./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../sv-benchmarks/c/list-properties/alternating_list-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version 906a4fb5 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/list-properties/alternating_list-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-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-memcleanup) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash da856cb29218eae000c82400da3ef1c667e9f55c .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-memcleanup) --- Real Ultimate output --- This is Ultimate 0.1.25-906a4fb [2020-10-19 18:26:18,579 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 18:26:18,582 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 18:26:18,605 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 18:26:18,606 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 18:26:18,607 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 18:26:18,609 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 18:26:18,611 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 18:26:18,613 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 18:26:18,614 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 18:26:18,615 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 18:26:18,616 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 18:26:18,617 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 18:26:18,618 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 18:26:18,619 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 18:26:18,620 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 18:26:18,621 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 18:26:18,622 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 18:26:18,624 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 18:26:18,626 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 18:26:18,628 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 18:26:18,629 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 18:26:18,630 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 18:26:18,631 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 18:26:18,634 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 18:26:18,634 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 18:26:18,634 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 18:26:18,635 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 18:26:18,636 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 18:26:18,637 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 18:26:18,637 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 18:26:18,638 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 18:26:18,639 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 18:26:18,640 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 18:26:18,641 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 18:26:18,641 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 18:26:18,642 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 18:26:18,642 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 18:26:18,643 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 18:26:18,644 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 18:26:18,644 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 18:26:18,645 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-32bit-Automizer_Default.epf [2020-10-19 18:26:18,669 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 18:26:18,669 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 18:26:18,670 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 18:26:18,671 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 18:26:18,671 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 18:26:18,671 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 18:26:18,672 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 18:26:18,672 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-19 18:26:18,672 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 18:26:18,673 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 18:26:18,673 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 18:26:18,673 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-10-19 18:26:18,673 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-10-19 18:26:18,674 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 18:26:18,674 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-10-19 18:26:18,674 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 18:26:18,674 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 18:26:18,675 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 18:26:18,675 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 18:26:18,675 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 18:26:18,676 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 18:26:18,676 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 18:26:18,676 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 18:26:18,677 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 18:26:18,677 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 18:26:18,678 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-19 18:26:18,678 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 18:26:18,678 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-memcleanup) ) 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 -> da856cb29218eae000c82400da3ef1c667e9f55c [2020-10-19 18:26:19,025 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 18:26:19,037 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 18:26:19,040 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 18:26:19,042 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 18:26:19,042 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 18:26:19,043 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-properties/alternating_list-2.i [2020-10-19 18:26:19,107 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5963bc46c/28f12d685c0a4770a7c3eeb171522fc4/FLAGa0b99e04c [2020-10-19 18:26:19,635 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 18:26:19,636 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/alternating_list-2.i [2020-10-19 18:26:19,649 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5963bc46c/28f12d685c0a4770a7c3eeb171522fc4/FLAGa0b99e04c [2020-10-19 18:26:19,938 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5963bc46c/28f12d685c0a4770a7c3eeb171522fc4 [2020-10-19 18:26:19,943 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 18:26:19,951 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-19 18:26:19,952 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 18:26:19,952 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 18:26:19,956 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 18:26:19,957 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:26:19" (1/1) ... [2020-10-19 18:26:19,960 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e5ac2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:26:19, skipping insertion in model container [2020-10-19 18:26:19,961 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:26:19" (1/1) ... [2020-10-19 18:26:19,970 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 18:26:20,025 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 18:26:20,469 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:26:20,481 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 18:26:20,528 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:26:20,591 INFO L208 MainTranslator]: Completed translation [2020-10-19 18:26:20,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:26:20 WrapperNode [2020-10-19 18:26:20,592 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 18:26:20,593 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 18:26:20,593 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 18:26:20,593 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 18:26:20,607 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:26:20" (1/1) ... [2020-10-19 18:26:20,608 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:26:20" (1/1) ... [2020-10-19 18:26:20,624 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:26:20" (1/1) ... [2020-10-19 18:26:20,625 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:26:20" (1/1) ... [2020-10-19 18:26:20,644 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:26:20" (1/1) ... [2020-10-19 18:26:20,650 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:26:20" (1/1) ... [2020-10-19 18:26:20,653 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:26:20" (1/1) ... [2020-10-19 18:26:20,660 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 18:26:20,661 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 18:26:20,661 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 18:26:20,662 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 18:26:20,663 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:26:20" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 18:26:20,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-19 18:26:20,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 18:26:20,725 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-19 18:26:20,725 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-19 18:26:20,726 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-19 18:26:20,726 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-10-19 18:26:20,726 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-10-19 18:26:20,726 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-10-19 18:26:20,727 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-19 18:26:20,727 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-19 18:26:20,727 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-19 18:26:20,727 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-19 18:26:20,728 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-19 18:26:20,728 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-19 18:26:20,728 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-19 18:26:20,728 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 18:26:20,729 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-19 18:26:20,731 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-19 18:26:20,732 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-19 18:26:20,732 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-19 18:26:20,732 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-19 18:26:20,732 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-19 18:26:20,733 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-19 18:26:20,733 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-19 18:26:20,733 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-19 18:26:20,734 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-19 18:26:20,735 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-19 18:26:20,736 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-19 18:26:20,736 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-19 18:26:20,736 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-19 18:26:20,736 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-19 18:26:20,737 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-19 18:26:20,737 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-19 18:26:20,737 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-19 18:26:20,738 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-19 18:26:20,738 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-10-19 18:26:20,738 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-10-19 18:26:20,738 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-10-19 18:26:20,738 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-19 18:26:20,738 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-19 18:26:20,738 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-19 18:26:20,739 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-19 18:26:20,739 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-19 18:26:20,739 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-19 18:26:20,739 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-19 18:26:20,740 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-19 18:26:20,741 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-19 18:26:20,741 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-19 18:26:20,741 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-19 18:26:20,741 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-19 18:26:20,742 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-19 18:26:20,742 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-19 18:26:20,742 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-19 18:26:20,742 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-19 18:26:20,742 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-19 18:26:20,742 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-19 18:26:20,743 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-19 18:26:20,743 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-19 18:26:20,743 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-19 18:26:20,743 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-19 18:26:20,743 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-19 18:26:20,743 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-19 18:26:20,744 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-19 18:26:20,744 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-19 18:26:20,744 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-19 18:26:20,744 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-19 18:26:20,744 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-19 18:26:20,744 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-19 18:26:20,744 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-19 18:26:20,745 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-19 18:26:20,745 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-19 18:26:20,745 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-19 18:26:20,745 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-19 18:26:20,745 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-19 18:26:20,746 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-19 18:26:20,746 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-19 18:26:20,746 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-19 18:26:20,746 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-19 18:26:20,746 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-19 18:26:20,747 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-19 18:26:20,747 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-19 18:26:20,747 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-19 18:26:20,747 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-19 18:26:20,747 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-19 18:26:20,747 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-19 18:26:20,748 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-19 18:26:20,748 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-19 18:26:20,748 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-19 18:26:20,748 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-19 18:26:20,748 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-19 18:26:20,748 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-19 18:26:20,748 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-19 18:26:20,748 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-19 18:26:20,749 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-19 18:26:20,749 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-19 18:26:20,749 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-19 18:26:20,749 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-19 18:26:20,749 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-19 18:26:20,749 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-19 18:26:20,749 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-19 18:26:20,749 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-19 18:26:20,749 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-19 18:26:20,750 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-19 18:26:20,750 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-19 18:26:20,750 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-19 18:26:20,750 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-19 18:26:20,750 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-19 18:26:20,750 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-19 18:26:20,750 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-19 18:26:20,750 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-19 18:26:20,751 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-19 18:26:20,751 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-19 18:26:20,751 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-19 18:26:20,751 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-19 18:26:20,751 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-19 18:26:20,751 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-19 18:26:20,752 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-19 18:26:20,752 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-19 18:26:20,752 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-19 18:26:20,752 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-19 18:26:20,752 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-19 18:26:20,752 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-19 18:26:20,753 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-19 18:26:20,753 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-19 18:26:20,753 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-19 18:26:20,753 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-19 18:26:20,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-19 18:26:20,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-19 18:26:20,754 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-19 18:26:20,754 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-19 18:26:20,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-19 18:26:20,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-19 18:26:20,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-19 18:26:20,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 18:26:21,184 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-19 18:26:21,441 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 18:26:21,442 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-19 18:26:21,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:26:21 BoogieIcfgContainer [2020-10-19 18:26:21,444 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 18:26:21,446 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 18:26:21,446 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 18:26:21,450 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 18:26:21,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 06:26:19" (1/3) ... [2020-10-19 18:26:21,452 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3af8f9d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 06:26:21, skipping insertion in model container [2020-10-19 18:26:21,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:26:20" (2/3) ... [2020-10-19 18:26:21,452 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3af8f9d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 06:26:21, skipping insertion in model container [2020-10-19 18:26:21,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:26:21" (3/3) ... [2020-10-19 18:26:21,454 INFO L111 eAbstractionObserver]: Analyzing ICFG alternating_list-2.i [2020-10-19 18:26:21,466 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 18:26:21,475 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 30 error locations. [2020-10-19 18:26:21,491 INFO L253 AbstractCegarLoop]: Starting to check reachability of 30 error locations. [2020-10-19 18:26:21,512 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 18:26:21,513 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-19 18:26:21,513 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 18:26:21,513 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 18:26:21,513 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 18:26:21,514 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 18:26:21,514 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 18:26:21,514 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 18:26:21,534 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states. [2020-10-19 18:26:21,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-19 18:26:21,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:26:21,544 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:26:21,545 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr25ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr23ASSERT_VIOLATIONMEMORY_FREE, mainErr27ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr22ASSERT_VIOLATIONMEMORY_FREE, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr28ENSURES_VIOLATIONMEMORY_LEAK, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr24ASSERT_VIOLATIONMEMORY_FREE, mainErr26ASSERT_VIOLATIONMEMORY_FREE]=== [2020-10-19 18:26:21,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:26:21,550 INFO L82 PathProgramCache]: Analyzing trace with hash -463735565, now seen corresponding path program 1 times [2020-10-19 18:26:21,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:26:21,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960804390] [2020-10-19 18:26:21,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:26:21,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:26:21,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:26:21,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:26:21,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:26:21,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960804390] [2020-10-19 18:26:21,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:26:21,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 18:26:21,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477059245] [2020-10-19 18:26:21,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 18:26:21,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:26:21,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 18:26:21,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 18:26:21,818 INFO L87 Difference]: Start difference. First operand 86 states. Second operand 3 states. [2020-10-19 18:26:22,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:26:22,052 INFO L93 Difference]: Finished difference Result 83 states and 90 transitions. [2020-10-19 18:26:22,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 18:26:22,054 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-10-19 18:26:22,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:26:22,065 INFO L225 Difference]: With dead ends: 83 [2020-10-19 18:26:22,065 INFO L226 Difference]: Without dead ends: 76 [2020-10-19 18:26:22,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 18:26:22,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-19 18:26:22,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-10-19 18:26:22,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-19 18:26:22,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2020-10-19 18:26:22,112 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 10 [2020-10-19 18:26:22,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:26:22,112 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2020-10-19 18:26:22,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 18:26:22,113 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2020-10-19 18:26:22,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-19 18:26:22,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:26:22,114 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:26:22,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-19 18:26:22,114 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr25ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr23ASSERT_VIOLATIONMEMORY_FREE, mainErr27ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr22ASSERT_VIOLATIONMEMORY_FREE, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr28ENSURES_VIOLATIONMEMORY_LEAK, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr24ASSERT_VIOLATIONMEMORY_FREE, mainErr26ASSERT_VIOLATIONMEMORY_FREE]=== [2020-10-19 18:26:22,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:26:22,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1490936265, now seen corresponding path program 1 times [2020-10-19 18:26:22,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:26:22,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785626854] [2020-10-19 18:26:22,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:26:22,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:26:22,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:26:22,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:26:22,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:26:22,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785626854] [2020-10-19 18:26:22,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:26:22,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:26:22,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730260830] [2020-10-19 18:26:22,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 18:26:22,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:26:22,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 18:26:22,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:26:22,251 INFO L87 Difference]: Start difference. First operand 76 states and 81 transitions. Second operand 5 states. [2020-10-19 18:26:22,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:26:22,509 INFO L93 Difference]: Finished difference Result 97 states and 105 transitions. [2020-10-19 18:26:22,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 18:26:22,510 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-10-19 18:26:22,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:26:22,512 INFO L225 Difference]: With dead ends: 97 [2020-10-19 18:26:22,512 INFO L226 Difference]: Without dead ends: 97 [2020-10-19 18:26:22,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-19 18:26:22,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-19 18:26:22,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 77. [2020-10-19 18:26:22,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-19 18:26:22,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2020-10-19 18:26:22,525 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 11 [2020-10-19 18:26:22,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:26:22,526 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2020-10-19 18:26:22,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 18:26:22,526 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2020-10-19 18:26:22,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-19 18:26:22,527 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:26:22,527 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:26:22,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-19 18:26:22,528 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr25ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr23ASSERT_VIOLATIONMEMORY_FREE, mainErr27ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr22ASSERT_VIOLATIONMEMORY_FREE, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr28ENSURES_VIOLATIONMEMORY_LEAK, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr24ASSERT_VIOLATIONMEMORY_FREE, mainErr26ASSERT_VIOLATIONMEMORY_FREE]=== [2020-10-19 18:26:22,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:26:22,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1490936264, now seen corresponding path program 1 times [2020-10-19 18:26:22,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:26:22,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118519527] [2020-10-19 18:26:22,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:26:22,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:26:22,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:26:22,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:26:22,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:26:22,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118519527] [2020-10-19 18:26:22,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:26:22,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:26:22,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641221756] [2020-10-19 18:26:22,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 18:26:22,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:26:22,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 18:26:22,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:26:22,640 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand 5 states. [2020-10-19 18:26:22,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:26:22,883 INFO L93 Difference]: Finished difference Result 104 states and 115 transitions. [2020-10-19 18:26:22,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 18:26:22,884 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-10-19 18:26:22,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:26:22,887 INFO L225 Difference]: With dead ends: 104 [2020-10-19 18:26:22,888 INFO L226 Difference]: Without dead ends: 104 [2020-10-19 18:26:22,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-19 18:26:22,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-19 18:26:22,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 93. [2020-10-19 18:26:22,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-19 18:26:22,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 105 transitions. [2020-10-19 18:26:22,900 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 105 transitions. Word has length 11 [2020-10-19 18:26:22,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:26:22,901 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 105 transitions. [2020-10-19 18:26:22,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 18:26:22,901 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 105 transitions. [2020-10-19 18:26:22,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-19 18:26:22,902 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:26:22,903 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:26:22,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-19 18:26:22,904 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr25ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr23ASSERT_VIOLATIONMEMORY_FREE, mainErr27ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr22ASSERT_VIOLATIONMEMORY_FREE, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr28ENSURES_VIOLATIONMEMORY_LEAK, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr24ASSERT_VIOLATIONMEMORY_FREE, mainErr26ASSERT_VIOLATIONMEMORY_FREE]=== [2020-10-19 18:26:22,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:26:22,904 INFO L82 PathProgramCache]: Analyzing trace with hash -574680799, now seen corresponding path program 1 times [2020-10-19 18:26:22,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:26:22,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165019873] [2020-10-19 18:26:22,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:26:22,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:26:22,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:26:22,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:26:23,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:26:23,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165019873] [2020-10-19 18:26:23,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:26:23,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:26:23,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961020035] [2020-10-19 18:26:23,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 18:26:23,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:26:23,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 18:26:23,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:26:23,027 INFO L87 Difference]: Start difference. First operand 93 states and 105 transitions. Second operand 5 states. [2020-10-19 18:26:23,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:26:23,245 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2020-10-19 18:26:23,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 18:26:23,249 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-19 18:26:23,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:26:23,250 INFO L225 Difference]: With dead ends: 100 [2020-10-19 18:26:23,251 INFO L226 Difference]: Without dead ends: 100 [2020-10-19 18:26:23,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-19 18:26:23,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-19 18:26:23,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 94. [2020-10-19 18:26:23,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-19 18:26:23,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 106 transitions. [2020-10-19 18:26:23,271 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 106 transitions. Word has length 19 [2020-10-19 18:26:23,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:26:23,272 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 106 transitions. [2020-10-19 18:26:23,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 18:26:23,273 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 106 transitions. [2020-10-19 18:26:23,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-19 18:26:23,275 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:26:23,276 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] [2020-10-19 18:26:23,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-19 18:26:23,277 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr25ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr23ASSERT_VIOLATIONMEMORY_FREE, mainErr27ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr22ASSERT_VIOLATIONMEMORY_FREE, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr28ENSURES_VIOLATIONMEMORY_LEAK, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr24ASSERT_VIOLATIONMEMORY_FREE, mainErr26ASSERT_VIOLATIONMEMORY_FREE]=== [2020-10-19 18:26:23,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:26:23,277 INFO L82 PathProgramCache]: Analyzing trace with hash 633071481, now seen corresponding path program 1 times [2020-10-19 18:26:23,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:26:23,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094235308] [2020-10-19 18:26:23,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:26:23,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:26:23,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:26:23,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:26:23,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:26:23,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094235308] [2020-10-19 18:26:23,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:26:23,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:26:23,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428161254] [2020-10-19 18:26:23,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:26:23,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:26:23,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:26:23,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:26:23,388 INFO L87 Difference]: Start difference. First operand 94 states and 106 transitions. Second operand 4 states. [2020-10-19 18:26:23,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:26:23,520 INFO L93 Difference]: Finished difference Result 143 states and 155 transitions. [2020-10-19 18:26:23,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:26:23,521 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-19 18:26:23,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:26:23,523 INFO L225 Difference]: With dead ends: 143 [2020-10-19 18:26:23,523 INFO L226 Difference]: Without dead ends: 143 [2020-10-19 18:26:23,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:26:23,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-19 18:26:23,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 103. [2020-10-19 18:26:23,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-19 18:26:23,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 119 transitions. [2020-10-19 18:26:23,533 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 119 transitions. Word has length 20 [2020-10-19 18:26:23,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:26:23,534 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 119 transitions. [2020-10-19 18:26:23,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:26:23,534 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 119 transitions. [2020-10-19 18:26:23,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-19 18:26:23,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:26:23,536 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] [2020-10-19 18:26:23,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-19 18:26:23,537 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr25ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr23ASSERT_VIOLATIONMEMORY_FREE, mainErr27ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr22ASSERT_VIOLATIONMEMORY_FREE, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr28ENSURES_VIOLATIONMEMORY_LEAK, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr24ASSERT_VIOLATIONMEMORY_FREE, mainErr26ASSERT_VIOLATIONMEMORY_FREE]=== [2020-10-19 18:26:23,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:26:23,537 INFO L82 PathProgramCache]: Analyzing trace with hash 337246851, now seen corresponding path program 1 times [2020-10-19 18:26:23,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:26:23,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042046957] [2020-10-19 18:26:23,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:26:23,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:26:23,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:26:23,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:26:23,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:26:23,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042046957] [2020-10-19 18:26:23,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:26:23,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-19 18:26:23,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972147289] [2020-10-19 18:26:23,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-19 18:26:23,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:26:23,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-19 18:26:23,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-19 18:26:23,643 INFO L87 Difference]: Start difference. First operand 103 states and 119 transitions. Second operand 7 states. [2020-10-19 18:26:23,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:26:23,953 INFO L93 Difference]: Finished difference Result 144 states and 159 transitions. [2020-10-19 18:26:23,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-19 18:26:23,954 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-10-19 18:26:23,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:26:23,956 INFO L225 Difference]: With dead ends: 144 [2020-10-19 18:26:23,956 INFO L226 Difference]: Without dead ends: 144 [2020-10-19 18:26:23,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-19 18:26:23,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-19 18:26:23,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 106. [2020-10-19 18:26:23,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-19 18:26:23,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 122 transitions. [2020-10-19 18:26:23,966 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 122 transitions. Word has length 20 [2020-10-19 18:26:23,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:26:23,967 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 122 transitions. [2020-10-19 18:26:23,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-19 18:26:23,967 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 122 transitions. [2020-10-19 18:26:23,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-19 18:26:23,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:26:23,969 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] [2020-10-19 18:26:23,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-19 18:26:23,969 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr25ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr23ASSERT_VIOLATIONMEMORY_FREE, mainErr27ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr22ASSERT_VIOLATIONMEMORY_FREE, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr28ENSURES_VIOLATIONMEMORY_LEAK, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr24ASSERT_VIOLATIONMEMORY_FREE, mainErr26ASSERT_VIOLATIONMEMORY_FREE]=== [2020-10-19 18:26:23,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:26:23,992 INFO L82 PathProgramCache]: Analyzing trace with hash -635189694, now seen corresponding path program 1 times [2020-10-19 18:26:23,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:26:23,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246714062] [2020-10-19 18:26:23,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:26:24,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:26:24,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:26:24,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:26:24,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:26:24,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246714062] [2020-10-19 18:26:24,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:26:24,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-19 18:26:24,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958661082] [2020-10-19 18:26:24,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-19 18:26:24,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:26:24,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 18:26:24,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-19 18:26:24,116 INFO L87 Difference]: Start difference. First operand 106 states and 122 transitions. Second operand 6 states. [2020-10-19 18:26:24,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:26:24,314 INFO L93 Difference]: Finished difference Result 115 states and 130 transitions. [2020-10-19 18:26:24,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-19 18:26:24,315 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-19 18:26:24,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:26:24,316 INFO L225 Difference]: With dead ends: 115 [2020-10-19 18:26:24,316 INFO L226 Difference]: Without dead ends: 115 [2020-10-19 18:26:24,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-19 18:26:24,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-19 18:26:24,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 108. [2020-10-19 18:26:24,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-19 18:26:24,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 124 transitions. [2020-10-19 18:26:24,324 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 124 transitions. Word has length 20 [2020-10-19 18:26:24,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:26:24,324 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 124 transitions. [2020-10-19 18:26:24,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-19 18:26:24,325 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 124 transitions. [2020-10-19 18:26:24,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-19 18:26:24,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:26:24,326 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] [2020-10-19 18:26:24,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-19 18:26:24,326 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr25ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr23ASSERT_VIOLATIONMEMORY_FREE, mainErr27ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr22ASSERT_VIOLATIONMEMORY_FREE, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr28ENSURES_VIOLATIONMEMORY_LEAK, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr24ASSERT_VIOLATIONMEMORY_FREE, mainErr26ASSERT_VIOLATIONMEMORY_FREE]=== [2020-10-19 18:26:24,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:26:24,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1782539078, now seen corresponding path program 1 times [2020-10-19 18:26:24,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:26:24,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021074055] [2020-10-19 18:26:24,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:26:24,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:26:24,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:26:24,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:26:24,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:26:24,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021074055] [2020-10-19 18:26:24,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:26:24,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-19 18:26:24,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816117541] [2020-10-19 18:26:24,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-19 18:26:24,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:26:24,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 18:26:24,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-19 18:26:24,429 INFO L87 Difference]: Start difference. First operand 108 states and 124 transitions. Second operand 6 states. [2020-10-19 18:26:24,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:26:24,567 INFO L93 Difference]: Finished difference Result 122 states and 138 transitions. [2020-10-19 18:26:24,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 18:26:24,568 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-19 18:26:24,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:26:24,569 INFO L225 Difference]: With dead ends: 122 [2020-10-19 18:26:24,569 INFO L226 Difference]: Without dead ends: 118 [2020-10-19 18:26:24,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-19 18:26:24,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-19 18:26:24,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 111. [2020-10-19 18:26:24,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-19 18:26:24,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 127 transitions. [2020-10-19 18:26:24,575 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 127 transitions. Word has length 21 [2020-10-19 18:26:24,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:26:24,576 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 127 transitions. [2020-10-19 18:26:24,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-19 18:26:24,576 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 127 transitions. [2020-10-19 18:26:24,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-19 18:26:24,577 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:26:24,577 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:26:24,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-19 18:26:24,578 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr25ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr23ASSERT_VIOLATIONMEMORY_FREE, mainErr27ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr22ASSERT_VIOLATIONMEMORY_FREE, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr28ENSURES_VIOLATIONMEMORY_LEAK, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr24ASSERT_VIOLATIONMEMORY_FREE, mainErr26ASSERT_VIOLATIONMEMORY_FREE]=== [2020-10-19 18:26:24,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:26:24,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1783956134, now seen corresponding path program 1 times [2020-10-19 18:26:24,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:26:24,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457397313] [2020-10-19 18:26:24,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:26:24,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:26:24,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:26:24,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:26:24,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:26:24,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457397313] [2020-10-19 18:26:24,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:26:24,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-19 18:26:24,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586105282] [2020-10-19 18:26:24,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-19 18:26:24,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:26:24,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 18:26:24,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-19 18:26:24,642 INFO L87 Difference]: Start difference. First operand 111 states and 127 transitions. Second operand 6 states. [2020-10-19 18:26:24,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:26:24,847 INFO L93 Difference]: Finished difference Result 119 states and 134 transitions. [2020-10-19 18:26:24,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-19 18:26:24,848 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-19 18:26:24,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:26:24,850 INFO L225 Difference]: With dead ends: 119 [2020-10-19 18:26:24,850 INFO L226 Difference]: Without dead ends: 119 [2020-10-19 18:26:24,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-19 18:26:24,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-19 18:26:24,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 112. [2020-10-19 18:26:24,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-19 18:26:24,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 128 transitions. [2020-10-19 18:26:24,855 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 128 transitions. Word has length 21 [2020-10-19 18:26:24,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:26:24,855 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 128 transitions. [2020-10-19 18:26:24,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-19 18:26:24,856 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 128 transitions. [2020-10-19 18:26:24,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-19 18:26:24,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:26:24,857 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:26:24,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-19 18:26:24,857 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr25ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr23ASSERT_VIOLATIONMEMORY_FREE, mainErr27ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr22ASSERT_VIOLATIONMEMORY_FREE, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr28ENSURES_VIOLATIONMEMORY_LEAK, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr24ASSERT_VIOLATIONMEMORY_FREE, mainErr26ASSERT_VIOLATIONMEMORY_FREE]=== [2020-10-19 18:26:24,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:26:24,857 INFO L82 PathProgramCache]: Analyzing trace with hash 119047172, now seen corresponding path program 1 times [2020-10-19 18:26:24,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:26:24,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691029392] [2020-10-19 18:26:24,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:26:24,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:26:24,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:26:24,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:26:24,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:26:24,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691029392] [2020-10-19 18:26:24,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:26:24,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-19 18:26:24,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748988838] [2020-10-19 18:26:24,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-19 18:26:24,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:26:24,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-19 18:26:24,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-19 18:26:24,935 INFO L87 Difference]: Start difference. First operand 112 states and 128 transitions. Second operand 7 states. [2020-10-19 18:26:25,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:26:25,232 INFO L93 Difference]: Finished difference Result 116 states and 132 transitions. [2020-10-19 18:26:25,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-19 18:26:25,233 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-19 18:26:25,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:26:25,234 INFO L225 Difference]: With dead ends: 116 [2020-10-19 18:26:25,234 INFO L226 Difference]: Without dead ends: 116 [2020-10-19 18:26:25,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-19 18:26:25,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-19 18:26:25,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 109. [2020-10-19 18:26:25,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-19 18:26:25,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 125 transitions. [2020-10-19 18:26:25,239 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 125 transitions. Word has length 21 [2020-10-19 18:26:25,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:26:25,239 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 125 transitions. [2020-10-19 18:26:25,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-19 18:26:25,240 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 125 transitions. [2020-10-19 18:26:25,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-19 18:26:25,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:26:25,241 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:26:25,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-19 18:26:25,241 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr25ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr23ASSERT_VIOLATIONMEMORY_FREE, mainErr27ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr22ASSERT_VIOLATIONMEMORY_FREE, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr28ENSURES_VIOLATIONMEMORY_LEAK, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr24ASSERT_VIOLATIONMEMORY_FREE, mainErr26ASSERT_VIOLATIONMEMORY_FREE]=== [2020-10-19 18:26:25,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:26:25,242 INFO L82 PathProgramCache]: Analyzing trace with hash 119047173, now seen corresponding path program 1 times [2020-10-19 18:26:25,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:26:25,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091341676] [2020-10-19 18:26:25,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:26:25,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:26:25,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:26:25,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:26:25,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:26:25,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091341676] [2020-10-19 18:26:25,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:26:25,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-19 18:26:25,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501273260] [2020-10-19 18:26:25,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-19 18:26:25,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:26:25,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-19 18:26:25,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-19 18:26:25,332 INFO L87 Difference]: Start difference. First operand 109 states and 125 transitions. Second operand 7 states. [2020-10-19 18:26:25,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:26:25,678 INFO L93 Difference]: Finished difference Result 129 states and 143 transitions. [2020-10-19 18:26:25,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-19 18:26:25,678 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-19 18:26:25,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:26:25,679 INFO L225 Difference]: With dead ends: 129 [2020-10-19 18:26:25,679 INFO L226 Difference]: Without dead ends: 129 [2020-10-19 18:26:25,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-19 18:26:25,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-19 18:26:25,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 97. [2020-10-19 18:26:25,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-19 18:26:25,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 111 transitions. [2020-10-19 18:26:25,685 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 111 transitions. Word has length 21 [2020-10-19 18:26:25,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:26:25,685 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 111 transitions. [2020-10-19 18:26:25,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-19 18:26:25,686 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 111 transitions. [2020-10-19 18:26:25,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-19 18:26:25,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:26:25,687 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] [2020-10-19 18:26:25,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-19 18:26:25,687 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr25ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr23ASSERT_VIOLATIONMEMORY_FREE, mainErr27ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr22ASSERT_VIOLATIONMEMORY_FREE, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr28ENSURES_VIOLATIONMEMORY_LEAK, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr24ASSERT_VIOLATIONMEMORY_FREE, mainErr26ASSERT_VIOLATIONMEMORY_FREE]=== [2020-10-19 18:26:25,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:26:25,688 INFO L82 PathProgramCache]: Analyzing trace with hash -531934524, now seen corresponding path program 1 times [2020-10-19 18:26:25,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:26:25,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528062195] [2020-10-19 18:26:25,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:26:25,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:26:25,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:26:25,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:26:25,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:26:25,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528062195] [2020-10-19 18:26:25,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:26:25,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:26:25,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061762465] [2020-10-19 18:26:25,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 18:26:25,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:26:25,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 18:26:25,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:26:25,743 INFO L87 Difference]: Start difference. First operand 97 states and 111 transitions. Second operand 5 states. [2020-10-19 18:26:25,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:26:25,875 INFO L93 Difference]: Finished difference Result 96 states and 110 transitions. [2020-10-19 18:26:25,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 18:26:25,876 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-19 18:26:25,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:26:25,877 INFO L225 Difference]: With dead ends: 96 [2020-10-19 18:26:25,877 INFO L226 Difference]: Without dead ends: 96 [2020-10-19 18:26:25,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-19 18:26:25,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-19 18:26:25,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-10-19 18:26:25,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-19 18:26:25,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 110 transitions. [2020-10-19 18:26:25,882 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 110 transitions. Word has length 22 [2020-10-19 18:26:25,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:26:25,883 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 110 transitions. [2020-10-19 18:26:25,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 18:26:25,883 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 110 transitions. [2020-10-19 18:26:25,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-19 18:26:25,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:26:25,884 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:26:25,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-19 18:26:25,885 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr25ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr23ASSERT_VIOLATIONMEMORY_FREE, mainErr27ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr22ASSERT_VIOLATIONMEMORY_FREE, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr28ENSURES_VIOLATIONMEMORY_LEAK, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr24ASSERT_VIOLATIONMEMORY_FREE, mainErr26ASSERT_VIOLATIONMEMORY_FREE]=== [2020-10-19 18:26:25,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:26:25,885 INFO L82 PathProgramCache]: Analyzing trace with hash 689899095, now seen corresponding path program 1 times [2020-10-19 18:26:25,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:26:25,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002717414] [2020-10-19 18:26:25,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:26:25,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:26:25,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:26:25,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:26:25,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:26:25,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002717414] [2020-10-19 18:26:25,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:26:25,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-19 18:26:25,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115885008] [2020-10-19 18:26:25,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-19 18:26:25,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:26:25,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-19 18:26:25,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-19 18:26:25,977 INFO L87 Difference]: Start difference. First operand 96 states and 110 transitions. Second operand 7 states. [2020-10-19 18:26:26,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:26:26,194 INFO L93 Difference]: Finished difference Result 110 states and 122 transitions. [2020-10-19 18:26:26,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-19 18:26:26,195 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-10-19 18:26:26,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:26:26,196 INFO L225 Difference]: With dead ends: 110 [2020-10-19 18:26:26,196 INFO L226 Difference]: Without dead ends: 103 [2020-10-19 18:26:26,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-19 18:26:26,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-19 18:26:26,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 89. [2020-10-19 18:26:26,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-19 18:26:26,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 102 transitions. [2020-10-19 18:26:26,200 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 102 transitions. Word has length 23 [2020-10-19 18:26:26,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:26:26,200 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 102 transitions. [2020-10-19 18:26:26,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-19 18:26:26,201 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 102 transitions. [2020-10-19 18:26:26,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-19 18:26:26,202 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:26:26,202 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:26:26,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-19 18:26:26,202 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr25ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr23ASSERT_VIOLATIONMEMORY_FREE, mainErr27ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr22ASSERT_VIOLATIONMEMORY_FREE, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr28ENSURES_VIOLATIONMEMORY_LEAK, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr24ASSERT_VIOLATIONMEMORY_FREE, mainErr26ASSERT_VIOLATIONMEMORY_FREE]=== [2020-10-19 18:26:26,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:26:26,203 INFO L82 PathProgramCache]: Analyzing trace with hash -514536618, now seen corresponding path program 1 times [2020-10-19 18:26:26,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:26:26,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651753847] [2020-10-19 18:26:26,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:26:26,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:26:26,223 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:26:26,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:26:26,238 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:26:26,272 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:26:26,272 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-19 18:26:26,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-19 18:26:26,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.10 06:26:26 BoogieIcfgContainer [2020-10-19 18:26:26,320 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-19 18:26:26,320 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 18:26:26,320 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 18:26:26,321 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 18:26:26,321 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:26:21" (3/4) ... [2020-10-19 18:26:26,324 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-19 18:26:26,381 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-19 18:26:26,382 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 18:26:26,384 INFO L168 Benchmark]: Toolchain (without parser) took 6439.14 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 201.3 MB). Free memory was 954.6 MB in the beginning and 848.0 MB in the end (delta: 106.6 MB). Peak memory consumption was 307.9 MB. Max. memory is 11.5 GB. [2020-10-19 18:26:26,385 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:26:26,386 INFO L168 Benchmark]: CACSL2BoogieTranslator took 640.48 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 116.9 MB). Free memory was 954.6 MB in the beginning and 1.1 GB in the end (delta: -142.7 MB). Peak memory consumption was 26.0 MB. Max. memory is 11.5 GB. [2020-10-19 18:26:26,386 INFO L168 Benchmark]: Boogie Preprocessor took 67.94 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. [2020-10-19 18:26:26,387 INFO L168 Benchmark]: RCFGBuilder took 783.60 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 58.8 MB). Peak memory consumption was 58.8 MB. Max. memory is 11.5 GB. [2020-10-19 18:26:26,388 INFO L168 Benchmark]: TraceAbstraction took 4873.76 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 84.4 MB). Free memory was 1.0 GB in the beginning and 848.0 MB in the end (delta: 183.6 MB). Peak memory consumption was 268.0 MB. Max. memory is 11.5 GB. [2020-10-19 18:26:26,388 INFO L168 Benchmark]: Witness Printer took 61.88 ms. Allocated memory is still 1.2 GB. Free memory is still 848.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:26:26,391 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 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 640.48 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 116.9 MB). Free memory was 954.6 MB in the beginning and 1.1 GB in the end (delta: -142.7 MB). Peak memory consumption was 26.0 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 67.94 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. * RCFGBuilder took 783.60 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 58.8 MB). Peak memory consumption was 58.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4873.76 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 84.4 MB). Free memory was 1.0 GB in the beginning and 848.0 MB in the end (delta: 183.6 MB). Peak memory consumption was 268.0 MB. Max. memory is 11.5 GB. * Witness Printer took 61.88 ms. Allocated memory is still 1.2 GB. Free memory is still 848.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: [L532] int flag = 1; [L533] List a = (List) malloc(sizeof(struct node)); VAL [a={1:0}, flag=1, malloc(sizeof(struct node))={1:0}] [L534] COND FALSE !(a == 0) VAL [a={1:0}, flag=1, malloc(sizeof(struct node))={1:0}] [L535] List t; [L536] List p = a; VAL [a={1:0}, flag=1, malloc(sizeof(struct node))={1:0}, p={1:0}] [L537] COND TRUE __VERIFIER_nondet_int() [L538] COND TRUE \read(flag) VAL [a={1:0}, flag=1, malloc(sizeof(struct node))={1:0}, p={1:0}] [L539] p->h = 2 VAL [a={1:0}, flag=1, malloc(sizeof(struct node))={1:0}, p={1:0}] [L540] flag = 0 VAL [a={1:0}, flag=0, malloc(sizeof(struct node))={1:0}, p={1:0}] [L545] t = (List) malloc(sizeof(struct node)) VAL [a={1:0}, flag=0, malloc(sizeof(struct node))={1:0}, malloc(sizeof(struct node))={-1:0}, p={1:0}, t={-1:0}] [L546] COND FALSE !(t == 0) VAL [a={1:0}, flag=0, malloc(sizeof(struct node))={1:0}, malloc(sizeof(struct node))={-1:0}, p={1:0}, t={-1:0}] [L547] p->n = t VAL [a={1:0}, flag=0, malloc(sizeof(struct node))={1:0}, malloc(sizeof(struct node))={-1:0}, p={1:0}, t={-1:0}] [L548] EXPR p->n VAL [a={1:0}, flag=0, malloc(sizeof(struct node))={1:0}, malloc(sizeof(struct node))={-1:0}, p={1:0}, p->n={-1:0}, t={-1:0}] [L548] p = p->n [L537] COND FALSE !(__VERIFIER_nondet_int()) [L550] p->h = 3 VAL [a={1:0}, flag=0, malloc(sizeof(struct node))={1:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, t={-1:0}] [L551] p = a [L552] flag = 1 VAL [a={1:0}, flag=1, malloc(sizeof(struct node))={1:0}, malloc(sizeof(struct node))={-1:0}, p={1:0}, t={-1:0}] [L553] EXPR p->h VAL [a={1:0}, flag=1, malloc(sizeof(struct node))={1:0}, malloc(sizeof(struct node))={-1:0}, p={1:0}, p->h=2, t={-1:0}] [L553] COND TRUE p->h != 3 [L554] COND TRUE \read(flag) [L555] flag = 0 VAL [a={1:0}, flag=0, malloc(sizeof(struct node))={1:0}, malloc(sizeof(struct node))={-1:0}, p={1:0}, t={-1:0}] [L556] EXPR p->h VAL [a={1:0}, flag=0, malloc(sizeof(struct node))={1:0}, malloc(sizeof(struct node))={-1:0}, p={1:0}, p->h=2, t={-1:0}] [L556] COND TRUE p->h != 1 [L573] CALL reach_error() [L12] COND FALSE !(0) [L12] __assert_fail ("0", "alternating_list-2.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 102 locations, 30 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.7s, OverallIterations: 14, TraceHistogramMax: 2, AutomataDifference: 3.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 754 SDtfs, 1007 SDslu, 1083 SDs, 0 SdLazy, 2114 SolverSat, 147 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 106 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=112occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 13 MinimizatonAttempts, 189 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 270 NumberOfCodeBlocks, 270 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 227 ConstructedInterpolants, 0 QuantifiedInterpolants, 18775 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 13 InterpolantComputations, 13 PerfectInterpolantSequences, 5/5 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 proved your program to be incorrect! Received shutdown request...