./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrchr-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_0efb28d9-99a5-4ee7-a2ab-02025aae92ca/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_0efb28d9-99a5-4ee7-a2ab-02025aae92ca/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_0efb28d9-99a5-4ee7-a2ab-02025aae92ca/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_0efb28d9-99a5-4ee7-a2ab-02025aae92ca/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrchr-alloca-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_0efb28d9-99a5-4ee7-a2ab-02025aae92ca/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_0efb28d9-99a5-4ee7-a2ab-02025aae92ca/bin/uautomizer --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 276936ba1494f32a328b3de86f664a380d5263e9 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 14:35:37,357 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 14:35:37,358 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 14:35:37,366 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 14:35:37,366 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 14:35:37,367 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 14:35:37,368 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 14:35:37,370 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 14:35:37,371 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 14:35:37,372 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 14:35:37,373 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 14:35:37,374 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 14:35:37,374 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 14:35:37,375 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 14:35:37,376 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 14:35:37,377 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 14:35:37,378 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 14:35:37,379 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 14:35:37,380 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 14:35:37,382 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 14:35:37,383 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 14:35:37,384 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 14:35:37,384 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 14:35:37,385 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 14:35:37,386 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 14:35:37,387 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 14:35:37,387 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 14:35:37,387 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 14:35:37,387 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 14:35:37,388 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 14:35:37,388 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 14:35:37,389 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 14:35:37,389 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 14:35:37,389 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 14:35:37,390 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 14:35:37,390 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 14:35:37,390 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 14:35:37,391 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 14:35:37,391 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 14:35:37,391 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 14:35:37,392 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 14:35:37,392 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_0efb28d9-99a5-4ee7-a2ab-02025aae92ca/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2019-12-07 14:35:37,402 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 14:35:37,402 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 14:35:37,403 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 14:35:37,403 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 14:35:37,403 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 14:35:37,403 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 14:35:37,403 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 14:35:37,403 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-12-07 14:35:37,403 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 14:35:37,404 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 14:35:37,404 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 14:35:37,404 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-12-07 14:35:37,404 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-12-07 14:35:37,404 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-12-07 14:35:37,404 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 14:35:37,404 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 14:35:37,404 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 14:35:37,405 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 14:35:37,405 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 14:35:37,405 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 14:35:37,405 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 14:35:37,405 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 14:35:37,405 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 14:35:37,405 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 14:35:37,405 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 14:35:37,406 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 14:35:37,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 14:35:37,406 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 14:35:37,406 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 -> /tmp/vcloud-vcloud-master/worker/run_dir_0efb28d9-99a5-4ee7-a2ab-02025aae92ca/bin/uautomizer 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 -> 276936ba1494f32a328b3de86f664a380d5263e9 [2019-12-07 14:35:37,504 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 14:35:37,512 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 14:35:37,514 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 14:35:37,515 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 14:35:37,515 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 14:35:37,515 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_0efb28d9-99a5-4ee7-a2ab-02025aae92ca/bin/uautomizer/../../sv-benchmarks/c/array-memsafety/cstrchr-alloca-2.i [2019-12-07 14:35:37,552 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0efb28d9-99a5-4ee7-a2ab-02025aae92ca/bin/uautomizer/data/758a42bbb/0b891fb0a6a546ae923b468f3f631a67/FLAG3b190b87c [2019-12-07 14:35:38,031 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 14:35:38,031 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_0efb28d9-99a5-4ee7-a2ab-02025aae92ca/sv-benchmarks/c/array-memsafety/cstrchr-alloca-2.i [2019-12-07 14:35:38,041 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0efb28d9-99a5-4ee7-a2ab-02025aae92ca/bin/uautomizer/data/758a42bbb/0b891fb0a6a546ae923b468f3f631a67/FLAG3b190b87c [2019-12-07 14:35:38,052 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_0efb28d9-99a5-4ee7-a2ab-02025aae92ca/bin/uautomizer/data/758a42bbb/0b891fb0a6a546ae923b468f3f631a67 [2019-12-07 14:35:38,054 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 14:35:38,056 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-12-07 14:35:38,056 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 14:35:38,056 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 14:35:38,059 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 14:35:38,060 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 02:35:38" (1/1) ... [2019-12-07 14:35:38,061 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7066884f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:35:38, skipping insertion in model container [2019-12-07 14:35:38,061 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 02:35:38" (1/1) ... [2019-12-07 14:35:38,066 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 14:35:38,095 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 14:35:38,297 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 14:35:38,304 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 14:35:38,330 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 14:35:38,360 INFO L208 MainTranslator]: Completed translation [2019-12-07 14:35:38,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:35:38 WrapperNode [2019-12-07 14:35:38,361 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 14:35:38,361 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 14:35:38,361 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 14:35:38,361 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 14:35:38,369 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:35:38" (1/1) ... [2019-12-07 14:35:38,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:35:38" (1/1) ... [2019-12-07 14:35:38,379 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:35:38" (1/1) ... [2019-12-07 14:35:38,379 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:35:38" (1/1) ... [2019-12-07 14:35:38,388 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:35:38" (1/1) ... [2019-12-07 14:35:38,390 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:35:38" (1/1) ... [2019-12-07 14:35:38,393 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:35:38" (1/1) ... [2019-12-07 14:35:38,396 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 14:35:38,397 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 14:35:38,397 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 14:35:38,397 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 14:35:38,397 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:35:38" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0efb28d9-99a5-4ee7-a2ab-02025aae92ca/bin/uautomizer/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 [2019-12-07 14:35:38,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-12-07 14:35:38,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 14:35:38,435 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-12-07 14:35:38,435 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-12-07 14:35:38,435 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2019-12-07 14:35:38,436 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2019-12-07 14:35:38,436 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2019-12-07 14:35:38,436 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrchr [2019-12-07 14:35:38,436 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-12-07 14:35:38,436 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-12-07 14:35:38,436 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-12-07 14:35:38,436 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-12-07 14:35:38,436 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-12-07 14:35:38,436 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-12-07 14:35:38,436 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-12-07 14:35:38,436 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-12-07 14:35:38,437 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-12-07 14:35:38,437 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-12-07 14:35:38,437 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-12-07 14:35:38,437 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-12-07 14:35:38,437 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-12-07 14:35:38,437 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-12-07 14:35:38,437 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-12-07 14:35:38,437 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-12-07 14:35:38,437 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-12-07 14:35:38,437 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-12-07 14:35:38,437 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-12-07 14:35:38,437 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2019-12-07 14:35:38,437 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2019-12-07 14:35:38,437 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2019-12-07 14:35:38,438 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-12-07 14:35:38,438 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-12-07 14:35:38,438 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-12-07 14:35:38,438 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-12-07 14:35:38,438 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-12-07 14:35:38,438 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-12-07 14:35:38,438 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-12-07 14:35:38,438 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-12-07 14:35:38,438 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-12-07 14:35:38,438 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-12-07 14:35:38,438 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-12-07 14:35:38,438 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-12-07 14:35:38,438 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-12-07 14:35:38,439 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-12-07 14:35:38,439 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-12-07 14:35:38,439 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-12-07 14:35:38,439 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-12-07 14:35:38,439 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-12-07 14:35:38,439 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-12-07 14:35:38,439 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-12-07 14:35:38,439 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-12-07 14:35:38,439 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-12-07 14:35:38,439 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-12-07 14:35:38,439 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-12-07 14:35:38,439 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-12-07 14:35:38,439 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-12-07 14:35:38,439 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-12-07 14:35:38,439 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-12-07 14:35:38,440 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-12-07 14:35:38,440 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-12-07 14:35:38,440 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-12-07 14:35:38,440 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-12-07 14:35:38,440 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-12-07 14:35:38,440 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-12-07 14:35:38,440 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-12-07 14:35:38,440 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-12-07 14:35:38,440 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-12-07 14:35:38,440 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-12-07 14:35:38,440 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-12-07 14:35:38,440 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-12-07 14:35:38,440 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-12-07 14:35:38,441 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-12-07 14:35:38,441 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-12-07 14:35:38,441 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-12-07 14:35:38,441 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-12-07 14:35:38,441 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-12-07 14:35:38,441 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-12-07 14:35:38,441 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-12-07 14:35:38,441 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-12-07 14:35:38,441 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-12-07 14:35:38,441 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-12-07 14:35:38,441 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-12-07 14:35:38,441 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-12-07 14:35:38,442 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-12-07 14:35:38,442 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-12-07 14:35:38,442 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-12-07 14:35:38,442 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-12-07 14:35:38,442 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-12-07 14:35:38,442 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-12-07 14:35:38,442 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-12-07 14:35:38,442 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-12-07 14:35:38,442 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-12-07 14:35:38,442 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-12-07 14:35:38,442 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-12-07 14:35:38,443 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-12-07 14:35:38,443 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-12-07 14:35:38,443 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-12-07 14:35:38,443 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-12-07 14:35:38,443 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-12-07 14:35:38,443 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-12-07 14:35:38,443 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-12-07 14:35:38,443 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-12-07 14:35:38,443 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-12-07 14:35:38,443 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-12-07 14:35:38,443 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-12-07 14:35:38,444 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-12-07 14:35:38,444 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-12-07 14:35:38,444 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-12-07 14:35:38,444 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-12-07 14:35:38,444 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-12-07 14:35:38,444 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-12-07 14:35:38,444 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-12-07 14:35:38,444 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-12-07 14:35:38,444 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-12-07 14:35:38,444 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-12-07 14:35:38,444 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-12-07 14:35:38,444 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-12-07 14:35:38,445 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-12-07 14:35:38,445 INFO L130 BoogieDeclarations]: Found specification of procedure cstrchr [2019-12-07 14:35:38,445 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-07 14:35:38,445 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-12-07 14:35:38,445 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-07 14:35:38,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 14:35:38,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 14:35:38,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-12-07 14:35:38,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 14:35:38,687 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 14:35:38,687 INFO L287 CfgBuilder]: Removed 2 assume(true) statements. [2019-12-07 14:35:38,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 02:35:38 BoogieIcfgContainer [2019-12-07 14:35:38,688 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 14:35:38,689 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 14:35:38,689 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 14:35:38,691 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 14:35:38,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 02:35:38" (1/3) ... [2019-12-07 14:35:38,691 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11c7d1a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 02:35:38, skipping insertion in model container [2019-12-07 14:35:38,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:35:38" (2/3) ... [2019-12-07 14:35:38,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11c7d1a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 02:35:38, skipping insertion in model container [2019-12-07 14:35:38,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 02:35:38" (3/3) ... [2019-12-07 14:35:38,693 INFO L109 eAbstractionObserver]: Analyzing ICFG cstrchr-alloca-2.i [2019-12-07 14:35:38,699 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 14:35:38,703 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 11 error locations. [2019-12-07 14:35:38,710 INFO L249 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2019-12-07 14:35:38,722 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 14:35:38,722 INFO L374 AbstractCegarLoop]: Hoare is false [2019-12-07 14:35:38,722 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 14:35:38,722 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 14:35:38,722 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 14:35:38,722 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 14:35:38,722 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 14:35:38,723 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 14:35:38,732 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2019-12-07 14:35:38,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 14:35:38,738 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:35:38,738 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:35:38,738 INFO L410 AbstractCegarLoop]: === Iteration 1 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 14:35:38,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:35:38,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1287232828, now seen corresponding path program 1 times [2019-12-07 14:35:38,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:35:38,747 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432409953] [2019-12-07 14:35:38,748 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:35:38,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:35:38,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:35:38,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:35:38,856 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432409953] [2019-12-07 14:35:38,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 14:35:38,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 14:35:38,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521640372] [2019-12-07 14:35:38,860 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 14:35:38,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:35:38,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 14:35:38,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 14:35:38,871 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 3 states. [2019-12-07 14:35:38,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:35:38,923 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2019-12-07 14:35:38,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 14:35:38,924 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-12-07 14:35:38,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:35:38,930 INFO L225 Difference]: With dead ends: 43 [2019-12-07 14:35:38,930 INFO L226 Difference]: Without dead ends: 40 [2019-12-07 14:35:38,931 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 14:35:38,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-12-07 14:35:38,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-12-07 14:35:38,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-12-07 14:35:38,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2019-12-07 14:35:38,955 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 10 [2019-12-07 14:35:38,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:35:38,955 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2019-12-07 14:35:38,955 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 14:35:38,955 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2019-12-07 14:35:38,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 14:35:38,956 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:35:38,956 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:35:38,956 INFO L410 AbstractCegarLoop]: === Iteration 2 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 14:35:38,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:35:38,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1287232518, now seen corresponding path program 1 times [2019-12-07 14:35:38,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:35:38,957 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193368422] [2019-12-07 14:35:38,957 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:35:38,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:35:38,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:35:38,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:35:38,998 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193368422] [2019-12-07 14:35:38,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 14:35:38,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 14:35:38,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64409344] [2019-12-07 14:35:39,000 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 14:35:39,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:35:39,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 14:35:39,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 14:35:39,001 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 4 states. [2019-12-07 14:35:39,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:35:39,068 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2019-12-07 14:35:39,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 14:35:39,069 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2019-12-07 14:35:39,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:35:39,069 INFO L225 Difference]: With dead ends: 38 [2019-12-07 14:35:39,070 INFO L226 Difference]: Without dead ends: 38 [2019-12-07 14:35:39,070 INFO L630 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 [2019-12-07 14:35:39,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-12-07 14:35:39,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-12-07 14:35:39,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-12-07 14:35:39,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2019-12-07 14:35:39,074 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 10 [2019-12-07 14:35:39,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:35:39,074 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2019-12-07 14:35:39,074 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 14:35:39,074 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2019-12-07 14:35:39,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 14:35:39,074 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:35:39,074 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:35:39,075 INFO L410 AbstractCegarLoop]: === Iteration 3 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 14:35:39,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:35:39,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1287232519, now seen corresponding path program 1 times [2019-12-07 14:35:39,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:35:39,075 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550628097] [2019-12-07 14:35:39,075 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:35:39,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:35:39,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:35:39,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:35:39,126 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550628097] [2019-12-07 14:35:39,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 14:35:39,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 14:35:39,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524645014] [2019-12-07 14:35:39,126 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 14:35:39,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:35:39,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 14:35:39,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-12-07 14:35:39,127 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 5 states. [2019-12-07 14:35:39,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:35:39,201 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2019-12-07 14:35:39,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 14:35:39,202 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-12-07 14:35:39,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:35:39,202 INFO L225 Difference]: With dead ends: 37 [2019-12-07 14:35:39,203 INFO L226 Difference]: Without dead ends: 37 [2019-12-07 14:35:39,203 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-12-07 14:35:39,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-12-07 14:35:39,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-12-07 14:35:39,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-12-07 14:35:39,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2019-12-07 14:35:39,206 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 10 [2019-12-07 14:35:39,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:35:39,206 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2019-12-07 14:35:39,206 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 14:35:39,207 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2019-12-07 14:35:39,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 14:35:39,207 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:35:39,207 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:35:39,207 INFO L410 AbstractCegarLoop]: === Iteration 4 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 14:35:39,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:35:39,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1287232572, now seen corresponding path program 1 times [2019-12-07 14:35:39,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:35:39,208 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48703990] [2019-12-07 14:35:39,208 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:35:39,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:35:39,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:35:39,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:35:39,250 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48703990] [2019-12-07 14:35:39,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 14:35:39,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-07 14:35:39,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698409147] [2019-12-07 14:35:39,251 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 14:35:39,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:35:39,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 14:35:39,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-12-07 14:35:39,251 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 5 states. [2019-12-07 14:35:39,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:35:39,315 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2019-12-07 14:35:39,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 14:35:39,315 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-12-07 14:35:39,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:35:39,317 INFO L225 Difference]: With dead ends: 45 [2019-12-07 14:35:39,317 INFO L226 Difference]: Without dead ends: 45 [2019-12-07 14:35:39,317 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-12-07 14:35:39,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-12-07 14:35:39,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2019-12-07 14:35:39,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-12-07 14:35:39,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2019-12-07 14:35:39,323 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 10 [2019-12-07 14:35:39,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:35:39,323 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2019-12-07 14:35:39,324 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 14:35:39,324 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2019-12-07 14:35:39,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 14:35:39,324 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:35:39,324 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:35:39,324 INFO L410 AbstractCegarLoop]: === Iteration 5 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 14:35:39,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:35:39,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1287292154, now seen corresponding path program 1 times [2019-12-07 14:35:39,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:35:39,325 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251835924] [2019-12-07 14:35:39,325 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:35:39,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:35:39,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:35:39,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:35:39,370 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251835924] [2019-12-07 14:35:39,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 14:35:39,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 14:35:39,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139566380] [2019-12-07 14:35:39,370 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 14:35:39,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:35:39,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 14:35:39,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 14:35:39,371 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 5 states. [2019-12-07 14:35:39,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:35:39,450 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2019-12-07 14:35:39,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 14:35:39,451 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-12-07 14:35:39,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:35:39,451 INFO L225 Difference]: With dead ends: 49 [2019-12-07 14:35:39,452 INFO L226 Difference]: Without dead ends: 49 [2019-12-07 14:35:39,452 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-12-07 14:35:39,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-12-07 14:35:39,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2019-12-07 14:35:39,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-12-07 14:35:39,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2019-12-07 14:35:39,455 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 10 [2019-12-07 14:35:39,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:35:39,455 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2019-12-07 14:35:39,455 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 14:35:39,456 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2019-12-07 14:35:39,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-07 14:35:39,456 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:35:39,456 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:35:39,456 INFO L410 AbstractCegarLoop]: === Iteration 6 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 14:35:39,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:35:39,456 INFO L82 PathProgramCache]: Analyzing trace with hash -554371049, now seen corresponding path program 1 times [2019-12-07 14:35:39,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:35:39,457 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785405738] [2019-12-07 14:35:39,457 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:35:39,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:35:39,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:35:39,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:35:39,495 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785405738] [2019-12-07 14:35:39,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 14:35:39,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-07 14:35:39,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162557103] [2019-12-07 14:35:39,495 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 14:35:39,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:35:39,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 14:35:39,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-12-07 14:35:39,496 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 6 states. [2019-12-07 14:35:39,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:35:39,576 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2019-12-07 14:35:39,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 14:35:39,576 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2019-12-07 14:35:39,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:35:39,577 INFO L225 Difference]: With dead ends: 38 [2019-12-07 14:35:39,577 INFO L226 Difference]: Without dead ends: 38 [2019-12-07 14:35:39,577 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-12-07 14:35:39,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-12-07 14:35:39,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-12-07 14:35:39,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-12-07 14:35:39,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2019-12-07 14:35:39,581 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 14 [2019-12-07 14:35:39,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:35:39,582 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2019-12-07 14:35:39,582 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 14:35:39,582 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2019-12-07 14:35:39,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-07 14:35:39,582 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:35:39,582 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:35:39,583 INFO L410 AbstractCegarLoop]: === Iteration 7 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 14:35:39,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:35:39,583 INFO L82 PathProgramCache]: Analyzing trace with hash -554371048, now seen corresponding path program 1 times [2019-12-07 14:35:39,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:35:39,583 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039136031] [2019-12-07 14:35:39,583 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:35:39,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:35:39,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:35:39,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:35:39,653 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039136031] [2019-12-07 14:35:39,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 14:35:39,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-12-07 14:35:39,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627907589] [2019-12-07 14:35:39,654 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 14:35:39,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:35:39,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 14:35:39,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-12-07 14:35:39,654 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 8 states. [2019-12-07 14:35:39,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:35:39,790 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2019-12-07 14:35:39,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 14:35:39,791 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2019-12-07 14:35:39,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:35:39,792 INFO L225 Difference]: With dead ends: 49 [2019-12-07 14:35:39,793 INFO L226 Difference]: Without dead ends: 49 [2019-12-07 14:35:39,793 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-12-07 14:35:39,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-12-07 14:35:39,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2019-12-07 14:35:39,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-12-07 14:35:39,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2019-12-07 14:35:39,796 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 14 [2019-12-07 14:35:39,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:35:39,797 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2019-12-07 14:35:39,797 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 14:35:39,797 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2019-12-07 14:35:39,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-07 14:35:39,797 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:35:39,797 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:35:39,798 INFO L410 AbstractCegarLoop]: === Iteration 8 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 14:35:39,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:35:39,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1315055555, now seen corresponding path program 1 times [2019-12-07 14:35:39,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:35:39,798 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492410754] [2019-12-07 14:35:39,798 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:35:39,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:35:39,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:35:39,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:35:39,857 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492410754] [2019-12-07 14:35:39,857 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846636034] [2019-12-07 14:35:39,857 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0efb28d9-99a5-4ee7-a2ab-02025aae92ca/bin/uautomizer/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 [2019-12-07 14:35:39,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:35:39,926 INFO L264 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-07 14:35:39,931 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:35:39,972 INFO L377 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 [2019-12-07 14:35:39,972 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 14:35:39,979 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 14:35:39,979 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 14:35:39,979 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-12-07 14:35:39,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:35:39,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:35:39,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 6 [2019-12-07 14:35:39,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773658539] [2019-12-07 14:35:39,993 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 14:35:39,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:35:39,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 14:35:39,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-12-07 14:35:39,994 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand 7 states. [2019-12-07 14:35:40,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:35:40,086 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2019-12-07 14:35:40,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 14:35:40,086 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2019-12-07 14:35:40,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:35:40,087 INFO L225 Difference]: With dead ends: 52 [2019-12-07 14:35:40,087 INFO L226 Difference]: Without dead ends: 52 [2019-12-07 14:35:40,087 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-12-07 14:35:40,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-12-07 14:35:40,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2019-12-07 14:35:40,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-12-07 14:35:40,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2019-12-07 14:35:40,091 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 14 [2019-12-07 14:35:40,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:35:40,091 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2019-12-07 14:35:40,092 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 14:35:40,092 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2019-12-07 14:35:40,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-07 14:35:40,092 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:35:40,092 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:35:40,293 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:35:40,293 INFO L410 AbstractCegarLoop]: === Iteration 9 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 14:35:40,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:35:40,294 INFO L82 PathProgramCache]: Analyzing trace with hash -319565009, now seen corresponding path program 1 times [2019-12-07 14:35:40,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:35:40,295 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748741797] [2019-12-07 14:35:40,295 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:35:40,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:35:40,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:35:40,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:35:40,349 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748741797] [2019-12-07 14:35:40,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 14:35:40,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 14:35:40,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642772142] [2019-12-07 14:35:40,350 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 14:35:40,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:35:40,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 14:35:40,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 14:35:40,351 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 4 states. [2019-12-07 14:35:40,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:35:40,391 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2019-12-07 14:35:40,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 14:35:40,391 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2019-12-07 14:35:40,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:35:40,391 INFO L225 Difference]: With dead ends: 44 [2019-12-07 14:35:40,391 INFO L226 Difference]: Without dead ends: 44 [2019-12-07 14:35:40,392 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-12-07 14:35:40,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-12-07 14:35:40,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-12-07 14:35:40,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-12-07 14:35:40,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2019-12-07 14:35:40,394 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 18 [2019-12-07 14:35:40,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:35:40,394 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2019-12-07 14:35:40,394 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 14:35:40,394 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2019-12-07 14:35:40,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-07 14:35:40,395 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:35:40,395 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:35:40,395 INFO L410 AbstractCegarLoop]: === Iteration 10 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 14:35:40,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:35:40,395 INFO L82 PathProgramCache]: Analyzing trace with hash 2129811308, now seen corresponding path program 1 times [2019-12-07 14:35:40,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:35:40,396 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588101886] [2019-12-07 14:35:40,396 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:35:40,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:35:40,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:35:40,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:35:40,488 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588101886] [2019-12-07 14:35:40,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 14:35:40,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2019-12-07 14:35:40,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795743751] [2019-12-07 14:35:40,488 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 14:35:40,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:35:40,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 14:35:40,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-12-07 14:35:40,489 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 10 states. [2019-12-07 14:35:40,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:35:40,671 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2019-12-07 14:35:40,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-07 14:35:40,671 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2019-12-07 14:35:40,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:35:40,672 INFO L225 Difference]: With dead ends: 60 [2019-12-07 14:35:40,672 INFO L226 Difference]: Without dead ends: 60 [2019-12-07 14:35:40,672 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2019-12-07 14:35:40,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-12-07 14:35:40,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2019-12-07 14:35:40,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-12-07 14:35:40,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2019-12-07 14:35:40,676 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 20 [2019-12-07 14:35:40,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:35:40,677 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2019-12-07 14:35:40,677 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 14:35:40,677 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2019-12-07 14:35:40,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-07 14:35:40,677 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:35:40,677 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:35:40,678 INFO L410 AbstractCegarLoop]: === Iteration 11 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 14:35:40,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:35:40,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1118694058, now seen corresponding path program 1 times [2019-12-07 14:35:40,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:35:40,678 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778633970] [2019-12-07 14:35:40,678 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:35:40,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:35:40,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:35:40,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:35:40,777 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778633970] [2019-12-07 14:35:40,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 14:35:40,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2019-12-07 14:35:40,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666372075] [2019-12-07 14:35:40,778 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-07 14:35:40,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:35:40,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-07 14:35:40,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2019-12-07 14:35:40,778 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand 11 states. [2019-12-07 14:35:40,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:35:40,974 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2019-12-07 14:35:40,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-07 14:35:40,974 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2019-12-07 14:35:40,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:35:40,975 INFO L225 Difference]: With dead ends: 77 [2019-12-07 14:35:40,975 INFO L226 Difference]: Without dead ends: 77 [2019-12-07 14:35:40,975 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2019-12-07 14:35:40,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-12-07 14:35:40,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 58. [2019-12-07 14:35:40,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-12-07 14:35:40,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2019-12-07 14:35:40,979 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 20 [2019-12-07 14:35:40,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:35:40,979 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2019-12-07 14:35:40,979 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-07 14:35:40,979 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2019-12-07 14:35:40,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-12-07 14:35:40,979 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:35:40,980 INFO L410 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] [2019-12-07 14:35:40,980 INFO L410 AbstractCegarLoop]: === Iteration 12 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 14:35:40,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:35:40,980 INFO L82 PathProgramCache]: Analyzing trace with hash 842532891, now seen corresponding path program 1 times [2019-12-07 14:35:40,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:35:40,980 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190089277] [2019-12-07 14:35:40,980 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:35:40,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:35:41,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:35:41,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:35:41,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:35:41,021 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190089277] [2019-12-07 14:35:41,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 14:35:41,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 14:35:41,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118419123] [2019-12-07 14:35:41,021 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 14:35:41,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:35:41,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 14:35:41,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-12-07 14:35:41,022 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand 5 states. [2019-12-07 14:35:41,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:35:41,060 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2019-12-07 14:35:41,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 14:35:41,060 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2019-12-07 14:35:41,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:35:41,061 INFO L225 Difference]: With dead ends: 57 [2019-12-07 14:35:41,061 INFO L226 Difference]: Without dead ends: 34 [2019-12-07 14:35:41,061 INFO L630 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 [2019-12-07 14:35:41,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-12-07 14:35:41,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-12-07 14:35:41,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-12-07 14:35:41,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2019-12-07 14:35:41,063 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 24 [2019-12-07 14:35:41,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:35:41,063 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2019-12-07 14:35:41,063 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 14:35:41,063 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2019-12-07 14:35:41,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-12-07 14:35:41,064 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:35:41,064 INFO L410 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] [2019-12-07 14:35:41,064 INFO L410 AbstractCegarLoop]: === Iteration 13 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 14:35:41,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:35:41,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1168131629, now seen corresponding path program 1 times [2019-12-07 14:35:41,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:35:41,064 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180443747] [2019-12-07 14:35:41,064 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:35:41,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:35:41,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:35:41,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:35:41,139 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180443747] [2019-12-07 14:35:41,140 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748679332] [2019-12-07 14:35:41,140 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0efb28d9-99a5-4ee7-a2ab-02025aae92ca/bin/uautomizer/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 [2019-12-07 14:35:41,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:35:41,199 INFO L264 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2019-12-07 14:35:41,201 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:35:41,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:35:41,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:35:41,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2019-12-07 14:35:41,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450980297] [2019-12-07 14:35:41,266 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-07 14:35:41,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:35:41,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-07 14:35:41,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-12-07 14:35:41,267 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 16 states. [2019-12-07 14:35:41,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:35:41,439 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2019-12-07 14:35:41,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 14:35:41,439 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 24 [2019-12-07 14:35:41,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:35:41,440 INFO L225 Difference]: With dead ends: 42 [2019-12-07 14:35:41,440 INFO L226 Difference]: Without dead ends: 40 [2019-12-07 14:35:41,440 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2019-12-07 14:35:41,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-12-07 14:35:41,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-12-07 14:35:41,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-12-07 14:35:41,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2019-12-07 14:35:41,442 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 24 [2019-12-07 14:35:41,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:35:41,442 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2019-12-07 14:35:41,442 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-07 14:35:41,443 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2019-12-07 14:35:41,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-12-07 14:35:41,443 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:35:41,443 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:35:41,644 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:35:41,644 INFO L410 AbstractCegarLoop]: === Iteration 14 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 14:35:41,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:35:41,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1984823745, now seen corresponding path program 2 times [2019-12-07 14:35:41,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:35:41,645 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74732292] [2019-12-07 14:35:41,646 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:35:41,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:35:41,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:35:41,948 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:35:41,948 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74732292] [2019-12-07 14:35:41,948 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106477112] [2019-12-07 14:35:41,949 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0efb28d9-99a5-4ee7-a2ab-02025aae92ca/bin/uautomizer/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 [2019-12-07 14:35:42,006 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 14:35:42,006 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 14:35:42,007 INFO L264 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 24 conjunts are in the unsatisfiable core [2019-12-07 14:35:42,008 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:35:42,056 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2019-12-07 14:35:42,057 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 14:35:42,061 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 14:35:42,062 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 14:35:42,062 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2019-12-07 14:35:42,157 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 14:35:42,157 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2019-12-07 14:35:42,158 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-12-07 14:35:42,173 INFO L614 ElimStorePlain]: treesize reduction 8, result has 55.6 percent of original size [2019-12-07 14:35:42,174 INFO L534 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 14:35:42,174 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:24, output treesize:3 [2019-12-07 14:35:42,199 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:35:42,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:35:42,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2019-12-07 14:35:42,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071444561] [2019-12-07 14:35:42,200 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-12-07 14:35:42,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:35:42,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-12-07 14:35:42,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2019-12-07 14:35:42,200 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 23 states. [2019-12-07 14:35:42,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:35:42,552 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2019-12-07 14:35:42,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-07 14:35:42,552 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 30 [2019-12-07 14:35:42,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:35:42,553 INFO L225 Difference]: With dead ends: 60 [2019-12-07 14:35:42,553 INFO L226 Difference]: Without dead ends: 47 [2019-12-07 14:35:42,554 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2019-12-07 14:35:42,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-12-07 14:35:42,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2019-12-07 14:35:42,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-12-07 14:35:42,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2019-12-07 14:35:42,557 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 30 [2019-12-07 14:35:42,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:35:42,557 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2019-12-07 14:35:42,557 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-12-07 14:35:42,558 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2019-12-07 14:35:42,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-12-07 14:35:42,558 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:35:42,559 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:35:42,759 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:35:42,760 INFO L410 AbstractCegarLoop]: === Iteration 15 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 14:35:42,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:35:42,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1867650436, now seen corresponding path program 3 times [2019-12-07 14:35:42,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:35:42,761 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294621321] [2019-12-07 14:35:42,761 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:35:42,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:35:42,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:35:42,861 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:35:42,862 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294621321] [2019-12-07 14:35:42,862 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251970304] [2019-12-07 14:35:42,862 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0efb28d9-99a5-4ee7-a2ab-02025aae92ca/bin/uautomizer/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 [2019-12-07 14:35:42,923 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-07 14:35:42,923 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 14:35:42,924 INFO L264 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 25 conjunts are in the unsatisfiable core [2019-12-07 14:35:42,926 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:35:43,040 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:35:43,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:35:43,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2019-12-07 14:35:43,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956447403] [2019-12-07 14:35:43,041 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-07 14:35:43,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:35:43,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-07 14:35:43,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2019-12-07 14:35:43,041 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 20 states. [2019-12-07 14:35:43,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:35:43,307 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2019-12-07 14:35:43,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 14:35:43,307 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 34 [2019-12-07 14:35:43,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:35:43,308 INFO L225 Difference]: With dead ends: 52 [2019-12-07 14:35:43,308 INFO L226 Difference]: Without dead ends: 50 [2019-12-07 14:35:43,309 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2019-12-07 14:35:43,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-12-07 14:35:43,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-12-07 14:35:43,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-12-07 14:35:43,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2019-12-07 14:35:43,311 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 34 [2019-12-07 14:35:43,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:35:43,311 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2019-12-07 14:35:43,311 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-07 14:35:43,311 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2019-12-07 14:35:43,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-12-07 14:35:43,312 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:35:43,312 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:35:43,512 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:35:43,513 INFO L410 AbstractCegarLoop]: === Iteration 16 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 14:35:43,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:35:43,514 INFO L82 PathProgramCache]: Analyzing trace with hash -77155368, now seen corresponding path program 4 times [2019-12-07 14:35:43,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:35:43,515 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772121218] [2019-12-07 14:35:43,515 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:35:43,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:35:43,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:35:43,684 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:35:43,684 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772121218] [2019-12-07 14:35:43,684 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086300116] [2019-12-07 14:35:43,684 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0efb28d9-99a5-4ee7-a2ab-02025aae92ca/bin/uautomizer/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 [2019-12-07 14:35:43,743 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 14:35:43,743 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 14:35:43,744 INFO L264 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 28 conjunts are in the unsatisfiable core [2019-12-07 14:35:43,745 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:35:43,749 INFO L377 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 [2019-12-07 14:35:43,749 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 14:35:43,752 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 14:35:43,753 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 14:35:43,753 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-12-07 14:35:43,821 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-12-07 14:35:43,821 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 14:35:43,824 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 14:35:43,824 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 14:35:43,824 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2019-12-07 14:35:43,957 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2019-12-07 14:35:43,957 INFO L534 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 14:35:43,963 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 14:35:43,966 INFO L172 IndexEqualityManager]: detected equality via solver [2019-12-07 14:35:43,967 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 14:35:43,967 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2019-12-07 14:35:43,968 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 14:35:43,972 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 14:35:43,972 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 14:35:43,972 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:34, output treesize:3 [2019-12-07 14:35:43,978 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 17 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:35:43,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:35:43,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2019-12-07 14:35:43,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916273059] [2019-12-07 14:35:43,978 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-12-07 14:35:43,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:35:43,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-12-07 14:35:43,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2019-12-07 14:35:43,979 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 25 states. [2019-12-07 14:35:44,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:35:44,745 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2019-12-07 14:35:44,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-07 14:35:44,745 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 40 [2019-12-07 14:35:44,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:35:44,746 INFO L225 Difference]: With dead ends: 76 [2019-12-07 14:35:44,746 INFO L226 Difference]: Without dead ends: 57 [2019-12-07 14:35:44,746 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=166, Invalid=1240, Unknown=0, NotChecked=0, Total=1406 [2019-12-07 14:35:44,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-12-07 14:35:44,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2019-12-07 14:35:44,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-12-07 14:35:44,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2019-12-07 14:35:44,748 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 40 [2019-12-07 14:35:44,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:35:44,749 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2019-12-07 14:35:44,749 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-12-07 14:35:44,749 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2019-12-07 14:35:44,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-07 14:35:44,750 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:35:44,750 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:35:44,950 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:35:44,951 INFO L410 AbstractCegarLoop]: === Iteration 17 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 14:35:44,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:35:44,952 INFO L82 PathProgramCache]: Analyzing trace with hash -488427557, now seen corresponding path program 5 times [2019-12-07 14:35:44,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:35:44,953 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177243747] [2019-12-07 14:35:44,953 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:35:44,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:35:45,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:35:45,111 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:35:45,111 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177243747] [2019-12-07 14:35:45,111 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791265495] [2019-12-07 14:35:45,112 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0efb28d9-99a5-4ee7-a2ab-02025aae92ca/bin/uautomizer/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 [2019-12-07 14:35:45,173 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-07 14:35:45,173 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 14:35:45,174 INFO L264 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 29 conjunts are in the unsatisfiable core [2019-12-07 14:35:45,176 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:35:45,179 INFO L377 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 [2019-12-07 14:35:45,180 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 14:35:45,183 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 14:35:45,183 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 14:35:45,183 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-12-07 14:35:45,304 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:35:45,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:35:45,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2019-12-07 14:35:45,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829643540] [2019-12-07 14:35:45,305 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-12-07 14:35:45,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:35:45,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-12-07 14:35:45,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2019-12-07 14:35:45,305 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 23 states. [2019-12-07 14:35:45,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:35:45,571 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2019-12-07 14:35:45,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-07 14:35:45,571 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2019-12-07 14:35:45,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:35:45,572 INFO L225 Difference]: With dead ends: 62 [2019-12-07 14:35:45,572 INFO L226 Difference]: Without dead ends: 60 [2019-12-07 14:35:45,572 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2019-12-07 14:35:45,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-12-07 14:35:45,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-12-07 14:35:45,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-12-07 14:35:45,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2019-12-07 14:35:45,574 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 44 [2019-12-07 14:35:45,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:35:45,574 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2019-12-07 14:35:45,574 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-12-07 14:35:45,574 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2019-12-07 14:35:45,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-12-07 14:35:45,575 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:35:45,575 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:35:45,776 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:35:45,777 INFO L410 AbstractCegarLoop]: === Iteration 18 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 14:35:45,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:35:45,777 INFO L82 PathProgramCache]: Analyzing trace with hash 444231919, now seen corresponding path program 6 times [2019-12-07 14:35:45,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:35:45,778 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961820450] [2019-12-07 14:35:45,778 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:35:45,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:35:45,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:35:45,981 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:35:45,981 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961820450] [2019-12-07 14:35:45,981 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174368747] [2019-12-07 14:35:45,981 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0efb28d9-99a5-4ee7-a2ab-02025aae92ca/bin/uautomizer/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 [2019-12-07 14:35:46,044 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-07 14:35:46,044 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 14:35:46,045 INFO L264 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 31 conjunts are in the unsatisfiable core [2019-12-07 14:35:46,047 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:35:46,051 INFO L377 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 [2019-12-07 14:35:46,052 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 14:35:46,055 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 14:35:46,056 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 14:35:46,056 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-12-07 14:35:46,146 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2019-12-07 14:35:46,146 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 14:35:46,150 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 14:35:46,150 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 14:35:46,150 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2019-12-07 14:35:46,345 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 14:35:46,345 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2019-12-07 14:35:46,346 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-12-07 14:35:46,352 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 14:35:46,353 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:35:46,355 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 14:35:46,355 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:32 [2019-12-07 14:35:46,398 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:35:46,473 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:35:46,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:35:46,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2019-12-07 14:35:46,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768648261] [2019-12-07 14:35:46,474 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-12-07 14:35:46,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:35:46,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-12-07 14:35:46,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=856, Unknown=0, NotChecked=0, Total=930 [2019-12-07 14:35:46,475 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 31 states. [2019-12-07 14:35:47,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:35:47,521 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2019-12-07 14:35:47,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-07 14:35:47,522 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 50 [2019-12-07 14:35:47,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:35:47,522 INFO L225 Difference]: With dead ends: 92 [2019-12-07 14:35:47,522 INFO L226 Difference]: Without dead ends: 67 [2019-12-07 14:35:47,523 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=201, Invalid=1869, Unknown=0, NotChecked=0, Total=2070 [2019-12-07 14:35:47,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-12-07 14:35:47,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2019-12-07 14:35:47,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-12-07 14:35:47,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2019-12-07 14:35:47,525 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 50 [2019-12-07 14:35:47,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:35:47,525 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2019-12-07 14:35:47,525 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-12-07 14:35:47,525 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2019-12-07 14:35:47,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-12-07 14:35:47,526 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:35:47,526 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:35:47,726 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:35:47,727 INFO L410 AbstractCegarLoop]: === Iteration 19 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 14:35:47,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:35:47,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1547306290, now seen corresponding path program 7 times [2019-12-07 14:35:47,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:35:47,729 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986088559] [2019-12-07 14:35:47,729 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:35:47,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:35:47,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:35:47,874 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 17 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:35:47,874 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986088559] [2019-12-07 14:35:47,874 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872498785] [2019-12-07 14:35:47,874 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0efb28d9-99a5-4ee7-a2ab-02025aae92ca/bin/uautomizer/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 [2019-12-07 14:35:47,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:35:47,936 INFO L264 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 32 conjunts are in the unsatisfiable core [2019-12-07 14:35:47,938 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:35:48,066 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 15 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:35:48,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:35:48,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 24 [2019-12-07 14:35:48,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008795678] [2019-12-07 14:35:48,067 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-12-07 14:35:48,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:35:48,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-12-07 14:35:48,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2019-12-07 14:35:48,068 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 25 states. [2019-12-07 14:35:48,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:35:48,460 INFO L93 Difference]: Finished difference Result 72 states and 75 transitions. [2019-12-07 14:35:48,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-07 14:35:48,460 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 54 [2019-12-07 14:35:48,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:35:48,461 INFO L225 Difference]: With dead ends: 72 [2019-12-07 14:35:48,461 INFO L226 Difference]: Without dead ends: 70 [2019-12-07 14:35:48,462 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2019-12-07 14:35:48,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-12-07 14:35:48,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2019-12-07 14:35:48,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-12-07 14:35:48,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2019-12-07 14:35:48,465 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 54 [2019-12-07 14:35:48,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:35:48,465 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2019-12-07 14:35:48,465 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-12-07 14:35:48,466 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2019-12-07 14:35:48,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-12-07 14:35:48,467 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:35:48,467 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:35:48,667 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:35:48,668 INFO L410 AbstractCegarLoop]: === Iteration 20 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 14:35:48,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:35:48,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1155246342, now seen corresponding path program 8 times [2019-12-07 14:35:48,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:35:48,669 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964216005] [2019-12-07 14:35:48,670 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:35:48,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:35:48,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:35:48,908 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 17 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:35:48,908 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964216005] [2019-12-07 14:35:48,908 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928040282] [2019-12-07 14:35:48,908 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0efb28d9-99a5-4ee7-a2ab-02025aae92ca/bin/uautomizer/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 [2019-12-07 14:35:48,973 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 14:35:48,973 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 14:35:48,974 INFO L264 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 42 conjunts are in the unsatisfiable core [2019-12-07 14:35:48,976 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:35:49,084 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2019-12-07 14:35:49,084 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 14:35:49,087 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 14:35:49,088 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 14:35:49,088 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2019-12-07 14:35:49,193 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2019-12-07 14:35:49,193 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 14:35:49,195 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 14:35:49,195 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 14:35:49,195 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2019-12-07 14:35:49,201 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 17 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:35:49,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:35:49,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 29 [2019-12-07 14:35:49,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123632502] [2019-12-07 14:35:49,202 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-12-07 14:35:49,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:35:49,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-12-07 14:35:49,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=744, Unknown=0, NotChecked=0, Total=812 [2019-12-07 14:35:49,202 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 29 states. [2019-12-07 14:35:49,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:35:49,829 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2019-12-07 14:35:49,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-07 14:35:49,830 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 60 [2019-12-07 14:35:49,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:35:49,830 INFO L225 Difference]: With dead ends: 108 [2019-12-07 14:35:49,830 INFO L226 Difference]: Without dead ends: 77 [2019-12-07 14:35:49,831 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=157, Invalid=1483, Unknown=0, NotChecked=0, Total=1640 [2019-12-07 14:35:49,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-12-07 14:35:49,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2019-12-07 14:35:49,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-12-07 14:35:49,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2019-12-07 14:35:49,833 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 60 [2019-12-07 14:35:49,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:35:49,833 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2019-12-07 14:35:49,833 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-12-07 14:35:49,833 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2019-12-07 14:35:49,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-12-07 14:35:49,833 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:35:49,834 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:35:50,034 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:35:50,035 INFO L410 AbstractCegarLoop]: === Iteration 21 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 14:35:50,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:35:50,035 INFO L82 PathProgramCache]: Analyzing trace with hash -754121335, now seen corresponding path program 9 times [2019-12-07 14:35:50,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:35:50,036 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031172531] [2019-12-07 14:35:50,036 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:35:50,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:35:50,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:35:50,234 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 30 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:35:50,235 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031172531] [2019-12-07 14:35:50,235 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899821799] [2019-12-07 14:35:50,235 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0efb28d9-99a5-4ee7-a2ab-02025aae92ca/bin/uautomizer/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 [2019-12-07 14:35:50,322 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-12-07 14:35:50,322 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 14:35:50,323 INFO L264 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 35 conjunts are in the unsatisfiable core [2019-12-07 14:35:50,325 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:35:50,329 INFO L377 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 [2019-12-07 14:35:50,330 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 14:35:50,335 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 14:35:50,335 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 14:35:50,335 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-12-07 14:35:50,596 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 28 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:35:50,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:35:50,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 31 [2019-12-07 14:35:50,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617242081] [2019-12-07 14:35:50,597 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-12-07 14:35:50,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:35:50,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-12-07 14:35:50,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2019-12-07 14:35:50,598 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 32 states. [2019-12-07 14:35:51,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:35:51,141 INFO L93 Difference]: Finished difference Result 82 states and 85 transitions. [2019-12-07 14:35:51,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-07 14:35:51,141 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 64 [2019-12-07 14:35:51,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:35:51,142 INFO L225 Difference]: With dead ends: 82 [2019-12-07 14:35:51,142 INFO L226 Difference]: Without dead ends: 80 [2019-12-07 14:35:51,142 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=211, Invalid=1349, Unknown=0, NotChecked=0, Total=1560 [2019-12-07 14:35:51,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-12-07 14:35:51,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2019-12-07 14:35:51,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-12-07 14:35:51,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2019-12-07 14:35:51,144 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 64 [2019-12-07 14:35:51,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:35:51,144 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2019-12-07 14:35:51,144 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-12-07 14:35:51,144 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2019-12-07 14:35:51,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-12-07 14:35:51,145 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:35:51,145 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:35:51,345 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:35:51,346 INFO L410 AbstractCegarLoop]: === Iteration 22 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 14:35:51,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:35:51,346 INFO L82 PathProgramCache]: Analyzing trace with hash 195873821, now seen corresponding path program 10 times [2019-12-07 14:35:51,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:35:51,347 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887499730] [2019-12-07 14:35:51,347 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:35:51,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:35:51,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:35:51,613 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 21 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:35:51,614 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887499730] [2019-12-07 14:35:51,614 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420663128] [2019-12-07 14:35:51,614 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0efb28d9-99a5-4ee7-a2ab-02025aae92ca/bin/uautomizer/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 [2019-12-07 14:35:51,677 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 14:35:51,677 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 14:35:51,678 INFO L264 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 40 conjunts are in the unsatisfiable core [2019-12-07 14:35:51,679 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:35:51,683 INFO L377 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 [2019-12-07 14:35:51,683 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 14:35:51,687 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 14:35:51,687 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 14:35:51,687 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-12-07 14:35:51,835 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-12-07 14:35:51,836 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 14:35:51,838 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 14:35:51,839 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 14:35:51,839 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2019-12-07 14:35:52,104 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2019-12-07 14:35:52,105 INFO L534 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 14:35:52,111 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 14:35:52,113 INFO L172 IndexEqualityManager]: detected equality via solver [2019-12-07 14:35:52,114 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 14:35:52,114 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2019-12-07 14:35:52,115 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 14:35:52,121 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 14:35:52,121 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 14:35:52,121 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:34, output treesize:3 [2019-12-07 14:35:52,134 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 86 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:35:52,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:35:52,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 37 [2019-12-07 14:35:52,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968045466] [2019-12-07 14:35:52,135 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-12-07 14:35:52,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:35:52,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-12-07 14:35:52,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1224, Unknown=0, NotChecked=0, Total=1332 [2019-12-07 14:35:52,136 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 37 states. [2019-12-07 14:35:53,635 WARN L192 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2019-12-07 14:35:55,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:35:55,473 INFO L93 Difference]: Finished difference Result 124 states and 126 transitions. [2019-12-07 14:35:55,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-07 14:35:55,473 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 70 [2019-12-07 14:35:55,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:35:55,474 INFO L225 Difference]: With dead ends: 124 [2019-12-07 14:35:55,474 INFO L226 Difference]: Without dead ends: 87 [2019-12-07 14:35:55,475 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=286, Invalid=2794, Unknown=0, NotChecked=0, Total=3080 [2019-12-07 14:35:55,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-12-07 14:35:55,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 84. [2019-12-07 14:35:55,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-12-07 14:35:55,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2019-12-07 14:35:55,477 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 70 [2019-12-07 14:35:55,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:35:55,477 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2019-12-07 14:35:55,477 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-12-07 14:35:55,477 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2019-12-07 14:35:55,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-12-07 14:35:55,477 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:35:55,477 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:35:55,678 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:35:55,678 INFO L410 AbstractCegarLoop]: === Iteration 23 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 14:35:55,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:35:55,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1310547744, now seen corresponding path program 11 times [2019-12-07 14:35:55,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:35:55,680 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291784996] [2019-12-07 14:35:55,680 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:35:55,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:35:55,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:35:55,890 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 47 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:35:55,891 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291784996] [2019-12-07 14:35:55,891 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367432453] [2019-12-07 14:35:55,891 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0efb28d9-99a5-4ee7-a2ab-02025aae92ca/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:35:55,964 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-12-07 14:35:55,964 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 14:35:55,965 INFO L264 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 43 conjunts are in the unsatisfiable core [2019-12-07 14:35:55,967 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:35:55,970 INFO L377 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 [2019-12-07 14:35:55,970 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 14:35:55,974 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 14:35:55,974 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 14:35:55,974 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-12-07 14:35:56,260 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 45 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:35:56,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:35:56,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 35 [2019-12-07 14:35:56,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995500794] [2019-12-07 14:35:56,261 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-12-07 14:35:56,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:35:56,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-12-07 14:35:56,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2019-12-07 14:35:56,262 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 36 states. [2019-12-07 14:35:57,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:35:57,158 INFO L93 Difference]: Finished difference Result 92 states and 95 transitions. [2019-12-07 14:35:57,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-07 14:35:57,159 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 74 [2019-12-07 14:35:57,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:35:57,161 INFO L225 Difference]: With dead ends: 92 [2019-12-07 14:35:57,161 INFO L226 Difference]: Without dead ends: 90 [2019-12-07 14:35:57,163 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=223, Invalid=1757, Unknown=0, NotChecked=0, Total=1980 [2019-12-07 14:35:57,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-12-07 14:35:57,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2019-12-07 14:35:57,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-12-07 14:35:57,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2019-12-07 14:35:57,167 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 74 [2019-12-07 14:35:57,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:35:57,168 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2019-12-07 14:35:57,168 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-12-07 14:35:57,168 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2019-12-07 14:35:57,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-12-07 14:35:57,169 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:35:57,169 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:35:57,370 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:35:57,370 INFO L410 AbstractCegarLoop]: === Iteration 24 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 14:35:57,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:35:57,371 INFO L82 PathProgramCache]: Analyzing trace with hash 383797812, now seen corresponding path program 12 times [2019-12-07 14:35:57,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:35:57,372 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009113805] [2019-12-07 14:35:57,372 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:35:57,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:35:57,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:35:57,696 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 25 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:35:57,696 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009113805] [2019-12-07 14:35:57,696 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922753844] [2019-12-07 14:35:57,696 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0efb28d9-99a5-4ee7-a2ab-02025aae92ca/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:35:57,785 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2019-12-07 14:35:57,786 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 14:35:57,787 INFO L264 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 45 conjunts are in the unsatisfiable core [2019-12-07 14:35:57,788 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:35:57,791 INFO L377 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 [2019-12-07 14:35:57,791 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 14:35:57,795 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 14:35:57,795 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 14:35:57,795 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-12-07 14:35:57,981 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2019-12-07 14:35:57,981 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 14:35:57,986 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 14:35:57,986 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 14:35:57,986 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2019-12-07 14:35:58,577 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 133 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:35:58,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:35:58,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 43 [2019-12-07 14:35:58,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554782153] [2019-12-07 14:35:58,578 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-12-07 14:35:58,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:35:58,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-12-07 14:35:58,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1659, Unknown=0, NotChecked=0, Total=1806 [2019-12-07 14:35:58,579 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 43 states. [2019-12-07 14:36:00,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:36:00,852 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2019-12-07 14:36:00,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-07 14:36:00,853 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 80 [2019-12-07 14:36:00,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:36:00,853 INFO L225 Difference]: With dead ends: 140 [2019-12-07 14:36:00,853 INFO L226 Difference]: Without dead ends: 97 [2019-12-07 14:36:00,855 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=346, Invalid=3686, Unknown=0, NotChecked=0, Total=4032 [2019-12-07 14:36:00,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-12-07 14:36:00,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 94. [2019-12-07 14:36:00,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-12-07 14:36:00,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2019-12-07 14:36:00,857 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 80 [2019-12-07 14:36:00,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:36:00,858 INFO L462 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2019-12-07 14:36:00,858 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-12-07 14:36:00,858 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2019-12-07 14:36:00,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2019-12-07 14:36:00,858 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:36:00,858 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:36:01,059 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:36:01,059 INFO L410 AbstractCegarLoop]: === Iteration 25 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 14:36:01,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:36:01,060 INFO L82 PathProgramCache]: Analyzing trace with hash 219236151, now seen corresponding path program 13 times [2019-12-07 14:36:01,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:36:01,060 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353219537] [2019-12-07 14:36:01,061 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:36:01,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:36:01,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:36:01,351 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 68 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:36:01,351 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353219537] [2019-12-07 14:36:01,351 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249692510] [2019-12-07 14:36:01,351 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0efb28d9-99a5-4ee7-a2ab-02025aae92ca/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:36:01,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:36:01,418 INFO L264 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 47 conjunts are in the unsatisfiable core [2019-12-07 14:36:01,420 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:36:01,606 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 66 proven. 158 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:36:01,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:36:01,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 33 [2019-12-07 14:36:01,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959927443] [2019-12-07 14:36:01,607 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-12-07 14:36:01,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:36:01,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-12-07 14:36:01,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=971, Unknown=0, NotChecked=0, Total=1122 [2019-12-07 14:36:01,608 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 34 states. [2019-12-07 14:36:02,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:36:02,421 INFO L93 Difference]: Finished difference Result 102 states and 105 transitions. [2019-12-07 14:36:02,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-07 14:36:02,421 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 84 [2019-12-07 14:36:02,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:36:02,422 INFO L225 Difference]: With dead ends: 102 [2019-12-07 14:36:02,422 INFO L226 Difference]: Without dead ends: 100 [2019-12-07 14:36:02,423 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=235, Invalid=1657, Unknown=0, NotChecked=0, Total=1892 [2019-12-07 14:36:02,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-12-07 14:36:02,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2019-12-07 14:36:02,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-12-07 14:36:02,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2019-12-07 14:36:02,424 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 84 [2019-12-07 14:36:02,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:36:02,425 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2019-12-07 14:36:02,425 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-12-07 14:36:02,425 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2019-12-07 14:36:02,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-12-07 14:36:02,425 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:36:02,425 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:36:02,626 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:36:02,626 INFO L410 AbstractCegarLoop]: === Iteration 26 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 14:36:02,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:36:02,627 INFO L82 PathProgramCache]: Analyzing trace with hash 473469771, now seen corresponding path program 14 times [2019-12-07 14:36:02,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:36:02,627 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845043595] [2019-12-07 14:36:02,628 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:36:02,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:36:02,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:36:02,961 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 29 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:36:02,961 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845043595] [2019-12-07 14:36:02,961 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348302425] [2019-12-07 14:36:02,961 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0efb28d9-99a5-4ee7-a2ab-02025aae92ca/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:36:03,033 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 14:36:03,034 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 14:36:03,035 INFO L264 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 61 conjunts are in the unsatisfiable core [2019-12-07 14:36:03,036 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:36:03,039 INFO L377 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 [2019-12-07 14:36:03,040 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 14:36:03,043 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 14:36:03,043 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 14:36:03,043 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-12-07 14:36:03,238 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2019-12-07 14:36:03,238 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 14:36:03,242 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 14:36:03,243 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 14:36:03,243 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2019-12-07 14:36:03,598 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 14:36:03,598 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2019-12-07 14:36:03,598 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-12-07 14:36:03,603 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 14:36:03,603 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 14:36:03,604 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:21 [2019-12-07 14:36:03,644 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:36:03,790 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 66 proven. 201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:36:03,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:36:03,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 47 [2019-12-07 14:36:03,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873000663] [2019-12-07 14:36:03,791 INFO L442 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-12-07 14:36:03,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:36:03,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-12-07 14:36:03,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=2047, Unknown=0, NotChecked=0, Total=2162 [2019-12-07 14:36:03,792 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand 47 states. [2019-12-07 14:36:07,729 WARN L192 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2019-12-07 14:36:08,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:36:08,545 INFO L93 Difference]: Finished difference Result 164 states and 167 transitions. [2019-12-07 14:36:08,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-12-07 14:36:08,545 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 90 [2019-12-07 14:36:08,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:36:08,546 INFO L225 Difference]: With dead ends: 164 [2019-12-07 14:36:08,546 INFO L226 Difference]: Without dead ends: 113 [2019-12-07 14:36:08,548 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=468, Invalid=6842, Unknown=0, NotChecked=0, Total=7310 [2019-12-07 14:36:08,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2019-12-07 14:36:08,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 110. [2019-12-07 14:36:08,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2019-12-07 14:36:08,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2019-12-07 14:36:08,550 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 90 [2019-12-07 14:36:08,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:36:08,550 INFO L462 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2019-12-07 14:36:08,550 INFO L463 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-12-07 14:36:08,550 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2019-12-07 14:36:08,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-12-07 14:36:08,551 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:36:08,551 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:36:08,751 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:36:08,752 INFO L410 AbstractCegarLoop]: === Iteration 27 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 14:36:08,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:36:08,753 INFO L82 PathProgramCache]: Analyzing trace with hash -699918494, now seen corresponding path program 15 times [2019-12-07 14:36:08,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:36:08,753 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754643946] [2019-12-07 14:36:08,753 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:36:08,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:36:09,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:36:09,179 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 33 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:36:09,180 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754643946] [2019-12-07 14:36:09,180 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203303820] [2019-12-07 14:36:09,180 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0efb28d9-99a5-4ee7-a2ab-02025aae92ca/bin/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:36:09,295 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-12-07 14:36:09,295 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 14:36:09,297 INFO L264 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 66 conjunts are in the unsatisfiable core [2019-12-07 14:36:09,299 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:36:09,527 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2019-12-07 14:36:09,527 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 14:36:09,531 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 14:36:09,531 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 14:36:09,531 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2019-12-07 14:36:09,668 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2019-12-07 14:36:09,669 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 14:36:09,670 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 14:36:09,670 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 14:36:09,670 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2019-12-07 14:36:09,685 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 33 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:36:09,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:36:09,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 41 [2019-12-07 14:36:09,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249795445] [2019-12-07 14:36:09,686 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-12-07 14:36:09,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:36:09,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-12-07 14:36:09,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1544, Unknown=0, NotChecked=0, Total=1640 [2019-12-07 14:36:09,687 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 41 states. [2019-12-07 14:36:11,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:36:11,348 INFO L93 Difference]: Finished difference Result 172 states and 174 transitions. [2019-12-07 14:36:11,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-07 14:36:11,348 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 100 [2019-12-07 14:36:11,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:36:11,349 INFO L225 Difference]: With dead ends: 172 [2019-12-07 14:36:11,349 INFO L226 Difference]: Without dead ends: 117 [2019-12-07 14:36:11,350 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=213, Invalid=2979, Unknown=0, NotChecked=0, Total=3192 [2019-12-07 14:36:11,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-12-07 14:36:11,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 114. [2019-12-07 14:36:11,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-12-07 14:36:11,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2019-12-07 14:36:11,352 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 100 [2019-12-07 14:36:11,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:36:11,352 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2019-12-07 14:36:11,352 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-12-07 14:36:11,352 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2019-12-07 14:36:11,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-12-07 14:36:11,353 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:36:11,353 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:36:11,553 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:36:11,553 INFO L410 AbstractCegarLoop]: === Iteration 28 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 14:36:11,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:36:11,554 INFO L82 PathProgramCache]: Analyzing trace with hash 618886373, now seen corresponding path program 16 times [2019-12-07 14:36:11,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:36:11,555 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296548561] [2019-12-07 14:36:11,555 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:36:11,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:36:11,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:36:11,911 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 122 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:36:11,911 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296548561] [2019-12-07 14:36:11,912 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079089086] [2019-12-07 14:36:11,912 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0efb28d9-99a5-4ee7-a2ab-02025aae92ca/bin/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:36:11,989 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 14:36:11,989 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 14:36:11,991 INFO L264 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 66 conjunts are in the unsatisfiable core [2019-12-07 14:36:11,993 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:36:11,996 INFO L377 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 [2019-12-07 14:36:11,997 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 14:36:12,000 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 14:36:12,001 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 14:36:12,001 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-12-07 14:36:12,036 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2019-12-07 14:36:12,037 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 14:36:12,041 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 14:36:12,041 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 14:36:12,042 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2019-12-07 14:36:12,411 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 14:36:12,411 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2019-12-07 14:36:12,411 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-12-07 14:36:12,418 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 14:36:12,418 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 14:36:12,418 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:24 [2019-12-07 14:36:12,473 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:36:12,616 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 128 proven. 250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:36:12,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:36:12,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 27] total 42 [2019-12-07 14:36:12,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964060020] [2019-12-07 14:36:12,617 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-12-07 14:36:12,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:36:12,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-12-07 14:36:12,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1669, Unknown=0, NotChecked=0, Total=1806 [2019-12-07 14:36:12,618 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand 43 states. [2019-12-07 14:36:15,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:36:15,913 INFO L93 Difference]: Finished difference Result 122 states and 125 transitions. [2019-12-07 14:36:15,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-07 14:36:15,914 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 104 [2019-12-07 14:36:15,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:36:15,914 INFO L225 Difference]: With dead ends: 122 [2019-12-07 14:36:15,914 INFO L226 Difference]: Without dead ends: 120 [2019-12-07 14:36:15,915 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=288, Invalid=3018, Unknown=0, NotChecked=0, Total=3306 [2019-12-07 14:36:15,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2019-12-07 14:36:15,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2019-12-07 14:36:15,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2019-12-07 14:36:15,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2019-12-07 14:36:15,917 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 104 [2019-12-07 14:36:15,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:36:15,918 INFO L462 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2019-12-07 14:36:15,918 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-12-07 14:36:15,918 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2019-12-07 14:36:15,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-12-07 14:36:15,918 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:36:15,918 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:36:16,119 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:36:16,119 INFO L410 AbstractCegarLoop]: === Iteration 29 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 14:36:16,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:36:16,120 INFO L82 PathProgramCache]: Analyzing trace with hash -76462471, now seen corresponding path program 17 times [2019-12-07 14:36:16,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:36:16,121 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234223175] [2019-12-07 14:36:16,121 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:36:16,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:36:16,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:36:16,588 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 37 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:36:16,588 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234223175] [2019-12-07 14:36:16,588 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252404666] [2019-12-07 14:36:16,588 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0efb28d9-99a5-4ee7-a2ab-02025aae92ca/bin/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:36:16,695 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2019-12-07 14:36:16,695 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 14:36:16,697 INFO L264 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 72 conjunts are in the unsatisfiable core [2019-12-07 14:36:16,698 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:36:16,961 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2019-12-07 14:36:16,961 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 14:36:16,965 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 14:36:16,965 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 14:36:16,965 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2019-12-07 14:36:17,131 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2019-12-07 14:36:17,131 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 14:36:17,132 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 14:36:17,132 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 14:36:17,132 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2019-12-07 14:36:17,152 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 37 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:36:17,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:36:17,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 44 [2019-12-07 14:36:17,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581163879] [2019-12-07 14:36:17,153 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-12-07 14:36:17,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:36:17,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-12-07 14:36:17,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1789, Unknown=0, NotChecked=0, Total=1892 [2019-12-07 14:36:17,154 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand 44 states. [2019-12-07 14:36:18,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:36:18,761 INFO L93 Difference]: Finished difference Result 188 states and 190 transitions. [2019-12-07 14:36:18,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-07 14:36:18,762 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 110 [2019-12-07 14:36:18,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:36:18,763 INFO L225 Difference]: With dead ends: 188 [2019-12-07 14:36:18,763 INFO L226 Difference]: Without dead ends: 127 [2019-12-07 14:36:18,764 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=227, Invalid=3433, Unknown=0, NotChecked=0, Total=3660 [2019-12-07 14:36:18,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-12-07 14:36:18,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 124. [2019-12-07 14:36:18,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-12-07 14:36:18,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 126 transitions. [2019-12-07 14:36:18,766 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 126 transitions. Word has length 110 [2019-12-07 14:36:18,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:36:18,766 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 126 transitions. [2019-12-07 14:36:18,766 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-12-07 14:36:18,766 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 126 transitions. [2019-12-07 14:36:18,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-12-07 14:36:18,766 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:36:18,766 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:36:18,967 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:36:18,967 INFO L410 AbstractCegarLoop]: === Iteration 30 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 14:36:18,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:36:18,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1245961276, now seen corresponding path program 18 times [2019-12-07 14:36:18,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:36:18,969 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622776107] [2019-12-07 14:36:18,969 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:36:18,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:36:19,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:36:19,323 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 155 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:36:19,323 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622776107] [2019-12-07 14:36:19,324 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757202642] [2019-12-07 14:36:19,324 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0efb28d9-99a5-4ee7-a2ab-02025aae92ca/bin/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:36:19,511 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-12-07 14:36:19,511 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 14:36:19,513 INFO L264 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 55 conjunts are in the unsatisfiable core [2019-12-07 14:36:19,515 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:36:19,518 INFO L377 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 [2019-12-07 14:36:19,518 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 14:36:19,522 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 14:36:19,522 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 14:36:19,522 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-12-07 14:36:20,071 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 153 proven. 317 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:36:20,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:36:20,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25] total 51 [2019-12-07 14:36:20,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867285201] [2019-12-07 14:36:20,072 INFO L442 AbstractCegarLoop]: Interpolant automaton has 52 states [2019-12-07 14:36:20,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:36:20,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2019-12-07 14:36:20,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=2334, Unknown=0, NotChecked=0, Total=2652 [2019-12-07 14:36:20,073 INFO L87 Difference]: Start difference. First operand 124 states and 126 transitions. Second operand 52 states. [2019-12-07 14:36:21,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:36:21,880 INFO L93 Difference]: Finished difference Result 132 states and 135 transitions. [2019-12-07 14:36:21,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-07 14:36:21,881 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 114 [2019-12-07 14:36:21,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:36:21,883 INFO L225 Difference]: With dead ends: 132 [2019-12-07 14:36:21,883 INFO L226 Difference]: Without dead ends: 130 [2019-12-07 14:36:21,885 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=501, Invalid=3659, Unknown=0, NotChecked=0, Total=4160 [2019-12-07 14:36:21,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-12-07 14:36:21,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2019-12-07 14:36:21,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-12-07 14:36:21,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2019-12-07 14:36:21,890 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 114 [2019-12-07 14:36:21,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:36:21,890 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2019-12-07 14:36:21,891 INFO L463 AbstractCegarLoop]: Interpolant automaton has 52 states. [2019-12-07 14:36:21,891 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2019-12-07 14:36:21,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-12-07 14:36:21,892 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:36:21,892 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:36:22,093 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:36:22,093 INFO L410 AbstractCegarLoop]: === Iteration 31 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 14:36:22,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:36:22,094 INFO L82 PathProgramCache]: Analyzing trace with hash 887525520, now seen corresponding path program 19 times [2019-12-07 14:36:22,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:36:22,094 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242294896] [2019-12-07 14:36:22,095 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:36:22,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:36:22,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:36:22,579 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 41 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:36:22,579 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242294896] [2019-12-07 14:36:22,580 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116111835] [2019-12-07 14:36:22,580 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0efb28d9-99a5-4ee7-a2ab-02025aae92ca/bin/uautomizer/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:36:22,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:36:22,658 INFO L264 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 71 conjunts are in the unsatisfiable core [2019-12-07 14:36:22,659 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:36:22,901 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2019-12-07 14:36:22,901 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 14:36:22,905 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 14:36:22,905 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 14:36:22,905 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2019-12-07 14:36:23,715 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 14:36:23,715 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2019-12-07 14:36:23,715 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-12-07 14:36:23,723 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 14:36:23,723 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:36:23,724 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 14:36:23,724 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:31 [2019-12-07 14:36:23,784 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:36:23,987 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 153 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:36:23,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:36:23,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 60 [2019-12-07 14:36:23,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533765496] [2019-12-07 14:36:23,988 INFO L442 AbstractCegarLoop]: Interpolant automaton has 60 states [2019-12-07 14:36:23,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:36:23,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2019-12-07 14:36:23,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=3316, Unknown=0, NotChecked=0, Total=3540 [2019-12-07 14:36:23,989 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand 60 states. [2019-12-07 14:36:27,165 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2019-12-07 14:36:39,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:36:39,651 INFO L93 Difference]: Finished difference Result 212 states and 215 transitions. [2019-12-07 14:36:39,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2019-12-07 14:36:39,652 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 120 [2019-12-07 14:36:39,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:36:39,652 INFO L225 Difference]: With dead ends: 212 [2019-12-07 14:36:39,653 INFO L226 Difference]: Without dead ends: 143 [2019-12-07 14:36:39,653 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1570 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=572, Invalid=9130, Unknown=0, NotChecked=0, Total=9702 [2019-12-07 14:36:39,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-12-07 14:36:39,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 140. [2019-12-07 14:36:39,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-12-07 14:36:39,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 142 transitions. [2019-12-07 14:36:39,656 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 142 transitions. Word has length 120 [2019-12-07 14:36:39,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:36:39,656 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 142 transitions. [2019-12-07 14:36:39,656 INFO L463 AbstractCegarLoop]: Interpolant automaton has 60 states. [2019-12-07 14:36:39,656 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 142 transitions. [2019-12-07 14:36:39,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-12-07 14:36:39,656 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:36:39,656 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:36:39,857 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:36:39,857 INFO L410 AbstractCegarLoop]: === Iteration 32 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 14:36:39,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:36:39,858 INFO L82 PathProgramCache]: Analyzing trace with hash 363488679, now seen corresponding path program 20 times [2019-12-07 14:36:39,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:36:39,859 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233351928] [2019-12-07 14:36:39,859 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:36:39,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:36:40,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:36:40,419 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 45 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:36:40,419 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233351928] [2019-12-07 14:36:40,419 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683860289] [2019-12-07 14:36:40,419 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0efb28d9-99a5-4ee7-a2ab-02025aae92ca/bin/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:36:40,501 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 14:36:40,501 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 14:36:40,503 INFO L264 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 79 conjunts are in the unsatisfiable core [2019-12-07 14:36:40,505 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:36:40,822 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2019-12-07 14:36:40,822 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 14:36:40,827 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 14:36:40,827 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 14:36:40,827 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:24 [2019-12-07 14:36:41,621 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 14:36:41,621 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2019-12-07 14:36:41,621 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-12-07 14:36:41,627 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 14:36:41,628 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:36:41,628 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 14:36:41,628 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:31 [2019-12-07 14:36:41,691 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:36:41,899 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 190 proven. 449 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:36:41,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:36:41,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 31] total 63 [2019-12-07 14:36:41,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568776894] [2019-12-07 14:36:41,900 INFO L442 AbstractCegarLoop]: Interpolant automaton has 63 states [2019-12-07 14:36:41,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:36:41,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2019-12-07 14:36:41,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=3656, Unknown=0, NotChecked=0, Total=3906 [2019-12-07 14:36:41,900 INFO L87 Difference]: Start difference. First operand 140 states and 142 transitions. Second operand 63 states. [2019-12-07 14:36:45,916 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2019-12-07 14:37:09,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:37:09,950 INFO L93 Difference]: Finished difference Result 228 states and 231 transitions. [2019-12-07 14:37:09,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-12-07 14:37:09,950 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 130 [2019-12-07 14:37:09,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:37:09,951 INFO L225 Difference]: With dead ends: 228 [2019-12-07 14:37:09,951 INFO L226 Difference]: Without dead ends: 153 [2019-12-07 14:37:09,952 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1637 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=642, Invalid=9864, Unknown=0, NotChecked=0, Total=10506 [2019-12-07 14:37:09,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-12-07 14:37:09,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 150. [2019-12-07 14:37:09,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-12-07 14:37:09,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 152 transitions. [2019-12-07 14:37:09,954 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 152 transitions. Word has length 130 [2019-12-07 14:37:09,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:37:09,954 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 152 transitions. [2019-12-07 14:37:09,954 INFO L463 AbstractCegarLoop]: Interpolant automaton has 63 states. [2019-12-07 14:37:09,955 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 152 transitions. [2019-12-07 14:37:09,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-12-07 14:37:09,955 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:37:09,955 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:37:10,155 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:37:10,156 INFO L410 AbstractCegarLoop]: === Iteration 33 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 14:37:10,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:37:10,157 INFO L82 PathProgramCache]: Analyzing trace with hash 294598078, now seen corresponding path program 21 times [2019-12-07 14:37:10,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:37:10,157 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741915754] [2019-12-07 14:37:10,157 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:37:10,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:37:10,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:37:10,768 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 49 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:37:10,768 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741915754] [2019-12-07 14:37:10,768 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251661362] [2019-12-07 14:37:10,768 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0efb28d9-99a5-4ee7-a2ab-02025aae92ca/bin/uautomizer/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:37:10,984 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2019-12-07 14:37:10,984 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 14:37:10,987 INFO L264 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 92 conjunts are in the unsatisfiable core [2019-12-07 14:37:10,989 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:37:11,403 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2019-12-07 14:37:11,403 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 14:37:11,407 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 14:37:11,407 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 14:37:11,407 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2019-12-07 14:37:11,706 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 49 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:37:11,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:37:11,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 55 [2019-12-07 14:37:11,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410622862] [2019-12-07 14:37:11,706 INFO L442 AbstractCegarLoop]: Interpolant automaton has 55 states [2019-12-07 14:37:11,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:37:11,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2019-12-07 14:37:11,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=2838, Unknown=0, NotChecked=0, Total=2970 [2019-12-07 14:37:11,707 INFO L87 Difference]: Start difference. First operand 150 states and 152 transitions. Second operand 55 states. [2019-12-07 14:37:16,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:37:16,256 INFO L93 Difference]: Finished difference Result 236 states and 238 transitions. [2019-12-07 14:37:16,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-07 14:37:16,256 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 140 [2019-12-07 14:37:16,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:37:16,257 INFO L225 Difference]: With dead ends: 236 [2019-12-07 14:37:16,257 INFO L226 Difference]: Without dead ends: 157 [2019-12-07 14:37:16,258 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 121 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=280, Invalid=5270, Unknown=0, NotChecked=0, Total=5550 [2019-12-07 14:37:16,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-12-07 14:37:16,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 154. [2019-12-07 14:37:16,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-12-07 14:37:16,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 156 transitions. [2019-12-07 14:37:16,260 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 156 transitions. Word has length 140 [2019-12-07 14:37:16,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:37:16,261 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 156 transitions. [2019-12-07 14:37:16,261 INFO L463 AbstractCegarLoop]: Interpolant automaton has 55 states. [2019-12-07 14:37:16,261 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 156 transitions. [2019-12-07 14:37:16,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-12-07 14:37:16,262 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:37:16,262 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:37:16,462 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:37:16,462 INFO L410 AbstractCegarLoop]: === Iteration 34 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 14:37:16,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:37:16,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1900047295, now seen corresponding path program 22 times [2019-12-07 14:37:16,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:37:16,463 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422051621] [2019-12-07 14:37:16,463 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:37:16,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:37:16,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:37:17,012 INFO L134 CoverageAnalysis]: Checked inductivity of 806 backedges. 278 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:37:17,012 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422051621] [2019-12-07 14:37:17,012 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842116667] [2019-12-07 14:37:17,012 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0efb28d9-99a5-4ee7-a2ab-02025aae92ca/bin/uautomizer/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:37:17,096 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 14:37:17,096 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 14:37:17,098 INFO L264 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 86 conjunts are in the unsatisfiable core [2019-12-07 14:37:17,100 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:37:17,102 INFO L377 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 [2019-12-07 14:37:17,103 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 14:37:17,106 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 14:37:17,106 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 14:37:17,106 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-12-07 14:37:17,141 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2019-12-07 14:37:17,141 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 14:37:17,145 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 14:37:17,145 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 14:37:17,145 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2019-12-07 14:37:17,803 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 14:37:17,803 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2019-12-07 14:37:17,803 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-12-07 14:37:17,810 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 14:37:17,810 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 14:37:17,811 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:24 [2019-12-07 14:37:17,859 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:37:18,074 INFO L134 CoverageAnalysis]: Checked inductivity of 806 backedges. 288 proven. 518 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:37:18,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:37:18,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 35] total 54 [2019-12-07 14:37:18,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153609547] [2019-12-07 14:37:18,074 INFO L442 AbstractCegarLoop]: Interpolant automaton has 55 states [2019-12-07 14:37:18,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:37:18,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2019-12-07 14:37:18,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=2763, Unknown=0, NotChecked=0, Total=2970 [2019-12-07 14:37:18,075 INFO L87 Difference]: Start difference. First operand 154 states and 156 transitions. Second operand 55 states. [2019-12-07 14:37:21,931 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2019-12-07 14:37:24,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:37:24,246 INFO L93 Difference]: Finished difference Result 162 states and 165 transitions. [2019-12-07 14:37:24,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-07 14:37:24,247 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 144 [2019-12-07 14:37:24,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:37:24,248 INFO L225 Difference]: With dead ends: 162 [2019-12-07 14:37:24,248 INFO L226 Difference]: Without dead ends: 160 [2019-12-07 14:37:24,248 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1077 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=406, Invalid=4996, Unknown=0, NotChecked=0, Total=5402 [2019-12-07 14:37:24,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2019-12-07 14:37:24,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2019-12-07 14:37:24,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2019-12-07 14:37:24,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 162 transitions. [2019-12-07 14:37:24,252 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 162 transitions. Word has length 144 [2019-12-07 14:37:24,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:37:24,252 INFO L462 AbstractCegarLoop]: Abstraction has 160 states and 162 transitions. [2019-12-07 14:37:24,252 INFO L463 AbstractCegarLoop]: Interpolant automaton has 55 states. [2019-12-07 14:37:24,252 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 162 transitions. [2019-12-07 14:37:24,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-12-07 14:37:24,253 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:37:24,253 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:37:24,454 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:37:24,454 INFO L410 AbstractCegarLoop]: === Iteration 35 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 14:37:24,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:37:24,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1949790421, now seen corresponding path program 23 times [2019-12-07 14:37:24,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:37:24,455 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075968468] [2019-12-07 14:37:24,456 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:37:24,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:37:25,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:37:25,135 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 53 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:37:25,135 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075968468] [2019-12-07 14:37:25,136 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12680191] [2019-12-07 14:37:25,136 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0efb28d9-99a5-4ee7-a2ab-02025aae92ca/bin/uautomizer/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:37:25,280 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2019-12-07 14:37:25,280 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 14:37:25,283 INFO L264 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 93 conjunts are in the unsatisfiable core [2019-12-07 14:37:25,285 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:37:25,288 INFO L377 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 [2019-12-07 14:37:25,288 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 14:37:25,294 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 14:37:25,295 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 14:37:25,295 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-12-07 14:37:25,885 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2019-12-07 14:37:25,885 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 14:37:25,889 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 14:37:25,890 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 14:37:25,890 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:24 [2019-12-07 14:37:28,552 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 14:37:28,553 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2019-12-07 14:37:28,554 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:37:28,555 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 14:37:28,578 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 14:37:28,578 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 14:37:28,579 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:21 [2019-12-07 14:37:29,180 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 231 proven. 654 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:37:29,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:37:29,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 73 [2019-12-07 14:37:29,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463763068] [2019-12-07 14:37:29,180 INFO L442 AbstractCegarLoop]: Interpolant automaton has 73 states [2019-12-07 14:37:29,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:37:29,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2019-12-07 14:37:29,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=5040, Unknown=0, NotChecked=0, Total=5256 [2019-12-07 14:37:29,181 INFO L87 Difference]: Start difference. First operand 160 states and 162 transitions. Second operand 73 states. [2019-12-07 14:37:33,625 WARN L192 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2019-12-07 14:37:35,501 WARN L192 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2019-12-07 14:37:37,128 WARN L192 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2019-12-07 14:37:41,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:37:41,745 INFO L93 Difference]: Finished difference Result 260 states and 263 transitions. [2019-12-07 14:37:41,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2019-12-07 14:37:41,745 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 150 [2019-12-07 14:37:41,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:37:41,746 INFO L225 Difference]: With dead ends: 260 [2019-12-07 14:37:41,746 INFO L226 Difference]: Without dead ends: 173 [2019-12-07 14:37:41,747 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2575 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=773, Invalid=15997, Unknown=0, NotChecked=0, Total=16770 [2019-12-07 14:37:41,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2019-12-07 14:37:41,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 170. [2019-12-07 14:37:41,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2019-12-07 14:37:41,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 172 transitions. [2019-12-07 14:37:41,749 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 172 transitions. Word has length 150 [2019-12-07 14:37:41,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:37:41,749 INFO L462 AbstractCegarLoop]: Abstraction has 170 states and 172 transitions. [2019-12-07 14:37:41,749 INFO L463 AbstractCegarLoop]: Interpolant automaton has 73 states. [2019-12-07 14:37:41,749 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 172 transitions. [2019-12-07 14:37:41,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-12-07 14:37:41,750 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:37:41,750 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:37:41,950 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:37:41,950 INFO L410 AbstractCegarLoop]: === Iteration 36 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-12-07 14:37:41,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:37:41,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1477805804, now seen corresponding path program 24 times [2019-12-07 14:37:41,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:37:41,951 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666810729] [2019-12-07 14:37:41,951 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:37:41,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:37:42,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:37:42,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 57 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:37:42,688 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666810729] [2019-12-07 14:37:42,688 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557721878] [2019-12-07 14:37:42,688 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0efb28d9-99a5-4ee7-a2ab-02025aae92ca/bin/uautomizer/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:37:42,996 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2019-12-07 14:37:42,996 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 14:37:42,998 INFO L264 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 54 conjunts are in the unsatisfiable core [2019-12-07 14:37:43,000 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:37:43,003 INFO L377 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 [2019-12-07 14:37:43,003 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 14:37:43,007 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 14:37:43,008 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-12-07 14:37:43,008 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-12-07 14:37:43,044 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2019-12-07 14:37:43,045 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 14:37:43,048 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 14:37:43,048 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-12-07 14:37:43,049 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:19 [2019-12-07 14:37:43,408 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 14:37:43,409 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2019-12-07 14:37:43,409 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:37:43,409 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 14:37:43,414 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 14:37:43,415 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 14:37:43,415 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:24 [2019-12-07 14:37:43,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 42 proven. 43 refuted. 0 times theorem prover too weak. 938 trivial. 0 not checked. [2019-12-07 14:37:43,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:37:43,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 10] total 48 [2019-12-07 14:37:43,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402814199] [2019-12-07 14:37:43,579 INFO L442 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-12-07 14:37:43,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:37:43,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-12-07 14:37:43,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2159, Unknown=0, NotChecked=0, Total=2256 [2019-12-07 14:37:43,579 INFO L87 Difference]: Start difference. First operand 170 states and 172 transitions. Second operand 48 states. [2019-12-07 14:37:46,502 WARN L192 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2019-12-07 14:37:46,937 WARN L192 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2019-12-07 14:37:47,540 WARN L192 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2019-12-07 14:37:48,340 WARN L192 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2019-12-07 14:37:48,983 WARN L192 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2019-12-07 14:37:49,807 WARN L192 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2019-12-07 14:37:50,852 WARN L192 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2019-12-07 14:37:51,384 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2019-12-07 14:37:51,811 WARN L192 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2019-12-07 14:37:52,149 WARN L192 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2019-12-07 14:37:52,761 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2019-12-07 14:37:59,108 WARN L192 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2019-12-07 14:37:59,609 WARN L192 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2019-12-07 14:38:00,726 WARN L192 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2019-12-07 14:38:01,165 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2019-12-07 14:38:01,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:38:01,827 INFO L93 Difference]: Finished difference Result 266 states and 267 transitions. [2019-12-07 14:38:01,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2019-12-07 14:38:01,828 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 160 [2019-12-07 14:38:01,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:38:01,828 INFO L225 Difference]: With dead ends: 266 [2019-12-07 14:38:01,828 INFO L226 Difference]: Without dead ends: 0 [2019-12-07 14:38:01,829 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 153 SyntacticMatches, 1 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5430 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=1822, Invalid=22670, Unknown=0, NotChecked=0, Total=24492 [2019-12-07 14:38:01,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-07 14:38:01,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-07 14:38:01,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-07 14:38:01,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-07 14:38:01,830 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 160 [2019-12-07 14:38:01,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:38:01,830 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 14:38:01,830 INFO L463 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-12-07 14:38:01,830 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-07 14:38:01,830 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-07 14:38:02,031 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:38:02,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 02:38:02 BoogieIcfgContainer [2019-12-07 14:38:02,036 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 14:38:02,036 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 14:38:02,036 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 14:38:02,036 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 14:38:02,037 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 02:35:38" (3/4) ... [2019-12-07 14:38:02,039 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-12-07 14:38:02,043 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure cstrchr [2019-12-07 14:38:02,043 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2019-12-07 14:38:02,043 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2019-12-07 14:38:02,043 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2019-12-07 14:38:02,043 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint16_identity [2019-12-07 14:38:02,043 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint64_identity [2019-12-07 14:38:02,043 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2019-12-07 14:38:02,043 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint32_identity [2019-12-07 14:38:02,046 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2019-12-07 14:38:02,046 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2019-12-07 14:38:02,046 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2019-12-07 14:38:02,046 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2019-12-07 14:38:02,073 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_0efb28d9-99a5-4ee7-a2ab-02025aae92ca/bin/uautomizer/witness.graphml [2019-12-07 14:38:02,073 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 14:38:02,074 INFO L168 Benchmark]: Toolchain (without parser) took 144018.47 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 212.3 MB). Free memory was 939.9 MB in the beginning and 975.2 MB in the end (delta: -35.4 MB). Peak memory consumption was 177.0 MB. Max. memory is 11.5 GB. [2019-12-07 14:38:02,074 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 961.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 14:38:02,074 INFO L168 Benchmark]: CACSL2BoogieTranslator took 304.70 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 94.9 MB). Free memory was 939.9 MB in the beginning and 1.1 GB in the end (delta: -138.9 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. [2019-12-07 14:38:02,074 INFO L168 Benchmark]: Boogie Preprocessor took 35.26 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-12-07 14:38:02,074 INFO L168 Benchmark]: RCFGBuilder took 291.60 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 45.0 MB). Peak memory consumption was 45.0 MB. Max. memory is 11.5 GB. [2019-12-07 14:38:02,075 INFO L168 Benchmark]: TraceAbstraction took 143347.12 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 117.4 MB). Free memory was 1.0 GB in the beginning and 986.4 MB in the end (delta: 42.0 MB). Peak memory consumption was 159.5 MB. Max. memory is 11.5 GB. [2019-12-07 14:38:02,075 INFO L168 Benchmark]: Witness Printer took 36.71 ms. Allocated memory is still 1.2 GB. Free memory was 986.4 MB in the beginning and 975.2 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 11.5 GB. [2019-12-07 14:38:02,076 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 961.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 304.70 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 94.9 MB). Free memory was 939.9 MB in the beginning and 1.1 GB in the end (delta: -138.9 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 35.26 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 291.60 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 45.0 MB). Peak memory consumption was 45.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 143347.12 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 117.4 MB). Free memory was 1.0 GB in the beginning and 986.4 MB in the end (delta: 42.0 MB). Peak memory consumption was 159.5 MB. Max. memory is 11.5 GB. * Witness Printer took 36.71 ms. Allocated memory is still 1.2 GB. Free memory was 986.4 MB in the beginning and 975.2 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 516]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 516]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 516]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 516]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 532]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 532]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 520]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 529]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 529]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 11 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 58 locations, 11 error locations. Result: SAFE, OverallTime: 143.3s, OverallIterations: 36, TraceHistogramMax: 15, AutomataDifference: 111.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 1271 SDtfs, 5135 SDslu, 8860 SDs, 0 SdLazy, 59265 SolverSat, 922 SolverUnsat, 30 SolverUnknown, 0 SolverNotchecked, 63.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3282 GetRequests, 1751 SyntacticMatches, 26 SemanticMatches, 1505 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19628 ImplicationChecksByTransitivity, 60.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=170occurred in iteration=35, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 36 MinimizatonAttempts, 89 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.7s SatisfiabilityAnalysisTime, 22.9s InterpolantComputationTime, 4328 NumberOfCodeBlocks, 4260 NumberOfCodeBlocksAsserted, 163 NumberOfCheckSat, 4267 ConstructedInterpolants, 332 QuantifiedInterpolants, 5053526 SizeOfPredicates, 200 NumberOfNonLiveVariables, 6995 ConjunctsInSsa, 1244 ConjunctsInUnsatCore, 61 InterpolantComputations, 11 PerfectInterpolantSequences, 3926/15355 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...