./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/openbsd_cmemrchr-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 906a4fb5 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/openbsd_cmemrchr-alloca-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b2f3c0ded3a6ea37e981661d4b4066d384875e4d ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-906a4fb [2020-10-19 17:57:15,526 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 17:57:15,528 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 17:57:15,554 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 17:57:15,554 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 17:57:15,556 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 17:57:15,557 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 17:57:15,559 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 17:57:15,561 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 17:57:15,562 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 17:57:15,564 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 17:57:15,565 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 17:57:15,566 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 17:57:15,567 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 17:57:15,569 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 17:57:15,572 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 17:57:15,575 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 17:57:15,580 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 17:57:15,584 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 17:57:15,587 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 17:57:15,589 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 17:57:15,594 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 17:57:15,596 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 17:57:15,599 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 17:57:15,606 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 17:57:15,608 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 17:57:15,609 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 17:57:15,610 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 17:57:15,612 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 17:57:15,614 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 17:57:15,614 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 17:57:15,615 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 17:57:15,616 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 17:57:15,623 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 17:57:15,625 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 17:57:15,629 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 17:57:15,630 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 17:57:15,630 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 17:57:15,631 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 17:57:15,632 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 17:57:15,632 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 17:57:15,634 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-10-19 17:57:15,678 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 17:57:15,679 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 17:57:15,681 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 17:57:15,682 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 17:57:15,682 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 17:57:15,682 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 17:57:15,683 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 17:57:15,683 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-19 17:57:15,683 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 17:57:15,684 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 17:57:15,685 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 17:57:15,685 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-10-19 17:57:15,686 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-10-19 17:57:15,686 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-10-19 17:57:15,687 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 17:57:15,687 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-10-19 17:57:15,687 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 17:57:15,687 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 17:57:15,688 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 17:57:15,690 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 17:57:15,690 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 17:57:15,692 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 17:57:15,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 17:57:15,694 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 17:57:15,694 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 17:57:15,694 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 17:57:15,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-19 17:57:15,695 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 17:57:15,695 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b2f3c0ded3a6ea37e981661d4b4066d384875e4d [2020-10-19 17:57:16,026 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 17:57:16,040 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 17:57:16,043 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 17:57:16,044 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 17:57:16,045 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 17:57:16,046 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cmemrchr-alloca-2.i [2020-10-19 17:57:16,111 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35b7238e9/5370a76ed2bd40d38a18421324eac571/FLAG15f1b5086 [2020-10-19 17:57:16,618 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 17:57:16,619 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cmemrchr-alloca-2.i [2020-10-19 17:57:16,633 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35b7238e9/5370a76ed2bd40d38a18421324eac571/FLAG15f1b5086 [2020-10-19 17:57:16,985 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35b7238e9/5370a76ed2bd40d38a18421324eac571 [2020-10-19 17:57:16,989 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 17:57:16,998 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-19 17:57:16,999 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 17:57:16,999 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 17:57:17,004 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 17:57:17,005 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 05:57:16" (1/1) ... [2020-10-19 17:57:17,010 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6709d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:57:17, skipping insertion in model container [2020-10-19 17:57:17,010 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 05:57:16" (1/1) ... [2020-10-19 17:57:17,019 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 17:57:17,079 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 17:57:17,534 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 17:57:17,546 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 17:57:17,592 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 17:57:17,649 INFO L208 MainTranslator]: Completed translation [2020-10-19 17:57:17,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:57:17 WrapperNode [2020-10-19 17:57:17,650 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 17:57:17,651 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 17:57:17,651 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 17:57:17,651 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 17:57:17,665 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:57:17" (1/1) ... [2020-10-19 17:57:17,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:57:17" (1/1) ... [2020-10-19 17:57:17,681 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:57:17" (1/1) ... [2020-10-19 17:57:17,682 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:57:17" (1/1) ... [2020-10-19 17:57:17,697 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:57:17" (1/1) ... [2020-10-19 17:57:17,702 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:57:17" (1/1) ... [2020-10-19 17:57:17,708 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:57:17" (1/1) ... [2020-10-19 17:57:17,720 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 17:57:17,721 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 17:57:17,721 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 17:57:17,721 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 17:57:17,722 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:57:17" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 17:57:17,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-19 17:57:17,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 17:57:17,794 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-19 17:57:17,794 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-19 17:57:17,795 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-10-19 17:57:17,795 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-10-19 17:57:17,795 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-10-19 17:57:17,795 INFO L138 BoogieDeclarations]: Found implementation of procedure cmemrchr [2020-10-19 17:57:17,795 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-19 17:57:17,796 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-19 17:57:17,796 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-19 17:57:17,796 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-19 17:57:17,796 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-19 17:57:17,797 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-19 17:57:17,797 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-19 17:57:17,797 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-19 17:57:17,797 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-19 17:57:17,798 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-19 17:57:17,798 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-19 17:57:17,798 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-19 17:57:17,798 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-19 17:57:17,799 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-19 17:57:17,799 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-19 17:57:17,799 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-19 17:57:17,799 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-19 17:57:17,799 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-19 17:57:17,800 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-19 17:57:17,800 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-10-19 17:57:17,800 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-10-19 17:57:17,800 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-10-19 17:57:17,800 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-19 17:57:17,801 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-19 17:57:17,801 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-19 17:57:17,801 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-19 17:57:17,801 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-19 17:57:17,801 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-19 17:57:17,802 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-19 17:57:17,802 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-19 17:57:17,802 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-19 17:57:17,802 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-19 17:57:17,803 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-19 17:57:17,803 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-19 17:57:17,803 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-19 17:57:17,803 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-19 17:57:17,803 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-19 17:57:17,804 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-19 17:57:17,804 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-19 17:57:17,804 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-19 17:57:17,804 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-19 17:57:17,805 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-19 17:57:17,805 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-19 17:57:17,805 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-19 17:57:17,805 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-19 17:57:17,806 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-19 17:57:17,806 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-19 17:57:17,806 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-19 17:57:17,806 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-19 17:57:17,806 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-19 17:57:17,807 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-19 17:57:17,807 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-19 17:57:17,807 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-19 17:57:17,807 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-19 17:57:17,807 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-19 17:57:17,808 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-19 17:57:17,808 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-19 17:57:17,808 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-19 17:57:17,808 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-19 17:57:17,808 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-19 17:57:17,809 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-19 17:57:17,809 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-19 17:57:17,809 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-19 17:57:17,809 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-19 17:57:17,810 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-19 17:57:17,810 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-19 17:57:17,810 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-19 17:57:17,810 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-19 17:57:17,810 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-19 17:57:17,811 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-19 17:57:17,811 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-19 17:57:17,811 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-19 17:57:17,811 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-19 17:57:17,812 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-19 17:57:17,812 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-19 17:57:17,812 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-19 17:57:17,812 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-19 17:57:17,812 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-19 17:57:17,813 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-19 17:57:17,813 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-19 17:57:17,813 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-19 17:57:17,813 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-19 17:57:17,813 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-19 17:57:17,814 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-19 17:57:17,814 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-19 17:57:17,814 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-19 17:57:17,814 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-19 17:57:17,814 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-19 17:57:17,815 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-19 17:57:17,815 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-19 17:57:17,815 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-19 17:57:17,815 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-19 17:57:17,815 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-19 17:57:17,816 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-19 17:57:17,816 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-19 17:57:17,816 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-19 17:57:17,816 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-19 17:57:17,816 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-19 17:57:17,817 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-19 17:57:17,817 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-19 17:57:17,817 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-19 17:57:17,817 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-19 17:57:17,817 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-19 17:57:17,818 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-19 17:57:17,818 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-19 17:57:17,818 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-19 17:57:17,818 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-19 17:57:17,818 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-19 17:57:17,819 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-19 17:57:17,819 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-19 17:57:17,819 INFO L130 BoogieDeclarations]: Found specification of procedure cmemrchr [2020-10-19 17:57:17,819 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-19 17:57:17,819 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-19 17:57:17,820 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 17:57:17,820 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-19 17:57:17,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-19 17:57:17,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-19 17:57:17,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 17:57:18,345 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 17:57:18,346 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-19 17:57:18,348 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 05:57:18 BoogieIcfgContainer [2020-10-19 17:57:18,348 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 17:57:18,349 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 17:57:18,350 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 17:57:18,353 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 17:57:18,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 05:57:16" (1/3) ... [2020-10-19 17:57:18,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d66e33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 05:57:18, skipping insertion in model container [2020-10-19 17:57:18,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:57:17" (2/3) ... [2020-10-19 17:57:18,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d66e33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 05:57:18, skipping insertion in model container [2020-10-19 17:57:18,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 05:57:18" (3/3) ... [2020-10-19 17:57:18,358 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cmemrchr-alloca-2.i [2020-10-19 17:57:18,370 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 17:57:18,377 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-10-19 17:57:18,389 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-10-19 17:57:18,410 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 17:57:18,410 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-19 17:57:18,411 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 17:57:18,411 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 17:57:18,412 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 17:57:18,412 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 17:57:18,412 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 17:57:18,412 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 17:57:18,428 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-10-19 17:57:18,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-19 17:57:18,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:57:18,436 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:57:18,437 INFO L429 AbstractCegarLoop]: === Iteration 1 === [cmemrchrErr1REQUIRES_VIOLATION, cmemrchrErr0REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 17:57:18,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:57:18,442 INFO L82 PathProgramCache]: Analyzing trace with hash -840380262, now seen corresponding path program 1 times [2020-10-19 17:57:18,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:57:18,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701431343] [2020-10-19 17:57:18,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:57:18,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:57:18,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:57:18,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:57:18,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:57:18,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701431343] [2020-10-19 17:57:18,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 17:57:18,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 17:57:18,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99958965] [2020-10-19 17:57:18,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 17:57:18,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:57:18,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 17:57:18,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 17:57:18,693 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 4 states. [2020-10-19 17:57:18,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:57:18,828 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-10-19 17:57:18,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 17:57:18,831 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-10-19 17:57:18,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:57:18,842 INFO L225 Difference]: With dead ends: 33 [2020-10-19 17:57:18,843 INFO L226 Difference]: Without dead ends: 30 [2020-10-19 17:57:18,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 17:57:18,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-19 17:57:18,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-19 17:57:18,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-19 17:57:18,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-10-19 17:57:18,888 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 11 [2020-10-19 17:57:18,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:57:18,889 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-10-19 17:57:18,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 17:57:18,890 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-10-19 17:57:18,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-19 17:57:18,891 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:57:18,891 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:57:18,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-19 17:57:18,892 INFO L429 AbstractCegarLoop]: === Iteration 2 === [cmemrchrErr1REQUIRES_VIOLATION, cmemrchrErr0REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 17:57:18,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:57:18,892 INFO L82 PathProgramCache]: Analyzing trace with hash -840380261, now seen corresponding path program 1 times [2020-10-19 17:57:18,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:57:18,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021621270] [2020-10-19 17:57:18,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:57:18,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:57:18,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:57:18,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:57:19,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:57:19,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021621270] [2020-10-19 17:57:19,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 17:57:19,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 17:57:19,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458463617] [2020-10-19 17:57:19,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 17:57:19,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:57:19,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 17:57:19,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-19 17:57:19,010 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 5 states. [2020-10-19 17:57:19,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:57:19,154 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2020-10-19 17:57:19,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 17:57:19,155 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-10-19 17:57:19,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:57:19,156 INFO L225 Difference]: With dead ends: 34 [2020-10-19 17:57:19,157 INFO L226 Difference]: Without dead ends: 34 [2020-10-19 17:57:19,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-19 17:57:19,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-19 17:57:19,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-10-19 17:57:19,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-19 17:57:19,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2020-10-19 17:57:19,166 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 11 [2020-10-19 17:57:19,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:57:19,166 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2020-10-19 17:57:19,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 17:57:19,167 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2020-10-19 17:57:19,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-19 17:57:19,168 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:57:19,168 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:57:19,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-19 17:57:19,169 INFO L429 AbstractCegarLoop]: === Iteration 3 === [cmemrchrErr1REQUIRES_VIOLATION, cmemrchrErr0REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 17:57:19,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:57:19,169 INFO L82 PathProgramCache]: Analyzing trace with hash 361396958, now seen corresponding path program 1 times [2020-10-19 17:57:19,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:57:19,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858072335] [2020-10-19 17:57:19,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:57:19,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:57:19,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:57:19,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:57:19,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:57:19,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858072335] [2020-10-19 17:57:19,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179132044] [2020-10-19 17:57:19,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:57:19,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:57:19,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-19 17:57:19,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 17:57:19,547 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-10-19 17:57:19,548 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 17:57:19,556 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 17:57:19,557 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-19 17:57:19,557 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-10-19 17:57:19,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:57:19,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 17:57:19,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-10-19 17:57:19,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233467329] [2020-10-19 17:57:19,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-19 17:57:19,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:57:19,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-19 17:57:19,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-19 17:57:19,603 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 7 states. [2020-10-19 17:57:19,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:57:19,725 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-10-19 17:57:19,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 17:57:19,726 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-10-19 17:57:19,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:57:19,727 INFO L225 Difference]: With dead ends: 33 [2020-10-19 17:57:19,728 INFO L226 Difference]: Without dead ends: 33 [2020-10-19 17:57:19,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-19 17:57:19,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-19 17:57:19,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2020-10-19 17:57:19,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-19 17:57:19,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-10-19 17:57:19,734 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 15 [2020-10-19 17:57:19,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:57:19,735 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-10-19 17:57:19,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-19 17:57:19,735 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-10-19 17:57:19,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-19 17:57:19,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:57:19,737 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:57:19,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-19 17:57:19,950 INFO L429 AbstractCegarLoop]: === Iteration 4 === [cmemrchrErr1REQUIRES_VIOLATION, cmemrchrErr0REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 17:57:19,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:57:19,950 INFO L82 PathProgramCache]: Analyzing trace with hash 25874007, now seen corresponding path program 1 times [2020-10-19 17:57:19,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:57:19,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512534620] [2020-10-19 17:57:19,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:57:19,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:57:20,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:57:20,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:57:20,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:57:20,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512534620] [2020-10-19 17:57:20,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 17:57:20,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-19 17:57:20,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776910282] [2020-10-19 17:57:20,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-19 17:57:20,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:57:20,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-19 17:57:20,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-19 17:57:20,061 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 8 states. [2020-10-19 17:57:20,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:57:20,271 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2020-10-19 17:57:20,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-19 17:57:20,272 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-10-19 17:57:20,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:57:20,276 INFO L225 Difference]: With dead ends: 32 [2020-10-19 17:57:20,276 INFO L226 Difference]: Without dead ends: 32 [2020-10-19 17:57:20,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-19 17:57:20,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-19 17:57:20,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2020-10-19 17:57:20,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-19 17:57:20,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2020-10-19 17:57:20,284 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 19 [2020-10-19 17:57:20,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:57:20,284 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2020-10-19 17:57:20,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-19 17:57:20,285 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2020-10-19 17:57:20,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-19 17:57:20,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:57:20,286 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:57:20,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-19 17:57:20,287 INFO L429 AbstractCegarLoop]: === Iteration 5 === [cmemrchrErr1REQUIRES_VIOLATION, cmemrchrErr0REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 17:57:20,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:57:20,287 INFO L82 PathProgramCache]: Analyzing trace with hash 25874008, now seen corresponding path program 1 times [2020-10-19 17:57:20,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:57:20,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423778735] [2020-10-19 17:57:20,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:57:20,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:57:20,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:57:20,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:57:20,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:57:20,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423778735] [2020-10-19 17:57:20,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710682223] [2020-10-19 17:57:20,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:57:20,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:57:20,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 32 conjunts are in the unsatisfiable core [2020-10-19 17:57:20,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 17:57:20,737 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-10-19 17:57:20,738 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 17:57:20,746 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 17:57:20,747 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-19 17:57:20,747 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:15 [2020-10-19 17:57:20,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 17:57:20,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-19 17:57:20,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 18 [2020-10-19 17:57:20,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494875064] [2020-10-19 17:57:20,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-19 17:57:20,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:57:20,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-19 17:57:20,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-10-19 17:57:20,920 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 9 states. [2020-10-19 17:57:21,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:57:21,145 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2020-10-19 17:57:21,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-19 17:57:21,146 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-10-19 17:57:21,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:57:21,147 INFO L225 Difference]: With dead ends: 35 [2020-10-19 17:57:21,148 INFO L226 Difference]: Without dead ends: 35 [2020-10-19 17:57:21,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2020-10-19 17:57:21,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-19 17:57:21,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2020-10-19 17:57:21,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-19 17:57:21,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-10-19 17:57:21,154 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 19 [2020-10-19 17:57:21,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:57:21,155 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-10-19 17:57:21,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-19 17:57:21,155 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-10-19 17:57:21,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-19 17:57:21,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:57:21,157 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] [2020-10-19 17:57:21,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:57:21,369 INFO L429 AbstractCegarLoop]: === Iteration 6 === [cmemrchrErr1REQUIRES_VIOLATION, cmemrchrErr0REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 17:57:21,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:57:21,370 INFO L82 PathProgramCache]: Analyzing trace with hash 2125510050, now seen corresponding path program 1 times [2020-10-19 17:57:21,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:57:21,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535809248] [2020-10-19 17:57:21,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:57:21,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:57:21,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:57:21,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:57:21,580 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:57:21,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535809248] [2020-10-19 17:57:21,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958946936] [2020-10-19 17:57:21,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:57:21,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:57:21,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-19 17:57:21,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 17:57:21,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:57:21,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 17:57:21,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2020-10-19 17:57:21,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153405191] [2020-10-19 17:57:21,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-19 17:57:21,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:57:21,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-19 17:57:21,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-19 17:57:21,748 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 12 states. [2020-10-19 17:57:22,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:57:22,066 INFO L93 Difference]: Finished difference Result 63 states and 69 transitions. [2020-10-19 17:57:22,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-19 17:57:22,067 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 24 [2020-10-19 17:57:22,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:57:22,069 INFO L225 Difference]: With dead ends: 63 [2020-10-19 17:57:22,069 INFO L226 Difference]: Without dead ends: 63 [2020-10-19 17:57:22,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-10-19 17:57:22,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-19 17:57:22,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-10-19 17:57:22,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-19 17:57:22,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2020-10-19 17:57:22,078 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 24 [2020-10-19 17:57:22,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:57:22,078 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2020-10-19 17:57:22,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-19 17:57:22,079 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2020-10-19 17:57:22,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-19 17:57:22,080 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:57:22,080 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:57:22,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:57:22,292 INFO L429 AbstractCegarLoop]: === Iteration 7 === [cmemrchrErr1REQUIRES_VIOLATION, cmemrchrErr0REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 17:57:22,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:57:22,293 INFO L82 PathProgramCache]: Analyzing trace with hash 2125031501, now seen corresponding path program 1 times [2020-10-19 17:57:22,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:57:22,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891499275] [2020-10-19 17:57:22,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:57:22,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:57:22,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:57:22,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:57:22,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-19 17:57:22,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:57:22,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 17:57:22,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891499275] [2020-10-19 17:57:22,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 17:57:22,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 17:57:22,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931622106] [2020-10-19 17:57:22,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 17:57:22,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:57:22,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 17:57:22,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-19 17:57:22,375 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand 5 states. [2020-10-19 17:57:22,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:57:22,439 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2020-10-19 17:57:22,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 17:57:22,440 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-10-19 17:57:22,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:57:22,441 INFO L225 Difference]: With dead ends: 51 [2020-10-19 17:57:22,441 INFO L226 Difference]: Without dead ends: 29 [2020-10-19 17:57:22,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-19 17:57:22,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-19 17:57:22,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-19 17:57:22,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-19 17:57:22,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-19 17:57:22,445 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 24 [2020-10-19 17:57:22,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:57:22,445 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-19 17:57:22,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 17:57:22,446 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-19 17:57:22,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-19 17:57:22,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:57:22,446 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:57:22,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-19 17:57:22,447 INFO L429 AbstractCegarLoop]: === Iteration 8 === [cmemrchrErr1REQUIRES_VIOLATION, cmemrchrErr0REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 17:57:22,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:57:22,447 INFO L82 PathProgramCache]: Analyzing trace with hash -912322497, now seen corresponding path program 2 times [2020-10-19 17:57:22,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:57:22,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275119720] [2020-10-19 17:57:22,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:57:22,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:57:22,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:57:22,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:57:22,704 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:57:22,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275119720] [2020-10-19 17:57:22,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333734055] [2020-10-19 17:57:22,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:57:22,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 17:57:22,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 17:57:22,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 39 conjunts are in the unsatisfiable core [2020-10-19 17:57:22,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 17:57:22,844 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-10-19 17:57:22,845 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 17:57:22,852 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 17:57:22,853 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-19 17:57:22,854 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:18 [2020-10-19 17:57:23,175 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:57:23,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 17:57:23,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 23 [2020-10-19 17:57:23,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646186400] [2020-10-19 17:57:23,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-19 17:57:23,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:57:23,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-19 17:57:23,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2020-10-19 17:57:23,178 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 24 states. [2020-10-19 17:57:24,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:57:24,755 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2020-10-19 17:57:24,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-19 17:57:24,756 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-19 17:57:24,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:57:24,758 INFO L225 Difference]: With dead ends: 59 [2020-10-19 17:57:24,758 INFO L226 Difference]: Without dead ends: 59 [2020-10-19 17:57:24,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=268, Invalid=1802, Unknown=0, NotChecked=0, Total=2070 [2020-10-19 17:57:24,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-19 17:57:24,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2020-10-19 17:57:24,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-19 17:57:24,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-10-19 17:57:24,765 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 28 [2020-10-19 17:57:24,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:57:24,766 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-10-19 17:57:24,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-19 17:57:24,766 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-10-19 17:57:24,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-19 17:57:24,767 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:57:24,767 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:57:24,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:57:24,972 INFO L429 AbstractCegarLoop]: === Iteration 9 === [cmemrchrErr1REQUIRES_VIOLATION, cmemrchrErr0REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 17:57:24,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:57:24,973 INFO L82 PathProgramCache]: Analyzing trace with hash 407669787, now seen corresponding path program 3 times [2020-10-19 17:57:24,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:57:24,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699165715] [2020-10-19 17:57:24,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:57:25,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:57:25,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:57:25,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:57:25,185 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:57:25,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699165715] [2020-10-19 17:57:25,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869347866] [2020-10-19 17:57:25,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:57:25,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-19 17:57:25,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 17:57:25,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-19 17:57:25,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 17:57:25,298 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-10-19 17:57:25,298 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 17:57:25,302 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 17:57:25,303 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-19 17:57:25,303 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-10-19 17:57:25,524 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-10-19 17:57:25,525 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 17:57:25,535 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 17:57:25,535 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-19 17:57:25,535 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:9 [2020-10-19 17:57:25,677 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:57:25,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 17:57:25,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 24 [2020-10-19 17:57:25,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971374234] [2020-10-19 17:57:25,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-19 17:57:25,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:57:25,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-19 17:57:25,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=502, Unknown=0, NotChecked=0, Total=552 [2020-10-19 17:57:25,679 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 24 states. [2020-10-19 17:57:26,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:57:26,582 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-10-19 17:57:26,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-19 17:57:26,583 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 33 [2020-10-19 17:57:26,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:57:26,584 INFO L225 Difference]: With dead ends: 54 [2020-10-19 17:57:26,584 INFO L226 Difference]: Without dead ends: 41 [2020-10-19 17:57:26,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=182, Invalid=1300, Unknown=0, NotChecked=0, Total=1482 [2020-10-19 17:57:26,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-19 17:57:26,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-10-19 17:57:26,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-19 17:57:26,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-10-19 17:57:26,589 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 33 [2020-10-19 17:57:26,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:57:26,590 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-10-19 17:57:26,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-19 17:57:26,590 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-10-19 17:57:26,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-19 17:57:26,591 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:57:26,591 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:57:26,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:57:26,795 INFO L429 AbstractCegarLoop]: === Iteration 10 === [cmemrchrErr1REQUIRES_VIOLATION, cmemrchrErr0REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 17:57:26,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:57:26,796 INFO L82 PathProgramCache]: Analyzing trace with hash -605171170, now seen corresponding path program 4 times [2020-10-19 17:57:26,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:57:26,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810884106] [2020-10-19 17:57:26,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:57:26,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:57:27,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:57:27,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:57:27,171 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:57:27,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810884106] [2020-10-19 17:57:27,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439489090] [2020-10-19 17:57:27,172 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:57:27,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-19 17:57:27,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 17:57:27,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 40 conjunts are in the unsatisfiable core [2020-10-19 17:57:27,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 17:57:27,588 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 17:57:27,923 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:57:27,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 17:57:27,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2020-10-19 17:57:27,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389173315] [2020-10-19 17:57:27,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-19 17:57:27,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:57:27,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-19 17:57:27,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=795, Unknown=0, NotChecked=0, Total=870 [2020-10-19 17:57:27,926 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 30 states. [2020-10-19 17:57:29,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:57:29,715 INFO L93 Difference]: Finished difference Result 73 states and 76 transitions. [2020-10-19 17:57:29,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-19 17:57:29,715 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 37 [2020-10-19 17:57:29,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:57:29,716 INFO L225 Difference]: With dead ends: 73 [2020-10-19 17:57:29,717 INFO L226 Difference]: Without dead ends: 73 [2020-10-19 17:57:29,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 708 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=389, Invalid=3033, Unknown=0, NotChecked=0, Total=3422 [2020-10-19 17:57:29,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-19 17:57:29,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 43. [2020-10-19 17:57:29,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-19 17:57:29,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-10-19 17:57:29,724 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 37 [2020-10-19 17:57:29,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:57:29,724 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-10-19 17:57:29,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-19 17:57:29,725 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-10-19 17:57:29,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-19 17:57:29,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:57:29,726 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:57:29,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:57:29,939 INFO L429 AbstractCegarLoop]: === Iteration 11 === [cmemrchrErr1REQUIRES_VIOLATION, cmemrchrErr0REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 17:57:29,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:57:29,940 INFO L82 PathProgramCache]: Analyzing trace with hash 446111132, now seen corresponding path program 5 times [2020-10-19 17:57:29,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:57:29,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447973913] [2020-10-19 17:57:29,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:57:29,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:57:30,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:57:30,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:57:30,167 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:57:30,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447973913] [2020-10-19 17:57:30,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428022067] [2020-10-19 17:57:30,169 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:57:30,301 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-19 17:57:30,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 17:57:30,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-19 17:57:30,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 17:57:30,382 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:57:30,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 17:57:30,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 16 [2020-10-19 17:57:30,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883588415] [2020-10-19 17:57:30,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-19 17:57:30,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:57:30,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-19 17:57:30,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2020-10-19 17:57:30,384 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 16 states. [2020-10-19 17:57:30,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:57:30,818 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2020-10-19 17:57:30,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-19 17:57:30,819 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2020-10-19 17:57:30,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:57:30,820 INFO L225 Difference]: With dead ends: 68 [2020-10-19 17:57:30,820 INFO L226 Difference]: Without dead ends: 50 [2020-10-19 17:57:30,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2020-10-19 17:57:30,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-19 17:57:30,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-10-19 17:57:30,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-19 17:57:30,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-10-19 17:57:30,827 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 42 [2020-10-19 17:57:30,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:57:30,827 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-10-19 17:57:30,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-19 17:57:30,828 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-10-19 17:57:30,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-19 17:57:30,829 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:57:30,829 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:57:31,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:57:31,034 INFO L429 AbstractCegarLoop]: === Iteration 12 === [cmemrchrErr1REQUIRES_VIOLATION, cmemrchrErr0REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 17:57:31,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:57:31,035 INFO L82 PathProgramCache]: Analyzing trace with hash -840897799, now seen corresponding path program 6 times [2020-10-19 17:57:31,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:57:31,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051408649] [2020-10-19 17:57:31,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:57:31,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:57:31,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:57:31,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:57:31,587 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:57:31,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051408649] [2020-10-19 17:57:31,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149967031] [2020-10-19 17:57:31,588 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:57:31,695 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-19 17:57:31,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 17:57:31,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 58 conjunts are in the unsatisfiable core [2020-10-19 17:57:31,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 17:57:31,778 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-10-19 17:57:31,778 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 17:57:31,787 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 17:57:31,787 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-19 17:57:31,787 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:18 [2020-10-19 17:57:32,205 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 17:57:32,818 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:57:32,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 17:57:32,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 38 [2020-10-19 17:57:32,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110406412] [2020-10-19 17:57:32,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-19 17:57:32,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:57:32,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-19 17:57:32,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1381, Unknown=0, NotChecked=0, Total=1482 [2020-10-19 17:57:32,821 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 39 states. [2020-10-19 17:57:34,200 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 49 [2020-10-19 17:57:34,458 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 47 [2020-10-19 17:57:34,641 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2020-10-19 17:57:34,810 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2020-10-19 17:57:35,007 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2020-10-19 17:57:35,549 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2020-10-19 17:57:36,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:57:36,066 INFO L93 Difference]: Finished difference Result 81 states and 84 transitions. [2020-10-19 17:57:36,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-19 17:57:36,067 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 46 [2020-10-19 17:57:36,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:57:36,068 INFO L225 Difference]: With dead ends: 81 [2020-10-19 17:57:36,068 INFO L226 Difference]: Without dead ends: 81 [2020-10-19 17:57:36,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=307, Invalid=3475, Unknown=0, NotChecked=0, Total=3782 [2020-10-19 17:57:36,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-19 17:57:36,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2020-10-19 17:57:36,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-19 17:57:36,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2020-10-19 17:57:36,075 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 46 [2020-10-19 17:57:36,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:57:36,075 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2020-10-19 17:57:36,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-19 17:57:36,076 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2020-10-19 17:57:36,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-19 17:57:36,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:57:36,077 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:57:36,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-10-19 17:57:36,280 INFO L429 AbstractCegarLoop]: === Iteration 13 === [cmemrchrErr1REQUIRES_VIOLATION, cmemrchrErr0REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 17:57:36,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:57:36,281 INFO L82 PathProgramCache]: Analyzing trace with hash 43696598, now seen corresponding path program 7 times [2020-10-19 17:57:36,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:57:36,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448958036] [2020-10-19 17:57:36,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:57:36,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:57:36,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:57:36,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:57:36,760 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:57:36,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448958036] [2020-10-19 17:57:36,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708626783] [2020-10-19 17:57:36,762 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:57:36,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:57:36,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 48 conjunts are in the unsatisfiable core [2020-10-19 17:57:36,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 17:57:36,896 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-10-19 17:57:36,897 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 17:57:36,903 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 17:57:36,903 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-19 17:57:36,903 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:15 [2020-10-19 17:57:37,265 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 17:57:37,672 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 28 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:57:37,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 17:57:37,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2020-10-19 17:57:37,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73486608] [2020-10-19 17:57:37,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-19 17:57:37,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:57:37,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-19 17:57:37,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1096, Unknown=0, NotChecked=0, Total=1190 [2020-10-19 17:57:37,674 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 35 states. [2020-10-19 17:57:39,266 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2020-10-19 17:57:40,027 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2020-10-19 17:57:40,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:57:40,820 INFO L93 Difference]: Finished difference Result 117 states and 121 transitions. [2020-10-19 17:57:40,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-19 17:57:40,821 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 50 [2020-10-19 17:57:40,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:57:40,823 INFO L225 Difference]: With dead ends: 117 [2020-10-19 17:57:40,823 INFO L226 Difference]: Without dead ends: 117 [2020-10-19 17:57:40,825 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=385, Invalid=3775, Unknown=0, NotChecked=0, Total=4160 [2020-10-19 17:57:40,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-19 17:57:40,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 52. [2020-10-19 17:57:40,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-19 17:57:40,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-10-19 17:57:40,833 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 50 [2020-10-19 17:57:40,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:57:40,833 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-10-19 17:57:40,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-19 17:57:40,834 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-10-19 17:57:40,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-19 17:57:40,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:57:40,835 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:57:41,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:57:41,048 INFO L429 AbstractCegarLoop]: === Iteration 14 === [cmemrchrErr1REQUIRES_VIOLATION, cmemrchrErr0REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 17:57:41,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:57:41,049 INFO L82 PathProgramCache]: Analyzing trace with hash -762817119, now seen corresponding path program 8 times [2020-10-19 17:57:41,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:57:41,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848354890] [2020-10-19 17:57:41,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:57:41,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:57:41,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:57:41,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:57:41,327 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:57:41,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848354890] [2020-10-19 17:57:41,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209907062] [2020-10-19 17:57:41,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:57:41,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 17:57:41,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 17:57:41,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-19 17:57:41,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 17:57:41,532 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:57:41,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 17:57:41,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 18 [2020-10-19 17:57:41,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935496026] [2020-10-19 17:57:41,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-19 17:57:41,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:57:41,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-19 17:57:41,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2020-10-19 17:57:41,536 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 18 states. [2020-10-19 17:57:42,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:57:42,161 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2020-10-19 17:57:42,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-19 17:57:42,162 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 51 [2020-10-19 17:57:42,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:57:42,163 INFO L225 Difference]: With dead ends: 82 [2020-10-19 17:57:42,164 INFO L226 Difference]: Without dead ends: 59 [2020-10-19 17:57:42,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2020-10-19 17:57:42,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-19 17:57:42,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2020-10-19 17:57:42,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-19 17:57:42,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-10-19 17:57:42,169 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 51 [2020-10-19 17:57:42,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:57:42,170 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-10-19 17:57:42,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-19 17:57:42,170 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-10-19 17:57:42,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-19 17:57:42,171 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:57:42,172 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:57:42,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:57:42,384 INFO L429 AbstractCegarLoop]: === Iteration 15 === [cmemrchrErr1REQUIRES_VIOLATION, cmemrchrErr0REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-10-19 17:57:42,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:57:42,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1336099044, now seen corresponding path program 9 times [2020-10-19 17:57:42,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:57:42,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267238829] [2020-10-19 17:57:42,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:57:42,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:57:42,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:57:42,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:57:42,960 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:57:42,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267238829] [2020-10-19 17:57:42,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372933903] [2020-10-19 17:57:42,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:57:43,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-19 17:57:43,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 17:57:43,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 53 conjunts are in the unsatisfiable core [2020-10-19 17:57:43,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 17:57:46,629 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 43 [2020-10-19 17:57:46,643 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 23 proven. 32 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-19 17:57:46,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 17:57:46,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 39 [2020-10-19 17:57:46,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962914171] [2020-10-19 17:57:46,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-19 17:57:46,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:57:46,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-19 17:57:46,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1464, Unknown=0, NotChecked=0, Total=1560 [2020-10-19 17:57:46,646 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 40 states. [2020-10-19 17:57:51,067 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 69 [2020-10-19 17:57:51,355 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2020-10-19 17:57:51,834 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 74 [2020-10-19 17:57:52,143 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 65 [2020-10-19 17:57:52,616 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 72 [2020-10-19 17:57:53,437 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-10-19 17:57:53,985 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 60 [2020-10-19 17:57:54,276 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 60 [2020-10-19 17:57:54,666 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 74 [2020-10-19 17:57:55,035 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 73 [2020-10-19 17:57:55,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:57:55,161 INFO L93 Difference]: Finished difference Result 95 states and 98 transitions. [2020-10-19 17:57:55,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-19 17:57:55,162 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 55 [2020-10-19 17:57:55,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:57:55,162 INFO L225 Difference]: With dead ends: 95 [2020-10-19 17:57:55,162 INFO L226 Difference]: Without dead ends: 0 [2020-10-19 17:57:55,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1535 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=693, Invalid=7317, Unknown=0, NotChecked=0, Total=8010 [2020-10-19 17:57:55,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-19 17:57:55,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-19 17:57:55,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-19 17:57:55,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-19 17:57:55,167 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 55 [2020-10-19 17:57:55,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:57:55,167 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 17:57:55,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-19 17:57:55,168 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-19 17:57:55,168 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-19 17:57:55,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-19 17:57:55,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.10 05:57:55 BoogieIcfgContainer [2020-10-19 17:57:55,374 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-19 17:57:55,375 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 17:57:55,375 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 17:57:55,375 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 17:57:55,376 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 05:57:18" (3/4) ... [2020-10-19 17:57:55,379 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-19 17:57:55,386 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2020-10-19 17:57:55,386 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure cmemrchr [2020-10-19 17:57:55,386 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2020-10-19 17:57:55,386 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2020-10-19 17:57:55,386 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint16_identity [2020-10-19 17:57:55,387 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint64_identity [2020-10-19 17:57:55,387 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2020-10-19 17:57:55,387 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint32_identity [2020-10-19 17:57:55,391 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2020-10-19 17:57:55,391 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2020-10-19 17:57:55,392 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-19 17:57:55,438 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-19 17:57:55,438 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 17:57:55,439 INFO L168 Benchmark]: Toolchain (without parser) took 38448.66 ms. Allocated memory was 1.0 GB in the beginning and 1.5 GB in the end (delta: 500.2 MB). Free memory was 951.9 MB in the beginning and 1.4 GB in the end (delta: -399.5 MB). Peak memory consumption was 100.6 MB. Max. memory is 11.5 GB. [2020-10-19 17:57:55,440 INFO L168 Benchmark]: CDTParser took 0.41 ms. Allocated memory is still 1.0 GB. Free memory is still 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 17:57:55,440 INFO L168 Benchmark]: CACSL2BoogieTranslator took 651.23 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.9 MB). Free memory was 946.5 MB in the beginning and 1.1 GB in the end (delta: -174.7 MB). Peak memory consumption was 22.3 MB. Max. memory is 11.5 GB. [2020-10-19 17:57:55,441 INFO L168 Benchmark]: Boogie Preprocessor took 69.83 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. [2020-10-19 17:57:55,441 INFO L168 Benchmark]: RCFGBuilder took 627.26 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 44.3 MB). Peak memory consumption was 44.3 MB. Max. memory is 11.5 GB. [2020-10-19 17:57:55,442 INFO L168 Benchmark]: TraceAbstraction took 37025.23 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 361.2 MB). Free memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: -281.1 MB). Peak memory consumption was 80.1 MB. Max. memory is 11.5 GB. [2020-10-19 17:57:55,442 INFO L168 Benchmark]: Witness Printer took 63.13 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 17:57:55,445 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.41 ms. Allocated memory is still 1.0 GB. Free memory is still 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 651.23 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.9 MB). Free memory was 946.5 MB in the beginning and 1.1 GB in the end (delta: -174.7 MB). Peak memory consumption was 22.3 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 69.83 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. * RCFGBuilder took 627.26 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 44.3 MB). Peak memory consumption was 44.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 37025.23 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 361.2 MB). Free memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: -281.1 MB). Peak memory consumption was 80.1 MB. Max. memory is 11.5 GB. * Witness Printer took 63.13 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 520]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 520]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 527]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 541]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 541]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 5 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 49 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 36.9s, OverallIterations: 15, TraceHistogramMax: 5, AutomataDifference: 21.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 321 SDtfs, 1130 SDslu, 1522 SDs, 0 SdLazy, 7087 SolverSat, 365 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 784 GetRequests, 322 SyntacticMatches, 6 SemanticMatches, 456 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4520 ImplicationChecksByTransitivity, 23.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 15 MinimizatonAttempts, 174 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 11.0s InterpolantComputationTime, 865 NumberOfCodeBlocks, 861 NumberOfCodeBlocksAsserted, 42 NumberOfCheckSat, 839 ConstructedInterpolants, 2 QuantifiedInterpolants, 347318 SizeOfPredicates, 75 NumberOfNonLiveVariables, 1839 ConjunctsInSsa, 365 ConjunctsInUnsatCore, 26 InterpolantComputations, 5 PerfectInterpolantSequences, 130/708 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 correct! Received shutdown request...