:51:52, skipping insertion in model container [2020-10-20 05:51:52,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:51:52" (3/3) ... [2020-10-20 05:51:52,404 INFO L111 eAbstractionObserver]: Analyzing ICFG substring-alloca-2.i [2020-10-20 05:51:52,415 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 05:51:52,423 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 19 error locations. [2020-10-20 05:51:52,434 INFO L253 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2020-10-20 05:51:52,462 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 05:51:52,462 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-20 05:51:52,462 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 05:51:52,462 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 05:51:52,462 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 05:51:52,463 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 05:51:52,463 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 05:51:52,463 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 05:51:52,480 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states. [2020-10-20 05:51:52,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 05:51:52,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:51:52,488 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:51:52,489 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]=== [2020-10-20 05:51:52,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:51:52,495 INFO L82 PathProgramCache]: Analyzing trace with hash -391744755, now seen corresponding path program 1 times [2020-10-20 05:51:52,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:51:52,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562064291] [2020-10-20 05:51:52,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:51:52,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:52,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:51:52,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:52,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:51:52,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562064291] [2020-10-20 05:51:52,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 05:51:52,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-20 05:51:52,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244950598] [2020-10-20 05:51:52,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 05:51:52,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:51:52,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 05:51:52,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-20 05:51:52,751 INFO L87 Difference]: Start difference. First operand 60 states. Second operand 5 states. [2020-10-20 05:51:53,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:51:53,050 INFO L93 Difference]: Finished difference Result 81 states and 91 transitions. [2020-10-20 05:51:53,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 05:51:53,052 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-10-20 05:51:53,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:51:53,076 INFO L225 Difference]: With dead ends: 81 [2020-10-20 05:51:53,076 INFO L226 Difference]: Without dead ends: 77 [2020-10-20 05:51:53,079 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 [2020-10-20 05:51:53,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-20 05:51:53,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 60. [2020-10-20 05:51:53,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-20 05:51:53,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2020-10-20 05:51:53,171 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 11 [2020-10-20 05:51:53,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:51:53,172 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2020-10-20 05:51:53,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 05:51:53,173 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2020-10-20 05:51:53,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 05:51:53,174 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:51:53,174 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:51:53,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 05:51:53,175 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]=== [2020-10-20 05:51:53,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:51:53,175 INFO L82 PathProgramCache]: Analyzing trace with hash -389897713, now seen corresponding path program 1 times [2020-10-20 05:51:53,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:51:53,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850678355] [2020-10-20 05:51:53,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:51:53,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:53,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:51:53,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:53,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:51:53,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850678355] [2020-10-20 05:51:53,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 05:51:53,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 05:51:53,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344430153] [2020-10-20 05:51:53,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 05:51:53,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:51:53,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 05:51:53,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-20 05:51:53,333 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand 5 states. [2020-10-20 05:51:53,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:51:53,552 INFO L93 Difference]: Finished difference Result 82 states and 92 transitions. [2020-10-20 05:51:53,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 05:51:53,553 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-10-20 05:51:53,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:51:53,555 INFO L225 Difference]: With dead ends: 82 [2020-10-20 05:51:53,555 INFO L226 Difference]: Without dead ends: 82 [2020-10-20 05:51:53,556 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 [2020-10-20 05:51:53,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-20 05:51:53,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 62. [2020-10-20 05:51:53,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-20 05:51:53,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2020-10-20 05:51:53,565 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 11 [2020-10-20 05:51:53,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:51:53,565 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2020-10-20 05:51:53,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 05:51:53,566 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2020-10-20 05:51:53,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 05:51:53,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:51:53,567 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:51:53,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 05:51:53,567 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]=== [2020-10-20 05:51:53,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:51:53,568 INFO L82 PathProgramCache]: Analyzing trace with hash -389897714, now seen corresponding path program 1 times [2020-10-20 05:51:53,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:51:53,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669399779] [2020-10-20 05:51:53,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:51:53,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:53,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:51:53,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:53,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:51:53,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669399779] [2020-10-20 05:51:53,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 05:51:53,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 05:51:53,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843153399] [2020-10-20 05:51:53,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 05:51:53,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:51:53,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 05:51:53,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 05:51:53,622 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand 4 states. [2020-10-20 05:51:53,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:51:53,738 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2020-10-20 05:51:53,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 05:51:53,739 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-10-20 05:51:53,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:51:53,740 INFO L225 Difference]: With dead ends: 60 [2020-10-20 05:51:53,740 INFO L226 Difference]: Without dead ends: 60 [2020-10-20 05:51:53,740 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 [2020-10-20 05:51:53,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-20 05:51:53,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-20 05:51:53,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-20 05:51:53,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2020-10-20 05:51:53,747 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 11 [2020-10-20 05:51:53,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:51:53,747 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2020-10-20 05:51:53,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 05:51:53,747 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2020-10-20 05:51:53,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-20 05:51:53,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:51:53,748 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:51:53,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-20 05:51:53,749 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]=== [2020-10-20 05:51:53,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:51:53,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1490361092, now seen corresponding path program 1 times [2020-10-20 05:51:53,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:51:53,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694958039] [2020-10-20 05:51:53,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:51:53,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:53,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:51:53,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:53,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:51:53,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694958039] [2020-10-20 05:51:53,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 05:51:53,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 05:51:53,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036236776] [2020-10-20 05:51:53,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 05:51:53,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:51:53,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 05:51:53,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-20 05:51:53,831 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand 5 states. [2020-10-20 05:51:53,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:51:53,975 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2020-10-20 05:51:53,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 05:51:53,975 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-20 05:51:53,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:51:53,976 INFO L225 Difference]: With dead ends: 59 [2020-10-20 05:51:53,977 INFO L226 Difference]: Without dead ends: 59 [2020-10-20 05:51:53,977 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 [2020-10-20 05:51:53,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-20 05:51:53,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-20 05:51:53,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-20 05:51:53,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2020-10-20 05:51:53,984 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 13 [2020-10-20 05:51:53,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:51:53,984 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2020-10-20 05:51:53,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 05:51:53,984 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2020-10-20 05:51:53,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-20 05:51:53,985 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:51:53,985 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:51:53,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-20 05:51:53,986 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]=== [2020-10-20 05:51:53,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:51:53,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1490361144, now seen corresponding path program 1 times [2020-10-20 05:51:53,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:51:53,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524664563] [2020-10-20 05:51:53,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:51:54,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:54,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:51:54,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:54,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:51:54,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524664563] [2020-10-20 05:51:54,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 05:51:54,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-20 05:51:54,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612463212] [2020-10-20 05:51:54,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 05:51:54,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:51:54,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 05:51:54,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-20 05:51:54,043 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand 5 states. [2020-10-20 05:51:54,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:51:54,185 INFO L93 Difference]: Finished difference Result 79 states and 90 transitions. [2020-10-20 05:51:54,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 05:51:54,185 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-20 05:51:54,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:51:54,186 INFO L225 Difference]: With dead ends: 79 [2020-10-20 05:51:54,187 INFO L226 Difference]: Without dead ends: 79 [2020-10-20 05:51:54,187 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 [2020-10-20 05:51:54,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-20 05:51:54,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2020-10-20 05:51:54,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-20 05:51:54,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 82 transitions. [2020-10-20 05:51:54,194 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 82 transitions. Word has length 13 [2020-10-20 05:51:54,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:51:54,195 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 82 transitions. [2020-10-20 05:51:54,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 05:51:54,195 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 82 transitions. [2020-10-20 05:51:54,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-20 05:51:54,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:51:54,196 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:51:54,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-20 05:51:54,197 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]=== [2020-10-20 05:51:54,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:51:54,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1547619446, now seen corresponding path program 1 times [2020-10-20 05:51:54,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:51:54,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401180154] [2020-10-20 05:51:54,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:51:54,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:54,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:51:54,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:54,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:51:54,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401180154] [2020-10-20 05:51:54,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 05:51:54,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 05:51:54,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424709871] [2020-10-20 05:51:54,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 05:51:54,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:51:54,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 05:51:54,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 05:51:54,243 INFO L87 Difference]: Start difference. First operand 70 states and 82 transitions. Second operand 4 states. [2020-10-20 05:51:54,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:51:54,356 INFO L93 Difference]: Finished difference Result 68 states and 80 transitions. [2020-10-20 05:51:54,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 05:51:54,356 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-20 05:51:54,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:51:54,357 INFO L225 Difference]: With dead ends: 68 [2020-10-20 05:51:54,357 INFO L226 Difference]: Without dead ends: 68 [2020-10-20 05:51:54,358 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 [2020-10-20 05:51:54,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-20 05:51:54,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-20 05:51:54,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-20 05:51:54,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 80 transitions. [2020-10-20 05:51:54,363 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 80 transitions. Word has length 13 [2020-10-20 05:51:54,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:51:54,364 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 80 transitions. [2020-10-20 05:51:54,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 05:51:54,364 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 80 transitions. [2020-10-20 05:51:54,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-20 05:51:54,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:51:54,365 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:51:54,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-20 05:51:54,365 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]=== [2020-10-20 05:51:54,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:51:54,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1547619447, now seen corresponding path program 1 times [2020-10-20 05:51:54,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:51:54,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140385696] [2020-10-20 05:51:54,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:51:54,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:54,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:51:54,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:54,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:51:54,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140385696] [2020-10-20 05:51:54,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 05:51:54,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-20 05:51:54,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292469280] [2020-10-20 05:51:54,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 05:51:54,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:51:54,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 05:51:54,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-20 05:51:54,440 INFO L87 Difference]: Start difference. First operand 68 states and 80 transitions. Second operand 6 states. [2020-10-20 05:51:54,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:51:54,606 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2020-10-20 05:51:54,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 05:51:54,607 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-10-20 05:51:54,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:51:54,608 INFO L225 Difference]: With dead ends: 79 [2020-10-20 05:51:54,608 INFO L226 Difference]: Without dead ends: 79 [2020-10-20 05:51:54,609 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 [2020-10-20 05:51:54,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-20 05:51:54,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2020-10-20 05:51:54,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-20 05:51:54,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 83 transitions. [2020-10-20 05:51:54,615 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 83 transitions. Word has length 13 [2020-10-20 05:51:54,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:51:54,615 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 83 transitions. [2020-10-20 05:51:54,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 05:51:54,616 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 83 transitions. [2020-10-20 05:51:54,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-20 05:51:54,617 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:51:54,617 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:51:54,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-20 05:51:54,617 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]=== [2020-10-20 05:51:54,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:51:54,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1043446404, now seen corresponding path program 1 times [2020-10-20 05:51:54,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:51:54,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481169158] [2020-10-20 05:51:54,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:51:54,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:54,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:51:54,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:54,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:51:54,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481169158] [2020-10-20 05:51:54,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 05:51:54,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 05:51:54,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447250948] [2020-10-20 05:51:54,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 05:51:54,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:51:54,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 05:51:54,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-20 05:51:54,675 INFO L87 Difference]: Start difference. First operand 70 states and 83 transitions. Second operand 5 states. [2020-10-20 05:51:54,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:51:54,796 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2020-10-20 05:51:54,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 05:51:54,797 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-20 05:51:54,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:51:54,798 INFO L225 Difference]: With dead ends: 69 [2020-10-20 05:51:54,798 INFO L226 Difference]: Without dead ends: 69 [2020-10-20 05:51:54,798 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 [2020-10-20 05:51:54,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-20 05:51:54,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-10-20 05:51:54,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-20 05:51:54,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 82 transitions. [2020-10-20 05:51:54,806 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 82 transitions. Word has length 14 [2020-10-20 05:51:54,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:51:54,807 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 82 transitions. [2020-10-20 05:51:54,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 05:51:54,810 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 82 transitions. [2020-10-20 05:51:54,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-20 05:51:54,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:51:54,811 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:51:54,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-20 05:51:54,811 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]=== [2020-10-20 05:51:54,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:51:54,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1553442094, now seen corresponding path program 1 times [2020-10-20 05:51:54,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:51:54,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234313723] [2020-10-20 05:51:54,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:51:54,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:54,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:51:54,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:54,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:51:54,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234313723] [2020-10-20 05:51:54,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096686420] [2020-10-20 05:51:54,955 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 [2020-10-20 05:51:55,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:55,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-20 05:51:55,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 05:51:55,132 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_24|], 1=[|v_#valid_33|]} [2020-10-20 05:51:55,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-20 05:51:55,159 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 [2020-10-20 05:51:55,160 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 05:51:55,170 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 05:51:55,178 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 [2020-10-20 05:51:55,185 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-20 05:51:55,194 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 05:51:55,196 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-20 05:51:55,197 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:24, output treesize:12 [2020-10-20 05:51:55,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:51:55,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 05:51:55,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-10-20 05:51:55,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982838873] [2020-10-20 05:51:55,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-20 05:51:55,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:51:55,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-20 05:51:55,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-20 05:51:55,228 INFO L87 Difference]: Start difference. First operand 69 states and 82 transitions. Second operand 7 states. [2020-10-20 05:51:55,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:51:55,411 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2020-10-20 05:51:55,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 05:51:55,412 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-10-20 05:51:55,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:51:55,413 INFO L225 Difference]: With dead ends: 88 [2020-10-20 05:51:55,413 INFO L226 Difference]: Without dead ends: 88 [2020-10-20 05:51:55,414 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 [2020-10-20 05:51:55,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-20 05:51:55,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 64. [2020-10-20 05:51:55,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-20 05:51:55,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2020-10-20 05:51:55,419 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 15 [2020-10-20 05:51:55,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:51:55,420 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2020-10-20 05:51:55,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-20 05:51:55,420 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2020-10-20 05:51:55,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-20 05:51:55,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:51:55,421 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:51:55,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-10-20 05:51:55,634 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]=== [2020-10-20 05:51:55,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:51:55,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1661532524, now seen corresponding path program 1 times [2020-10-20 05:51:55,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:51:55,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869467243] [2020-10-20 05:51:55,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:51:55,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:55,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:51:55,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:55,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:51:55,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869467243] [2020-10-20 05:51:55,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 05:51:55,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-20 05:51:55,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605906995] [2020-10-20 05:51:55,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 05:51:55,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:51:55,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 05:51:55,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-20 05:51:55,684 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand 6 states. [2020-10-20 05:51:55,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:51:55,825 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2020-10-20 05:51:55,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 05:51:55,825 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-20 05:51:55,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:51:55,826 INFO L225 Difference]: With dead ends: 63 [2020-10-20 05:51:55,826 INFO L226 Difference]: Without dead ends: 63 [2020-10-20 05:51:55,827 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 [2020-10-20 05:51:55,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-20 05:51:55,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-20 05:51:55,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-20 05:51:55,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2020-10-20 05:51:55,831 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 17 [2020-10-20 05:51:55,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:51:55,832 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2020-10-20 05:51:55,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 05:51:55,832 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2020-10-20 05:51:55,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-20 05:51:55,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:51:55,833 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:51:55,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-20 05:51:55,833 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]=== [2020-10-20 05:51:55,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:51:55,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1661532525, now seen corresponding path program 1 times [2020-10-20 05:51:55,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:51:55,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910073000] [2020-10-20 05:51:55,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:51:55,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:55,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:51:55,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:55,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:51:55,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910073000] [2020-10-20 05:51:55,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 05:51:55,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-20 05:51:55,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924408296] [2020-10-20 05:51:55,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-20 05:51:55,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:51:55,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-20 05:51:55,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-20 05:51:55,927 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand 8 states. [2020-10-20 05:51:56,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:51:56,186 INFO L93 Difference]: Finished difference Result 85 states and 99 transitions. [2020-10-20 05:51:56,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 05:51:56,187 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-10-20 05:51:56,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:51:56,191 INFO L225 Difference]: With dead ends: 85 [2020-10-20 05:51:56,191 INFO L226 Difference]: Without dead ends: 85 [2020-10-20 05:51:56,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-20 05:51:56,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-20 05:51:56,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 64. [2020-10-20 05:51:56,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-20 05:51:56,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2020-10-20 05:51:56,207 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 17 [2020-10-20 05:51:56,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:51:56,208 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2020-10-20 05:51:56,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-20 05:51:56,208 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2020-10-20 05:51:56,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-20 05:51:56,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:51:56,212 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:51:56,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-20 05:51:56,212 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]=== [2020-10-20 05:51:56,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:51:56,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1317111226, now seen corresponding path program 1 times [2020-10-20 05:51:56,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:51:56,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607363099] [2020-10-20 05:51:56,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:51:56,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:56,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:51:56,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:56,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:51:56,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607363099] [2020-10-20 05:51:56,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249591890] [2020-10-20 05:51:56,312 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 [2020-10-20 05:51:56,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:56,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 05:51:56,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 05:51:56,434 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 05:51:56,435 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 [2020-10-20 05:51:56,436 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 05:51:56,472 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-10-20 05:51:56,475 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-20 05:51:56,475 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-10-20 05:51:56,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:51:56,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 05:51:56,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2020-10-20 05:51:56,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974594736] [2020-10-20 05:51:56,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-20 05:51:56,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:51:56,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-20 05:51:56,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-20 05:51:56,510 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand 8 states. [2020-10-20 05:51:56,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:51:56,691 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2020-10-20 05:51:56,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 05:51:56,692 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-10-20 05:51:56,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:51:56,693 INFO L225 Difference]: With dead ends: 71 [2020-10-20 05:51:56,693 INFO L226 Difference]: Without dead ends: 71 [2020-10-20 05:51:56,693 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 [2020-10-20 05:51:56,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-20 05:51:56,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 61. [2020-10-20 05:51:56,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-20 05:51:56,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2020-10-20 05:51:56,701 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 17 [2020-10-20 05:51:56,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:51:56,701 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2020-10-20 05:51:56,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-20 05:51:56,701 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2020-10-20 05:51:56,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-20 05:51:56,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:51:56,703 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:51:56,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-10-20 05:51:56,913 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]=== [2020-10-20 05:51:56,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:51:56,914 INFO L82 PathProgramCache]: Analyzing trace with hash -995076911, now seen corresponding path program 1 times [2020-10-20 05:51:56,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:51:56,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845772651] [2020-10-20 05:51:56,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:51:56,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:56,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:51:56,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:56,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:51:56,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845772651] [2020-10-20 05:51:56,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 05:51:56,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-20 05:51:56,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125100270] [2020-10-20 05:51:56,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-20 05:51:56,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:51:56,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-20 05:51:56,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-20 05:51:56,966 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand 7 states. [2020-10-20 05:51:57,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:51:57,148 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2020-10-20 05:51:57,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 05:51:57,149 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-10-20 05:51:57,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:51:57,150 INFO L225 Difference]: With dead ends: 62 [2020-10-20 05:51:57,150 INFO L226 Difference]: Without dead ends: 62 [2020-10-20 05:51:57,150 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 [2020-10-20 05:51:57,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-20 05:51:57,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2020-10-20 05:51:57,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-20 05:51:57,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2020-10-20 05:51:57,158 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 19 [2020-10-20 05:51:57,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:51:57,159 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2020-10-20 05:51:57,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-20 05:51:57,159 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2020-10-20 05:51:57,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-20 05:51:57,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:51:57,165 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:51:57,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-20 05:51:57,166 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]=== [2020-10-20 05:51:57,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:51:57,166 INFO L82 PathProgramCache]: Analyzing trace with hash -995076910, now seen corresponding path program 1 times [2020-10-20 05:51:57,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:51:57,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046287593] [2020-10-20 05:51:57,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:51:57,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:57,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:51:57,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:57,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:51:57,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046287593] [2020-10-20 05:51:57,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 05:51:57,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-20 05:51:57,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035612208] [2020-10-20 05:51:57,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-20 05:51:57,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:51:57,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-20 05:51:57,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-20 05:51:57,280 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand 9 states. [2020-10-20 05:51:57,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:51:57,558 INFO L93 Difference]: Finished difference Result 75 states and 88 transitions. [2020-10-20 05:51:57,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-20 05:51:57,559 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-10-20 05:51:57,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:51:57,560 INFO L225 Difference]: With dead ends: 75 [2020-10-20 05:51:57,560 INFO L226 Difference]: Without dead ends: 75 [2020-10-20 05:51:57,560 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 [2020-10-20 05:51:57,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-20 05:51:57,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 66. [2020-10-20 05:51:57,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-20 05:51:57,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2020-10-20 05:51:57,563 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 19 [2020-10-20 05:51:57,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:51:57,564 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2020-10-20 05:51:57,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-20 05:51:57,564 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2020-10-20 05:51:57,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-20 05:51:57,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:51:57,565 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] [2020-10-20 05:51:57,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-20 05:51:57,566 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]=== [2020-10-20 05:51:57,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:51:57,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1744606647, now seen corresponding path program 1 times [2020-10-20 05:51:57,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:51:57,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992783035] [2020-10-20 05:51:57,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:51:57,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:57,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:51:57,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:57,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:51:57,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992783035] [2020-10-20 05:51:57,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 05:51:57,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 05:51:57,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947714038] [2020-10-20 05:51:57,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 05:51:57,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:51:57,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 05:51:57,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 05:51:57,600 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand 4 states. [2020-10-20 05:51:57,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:51:57,675 INFO L93 Difference]: Finished difference Result 68 states and 81 transitions. [2020-10-20 05:51:57,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 05:51:57,676 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-20 05:51:57,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:51:57,677 INFO L225 Difference]: With dead ends: 68 [2020-10-20 05:51:57,678 INFO L226 Difference]: Without dead ends: 68 [2020-10-20 05:51:57,678 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 [2020-10-20 05:51:57,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-20 05:51:57,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-20 05:51:57,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-20 05:51:57,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 81 transitions. [2020-10-20 05:51:57,685 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 81 transitions. Word has length 23 [2020-10-20 05:51:57,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:51:57,685 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 81 transitions. [2020-10-20 05:51:57,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 05:51:57,685 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 81 transitions. [2020-10-20 05:51:57,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-20 05:51:57,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:51:57,689 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] [2020-10-20 05:51:57,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-20 05:51:57,689 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]=== [2020-10-20 05:51:57,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:51:57,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1744615721, now seen corresponding path program 1 times [2020-10-20 05:51:57,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:51:57,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943794815] [2020-10-20 05:51:57,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:51:57,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:57,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:51:57,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:57,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:51:57,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943794815] [2020-10-20 05:51:57,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 05:51:57,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-20 05:51:57,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124176778] [2020-10-20 05:51:57,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-20 05:51:57,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:51:57,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-20 05:51:57,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-20 05:51:57,797 INFO L87 Difference]: Start difference. First operand 68 states and 81 transitions. Second operand 7 states. [2020-10-20 05:51:57,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:51:57,997 INFO L93 Difference]: Finished difference Result 71 states and 84 transitions. [2020-10-20 05:51:57,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 05:51:57,998 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-10-20 05:51:57,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:51:57,999 INFO L225 Difference]: With dead ends: 71 [2020-10-20 05:51:57,999 INFO L226 Difference]: Without dead ends: 71 [2020-10-20 05:51:58,000 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 [2020-10-20 05:51:58,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-20 05:51:58,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2020-10-20 05:51:58,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-20 05:51:58,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2020-10-20 05:51:58,006 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 23 [2020-10-20 05:51:58,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:51:58,007 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2020-10-20 05:51:58,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-20 05:51:58,007 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2020-10-20 05:51:58,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-20 05:51:58,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:51:58,013 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] [2020-10-20 05:51:58,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-20 05:51:58,014 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]=== [2020-10-20 05:51:58,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:51:58,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1744615720, now seen corresponding path program 1 times [2020-10-20 05:51:58,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:51:58,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162589029] [2020-10-20 05:51:58,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:51:58,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:58,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:51:58,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:58,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:51:58,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162589029] [2020-10-20 05:51:58,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 05:51:58,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-20 05:51:58,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294207775] [2020-10-20 05:51:58,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-20 05:51:58,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:51:58,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-20 05:51:58,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-20 05:51:58,112 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand 8 states. [2020-10-20 05:51:58,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:51:58,350 INFO L93 Difference]: Finished difference Result 103 states and 123 transitions. [2020-10-20 05:51:58,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-20 05:51:58,351 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-20 05:51:58,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:51:58,352 INFO L225 Difference]: With dead ends: 103 [2020-10-20 05:51:58,352 INFO L226 Difference]: Without dead ends: 103 [2020-10-20 05:51:58,353 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 [2020-10-20 05:51:58,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-20 05:51:58,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 73. [2020-10-20 05:51:58,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-20 05:51:58,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 87 transitions. [2020-10-20 05:51:58,356 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 87 transitions. Word has length 23 [2020-10-20 05:51:58,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:51:58,356 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 87 transitions. [2020-10-20 05:51:58,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-20 05:51:58,356 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 87 transitions. [2020-10-20 05:51:58,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-20 05:51:58,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:51:58,357 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] [2020-10-20 05:51:58,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-20 05:51:58,358 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]=== [2020-10-20 05:51:58,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:51:58,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1768533058, now seen corresponding path program 1 times [2020-10-20 05:51:58,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:51:58,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946611290] [2020-10-20 05:51:58,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:51:58,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:58,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:51:58,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:58,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-20 05:51:58,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:58,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:51:58,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946611290] [2020-10-20 05:51:58,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 05:51:58,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 05:51:58,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013874328] [2020-10-20 05:51:58,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 05:51:58,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:51:58,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 05:51:58,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-20 05:51:58,416 INFO L87 Difference]: Start difference. First operand 73 states and 87 transitions. Second operand 5 states. [2020-10-20 05:51:58,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:51:58,506 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2020-10-20 05:51:58,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 05:51:58,507 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-20 05:51:58,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:51:58,508 INFO L225 Difference]: With dead ends: 72 [2020-10-20 05:51:58,508 INFO L226 Difference]: Without dead ends: 67 [2020-10-20 05:51:58,508 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 [2020-10-20 05:51:58,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-20 05:51:58,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-20 05:51:58,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-20 05:51:58,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2020-10-20 05:51:58,512 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 23 [2020-10-20 05:51:58,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:51:58,512 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2020-10-20 05:51:58,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 05:51:58,513 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2020-10-20 05:51:58,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-20 05:51:58,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:51:58,514 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] [2020-10-20 05:51:58,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-20 05:51:58,514 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]=== [2020-10-20 05:51:58,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:51:58,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1529776103, now seen corresponding path program 1 times [2020-10-20 05:51:58,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:51:58,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641044584] [2020-10-20 05:51:58,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:51:58,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:58,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:51:58,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:58,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:51:58,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641044584] [2020-10-20 05:51:58,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 05:51:58,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-20 05:51:58,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490685160] [2020-10-20 05:51:58,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-20 05:51:58,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:51:58,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-20 05:51:58,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-20 05:51:58,574 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand 7 states. [2020-10-20 05:51:58,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:51:58,774 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2020-10-20 05:51:58,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-20 05:51:58,775 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-20 05:51:58,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:51:58,776 INFO L225 Difference]: With dead ends: 71 [2020-10-20 05:51:58,776 INFO L226 Difference]: Without dead ends: 68 [2020-10-20 05:51:58,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-20 05:51:58,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-20 05:51:58,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-10-20 05:51:58,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-20 05:51:58,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 77 transitions. [2020-10-20 05:51:58,780 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 77 transitions. Word has length 25 [2020-10-20 05:51:58,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:51:58,780 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 77 transitions. [2020-10-20 05:51:58,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-20 05:51:58,780 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 77 transitions. [2020-10-20 05:51:58,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-20 05:51:58,781 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:51:58,781 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] [2020-10-20 05:51:58,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-20 05:51:58,782 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]=== [2020-10-20 05:51:58,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:51:58,782 INFO L82 PathProgramCache]: Analyzing trace with hash -447626662, now seen corresponding path program 1 times [2020-10-20 05:51:58,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:51:58,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340459175] [2020-10-20 05:51:58,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:51:58,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:58,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:51:58,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:58,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 05:51:58,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340459175] [2020-10-20 05:51:58,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 05:51:58,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-20 05:51:58,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036933982] [2020-10-20 05:51:58,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-20 05:51:58,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:51:58,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-20 05:51:58,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-20 05:51:58,934 INFO L87 Difference]: Start difference. First operand 67 states and 77 transitions. Second operand 10 states. [2020-10-20 05:51:59,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:51:59,181 INFO L93 Difference]: Finished difference Result 80 states and 90 transitions. [2020-10-20 05:51:59,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-20 05:51:59,182 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-20 05:51:59,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:51:59,183 INFO L225 Difference]: With dead ends: 80 [2020-10-20 05:51:59,183 INFO L226 Difference]: Without dead ends: 62 [2020-10-20 05:51:59,183 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 [2020-10-20 05:51:59,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-20 05:51:59,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-20 05:51:59,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-20 05:51:59,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2020-10-20 05:51:59,186 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 26 [2020-10-20 05:51:59,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:51:59,186 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2020-10-20 05:51:59,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-20 05:51:59,186 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2020-10-20 05:51:59,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-20 05:51:59,187 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:51:59,187 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] [2020-10-20 05:51:59,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-20 05:51:59,187 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]=== [2020-10-20 05:51:59,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:51:59,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1265275112, now seen corresponding path program 1 times [2020-10-20 05:51:59,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:51:59,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915198150] [2020-10-20 05:51:59,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:51:59,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:59,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:51:59,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:59,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 05:51:59,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915198150] [2020-10-20 05:51:59,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 05:51:59,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-20 05:51:59,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097346269] [2020-10-20 05:51:59,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-20 05:51:59,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:51:59,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-20 05:51:59,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-20 05:51:59,363 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand 11 states. [2020-10-20 05:51:59,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:51:59,636 INFO L93 Difference]: Finished difference Result 83 states and 93 transitions. [2020-10-20 05:51:59,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-20 05:51:59,636 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-10-20 05:51:59,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:51:59,637 INFO L225 Difference]: With dead ends: 83 [2020-10-20 05:51:59,637 INFO L226 Difference]: Without dead ends: 70 [2020-10-20 05:51:59,638 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 [2020-10-20 05:51:59,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-20 05:51:59,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-10-20 05:51:59,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-20 05:51:59,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2020-10-20 05:51:59,641 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 26 [2020-10-20 05:51:59,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:51:59,641 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2020-10-20 05:51:59,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-20 05:51:59,641 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2020-10-20 05:51:59,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-20 05:51:59,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:51:59,642 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] [2020-10-20 05:51:59,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-20 05:51:59,642 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]=== [2020-10-20 05:51:59,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:51:59,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1692710901, now seen corresponding path program 1 times [2020-10-20 05:51:59,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:51:59,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784915037] [2020-10-20 05:51:59,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:51:59,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:59,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:51:59,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:51:59,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 05:51:59,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784915037] [2020-10-20 05:51:59,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 05:51:59,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-20 05:51:59,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998623226] [2020-10-20 05:51:59,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-20 05:51:59,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:51:59,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-20 05:51:59,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-20 05:51:59,791 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand 11 states. [2020-10-20 05:52:00,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:52:00,068 INFO L93 Difference]: Finished difference Result 73 states and 80 transitions. [2020-10-20 05:52:00,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-20 05:52:00,074 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-20 05:52:00,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:52:00,075 INFO L225 Difference]: With dead ends: 73 [2020-10-20 05:52:00,075 INFO L226 Difference]: Without dead ends: 56 [2020-10-20 05:52:00,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-10-20 05:52:00,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-20 05:52:00,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-20 05:52:00,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-20 05:52:00,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2020-10-20 05:52:00,078 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 30 [2020-10-20 05:52:00,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:52:00,078 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2020-10-20 05:52:00,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-20 05:52:00,079 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2020-10-20 05:52:00,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-20 05:52:00,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:52:00,079 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] [2020-10-20 05:52:00,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-20 05:52:00,080 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]=== [2020-10-20 05:52:00,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:52:00,082 INFO L82 PathProgramCache]: Analyzing trace with hash -112727433, now seen corresponding path program 1 times [2020-10-20 05:52:00,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:52:00,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438305313] [2020-10-20 05:52:00,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:52:00,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:52:00,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:52:00,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:52:00,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 05:52:00,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438305313] [2020-10-20 05:52:00,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 05:52:00,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-10-20 05:52:00,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978044507] [2020-10-20 05:52:00,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-20 05:52:00,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:52:00,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-20 05:52:00,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-20 05:52:00,303 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand 13 states. [2020-10-20 05:52:00,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:52:00,638 INFO L93 Difference]: Finished difference Result 69 states and 75 transitions. [2020-10-20 05:52:00,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-20 05:52:00,638 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-10-20 05:52:00,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:52:00,639 INFO L225 Difference]: With dead ends: 69 [2020-10-20 05:52:00,639 INFO L226 Difference]: Without dead ends: 60 [2020-10-20 05:52:00,640 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 [2020-10-20 05:52:00,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-20 05:52:00,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2020-10-20 05:52:00,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-20 05:52:00,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2020-10-20 05:52:00,641 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 30 [2020-10-20 05:52:00,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:52:00,642 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2020-10-20 05:52:00,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-20 05:52:00,642 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2020-10-20 05:52:00,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-20 05:52:00,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:52:00,642 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] [2020-10-20 05:52:00,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-20 05:52:00,643 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]=== [2020-10-20 05:52:00,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:52:00,643 INFO L82 PathProgramCache]: Analyzing trace with hash -147074924, now seen corresponding path program 1 times [2020-10-20 05:52:00,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:52:00,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014689535] [2020-10-20 05:52:00,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:52:00,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:52:00,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:52:00,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:52:00,761 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 05:52:00,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014689535] [2020-10-20 05:52:00,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026041060] [2020-10-20 05:52:00,762 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 [2020-10-20 05:52:00,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:52:00,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-20 05:52:00,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 05:52:00,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 05:52:00,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 05:52:00,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-10-20 05:52:00,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477650270] [2020-10-20 05:52:00,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-20 05:52:00,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:52:00,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-20 05:52:00,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-10-20 05:52:00,998 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand 17 states. [2020-10-20 05:52:01,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:52:01,388 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2020-10-20 05:52:01,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-20 05:52:01,388 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 34 [2020-10-20 05:52:01,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:52:01,389 INFO L225 Difference]: With dead ends: 80 [2020-10-20 05:52:01,390 INFO L226 Difference]: Without dead ends: 78 [2020-10-20 05:52:01,390 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 [2020-10-20 05:52:01,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-20 05:52:01,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 64. [2020-10-20 05:52:01,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-20 05:52:01,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2020-10-20 05:52:01,392 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 34 [2020-10-20 05:52:01,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:52:01,393 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2020-10-20 05:52:01,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-20 05:52:01,393 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2020-10-20 05:52:01,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-20 05:52:01,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:52:01,393 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] [2020-10-20 05:52:01,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-20 05:52:01,603 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]=== [2020-10-20 05:52:01,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:52:01,604 INFO L82 PathProgramCache]: Analyzing trace with hash 394885028, now seen corresponding path program 1 times [2020-10-20 05:52:01,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:52:01,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957855860] [2020-10-20 05:52:01,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:52:01,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:52:01,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:52:01,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:52:01,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 05:52:01,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957855860] [2020-10-20 05:52:01,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799897319] [2020-10-20 05:52:01,700 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 [2020-10-20 05:52:01,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:52:01,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-20 05:52:01,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 05:52:01,957 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 05:52:01,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 05:52:01,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-10-20 05:52:01,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353023383] [2020-10-20 05:52:01,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-20 05:52:01,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:52:01,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-20 05:52:01,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-10-20 05:52:01,961 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand 15 states. [2020-10-20 05:52:02,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:52:02,376 INFO L93 Difference]: Finished difference Result 124 states and 143 transitions. [2020-10-20 05:52:02,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-20 05:52:02,376 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2020-10-20 05:52:02,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:52:02,377 INFO L225 Difference]: With dead ends: 124 [2020-10-20 05:52:02,377 INFO L226 Difference]: Without dead ends: 124 [2020-10-20 05:52:02,378 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 [2020-10-20 05:52:02,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-20 05:52:02,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 84. [2020-10-20 05:52:02,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-20 05:52:02,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 101 transitions. [2020-10-20 05:52:02,381 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 101 transitions. Word has length 36 [2020-10-20 05:52:02,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:52:02,382 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 101 transitions. [2020-10-20 05:52:02,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-20 05:52:02,382 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 101 transitions. [2020-10-20 05:52:02,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-20 05:52:02,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:52:02,383 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] [2020-10-20 05:52:02,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 05:52:02,593 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]=== [2020-10-20 05:52:02,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:52:02,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1560744346, now seen corresponding path program 1 times [2020-10-20 05:52:02,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:52:02,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293665694] [2020-10-20 05:52:02,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:52:02,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:52:02,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:52:02,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:52:02,709 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 05:52:02,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293665694] [2020-10-20 05:52:02,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433434140] [2020-10-20 05:52:02,710 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 [2020-10-20 05:52:02,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:52:02,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-20 05:52:02,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 05:52:02,973 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 05:52:02,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 05:52:02,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-10-20 05:52:02,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548597356] [2020-10-20 05:52:02,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-20 05:52:02,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:52:02,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-20 05:52:02,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-10-20 05:52:02,975 INFO L87 Difference]: Start difference. First operand 84 states and 101 transitions. Second operand 17 states. [2020-10-20 05:52:03,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:52:03,542 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2020-10-20 05:52:03,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-20 05:52:03,545 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 38 [2020-10-20 05:52:03,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:52:03,546 INFO L225 Difference]: With dead ends: 100 [2020-10-20 05:52:03,546 INFO L226 Difference]: Without dead ends: 100 [2020-10-20 05:52:03,547 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 [2020-10-20 05:52:03,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-20 05:52:03,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 84. [2020-10-20 05:52:03,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-20 05:52:03,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2020-10-20 05:52:03,550 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 38 [2020-10-20 05:52:03,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:52:03,550 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2020-10-20 05:52:03,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-20 05:52:03,550 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2020-10-20 05:52:03,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-20 05:52:03,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:52:03,551 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] [2020-10-20 05:52:03,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-20 05:52:03,752 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]=== [2020-10-20 05:52:03,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:52:03,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1181095848, now seen corresponding path program 2 times [2020-10-20 05:52:03,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:52:03,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937513991] [2020-10-20 05:52:03,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:52:03,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:52:04,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:52:04,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:52:04,014 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 05:52:04,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937513991] [2020-10-20 05:52:04,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329784335] [2020-10-20 05:52:04,015 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 [2020-10-20 05:52:04,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 05:52:04,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 05:52:04,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 58 conjunts are in the unsatisfiable core [2020-10-20 05:52:04,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 05:52:04,139 INFO L350 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-10-20 05:52:04,139 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 [2020-10-20 05:52:04,141 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 05:52:04,149 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 05:52:04,149 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-20 05:52:04,149 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:21 [2020-10-20 05:52:04,297 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 [2020-10-20 05:52:04,297 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 05:52:04,309 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 05:52:04,311 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. [2020-10-20 05:52:04,311 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:34 [2020-10-20 05:52:04,379 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 [2020-10-20 05:52:04,380 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 05:52:04,397 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 05:52:04,400 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. [2020-10-20 05:52:04,400 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:48, output treesize:44 [2020-10-20 05:52:04,895 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 [2020-10-20 05:52:04,896 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 05:52:04,911 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 05:52:04,914 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. [2020-10-20 05:52:04,914 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:59, output treesize:49 [2020-10-20 05:52:05,504 WARN L193 SmtUtils]: Spent 433.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-10-20 05:52:05,758 INFO L173 IndexEqualityManager]: detected equality via solver [2020-10-20 05:52:05,763 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 05:52:05,764 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 [2020-10-20 05:52:05,768 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 05:52:05,803 INFO L625 ElimStorePlain]: treesize reduction 4, result has 90.0 percent of original size [2020-10-20 05:52:05,805 INFO L545 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-20 05:52:05,806 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 9 variables, input treesize:64, output treesize:8 [2020-10-20 05:52:05,849 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 05:52:05,870 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 05:52:05,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 05:52:05,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 31 [2020-10-20 05:52:05,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47127552] [2020-10-20 05:52:05,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-20 05:52:05,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:52:05,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-20 05:52:05,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=859, Unknown=0, NotChecked=0, Total=930 [2020-10-20 05:52:05,873 INFO L87 Difference]: Start difference. First operand 84 states and 100 transitions. Second operand 31 states. [2020-10-20 05:52:07,350 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2020-10-20 05:52:08,171 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 82 [2020-10-20 05:52:08,463 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 83 [2020-10-20 05:52:08,720 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 85 [2020-10-20 05:52:08,904 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2020-10-20 05:52:09,203 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 88 [2020-10-20 05:52:11,282 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 94 DAG size of output: 94 [2020-10-20 05:52:11,616 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 91 [2020-10-20 05:52:11,931 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 95 [2020-10-20 05:52:12,248 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 97 [2020-10-20 05:52:15,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:52:15,371 INFO L93 Difference]: Finished difference Result 243 states and 270 transitions. [2020-10-20 05:52:15,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-20 05:52:15,372 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 41 [2020-10-20 05:52:15,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:52:15,374 INFO L225 Difference]: With dead ends: 243 [2020-10-20 05:52:15,374 INFO L226 Difference]: Without dead ends: 231 [2020-10-20 05:52:15,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1527 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=622, Invalid=5540, Unknown=0, NotChecked=0, Total=6162 [2020-10-20 05:52:15,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-20 05:52:15,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 149. [2020-10-20 05:52:15,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-20 05:52:15,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 172 transitions. [2020-10-20 05:52:15,382 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 172 transitions. Word has length 41 [2020-10-20 05:52:15,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:52:15,383 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 172 transitions. [2020-10-20 05:52:15,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-20 05:52:15,383 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 172 transitions. [2020-10-20 05:52:15,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-20 05:52:15,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:52:15,384 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] [2020-10-20 05:52:15,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 05:52:15,594 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]=== [2020-10-20 05:52:15,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:52:15,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1692139569, now seen corresponding path program 1 times [2020-10-20 05:52:15,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:52:15,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796607782] [2020-10-20 05:52:15,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:52:15,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:52:15,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:52:15,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:52:15,730 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 05:52:15,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796607782] [2020-10-20 05:52:15,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105688373] [2020-10-20 05:52:15,731 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 [2020-10-20 05:52:15,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:52:15,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-20 05:52:15,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 05:52:15,953 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 05:52:15,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 05:52:15,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-10-20 05:52:15,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318304230] [2020-10-20 05:52:15,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-20 05:52:15,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:52:15,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-20 05:52:15,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-20 05:52:15,955 INFO L87 Difference]: Start difference. First operand 149 states and 172 transitions. Second operand 16 states. [2020-10-20 05:52:16,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:52:16,462 INFO L93 Difference]: Finished difference Result 203 states and 228 transitions. [2020-10-20 05:52:16,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-20 05:52:16,464 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2020-10-20 05:52:16,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:52:16,466 INFO L225 Difference]: With dead ends: 203 [2020-10-20 05:52:16,466 INFO L226 Difference]: Without dead ends: 203 [2020-10-20 05:52:16,466 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 [2020-10-20 05:52:16,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-20 05:52:16,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 161. [2020-10-20 05:52:16,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-20 05:52:16,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 184 transitions. [2020-10-20 05:52:16,472 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 184 transitions. Word has length 42 [2020-10-20 05:52:16,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:52:16,473 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 184 transitions. [2020-10-20 05:52:16,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-20 05:52:16,473 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 184 transitions. [2020-10-20 05:52:16,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-20 05:52:16,474 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:52:16,474 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] [2020-10-20 05:52:16,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-20 05:52:16,686 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]=== [2020-10-20 05:52:16,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:52:16,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1777949011, now seen corresponding path program 2 times [2020-10-20 05:52:16,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:52:16,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47114473] [2020-10-20 05:52:16,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:52:16,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:52:16,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:52:16,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:52:16,951 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 05:52:16,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47114473] [2020-10-20 05:52:16,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42984597] [2020-10-20 05:52:16,951 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 [2020-10-20 05:52:17,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 05:52:17,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 05:52:17,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-20 05:52:17,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 05:52:17,064 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 [2020-10-20 05:52:17,065 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 05:52:17,069 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 05:52:17,069 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-20 05:52:17,069 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-10-20 05:52:17,171 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 [2020-10-20 05:52:17,171 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 05:52:17,177 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 05:52:17,179 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. [2020-10-20 05:52:17,179 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2020-10-20 05:52:17,217 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 [2020-10-20 05:52:17,218 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 05:52:17,227 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 05:52:17,229 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. [2020-10-20 05:52:17,229 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:35, output treesize:31 [2020-10-20 05:52:17,538 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 05:52:17,538 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 [2020-10-20 05:52:17,539 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-10-20 05:52:17,554 INFO L625 ElimStorePlain]: treesize reduction 8, result has 63.6 percent of original size [2020-10-20 05:52:17,557 INFO L545 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-20 05:52:17,557 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:38, output treesize:3 [2020-10-20 05:52:17,568 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 05:52:17,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 05:52:17,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2020-10-20 05:52:17,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510354605] [2020-10-20 05:52:17,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-20 05:52:17,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:52:17,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-20 05:52:17,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2020-10-20 05:52:17,571 INFO L87 Difference]: Start difference. First operand 161 states and 184 transitions. Second operand 22 states. [2020-10-20 05:52:18,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:52:18,539 INFO L93 Difference]: Finished difference Result 185 states and 206 transitions. [2020-10-20 05:52:18,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-20 05:52:18,540 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 47 [2020-10-20 05:52:18,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:52:18,541 INFO L225 Difference]: With dead ends: 185 [2020-10-20 05:52:18,542 INFO L226 Difference]: Without dead ends: 134 [2020-10-20 05:52:18,542 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 [2020-10-20 05:52:18,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-20 05:52:18,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 131. [2020-10-20 05:52:18,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-20 05:52:18,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 150 transitions. [2020-10-20 05:52:18,547 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 150 transitions. Word has length 47 [2020-10-20 05:52:18,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:52:18,547 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 150 transitions. [2020-10-20 05:52:18,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-20 05:52:18,548 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 150 transitions. [2020-10-20 05:52:18,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-20 05:52:18,548 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:52:18,549 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] [2020-10-20 05:52:18,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-20 05:52:18,761 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]=== [2020-10-20 05:52:18,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:52:18,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1307637534, now seen corresponding path program 3 times [2020-10-20 05:52:18,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:52:18,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790907053] [2020-10-20 05:52:18,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:52:18,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:52:18,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:52:18,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:52:18,906 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-20 05:52:18,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790907053] [2020-10-20 05:52:18,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487330326] [2020-10-20 05:52:18,907 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 [2020-10-20 05:52:19,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-20 05:52:19,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 05:52:19,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-20 05:52:19,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 05:52:19,223 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-20 05:52:19,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 05:52:19,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2020-10-20 05:52:19,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005857723] [2020-10-20 05:52:19,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-20 05:52:19,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:52:19,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-20 05:52:19,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2020-10-20 05:52:19,224 INFO L87 Difference]: Start difference. First operand 131 states and 150 transitions. Second operand 22 states. [2020-10-20 05:52:20,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:52:20,020 INFO L93 Difference]: Finished difference Result 177 states and 196 transitions. [2020-10-20 05:52:20,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-20 05:52:20,020 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 49 [2020-10-20 05:52:20,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:52:20,022 INFO L225 Difference]: With dead ends: 177 [2020-10-20 05:52:20,022 INFO L226 Difference]: Without dead ends: 175 [2020-10-20 05:52:20,023 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 [2020-10-20 05:52:20,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-20 05:52:20,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 145. [2020-10-20 05:52:20,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-20 05:52:20,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 168 transitions. [2020-10-20 05:52:20,029 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 168 transitions. Word has length 49 [2020-10-20 05:52:20,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:52:20,029 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 168 transitions. [2020-10-20 05:52:20,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-20 05:52:20,029 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 168 transitions. [2020-10-20 05:52:20,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-20 05:52:20,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:52:20,030 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] [2020-10-20 05:52:20,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 05:52:20,231 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]=== [2020-10-20 05:52:20,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:52:20,232 INFO L82 PathProgramCache]: Analyzing trace with hash -426369642, now seen corresponding path program 3 times [2020-10-20 05:52:20,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:52:20,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711065799] [2020-10-20 05:52:20,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:52:20,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:52:20,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:52:20,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:52:20,361 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 05:52:20,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711065799] [2020-10-20 05:52:20,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370490944] [2020-10-20 05:52:20,362 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 [2020-10-20 05:52:20,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-20 05:52:20,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 05:52:20,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 38 conjunts are in the unsatisfiable core [2020-10-20 05:52:20,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 05:52:20,732 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:52:20,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 05:52:20,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 20 [2020-10-20 05:52:20,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968819677] [2020-10-20 05:52:20,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-20 05:52:20,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:52:20,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-20 05:52:20,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2020-10-20 05:52:20,733 INFO L87 Difference]: Start difference. First operand 145 states and 168 transitions. Second operand 21 states. [2020-10-20 05:52:21,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:52:21,687 INFO L93 Difference]: Finished difference Result 246 states and 281 transitions. [2020-10-20 05:52:21,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-20 05:52:21,688 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 51 [2020-10-20 05:52:21,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:52:21,690 INFO L225 Difference]: With dead ends: 246 [2020-10-20 05:52:21,690 INFO L226 Difference]: Without dead ends: 246 [2020-10-20 05:52:21,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=157, Invalid=899, Unknown=0, NotChecked=0, Total=1056 [2020-10-20 05:52:21,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-20 05:52:21,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 177. [2020-10-20 05:52:21,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-20 05:52:21,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 211 transitions. [2020-10-20 05:52:21,697 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 211 transitions. Word has length 51 [2020-10-20 05:52:21,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:52:21,697 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 211 transitions. [2020-10-20 05:52:21,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-20 05:52:21,698 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 211 transitions. [2020-10-20 05:52:21,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-20 05:52:21,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:52:21,699 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] [2020-10-20 05:52:21,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 05:52:21,911 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]=== [2020-10-20 05:52:21,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:52:21,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1884414756, now seen corresponding path program 2 times [2020-10-20 05:52:21,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:52:21,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815824960] [2020-10-20 05:52:21,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:52:21,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:52:22,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:52:22,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:52:22,063 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-20 05:52:22,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815824960] [2020-10-20 05:52:22,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003338373] [2020-10-20 05:52:22,064 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 [2020-10-20 05:52:22,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 05:52:22,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 05:52:22,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-20 05:52:22,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 05:52:22,192 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 05:52:22,193 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 [2020-10-20 05:52:22,193 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 05:52:22,213 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-10-20 05:52:22,215 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-20 05:52:22,215 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-10-20 05:52:22,341 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 [2020-10-20 05:52:22,342 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 05:52:22,347 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 05:52:22,348 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-20 05:52:22,348 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2020-10-20 05:52:22,594 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 [2020-10-20 05:52:22,595 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-20 05:52:22,606 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 05:52:22,610 INFO L173 IndexEqualityManager]: detected equality via solver [2020-10-20 05:52:22,612 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 05:52:22,613 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 [2020-10-20 05:52:22,613 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-20 05:52:22,622 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 05:52:22,624 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. [2020-10-20 05:52:22,624 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:34, output treesize:3 [2020-10-20 05:52:22,684 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-20 05:52:22,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 05:52:22,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 26 [2020-10-20 05:52:22,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978057571] [2020-10-20 05:52:22,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-20 05:52:22,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:52:22,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-20 05:52:22,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=588, Unknown=0, NotChecked=0, Total=650 [2020-10-20 05:52:22,687 INFO L87 Difference]: Start difference. First operand 177 states and 211 transitions. Second operand 26 states. [2020-10-20 05:52:25,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:52:25,501 INFO L93 Difference]: Finished difference Result 284 states and 318 transitions. [2020-10-20 05:52:25,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-20 05:52:25,502 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 53 [2020-10-20 05:52:25,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:52:25,503 INFO L225 Difference]: With dead ends: 284 [2020-10-20 05:52:25,504 INFO L226 Difference]: Without dead ends: 275 [2020-10-20 05:52:25,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=537, Invalid=3623, Unknown=0, NotChecked=0, Total=4160 [2020-10-20 05:52:25,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-10-20 05:52:25,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 240. [2020-10-20 05:52:25,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-10-20 05:52:25,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 281 transitions. [2020-10-20 05:52:25,511 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 281 transitions. Word has length 53 [2020-10-20 05:52:25,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:52:25,512 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 281 transitions. [2020-10-20 05:52:25,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-20 05:52:25,512 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 281 transitions. [2020-10-20 05:52:25,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-20 05:52:25,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:52:25,513 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] [2020-10-20 05:52:25,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-10-20 05:52:25,726 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]=== [2020-10-20 05:52:25,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:52:25,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1459939393, now seen corresponding path program 2 times [2020-10-20 05:52:25,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:52:25,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049218844] [2020-10-20 05:52:25,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:52:25,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:52:25,772 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 35: A-local: [(substring_~ps~0.base_27 Int)], B-local: []. [2020-10-20 05:52:25,773 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 36: A-local: [(substring_~ps~0.base_27 Int)], B-local: []. [2020-10-20 05:52:25,774 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 37: A-local: [(substring_~ps~0.base_27 Int)], B-local: []. [2020-10-20 05:52:25,774 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 38: A-local: [(substring_~ps~0.base_27 Int)], B-local: []. [2020-10-20 05:52:25,775 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 39: A-local: [(substring_~ps~0.base_27 Int)], B-local: []. [2020-10-20 05:52:25,776 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 40: A-local: [(substring_~ps~0.base_27 Int)], B-local: []. [2020-10-20 05:52:25,776 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 41: A-local: [(substring_~ps~0.base_27 Int)], B-local: []. [2020-10-20 05:52:25,777 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 42: A-local: [(substring_~ps~0.base_27 Int)], B-local: []. [2020-10-20 05:52:25,778 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 43: A-local: [(substring_~ps~0.base_27 Int)], B-local: []. [2020-10-20 05:52:25,778 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 44: A-local: [(substring_~ps~0.base_27 Int)], B-local: []. [2020-10-20 05:52:25,779 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 45: A-local: [(substring_~ps~0.base_27 Int)], B-local: []. [2020-10-20 05:52:25,779 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 46: A-local: [(substring_~ps~0.base_27 Int)], B-local: []. [2020-10-20 05:52:25,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-20 05:52:25,784 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) [2020-10-20 05:52:25,799 INFO L168 Benchmark]: Toolchain (without parser) took 34830.65 ms. Allocated memory was 34.1 MB in the beginning and 131.6 MB in the end (delta: 97.5 MB). Free memory was 9.9 MB in the beginning and 106.2 MB in the end (delta: -96.2 MB). Peak memory consumption was 103.1 MB. Max. memory is 14.3 GB. [2020-10-20 05:52:25,801 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 33.6 MB. Free memory was 18.4 MB in the beginning and 18.3 MB in the end (delta: 41.9 kB). Peak memory consumption was 41.9 kB. Max. memory is 14.3 GB. [2020-10-20 05:52:25,802 INFO L168 Benchmark]: CACSL2BoogieTranslator took 668.71 ms. Allocated memory was 34.1 MB in the beginning and 45.1 MB in the end (delta: 11.0 MB). Free memory was 9.1 MB in the beginning and 20.0 MB in the end (delta: -10.9 MB). Peak memory consumption was 8.7 MB. Max. memory is 14.3 GB. [2020-10-20 05:52:25,802 INFO L168 Benchmark]: Boogie Preprocessor took 98.65 ms. Allocated memory is still 45.1 MB. Free memory was 20.0 MB in the beginning and 17.2 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 14.3 GB. [2020-10-20 05:52:25,803 INFO L168 Benchmark]: RCFGBuilder took 652.61 ms. Allocated memory was 45.1 MB in the beginning and 47.2 MB in the end (delta: 2.1 MB). Free memory was 17.2 MB in the beginning and 14.5 MB in the end (delta: 2.7 MB). Peak memory consumption was 8.1 MB. Max. memory is 14.3 GB. [2020-10-20 05:52:25,803 INFO L168 Benchmark]: TraceAbstraction took 33394.49 ms. Allocated memory was 47.2 MB in the beginning and 131.6 MB in the end (delta: 84.4 MB). Free memory was 13.9 MB in the beginning and 4.6 MB in the end (delta: 9.3 MB). Peak memory consumption was 93.7 MB. Max. memory is 14.3 GB. [2020-10-20 05:52:25,809 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 33.6 MB. Free memory was 18.4 MB in the beginning and 18.3 MB in the end (delta: 41.9 kB). Peak memory consumption was 41.9 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 668.71 ms. Allocated memory was 34.1 MB in the beginning and 45.1 MB in the end (delta: 11.0 MB). Free memory was 9.1 MB in the beginning and 20.0 MB in the end (delta: -10.9 MB). Peak memory consumption was 8.7 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 98.65 ms. Allocated memory is still 45.1 MB. Free memory was 20.0 MB in the beginning and 17.2 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 14.3 GB. * RCFGBuilder took 652.61 ms. Allocated memory was 45.1 MB in the beginning and 47.2 MB in the end (delta: 2.1 MB). Free memory was 17.2 MB in the beginning and 14.5 MB in the end (delta: 2.7 MB). Peak memory consumption was 8.1 MB. Max. memory is 14.3 GB. * TraceAbstraction took 33394.49 ms. Allocated memory was 47.2 MB in the beginning and 131.6 MB in the end (delta: 84.4 MB). Free memory was 13.9 MB in the beginning and 4.6 MB in the end (delta: 9.3 MB). Peak memory consumption was 93.7 MB. Max. memory is 14.3 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 0.1.25-9a8b2e8 [2020-10-20 05:52:27,942 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 05:52:27,945 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 05:52:27,969 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 05:52:27,970 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 05:52:27,973 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 05:52:27,983 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 05:52:27,985 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 05:52:27,989 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 05:52:27,992 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 05:52:27,995 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 05:52:27,998 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 05:52:27,998 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 05:52:27,999 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 05:52:28,002 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 05:52:28,004 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 05:52:28,006 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 05:52:28,010 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 05:52:28,012 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 05:52:28,015 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 05:52:28,019 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 05:52:28,022 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 05:52:28,023 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 05:52:28,025 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 05:52:28,027 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 05:52:28,030 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 05:52:28,031 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 05:52:28,032 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 05:52:28,034 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 05:52:28,035 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 05:52:28,035 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 05:52:28,036 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 05:52:28,043 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 05:52:28,045 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 05:52:28,047 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 05:52:28,048 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 05:52:28,049 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 05:52:28,050 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 05:52:28,050 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 05:52:28,053 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 05:52:28,053 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 05:52:28,055 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2020-10-20 05:52:28,095 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 05:52:28,095 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 05:52:28,097 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 05:52:28,097 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 05:52:28,097 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 05:52:28,098 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 05:52:28,098 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 05:52:28,098 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-20 05:52:28,098 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 05:52:28,099 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 05:52:28,100 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 05:52:28,100 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-10-20 05:52:28,100 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-10-20 05:52:28,101 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-10-20 05:52:28,101 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 05:52:28,101 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-10-20 05:52:28,102 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-10-20 05:52:28,102 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-10-20 05:52:28,102 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 05:52:28,102 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 05:52:28,103 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 05:52:28,103 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 05:52:28,103 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 05:52:28,103 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 05:52:28,104 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 05:52:28,104 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 05:52:28,104 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 05:52:28,104 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-10-20 05:52:28,105 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-10-20 05:52:28,105 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 05:52:28,105 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-20 05:52:28,105 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 [2020-10-20 05:52:28,311 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 05:52:28,323 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 05:52:28,327 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 05:52:28,329 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 05:52:28,329 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 05:52:28,330 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/substring-alloca-2.i [2020-10-20 05:52:28,388 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f56afb53/52f6190178e34a7b9963621a72ecd430/FLAG97551ca94 [2020-10-20 05:52:28,927 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 05:52:28,928 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/substring-alloca-2.i [2020-10-20 05:52:28,942 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f56afb53/52f6190178e34a7b9963621a72ecd430/FLAG97551ca94 [2020-10-20 05:52:29,154 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f56afb53/52f6190178e34a7b9963621a72ecd430 [2020-10-20 05:52:29,158 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 05:52:29,164 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-20 05:52:29,166 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 05:52:29,167 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 05:52:29,170 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 05:52:29,171 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 05:52:29" (1/1) ... [2020-10-20 05:52:29,175 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66e800fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:52:29, skipping insertion in model container [2020-10-20 05:52:29,176 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 05:52:29" (1/1) ... [2020-10-20 05:52:29,184 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 05:52:29,230 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 05:52:29,674 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 05:52:29,693 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 05:52:29,759 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 05:52:29,838 INFO L208 MainTranslator]: Completed translation [2020-10-20 05:52:29,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:52:29 WrapperNode [2020-10-20 05:52:29,839 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 05:52:29,840 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 05:52:29,840 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 05:52:29,842 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 05:52:29,856 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:52:29" (1/1) ... [2020-10-20 05:52:29,856 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:52:29" (1/1) ... [2020-10-20 05:52:29,888 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:52:29" (1/1) ... [2020-10-20 05:52:29,889 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:52:29" (1/1) ... [2020-10-20 05:52:29,908 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:52:29" (1/1) ... [2020-10-20 05:52:29,915 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:52:29" (1/1) ... [2020-10-20 05:52:29,919 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:52:29" (1/1) ... [2020-10-20 05:52:29,927 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 05:52:29,928 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 05:52:29,928 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 05:52:29,928 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 05:52:29,929 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:52:29" (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 [2020-10-20 05:52:30,007 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-20 05:52:30,008 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 05:52:30,008 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2020-10-20 05:52:30,008 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-20 05:52:30,009 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-20 05:52:30,009 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-10-20 05:52:30,009 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-10-20 05:52:30,010 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-10-20 05:52:30,010 INFO L138 BoogieDeclarations]: Found implementation of procedure substring [2020-10-20 05:52:30,010 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-20 05:52:30,011 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-20 05:52:30,011 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-20 05:52:30,012 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-20 05:52:30,013 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-20 05:52:30,013 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-20 05:52:30,013 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-20 05:52:30,014 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-20 05:52:30,014 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-20 05:52:30,014 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-20 05:52:30,015 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-20 05:52:30,015 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-20 05:52:30,015 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-20 05:52:30,016 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-20 05:52:30,017 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-20 05:52:30,018 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-20 05:52:30,018 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-20 05:52:30,018 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-20 05:52:30,018 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-20 05:52:30,018 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-10-20 05:52:30,018 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-10-20 05:52:30,018 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-10-20 05:52:30,019 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-20 05:52:30,019 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-20 05:52:30,019 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-20 05:52:30,019 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-20 05:52:30,019 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-20 05:52:30,019 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-20 05:52:30,019 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-20 05:52:30,020 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-20 05:52:30,020 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-20 05:52:30,020 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-20 05:52:30,022 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-20 05:52:30,022 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-20 05:52:30,022 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-20 05:52:30,022 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-20 05:52:30,024 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-20 05:52:30,024 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-20 05:52:30,024 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-20 05:52:30,024 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-20 05:52:30,024 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-20 05:52:30,024 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-20 05:52:30,025 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-20 05:52:30,025 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-20 05:52:30,025 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-20 05:52:30,025 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-20 05:52:30,026 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-20 05:52:30,026 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-20 05:52:30,026 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-20 05:52:30,026 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-20 05:52:30,026 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-20 05:52:30,026 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-20 05:52:30,027 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-20 05:52:30,027 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-20 05:52:30,027 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-20 05:52:30,027 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-20 05:52:30,028 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-20 05:52:30,028 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-20 05:52:30,028 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-20 05:52:30,028 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-20 05:52:30,029 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-20 05:52:30,029 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-20 05:52:30,030 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-20 05:52:30,030 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-20 05:52:30,031 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-20 05:52:30,031 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-20 05:52:30,031 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-20 05:52:30,031 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-20 05:52:30,032 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-20 05:52:30,032 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-20 05:52:30,032 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-20 05:52:30,032 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-20 05:52:30,032 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-20 05:52:30,032 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-20 05:52:30,032 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-20 05:52:30,033 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-20 05:52:30,033 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-20 05:52:30,033 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-20 05:52:30,033 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-20 05:52:30,033 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-20 05:52:30,033 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-20 05:52:30,033 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-20 05:52:30,034 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-20 05:52:30,034 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-20 05:52:30,034 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-20 05:52:30,034 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-20 05:52:30,034 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-20 05:52:30,034 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-20 05:52:30,034 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-20 05:52:30,035 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-20 05:52:30,035 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-20 05:52:30,035 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-20 05:52:30,035 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-20 05:52:30,035 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-20 05:52:30,035 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-20 05:52:30,035 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-20 05:52:30,035 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-20 05:52:30,036 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-20 05:52:30,036 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-20 05:52:30,036 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-20 05:52:30,036 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-20 05:52:30,036 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-20 05:52:30,036 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-20 05:52:30,037 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-20 05:52:30,037 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-20 05:52:30,037 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-20 05:52:30,038 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-20 05:52:30,038 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-20 05:52:30,038 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-20 05:52:30,038 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-20 05:52:30,047 INFO L130 BoogieDeclarations]: Found specification of procedure substring [2020-10-20 05:52:30,048 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2020-10-20 05:52:30,048 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-20 05:52:30,048 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 05:52:30,048 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2020-10-20 05:52:30,049 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 05:52:30,049 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-20 05:52:30,049 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 05:52:30,049 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2020-10-20 05:52:30,917 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 05:52:30,917 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-20 05:52:30,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:52:30 BoogieIcfgContainer [2020-10-20 05:52:30,920 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 05:52:30,921 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 05:52:30,921 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 05:52:30,925 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 05:52:30,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 05:52:29" (1/3) ... [2020-10-20 05:52:30,927 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15cf339 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 05:52:30, skipping insertion in model container [2020-10-20 05:52:30,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:52:29" (2/3) ... [2020-10-20 05:52:30,927 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15cf339 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 05:52:30, skipping insertion in model container [2020-10-20 05:52:30,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:52:30" (3/3) ... [2020-10-20 05:52:30,930 INFO L111 eAbstractionObserver]: Analyzing ICFG substring-alloca-2.i [2020-10-20 05:52:30,943 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 05:52:30,954 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 19 error locations. [2020-10-20 05:52:30,969 INFO L253 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2020-10-20 05:52:30,991 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 05:52:30,991 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-20 05:52:30,992 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 05:52:30,992 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 05:52:30,992 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 05:52:30,993 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 05:52:30,993 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 05:52:30,993 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 05:52:31,010 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states. [2020-10-20 05:52:31,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 05:52:31,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:52:31,022 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:52:31,022 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]=== [2020-10-20 05:52:31,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:52:31,029 INFO L82 PathProgramCache]: Analyzing trace with hash 275578210, now seen corresponding path program 1 times [2020-10-20 05:52:31,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 05:52:31,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [480952107] [2020-10-20 05:52:31,044 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 [2020-10-20 05:52:31,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:52:31,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-20 05:52:31,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 05:52:31,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:52:31,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 05:52:31,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:52:31,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [480952107] [2020-10-20 05:52:31,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 05:52:31,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-10-20 05:52:31,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213154784] [2020-10-20 05:52:31,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 05:52:31,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 05:52:31,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 05:52:31,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-20 05:52:31,384 INFO L87 Difference]: Start difference. First operand 60 states. Second operand 6 states. [2020-10-20 05:52:31,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:52:31,528 INFO L93 Difference]: Finished difference Result 81 states and 91 transitions. [2020-10-20 05:52:31,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 05:52:31,531 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-10-20 05:52:31,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:52:31,547 INFO L225 Difference]: With dead ends: 81 [2020-10-20 05:52:31,547 INFO L226 Difference]: Without dead ends: 77 [2020-10-20 05:52:31,553 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 [2020-10-20 05:52:31,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-20 05:52:31,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 60. [2020-10-20 05:52:31,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-20 05:52:31,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2020-10-20 05:52:31,634 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 11 [2020-10-20 05:52:31,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:52:31,635 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2020-10-20 05:52:31,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 05:52:31,636 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2020-10-20 05:52:31,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 05:52:31,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:52:31,637 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:52:31,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-20 05:52:31,850 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]=== [2020-10-20 05:52:31,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:52:31,851 INFO L82 PathProgramCache]: Analyzing trace with hash 277425252, now seen corresponding path program 1 times [2020-10-20 05:52:31,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 05:52:31,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [252209164] [2020-10-20 05:52:31,853 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 [2020-10-20 05:52:31,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:52:31,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 05:52:31,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 05:52:32,108 INFO L350 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-10-20 05:52:32,109 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 [2020-10-20 05:52:32,111 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 05:52:32,121 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 05:52:32,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [252209164] [2020-10-20 05:52:32,124 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2020-10-20 05:52:32,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [527296874] [2020-10-20 05:52:32,125 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 [2020-10-20 05:52:32,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:52:32,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 05:52:32,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 05:52:32,399 INFO L350 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-10-20 05:52:32,400 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 [2020-10-20 05:52:32,402 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 05:52:32,410 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 05:52:32,412 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2020-10-20 05:52:32,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325497894] [2020-10-20 05:52:32,412 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 [2020-10-20 05:52:32,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:52:32,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 05:52:32,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 05:52:32,594 INFO L350 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-10-20 05:52:32,595 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 [2020-10-20 05:52:32,597 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 05:52:32,608 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 05:52:32,610 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2020-10-20 05:52:32,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-10-20 05:52:32,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-10-20 05:52:32,611 ERROR L205 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2020-10-20 05:52:32,611 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 05:52:33,225 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 [2020-10-20 05:52:33,239 WARN L238 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-10-20 05:52:33,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 05:52:33 BoogieIcfgContainer [2020-10-20 05:52:33,240 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 05:52:33,240 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 05:52:33,241 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 05:52:33,241 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 05:52:33,241 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:52:30" (3/4) ... [2020-10-20 05:52:33,245 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-20 05:52:33,245 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 05:52:33,247 INFO L168 Benchmark]: Toolchain (without parser) took 4087.92 ms. Allocated memory was 34.6 MB in the beginning and 59.8 MB in the end (delta: 25.2 MB). Free memory was 10.7 MB in the beginning and 33.5 MB in the end (delta: -22.8 MB). Peak memory consumption was 2.4 MB. Max. memory is 14.3 GB. [2020-10-20 05:52:33,248 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 33.0 MB. Free memory was 17.5 MB in the beginning and 17.5 MB in the end (delta: 40.4 kB). Peak memory consumption was 40.4 kB. Max. memory is 14.3 GB. [2020-10-20 05:52:33,249 INFO L168 Benchmark]: CACSL2BoogieTranslator took 673.36 ms. Allocated memory was 34.6 MB in the beginning and 44.6 MB in the end (delta: 10.0 MB). Free memory was 9.9 MB in the beginning and 26.0 MB in the end (delta: -16.1 MB). Peak memory consumption was 10.0 MB. Max. memory is 14.3 GB. [2020-10-20 05:52:33,250 INFO L168 Benchmark]: Boogie Preprocessor took 87.23 ms. Allocated memory is still 44.6 MB. Free memory was 26.0 MB in the beginning and 22.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 14.3 GB. [2020-10-20 05:52:33,251 INFO L168 Benchmark]: RCFGBuilder took 992.32 ms. Allocated memory was 44.6 MB in the beginning and 49.3 MB in the end (delta: 4.7 MB). Free memory was 22.8 MB in the beginning and 24.4 MB in the end (delta: -1.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 14.3 GB. [2020-10-20 05:52:33,252 INFO L168 Benchmark]: TraceAbstraction took 2319.03 ms. Allocated memory was 49.3 MB in the beginning and 59.8 MB in the end (delta: 10.5 MB). Free memory was 23.7 MB in the beginning and 34.1 MB in the end (delta: -10.4 MB). Peak memory consumption was 20.6 MB. Max. memory is 14.3 GB. [2020-10-20 05:52:33,252 INFO L168 Benchmark]: Witness Printer took 4.97 ms. Allocated memory is still 59.8 MB. Free memory was 34.1 MB in the beginning and 33.5 MB in the end (delta: 591.8 kB). Peak memory consumption was 591.8 kB. Max. memory is 14.3 GB. [2020-10-20 05:52:33,257 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 33.0 MB. Free memory was 17.5 MB in the beginning and 17.5 MB in the end (delta: 40.4 kB). Peak memory consumption was 40.4 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 673.36 ms. Allocated memory was 34.6 MB in the beginning and 44.6 MB in the end (delta: 10.0 MB). Free memory was 9.9 MB in the beginning and 26.0 MB in the end (delta: -16.1 MB). Peak memory consumption was 10.0 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 87.23 ms. Allocated memory is still 44.6 MB. Free memory was 26.0 MB in the beginning and 22.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 14.3 GB. * RCFGBuilder took 992.32 ms. Allocated memory was 44.6 MB in the beginning and 49.3 MB in the end (delta: 4.7 MB). Free memory was 22.8 MB in the beginning and 24.4 MB in the end (delta: -1.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 14.3 GB. * TraceAbstraction took 2319.03 ms. Allocated memory was 49.3 MB in the beginning and 59.8 MB in the end (delta: 10.5 MB). Free memory was 23.7 MB in the beginning and 34.1 MB in the end (delta: -10.4 MB). Peak memory consumption was 20.6 MB. Max. memory is 14.3 GB. * Witness Printer took 4.97 ms. Allocated memory is still 59.8 MB. Free memory was 34.1 MB in the beginning and 33.5 MB in the end (delta: 591.8 kB). Peak memory consumption was 591.8 kB. Max. memory is 14.3 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: 2.2s, 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...