./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/lockfree-3.1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/lockfree-3.1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY --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 f3bd5e04188199017a119b2ef3a434e2cfadf1e2e5bbf4182b28eb1a822c186f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 08:38:16,068 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 08:38:16,071 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 08:38:16,137 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 08:38:16,138 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 08:38:16,143 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 08:38:16,146 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 08:38:16,151 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 08:38:16,155 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 08:38:16,162 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 08:38:16,164 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 08:38:16,166 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 08:38:16,167 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 08:38:16,170 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 08:38:16,174 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 08:38:16,180 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 08:38:16,181 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 08:38:16,182 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 08:38:16,185 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 08:38:16,188 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 08:38:16,191 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 08:38:16,195 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 08:38:16,197 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 08:38:16,198 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 08:38:16,202 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 08:38:16,203 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 08:38:16,203 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 08:38:16,204 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 08:38:16,205 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 08:38:16,206 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 08:38:16,207 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 08:38:16,208 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 08:38:16,209 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 08:38:16,210 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 08:38:16,212 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 08:38:16,212 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 08:38:16,213 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 08:38:16,213 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 08:38:16,213 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 08:38:16,214 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 08:38:16,215 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 08:38:16,216 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-07 08:38:16,245 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 08:38:16,245 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 08:38:16,245 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 08:38:16,246 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 08:38:16,247 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 08:38:16,247 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 08:38:16,248 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 08:38:16,248 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 08:38:16,248 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 08:38:16,249 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 08:38:16,249 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 08:38:16,249 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 08:38:16,249 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 08:38:16,250 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 08:38:16,250 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 08:38:16,250 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-07 08:38:16,251 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 08:38:16,251 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 08:38:16,251 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 08:38:16,251 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 08:38:16,252 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 08:38:16,252 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 08:38:16,252 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 08:38:16,253 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:38:16,253 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 08:38:16,253 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 08:38:16,253 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 08:38:16,254 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 08:38:16,254 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 08:38:16,254 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f3bd5e04188199017a119b2ef3a434e2cfadf1e2e5bbf4182b28eb1a822c186f [2021-11-07 08:38:16,578 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 08:38:16,612 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 08:38:16,615 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 08:38:16,617 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 08:38:16,618 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 08:38:16,619 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/memsafety/lockfree-3.1.i [2021-11-07 08:38:16,708 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/data/191c0e81d/187eeedac30c4fb79a4b238435349785/FLAG268e1c13b [2021-11-07 08:38:17,462 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 08:38:17,463 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/sv-benchmarks/c/memsafety/lockfree-3.1.i [2021-11-07 08:38:17,480 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/data/191c0e81d/187eeedac30c4fb79a4b238435349785/FLAG268e1c13b [2021-11-07 08:38:17,691 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/data/191c0e81d/187eeedac30c4fb79a4b238435349785 [2021-11-07 08:38:17,695 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 08:38:17,697 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-07 08:38:17,705 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 08:38:17,705 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 08:38:17,709 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 08:38:17,710 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:38:17" (1/1) ... [2021-11-07 08:38:17,711 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f433ab8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:38:17, skipping insertion in model container [2021-11-07 08:38:17,711 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:38:17" (1/1) ... [2021-11-07 08:38:17,718 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 08:38:17,770 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 08:38:18,287 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:38:18,306 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 08:38:18,386 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:38:18,432 INFO L208 MainTranslator]: Completed translation [2021-11-07 08:38:18,432 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:38:18 WrapperNode [2021-11-07 08:38:18,433 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 08:38:18,434 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 08:38:18,434 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 08:38:18,434 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 08:38:18,449 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:38:18" (1/1) ... [2021-11-07 08:38:18,451 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:38:18" (1/1) ... [2021-11-07 08:38:18,491 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:38:18" (1/1) ... [2021-11-07 08:38:18,499 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:38:18" (1/1) ... [2021-11-07 08:38:18,523 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:38:18" (1/1) ... [2021-11-07 08:38:18,529 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:38:18" (1/1) ... [2021-11-07 08:38:18,544 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:38:18" (1/1) ... [2021-11-07 08:38:18,553 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 08:38:18,559 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 08:38:18,559 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 08:38:18,559 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 08:38:18,576 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:38:18" (1/1) ... [2021-11-07 08:38:18,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:38:18,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:38:18,616 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 08:38:18,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 08:38:18,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-07 08:38:18,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 08:38:18,684 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-07 08:38:18,684 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-07 08:38:18,684 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-07 08:38:18,684 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-11-07 08:38:18,685 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-11-07 08:38:18,685 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-11-07 08:38:18,685 INFO L138 BoogieDeclarations]: Found implementation of procedure push [2021-11-07 08:38:18,685 INFO L138 BoogieDeclarations]: Found implementation of procedure pop [2021-11-07 08:38:18,685 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-07 08:38:18,686 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-07 08:38:18,686 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-07 08:38:18,686 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-07 08:38:18,687 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-07 08:38:18,687 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-07 08:38:18,687 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 08:38:18,687 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-07 08:38:18,688 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-07 08:38:18,688 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-07 08:38:18,688 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-07 08:38:18,688 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-07 08:38:18,689 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-07 08:38:18,689 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-07 08:38:18,689 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-07 08:38:18,689 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-07 08:38:18,689 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-07 08:38:18,690 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-07 08:38:18,690 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-07 08:38:18,690 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-07 08:38:18,690 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-07 08:38:18,691 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-07 08:38:18,691 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-07 08:38:18,691 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-07 08:38:18,691 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-07 08:38:18,691 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-11-07 08:38:18,692 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-11-07 08:38:18,692 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-11-07 08:38:18,692 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-07 08:38:18,692 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-07 08:38:18,693 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-07 08:38:18,693 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-07 08:38:18,693 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-07 08:38:18,693 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-07 08:38:18,694 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-07 08:38:18,694 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-07 08:38:18,694 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-07 08:38:18,694 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-07 08:38:18,695 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-07 08:38:18,695 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-07 08:38:18,695 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-07 08:38:18,695 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-07 08:38:18,696 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-07 08:38:18,696 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-07 08:38:18,696 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-07 08:38:18,696 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-07 08:38:18,696 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-07 08:38:18,697 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-07 08:38:18,697 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-07 08:38:18,697 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-07 08:38:18,697 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-07 08:38:18,698 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-07 08:38:18,698 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-07 08:38:18,698 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-07 08:38:18,698 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-07 08:38:18,699 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-07 08:38:18,699 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-07 08:38:18,699 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-07 08:38:18,699 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-07 08:38:18,699 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-07 08:38:18,700 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-07 08:38:18,700 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-07 08:38:18,700 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-07 08:38:18,700 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-07 08:38:18,701 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-07 08:38:18,701 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-07 08:38:18,701 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-07 08:38:18,701 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-07 08:38:18,702 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-07 08:38:18,702 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-07 08:38:18,702 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-07 08:38:18,702 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-07 08:38:18,702 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-07 08:38:18,703 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-07 08:38:18,703 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-07 08:38:18,703 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-07 08:38:18,703 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-07 08:38:18,704 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-07 08:38:18,704 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-07 08:38:18,704 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-07 08:38:18,704 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-07 08:38:18,705 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-07 08:38:18,705 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-07 08:38:18,705 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-07 08:38:18,705 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-07 08:38:18,705 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-07 08:38:18,706 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-07 08:38:18,706 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-07 08:38:18,706 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-07 08:38:18,707 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-07 08:38:18,707 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-07 08:38:18,707 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-07 08:38:18,707 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-07 08:38:18,708 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-07 08:38:18,708 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-07 08:38:18,708 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-07 08:38:18,708 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-07 08:38:18,709 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-07 08:38:18,709 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-07 08:38:18,709 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-07 08:38:18,709 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-07 08:38:18,710 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-07 08:38:18,710 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-07 08:38:18,710 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-07 08:38:18,710 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-07 08:38:18,711 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-07 08:38:18,711 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-07 08:38:18,711 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-07 08:38:18,711 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-07 08:38:18,712 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-07 08:38:18,712 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-07 08:38:18,712 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-07 08:38:18,712 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-07 08:38:18,713 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-11-07 08:38:18,713 INFO L130 BoogieDeclarations]: Found specification of procedure push [2021-11-07 08:38:18,713 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 08:38:18,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-07 08:38:18,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 08:38:18,714 INFO L130 BoogieDeclarations]: Found specification of procedure pop [2021-11-07 08:38:18,714 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 08:38:18,715 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-07 08:38:18,715 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-07 08:38:18,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 08:38:18,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-07 08:38:18,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 08:38:18,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 08:38:19,441 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 08:38:19,441 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-07 08:38:19,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:38:19 BoogieIcfgContainer [2021-11-07 08:38:19,444 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 08:38:19,446 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 08:38:19,447 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 08:38:19,451 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 08:38:19,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:38:17" (1/3) ... [2021-11-07 08:38:19,452 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73117be8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:38:19, skipping insertion in model container [2021-11-07 08:38:19,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:38:18" (2/3) ... [2021-11-07 08:38:19,453 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73117be8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:38:19, skipping insertion in model container [2021-11-07 08:38:19,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:38:19" (3/3) ... [2021-11-07 08:38:19,455 INFO L111 eAbstractionObserver]: Analyzing ICFG lockfree-3.1.i [2021-11-07 08:38:19,462 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 08:38:19,462 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2021-11-07 08:38:19,525 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 08:38:19,534 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 08:38:19,535 INFO L340 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2021-11-07 08:38:19,559 INFO L276 IsEmpty]: Start isEmpty. Operand has 74 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 67 states have internal predecessors, (85), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-07 08:38:19,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 08:38:19,569 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:38:19,570 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:38:19,571 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:38:19,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:38:19,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1846299228, now seen corresponding path program 1 times [2021-11-07 08:38:19,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:38:19,591 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294249429] [2021-11-07 08:38:19,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:19,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:38:19,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:19,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:38:19,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:20,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:38:20,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:38:20,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294249429] [2021-11-07 08:38:20,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294249429] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:38:20,040 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:38:20,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:38:20,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158990302] [2021-11-07 08:38:20,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:38:20,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:38:20,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:38:20,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:38:20,075 INFO L87 Difference]: Start difference. First operand has 74 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 67 states have internal predecessors, (85), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:38:20,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:38:20,421 INFO L93 Difference]: Finished difference Result 92 states and 115 transitions. [2021-11-07 08:38:20,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:38:20,423 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2021-11-07 08:38:20,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:38:20,441 INFO L225 Difference]: With dead ends: 92 [2021-11-07 08:38:20,441 INFO L226 Difference]: Without dead ends: 89 [2021-11-07 08:38:20,444 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:38:20,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-07 08:38:20,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 71. [2021-11-07 08:38:20,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 44 states have (on average 1.8409090909090908) internal successors, (81), 65 states have internal predecessors, (81), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 08:38:20,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2021-11-07 08:38:20,523 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 8 [2021-11-07 08:38:20,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:38:20,524 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2021-11-07 08:38:20,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:38:20,526 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2021-11-07 08:38:20,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-07 08:38:20,527 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:38:20,528 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:38:20,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 08:38:20,529 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:38:20,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:38:20,530 INFO L85 PathProgramCache]: Analyzing trace with hash 451849005, now seen corresponding path program 1 times [2021-11-07 08:38:20,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:38:20,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970238337] [2021-11-07 08:38:20,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:20,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:38:20,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:20,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:38:20,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:20,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:38:20,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:38:20,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970238337] [2021-11-07 08:38:20,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970238337] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:38:20,798 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:38:20,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:38:20,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965407128] [2021-11-07 08:38:20,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:38:20,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:38:20,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:38:20,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:38:20,805 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:38:21,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:38:21,163 INFO L93 Difference]: Finished difference Result 91 states and 114 transitions. [2021-11-07 08:38:21,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:38:21,164 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-11-07 08:38:21,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:38:21,171 INFO L225 Difference]: With dead ends: 91 [2021-11-07 08:38:21,171 INFO L226 Difference]: Without dead ends: 91 [2021-11-07 08:38:21,172 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:38:21,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-07 08:38:21,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 72. [2021-11-07 08:38:21,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 45 states have (on average 1.8222222222222222) internal successors, (82), 66 states have internal predecessors, (82), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 08:38:21,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 89 transitions. [2021-11-07 08:38:21,202 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 89 transitions. Word has length 10 [2021-11-07 08:38:21,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:38:21,203 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 89 transitions. [2021-11-07 08:38:21,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:38:21,203 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 89 transitions. [2021-11-07 08:38:21,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-07 08:38:21,205 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:38:21,205 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:38:21,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 08:38:21,206 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:38:21,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:38:21,207 INFO L85 PathProgramCache]: Analyzing trace with hash 451908587, now seen corresponding path program 1 times [2021-11-07 08:38:21,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:38:21,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530446843] [2021-11-07 08:38:21,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:21,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:38:21,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:21,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:38:21,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:21,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:38:21,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:38:21,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530446843] [2021-11-07 08:38:21,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530446843] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:38:21,476 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:38:21,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:38:21,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041807187] [2021-11-07 08:38:21,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:38:21,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:38:21,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:38:21,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:38:21,482 INFO L87 Difference]: Start difference. First operand 72 states and 89 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:38:21,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:38:21,888 INFO L93 Difference]: Finished difference Result 135 states and 176 transitions. [2021-11-07 08:38:21,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:38:21,889 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-11-07 08:38:21,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:38:21,896 INFO L225 Difference]: With dead ends: 135 [2021-11-07 08:38:21,896 INFO L226 Difference]: Without dead ends: 135 [2021-11-07 08:38:21,897 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:38:21,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-11-07 08:38:21,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 108. [2021-11-07 08:38:21,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 77 states have (on average 1.8311688311688312) internal successors, (141), 99 states have internal predecessors, (141), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-07 08:38:21,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 153 transitions. [2021-11-07 08:38:21,916 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 153 transitions. Word has length 10 [2021-11-07 08:38:21,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:38:21,917 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 153 transitions. [2021-11-07 08:38:21,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:38:21,917 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 153 transitions. [2021-11-07 08:38:21,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-07 08:38:21,918 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:38:21,918 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:38:21,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 08:38:21,919 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:38:21,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:38:21,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1124262917, now seen corresponding path program 1 times [2021-11-07 08:38:21,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:38:21,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833098697] [2021-11-07 08:38:21,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:21,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:38:21,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:22,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:38:22,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:22,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:38:22,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:38:22,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833098697] [2021-11-07 08:38:22,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833098697] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:38:22,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:38:22,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:38:22,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678135397] [2021-11-07 08:38:22,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:38:22,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:38:22,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:38:22,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:38:22,069 INFO L87 Difference]: Start difference. First operand 108 states and 153 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:38:22,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:38:22,323 INFO L93 Difference]: Finished difference Result 149 states and 214 transitions. [2021-11-07 08:38:22,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:38:22,324 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-07 08:38:22,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:38:22,327 INFO L225 Difference]: With dead ends: 149 [2021-11-07 08:38:22,328 INFO L226 Difference]: Without dead ends: 144 [2021-11-07 08:38:22,328 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:38:22,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-11-07 08:38:22,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 126. [2021-11-07 08:38:22,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 89 states have (on average 1.7752808988764044) internal successors, (158), 115 states have internal predecessors, (158), 10 states have call successors, (10), 6 states have call predecessors, (10), 7 states have return successors, (15), 5 states have call predecessors, (15), 9 states have call successors, (15) [2021-11-07 08:38:22,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 183 transitions. [2021-11-07 08:38:22,368 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 183 transitions. Word has length 11 [2021-11-07 08:38:22,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:38:22,368 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 183 transitions. [2021-11-07 08:38:22,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:38:22,371 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 183 transitions. [2021-11-07 08:38:22,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-07 08:38:22,372 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:38:22,372 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:38:22,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 08:38:22,375 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting pushErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:38:22,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:38:22,376 INFO L85 PathProgramCache]: Analyzing trace with hash 649350680, now seen corresponding path program 1 times [2021-11-07 08:38:22,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:38:22,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779015407] [2021-11-07 08:38:22,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:22,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:38:22,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:22,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:38:22,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:22,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:38:22,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:38:22,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779015407] [2021-11-07 08:38:22,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779015407] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:38:22,572 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:38:22,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:38:22,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409192723] [2021-11-07 08:38:22,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:38:22,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:38:22,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:38:22,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:38:22,574 INFO L87 Difference]: Start difference. First operand 126 states and 183 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:38:22,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:38:22,971 INFO L93 Difference]: Finished difference Result 134 states and 196 transitions. [2021-11-07 08:38:22,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:38:22,972 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-11-07 08:38:22,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:38:22,975 INFO L225 Difference]: With dead ends: 134 [2021-11-07 08:38:22,976 INFO L226 Difference]: Without dead ends: 134 [2021-11-07 08:38:22,977 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:38:22,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-11-07 08:38:23,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 128. [2021-11-07 08:38:23,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 91 states have (on average 1.7582417582417582) internal successors, (160), 116 states have internal predecessors, (160), 10 states have call successors, (10), 6 states have call predecessors, (10), 7 states have return successors, (15), 5 states have call predecessors, (15), 9 states have call successors, (15) [2021-11-07 08:38:23,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 185 transitions. [2021-11-07 08:38:23,010 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 185 transitions. Word has length 13 [2021-11-07 08:38:23,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:38:23,010 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 185 transitions. [2021-11-07 08:38:23,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:38:23,011 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 185 transitions. [2021-11-07 08:38:23,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-07 08:38:23,012 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:38:23,012 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:38:23,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 08:38:23,013 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting pushErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:38:23,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:38:23,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1870609254, now seen corresponding path program 1 times [2021-11-07 08:38:23,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:38:23,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949606981] [2021-11-07 08:38:23,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:23,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:38:23,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:23,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:38:23,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:23,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:38:23,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:38:23,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949606981] [2021-11-07 08:38:23,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949606981] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:38:23,147 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:38:23,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:38:23,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300914325] [2021-11-07 08:38:23,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:38:23,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:38:23,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:38:23,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:38:23,152 INFO L87 Difference]: Start difference. First operand 128 states and 185 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:38:23,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:38:23,621 INFO L93 Difference]: Finished difference Result 220 states and 324 transitions. [2021-11-07 08:38:23,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:38:23,622 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-11-07 08:38:23,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:38:23,625 INFO L225 Difference]: With dead ends: 220 [2021-11-07 08:38:23,625 INFO L226 Difference]: Without dead ends: 220 [2021-11-07 08:38:23,626 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:38:23,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-11-07 08:38:23,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 195. [2021-11-07 08:38:23,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 152 states have (on average 1.7236842105263157) internal successors, (262), 177 states have internal predecessors, (262), 14 states have call successors, (14), 10 states have call predecessors, (14), 11 states have return successors, (24), 7 states have call predecessors, (24), 13 states have call successors, (24) [2021-11-07 08:38:23,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 300 transitions. [2021-11-07 08:38:23,641 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 300 transitions. Word has length 13 [2021-11-07 08:38:23,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:38:23,642 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 300 transitions. [2021-11-07 08:38:23,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:38:23,642 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 300 transitions. [2021-11-07 08:38:23,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-07 08:38:23,643 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:38:23,643 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:38:23,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 08:38:23,644 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting pushErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:38:23,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:38:23,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1870609253, now seen corresponding path program 1 times [2021-11-07 08:38:23,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:38:23,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119119938] [2021-11-07 08:38:23,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:23,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:38:23,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:23,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:38:23,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:23,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:38:23,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:38:23,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119119938] [2021-11-07 08:38:23,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119119938] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:38:23,784 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:38:23,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:38:23,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303334035] [2021-11-07 08:38:23,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:38:23,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:38:23,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:38:23,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:38:23,791 INFO L87 Difference]: Start difference. First operand 195 states and 300 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:38:24,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:38:24,230 INFO L93 Difference]: Finished difference Result 271 states and 407 transitions. [2021-11-07 08:38:24,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:38:24,231 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-11-07 08:38:24,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:38:24,234 INFO L225 Difference]: With dead ends: 271 [2021-11-07 08:38:24,234 INFO L226 Difference]: Without dead ends: 271 [2021-11-07 08:38:24,235 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:38:24,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-11-07 08:38:24,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 249. [2021-11-07 08:38:24,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 204 states have (on average 1.696078431372549) internal successors, (346), 227 states have internal predecessors, (346), 14 states have call successors, (14), 14 states have call predecessors, (14), 15 states have return successors, (24), 7 states have call predecessors, (24), 13 states have call successors, (24) [2021-11-07 08:38:24,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 384 transitions. [2021-11-07 08:38:24,248 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 384 transitions. Word has length 13 [2021-11-07 08:38:24,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:38:24,249 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 384 transitions. [2021-11-07 08:38:24,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:38:24,249 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 384 transitions. [2021-11-07 08:38:24,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-07 08:38:24,254 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:38:24,254 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:38:24,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 08:38:24,255 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting pushErr4REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:38:24,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:38:24,256 INFO L85 PathProgramCache]: Analyzing trace with hash 2140662271, now seen corresponding path program 1 times [2021-11-07 08:38:24,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:38:24,256 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262542887] [2021-11-07 08:38:24,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:24,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:38:24,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:24,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:38:24,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:24,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:38:24,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:38:24,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262542887] [2021-11-07 08:38:24,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262542887] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:38:24,409 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:38:24,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:38:24,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92393157] [2021-11-07 08:38:24,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:38:24,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:38:24,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:38:24,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:38:24,411 INFO L87 Difference]: Start difference. First operand 249 states and 384 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:38:24,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:38:24,706 INFO L93 Difference]: Finished difference Result 235 states and 331 transitions. [2021-11-07 08:38:24,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 08:38:24,707 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-11-07 08:38:24,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:38:24,710 INFO L225 Difference]: With dead ends: 235 [2021-11-07 08:38:24,710 INFO L226 Difference]: Without dead ends: 235 [2021-11-07 08:38:24,712 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:38:24,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-11-07 08:38:24,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 200. [2021-11-07 08:38:24,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 163 states have (on average 1.6319018404907975) internal successors, (266), 180 states have internal predecessors, (266), 12 states have call successors, (12), 12 states have call predecessors, (12), 13 states have return successors, (18), 7 states have call predecessors, (18), 11 states have call successors, (18) [2021-11-07 08:38:24,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 296 transitions. [2021-11-07 08:38:24,729 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 296 transitions. Word has length 14 [2021-11-07 08:38:24,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:38:24,730 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 296 transitions. [2021-11-07 08:38:24,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:38:24,730 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 296 transitions. [2021-11-07 08:38:24,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 08:38:24,734 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:38:24,734 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:38:24,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 08:38:24,735 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:38:24,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:38:24,736 INFO L85 PathProgramCache]: Analyzing trace with hash 406451957, now seen corresponding path program 1 times [2021-11-07 08:38:24,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:38:24,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812478495] [2021-11-07 08:38:24,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:24,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:38:24,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:24,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:38:24,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:24,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:38:24,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:38:24,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812478495] [2021-11-07 08:38:24,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812478495] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:38:24,891 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:38:24,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:38:24,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134234840] [2021-11-07 08:38:24,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:38:24,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:38:24,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:38:24,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:38:24,894 INFO L87 Difference]: Start difference. First operand 200 states and 296 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:38:25,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:38:25,272 INFO L93 Difference]: Finished difference Result 367 states and 512 transitions. [2021-11-07 08:38:25,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 08:38:25,274 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-11-07 08:38:25,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:38:25,277 INFO L225 Difference]: With dead ends: 367 [2021-11-07 08:38:25,278 INFO L226 Difference]: Without dead ends: 367 [2021-11-07 08:38:25,278 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:38:25,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-11-07 08:38:25,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 341. [2021-11-07 08:38:25,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 276 states have (on average 1.5072463768115942) internal successors, (416), 305 states have internal predecessors, (416), 22 states have call successors, (22), 22 states have call predecessors, (22), 31 states have return successors, (44), 13 states have call predecessors, (44), 21 states have call successors, (44) [2021-11-07 08:38:25,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 482 transitions. [2021-11-07 08:38:25,301 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 482 transitions. Word has length 15 [2021-11-07 08:38:25,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:38:25,301 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 482 transitions. [2021-11-07 08:38:25,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:38:25,302 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 482 transitions. [2021-11-07 08:38:25,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 08:38:25,303 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:38:25,304 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:38:25,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 08:38:25,304 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:38:25,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:38:25,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1475656894, now seen corresponding path program 1 times [2021-11-07 08:38:25,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:38:25,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332719968] [2021-11-07 08:38:25,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:25,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:38:25,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:25,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:38:25,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:25,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-07 08:38:25,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:25,526 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:38:25,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:38:25,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332719968] [2021-11-07 08:38:25,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332719968] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:38:25,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631789995] [2021-11-07 08:38:25,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:25,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:38:25,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:38:25,537 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:38:25,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 08:38:25,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:25,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 08:38:25,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:38:25,941 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:38:25,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631789995] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:38:25,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:38:25,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-11-07 08:38:25,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227130709] [2021-11-07 08:38:25,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 08:38:25,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:38:25,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 08:38:25,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:38:25,944 INFO L87 Difference]: Start difference. First operand 341 states and 482 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-07 08:38:27,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:38:27,089 INFO L93 Difference]: Finished difference Result 431 states and 610 transitions. [2021-11-07 08:38:27,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 08:38:27,090 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 22 [2021-11-07 08:38:27,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:38:27,095 INFO L225 Difference]: With dead ends: 431 [2021-11-07 08:38:27,096 INFO L226 Difference]: Without dead ends: 431 [2021-11-07 08:38:27,097 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2021-11-07 08:38:27,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-11-07 08:38:27,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 355. [2021-11-07 08:38:27,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 281 states have (on average 1.4697508896797153) internal successors, (413), 319 states have internal predecessors, (413), 22 states have call successors, (22), 22 states have call predecessors, (22), 40 states have return successors, (53), 13 states have call predecessors, (53), 21 states have call successors, (53) [2021-11-07 08:38:27,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 488 transitions. [2021-11-07 08:38:27,122 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 488 transitions. Word has length 22 [2021-11-07 08:38:27,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:38:27,123 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 488 transitions. [2021-11-07 08:38:27,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-07 08:38:27,124 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 488 transitions. [2021-11-07 08:38:27,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 08:38:27,125 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:38:27,125 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:38:27,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 08:38:27,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:38:27,352 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:38:27,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:38:27,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1528489980, now seen corresponding path program 1 times [2021-11-07 08:38:27,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:38:27,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423850332] [2021-11-07 08:38:27,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:27,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:38:27,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:27,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:38:27,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:27,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-07 08:38:27,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:27,596 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:38:27,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:38:27,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423850332] [2021-11-07 08:38:27,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423850332] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:38:27,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99107465] [2021-11-07 08:38:27,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:27,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:38:27,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:38:27,599 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:38:27,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 08:38:27,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:27,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 08:38:27,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:38:28,012 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:38:28,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99107465] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:38:28,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:38:28,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-11-07 08:38:28,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307606484] [2021-11-07 08:38:28,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 08:38:28,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:38:28,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 08:38:28,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-07 08:38:28,015 INFO L87 Difference]: Start difference. First operand 355 states and 488 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-07 08:38:29,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:38:29,195 INFO L93 Difference]: Finished difference Result 623 states and 847 transitions. [2021-11-07 08:38:29,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 08:38:29,199 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 24 [2021-11-07 08:38:29,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:38:29,203 INFO L225 Difference]: With dead ends: 623 [2021-11-07 08:38:29,203 INFO L226 Difference]: Without dead ends: 623 [2021-11-07 08:38:29,204 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=181, Invalid=575, Unknown=0, NotChecked=0, Total=756 [2021-11-07 08:38:29,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2021-11-07 08:38:29,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 530. [2021-11-07 08:38:29,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 416 states have (on average 1.4254807692307692) internal successors, (593), 478 states have internal predecessors, (593), 32 states have call successors, (32), 32 states have call predecessors, (32), 70 states have return successors, (91), 19 states have call predecessors, (91), 31 states have call successors, (91) [2021-11-07 08:38:29,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 716 transitions. [2021-11-07 08:38:29,234 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 716 transitions. Word has length 24 [2021-11-07 08:38:29,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:38:29,235 INFO L470 AbstractCegarLoop]: Abstraction has 530 states and 716 transitions. [2021-11-07 08:38:29,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-07 08:38:29,235 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 716 transitions. [2021-11-07 08:38:29,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-07 08:38:29,238 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:38:29,238 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:38:29,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 08:38:29,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:38:29,448 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:38:29,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:38:29,449 INFO L85 PathProgramCache]: Analyzing trace with hash -358281637, now seen corresponding path program 1 times [2021-11-07 08:38:29,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:38:29,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176671219] [2021-11-07 08:38:29,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:29,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:38:29,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:29,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:38:29,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:29,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-07 08:38:29,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:29,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-07 08:38:29,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:29,738 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:38:29,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:38:29,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176671219] [2021-11-07 08:38:29,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176671219] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:38:29,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655243735] [2021-11-07 08:38:29,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:29,740 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:38:29,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:38:29,742 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:38:29,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 08:38:29,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:29,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-07 08:38:29,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:38:30,276 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:38:30,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655243735] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:38:30,276 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:38:30,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-11-07 08:38:30,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248062192] [2021-11-07 08:38:30,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 08:38:30,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:38:30,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 08:38:30,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-07 08:38:30,279 INFO L87 Difference]: Start difference. First operand 530 states and 716 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 9 states have internal predecessors, (34), 4 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-07 08:38:31,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:38:31,698 INFO L93 Difference]: Finished difference Result 1727 states and 2420 transitions. [2021-11-07 08:38:31,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 08:38:31,705 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 9 states have internal predecessors, (34), 4 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 35 [2021-11-07 08:38:31,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:38:31,725 INFO L225 Difference]: With dead ends: 1727 [2021-11-07 08:38:31,725 INFO L226 Difference]: Without dead ends: 1727 [2021-11-07 08:38:31,726 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-11-07 08:38:31,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1727 states. [2021-11-07 08:38:31,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1727 to 1484. [2021-11-07 08:38:31,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1484 states, 1196 states have (on average 1.4088628762541806) internal successors, (1685), 1336 states have internal predecessors, (1685), 92 states have call successors, (92), 92 states have call predecessors, (92), 184 states have return successors, (271), 55 states have call predecessors, (271), 91 states have call successors, (271) [2021-11-07 08:38:31,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1484 states to 1484 states and 2048 transitions. [2021-11-07 08:38:31,838 INFO L78 Accepts]: Start accepts. Automaton has 1484 states and 2048 transitions. Word has length 35 [2021-11-07 08:38:31,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:38:31,839 INFO L470 AbstractCegarLoop]: Abstraction has 1484 states and 2048 transitions. [2021-11-07 08:38:31,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 9 states have internal predecessors, (34), 4 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-07 08:38:31,840 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states and 2048 transitions. [2021-11-07 08:38:31,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-07 08:38:31,847 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:38:31,848 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:38:31,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 08:38:32,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-07 08:38:32,076 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:38:32,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:38:32,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1356372979, now seen corresponding path program 1 times [2021-11-07 08:38:32,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:38:32,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636690120] [2021-11-07 08:38:32,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:32,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:38:32,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:32,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:38:32,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:32,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-07 08:38:32,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:32,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-07 08:38:32,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:32,378 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:38:32,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:38:32,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636690120] [2021-11-07 08:38:32,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636690120] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:38:32,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876695573] [2021-11-07 08:38:32,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:32,380 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:38:32,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:38:32,384 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:38:32,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 08:38:32,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:32,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 08:38:32,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:38:32,886 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:38:32,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876695573] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:38:32,886 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:38:32,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-11-07 08:38:32,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168594281] [2021-11-07 08:38:32,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 08:38:32,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:38:32,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 08:38:32,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-11-07 08:38:32,893 INFO L87 Difference]: Start difference. First operand 1484 states and 2048 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 10 states have internal predecessors, (46), 4 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-07 08:38:34,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:38:34,137 INFO L93 Difference]: Finished difference Result 2098 states and 3033 transitions. [2021-11-07 08:38:34,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-07 08:38:34,138 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 10 states have internal predecessors, (46), 4 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 36 [2021-11-07 08:38:34,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:38:34,157 INFO L225 Difference]: With dead ends: 2098 [2021-11-07 08:38:34,158 INFO L226 Difference]: Without dead ends: 2098 [2021-11-07 08:38:34,159 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=176, Invalid=580, Unknown=0, NotChecked=0, Total=756 [2021-11-07 08:38:34,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2098 states. [2021-11-07 08:38:34,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2098 to 1836. [2021-11-07 08:38:34,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1836 states, 1471 states have (on average 1.399048266485384) internal successors, (2058), 1652 states have internal predecessors, (2058), 128 states have call successors, (128), 110 states have call predecessors, (128), 225 states have return successors, (377), 73 states have call predecessors, (377), 127 states have call successors, (377) [2021-11-07 08:38:34,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1836 states to 1836 states and 2563 transitions. [2021-11-07 08:38:34,291 INFO L78 Accepts]: Start accepts. Automaton has 1836 states and 2563 transitions. Word has length 36 [2021-11-07 08:38:34,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:38:34,293 INFO L470 AbstractCegarLoop]: Abstraction has 1836 states and 2563 transitions. [2021-11-07 08:38:34,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 10 states have internal predecessors, (46), 4 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-07 08:38:34,294 INFO L276 IsEmpty]: Start isEmpty. Operand 1836 states and 2563 transitions. [2021-11-07 08:38:34,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-07 08:38:34,297 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:38:34,297 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:38:34,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 08:38:34,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-07 08:38:34,514 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:38:34,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:38:34,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1424599507, now seen corresponding path program 1 times [2021-11-07 08:38:34,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:38:34,515 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193241111] [2021-11-07 08:38:34,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:34,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:38:34,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:34,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:38:34,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:34,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-07 08:38:34,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:34,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-07 08:38:34,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:34,802 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:38:34,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:38:34,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193241111] [2021-11-07 08:38:34,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193241111] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:38:34,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897495443] [2021-11-07 08:38:34,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:34,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:38:34,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:38:34,805 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:38:34,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 08:38:35,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:35,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 08:38:35,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:38:35,332 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:38:35,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897495443] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:38:35,333 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:38:35,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-11-07 08:38:35,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487613677] [2021-11-07 08:38:35,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 08:38:35,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:38:35,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 08:38:35,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-11-07 08:38:35,336 INFO L87 Difference]: Start difference. First operand 1836 states and 2563 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 10 states have internal predecessors, (39), 4 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-07 08:38:36,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:38:36,638 INFO L93 Difference]: Finished difference Result 1171 states and 1534 transitions. [2021-11-07 08:38:36,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-07 08:38:36,639 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 10 states have internal predecessors, (39), 4 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2021-11-07 08:38:36,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:38:36,647 INFO L225 Difference]: With dead ends: 1171 [2021-11-07 08:38:36,647 INFO L226 Difference]: Without dead ends: 1073 [2021-11-07 08:38:36,648 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2021-11-07 08:38:36,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1073 states. [2021-11-07 08:38:36,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1073 to 906. [2021-11-07 08:38:36,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 714 states have (on average 1.3389355742296918) internal successors, (956), 802 states have internal predecessors, (956), 76 states have call successors, (76), 64 states have call predecessors, (76), 104 states have return successors, (157), 39 states have call predecessors, (157), 75 states have call successors, (157) [2021-11-07 08:38:36,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 1189 transitions. [2021-11-07 08:38:36,692 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 1189 transitions. Word has length 38 [2021-11-07 08:38:36,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:38:36,692 INFO L470 AbstractCegarLoop]: Abstraction has 906 states and 1189 transitions. [2021-11-07 08:38:36,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 10 states have internal predecessors, (39), 4 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-07 08:38:36,693 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 1189 transitions. [2021-11-07 08:38:36,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-07 08:38:36,695 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:38:36,695 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:38:36,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 08:38:36,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-07 08:38:36,924 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:38:36,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:38:36,924 INFO L85 PathProgramCache]: Analyzing trace with hash 421703127, now seen corresponding path program 1 times [2021-11-07 08:38:36,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:38:36,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003391228] [2021-11-07 08:38:36,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:36,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:38:36,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:37,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:38:37,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:37,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-07 08:38:37,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:37,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-07 08:38:37,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:37,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-07 08:38:37,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:37,163 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 08:38:37,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:38:37,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003391228] [2021-11-07 08:38:37,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003391228] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:38:37,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490822869] [2021-11-07 08:38:37,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:37,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:38:37,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:38:37,165 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:38:37,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 08:38:37,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:37,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 08:38:37,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:38:37,839 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 08:38:37,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490822869] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:38:37,840 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:38:37,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-11-07 08:38:37,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689613503] [2021-11-07 08:38:37,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-07 08:38:37,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:38:37,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-07 08:38:37,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-11-07 08:38:37,843 INFO L87 Difference]: Start difference. First operand 906 states and 1189 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 12 states have internal predecessors, (59), 4 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-07 08:38:39,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:38:39,492 INFO L93 Difference]: Finished difference Result 1632 states and 2214 transitions. [2021-11-07 08:38:39,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-07 08:38:39,493 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 12 states have internal predecessors, (59), 4 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 47 [2021-11-07 08:38:39,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:38:39,507 INFO L225 Difference]: With dead ends: 1632 [2021-11-07 08:38:39,507 INFO L226 Difference]: Without dead ends: 1632 [2021-11-07 08:38:39,508 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=283, Invalid=977, Unknown=0, NotChecked=0, Total=1260 [2021-11-07 08:38:39,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1632 states. [2021-11-07 08:38:39,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1632 to 1297. [2021-11-07 08:38:39,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1297 states, 1034 states have (on average 1.3549323017408124) internal successors, (1401), 1157 states have internal predecessors, (1401), 100 states have call successors, (100), 88 states have call predecessors, (100), 151 states have return successors, (209), 51 states have call predecessors, (209), 99 states have call successors, (209) [2021-11-07 08:38:39,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 1710 transitions. [2021-11-07 08:38:39,574 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 1710 transitions. Word has length 47 [2021-11-07 08:38:39,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:38:39,575 INFO L470 AbstractCegarLoop]: Abstraction has 1297 states and 1710 transitions. [2021-11-07 08:38:39,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 12 states have internal predecessors, (59), 4 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-07 08:38:39,575 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 1710 transitions. [2021-11-07 08:38:39,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 08:38:39,578 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:38:39,578 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:38:39,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-07 08:38:39,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-07 08:38:39,792 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:38:39,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:38:39,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1681124145, now seen corresponding path program 1 times [2021-11-07 08:38:39,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:38:39,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094145289] [2021-11-07 08:38:39,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:39,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:38:39,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:39,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:38:39,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:39,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-07 08:38:39,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:39,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-07 08:38:40,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:40,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-07 08:38:40,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:40,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-07 08:38:40,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:40,102 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 41 proven. 5 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-07 08:38:40,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:38:40,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094145289] [2021-11-07 08:38:40,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094145289] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:38:40,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924930536] [2021-11-07 08:38:40,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:40,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:38:40,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:38:40,104 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:38:40,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 08:38:40,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:40,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 08:38:40,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:38:40,784 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 44 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 08:38:40,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924930536] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:38:40,785 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:38:40,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-11-07 08:38:40,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228098458] [2021-11-07 08:38:40,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 08:38:40,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:38:40,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 08:38:40,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-07 08:38:40,787 INFO L87 Difference]: Start difference. First operand 1297 states and 1710 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 9 states have internal predecessors, (47), 2 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-07 08:38:41,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:38:41,640 INFO L93 Difference]: Finished difference Result 1831 states and 2507 transitions. [2021-11-07 08:38:41,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 08:38:41,641 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 9 states have internal predecessors, (47), 2 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 58 [2021-11-07 08:38:41,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:38:41,659 INFO L225 Difference]: With dead ends: 1831 [2021-11-07 08:38:41,659 INFO L226 Difference]: Without dead ends: 1831 [2021-11-07 08:38:41,660 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2021-11-07 08:38:41,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1831 states. [2021-11-07 08:38:41,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1831 to 1321. [2021-11-07 08:38:41,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1321 states, 1046 states have (on average 1.3508604206500956) internal successors, (1413), 1181 states have internal predecessors, (1413), 100 states have call successors, (100), 88 states have call predecessors, (100), 163 states have return successors, (233), 51 states have call predecessors, (233), 99 states have call successors, (233) [2021-11-07 08:38:41,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1321 states to 1321 states and 1746 transitions. [2021-11-07 08:38:41,762 INFO L78 Accepts]: Start accepts. Automaton has 1321 states and 1746 transitions. Word has length 58 [2021-11-07 08:38:41,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:38:41,763 INFO L470 AbstractCegarLoop]: Abstraction has 1321 states and 1746 transitions. [2021-11-07 08:38:41,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 9 states have internal predecessors, (47), 2 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-07 08:38:41,764 INFO L276 IsEmpty]: Start isEmpty. Operand 1321 states and 1746 transitions. [2021-11-07 08:38:41,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 08:38:41,767 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:38:41,768 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:38:41,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-07 08:38:41,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:38:41,983 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:38:41,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:38:41,984 INFO L85 PathProgramCache]: Analyzing trace with hash 57126017, now seen corresponding path program 1 times [2021-11-07 08:38:41,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:38:41,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626149246] [2021-11-07 08:38:41,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:41,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:38:42,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:42,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:38:42,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:42,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-07 08:38:42,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:42,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-07 08:38:42,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:42,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-07 08:38:42,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:42,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-07 08:38:42,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:42,424 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 08:38:42,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:38:42,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626149246] [2021-11-07 08:38:42,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626149246] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:38:42,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314752575] [2021-11-07 08:38:42,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:42,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:38:42,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:38:42,427 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:38:42,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 08:38:42,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:42,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 08:38:42,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:38:43,228 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 24 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-07 08:38:43,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314752575] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:38:43,228 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:38:43,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 20 [2021-11-07 08:38:43,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287705139] [2021-11-07 08:38:43,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-07 08:38:43,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:38:43,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-07 08:38:43,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-11-07 08:38:43,231 INFO L87 Difference]: Start difference. First operand 1321 states and 1746 transitions. Second operand has 20 states, 20 states have (on average 4.0) internal successors, (80), 16 states have internal predecessors, (80), 7 states have call successors, (12), 8 states have call predecessors, (12), 9 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-07 08:38:54,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:38:54,804 INFO L93 Difference]: Finished difference Result 5435 states and 7408 transitions. [2021-11-07 08:38:54,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2021-11-07 08:38:54,805 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.0) internal successors, (80), 16 states have internal predecessors, (80), 7 states have call successors, (12), 8 states have call predecessors, (12), 9 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 60 [2021-11-07 08:38:54,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:38:54,847 INFO L225 Difference]: With dead ends: 5435 [2021-11-07 08:38:54,847 INFO L226 Difference]: Without dead ends: 5343 [2021-11-07 08:38:54,859 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10272 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=3114, Invalid=23618, Unknown=0, NotChecked=0, Total=26732 [2021-11-07 08:38:54,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5343 states. [2021-11-07 08:38:55,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5343 to 4426. [2021-11-07 08:38:55,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4426 states, 3518 states have (on average 1.3328595793064242) internal successors, (4689), 3956 states have internal predecessors, (4689), 340 states have call successors, (340), 298 states have call predecessors, (340), 557 states have return successors, (939), 171 states have call predecessors, (939), 339 states have call successors, (939) [2021-11-07 08:38:55,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4426 states to 4426 states and 5968 transitions. [2021-11-07 08:38:55,073 INFO L78 Accepts]: Start accepts. Automaton has 4426 states and 5968 transitions. Word has length 60 [2021-11-07 08:38:55,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:38:55,074 INFO L470 AbstractCegarLoop]: Abstraction has 4426 states and 5968 transitions. [2021-11-07 08:38:55,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.0) internal successors, (80), 16 states have internal predecessors, (80), 7 states have call successors, (12), 8 states have call predecessors, (12), 9 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-07 08:38:55,075 INFO L276 IsEmpty]: Start isEmpty. Operand 4426 states and 5968 transitions. [2021-11-07 08:38:55,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 08:38:55,077 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:38:55,077 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:38:55,120 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-07 08:38:55,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-07 08:38:55,296 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:38:55,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:38:55,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1356938417, now seen corresponding path program 1 times [2021-11-07 08:38:55,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:38:55,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867189841] [2021-11-07 08:38:55,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:55,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:38:55,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:55,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:38:55,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:55,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-07 08:38:55,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:55,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-07 08:38:55,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:55,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-07 08:38:55,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:55,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-07 08:38:55,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:55,575 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 41 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-07 08:38:55,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:38:55,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867189841] [2021-11-07 08:38:55,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867189841] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:38:55,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330209851] [2021-11-07 08:38:55,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:55,577 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:38:55,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:38:55,578 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:38:55,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-07 08:38:56,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:56,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 08:38:56,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:38:56,479 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-07 08:38:56,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330209851] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:38:56,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:38:56,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-11-07 08:38:56,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357203605] [2021-11-07 08:38:56,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-07 08:38:56,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:38:56,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-07 08:38:56,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-11-07 08:38:56,484 INFO L87 Difference]: Start difference. First operand 4426 states and 5968 transitions. Second operand has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 14 states have internal predecessors, (76), 6 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2021-11-07 08:38:58,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:38:58,848 INFO L93 Difference]: Finished difference Result 9129 states and 12769 transitions. [2021-11-07 08:38:58,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-07 08:38:58,848 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 14 states have internal predecessors, (76), 6 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 60 [2021-11-07 08:38:58,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:38:58,928 INFO L225 Difference]: With dead ends: 9129 [2021-11-07 08:38:58,929 INFO L226 Difference]: Without dead ends: 9129 [2021-11-07 08:38:58,930 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=547, Invalid=1903, Unknown=0, NotChecked=0, Total=2450 [2021-11-07 08:38:58,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9129 states. [2021-11-07 08:38:59,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9129 to 7078. [2021-11-07 08:38:59,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7078 states, 5734 states have (on average 1.3566445762120685) internal successors, (7779), 6356 states have internal predecessors, (7779), 508 states have call successors, (508), 466 states have call predecessors, (508), 825 states have return successors, (1407), 255 states have call predecessors, (1407), 507 states have call successors, (1407) [2021-11-07 08:38:59,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7078 states to 7078 states and 9694 transitions. [2021-11-07 08:38:59,338 INFO L78 Accepts]: Start accepts. Automaton has 7078 states and 9694 transitions. Word has length 60 [2021-11-07 08:38:59,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:38:59,340 INFO L470 AbstractCegarLoop]: Abstraction has 7078 states and 9694 transitions. [2021-11-07 08:38:59,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 14 states have internal predecessors, (76), 6 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2021-11-07 08:38:59,340 INFO L276 IsEmpty]: Start isEmpty. Operand 7078 states and 9694 transitions. [2021-11-07 08:38:59,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 08:38:59,348 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:38:59,348 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:38:59,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-07 08:38:59,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-07 08:38:59,568 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting popErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:38:59,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:38:59,568 INFO L85 PathProgramCache]: Analyzing trace with hash 7649356, now seen corresponding path program 1 times [2021-11-07 08:38:59,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:38:59,568 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675385253] [2021-11-07 08:38:59,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:59,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:38:59,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:59,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:38:59,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:59,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-07 08:38:59,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:59,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-07 08:38:59,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:59,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-07 08:38:59,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:59,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-07 08:38:59,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:59,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-07 08:38:59,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:38:59,966 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 57 proven. 4 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-07 08:38:59,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:38:59,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675385253] [2021-11-07 08:38:59,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675385253] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:38:59,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755493939] [2021-11-07 08:38:59,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:38:59,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:38:59,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:38:59,972 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:38:59,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-07 08:39:00,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:00,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 08:39:00,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:39:00,942 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 36 proven. 22 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-07 08:39:00,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755493939] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:39:00,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:39:00,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2021-11-07 08:39:00,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084601487] [2021-11-07 08:39:00,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 08:39:00,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:39:00,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 08:39:00,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-11-07 08:39:00,947 INFO L87 Difference]: Start difference. First operand 7078 states and 9694 transitions. Second operand has 16 states, 16 states have (on average 4.4375) internal successors, (71), 12 states have internal predecessors, (71), 5 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-11-07 08:39:03,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:39:03,462 INFO L93 Difference]: Finished difference Result 9161 states and 12559 transitions. [2021-11-07 08:39:03,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-07 08:39:03,463 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.4375) internal successors, (71), 12 states have internal predecessors, (71), 5 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 71 [2021-11-07 08:39:03,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:39:03,550 INFO L225 Difference]: With dead ends: 9161 [2021-11-07 08:39:03,551 INFO L226 Difference]: Without dead ends: 9075 [2021-11-07 08:39:03,552 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=390, Invalid=1416, Unknown=0, NotChecked=0, Total=1806 [2021-11-07 08:39:03,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9075 states. [2021-11-07 08:39:03,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9075 to 8506. [2021-11-07 08:39:03,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8506 states, 6792 states have (on average 1.3308303886925794) internal successors, (9039), 7616 states have internal predecessors, (9039), 676 states have call successors, (676), 550 states have call predecessors, (676), 1027 states have return successors, (1959), 339 states have call predecessors, (1959), 675 states have call successors, (1959) [2021-11-07 08:39:03,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8506 states to 8506 states and 11674 transitions. [2021-11-07 08:39:03,938 INFO L78 Accepts]: Start accepts. Automaton has 8506 states and 11674 transitions. Word has length 71 [2021-11-07 08:39:03,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:39:03,939 INFO L470 AbstractCegarLoop]: Abstraction has 8506 states and 11674 transitions. [2021-11-07 08:39:03,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.4375) internal successors, (71), 12 states have internal predecessors, (71), 5 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-11-07 08:39:03,941 INFO L276 IsEmpty]: Start isEmpty. Operand 8506 states and 11674 transitions. [2021-11-07 08:39:03,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 08:39:03,947 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:39:03,947 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:39:04,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-07 08:39:04,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:39:04,164 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting popErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:39:04,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:39:04,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1516849340, now seen corresponding path program 1 times [2021-11-07 08:39:04,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:39:04,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954067153] [2021-11-07 08:39:04,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:39:04,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:39:04,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:04,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:39:04,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:04,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-07 08:39:04,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:04,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-07 08:39:04,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:04,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-07 08:39:04,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:04,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-07 08:39:04,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:04,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-07 08:39:04,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:04,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-07 08:39:04,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:04,486 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 82 proven. 5 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-07 08:39:04,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:39:04,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954067153] [2021-11-07 08:39:04,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954067153] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:39:04,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422619468] [2021-11-07 08:39:04,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:39:04,488 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:39:04,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:39:04,492 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:39:04,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-07 08:39:05,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:05,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 08:39:05,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:39:05,468 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 80 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-07 08:39:05,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422619468] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:39:05,469 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:39:05,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 13 [2021-11-07 08:39:05,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241294238] [2021-11-07 08:39:05,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 08:39:05,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:39:05,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 08:39:05,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-11-07 08:39:05,472 INFO L87 Difference]: Start difference. First operand 8506 states and 11674 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 9 states have internal predecessors, (59), 3 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-07 08:39:06,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:39:06,674 INFO L93 Difference]: Finished difference Result 11210 states and 15593 transitions. [2021-11-07 08:39:06,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-07 08:39:06,675 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 9 states have internal predecessors, (59), 3 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 82 [2021-11-07 08:39:06,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:39:06,732 INFO L225 Difference]: With dead ends: 11210 [2021-11-07 08:39:06,732 INFO L226 Difference]: Without dead ends: 11210 [2021-11-07 08:39:06,733 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=160, Invalid=542, Unknown=0, NotChecked=0, Total=702 [2021-11-07 08:39:06,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11210 states. [2021-11-07 08:39:07,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11210 to 8506. [2021-11-07 08:39:07,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8506 states, 6792 states have (on average 1.3308303886925794) internal successors, (9039), 7616 states have internal predecessors, (9039), 676 states have call successors, (676), 550 states have call predecessors, (676), 1027 states have return successors, (1959), 339 states have call predecessors, (1959), 675 states have call successors, (1959) [2021-11-07 08:39:07,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8506 states to 8506 states and 11674 transitions. [2021-11-07 08:39:07,173 INFO L78 Accepts]: Start accepts. Automaton has 8506 states and 11674 transitions. Word has length 82 [2021-11-07 08:39:07,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:39:07,174 INFO L470 AbstractCegarLoop]: Abstraction has 8506 states and 11674 transitions. [2021-11-07 08:39:07,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 9 states have internal predecessors, (59), 3 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-07 08:39:07,174 INFO L276 IsEmpty]: Start isEmpty. Operand 8506 states and 11674 transitions. [2021-11-07 08:39:07,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 08:39:07,179 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:39:07,179 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:39:07,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-07 08:39:07,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:39:07,396 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting popErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:39:07,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:39:07,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1173694170, now seen corresponding path program 1 times [2021-11-07 08:39:07,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:39:07,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517946258] [2021-11-07 08:39:07,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:39:07,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:39:07,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:07,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:39:07,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:07,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-07 08:39:07,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:07,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-07 08:39:07,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:07,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-07 08:39:07,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:07,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-07 08:39:07,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:07,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-07 08:39:07,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:07,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-07 08:39:07,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:07,726 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 72 proven. 14 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-07 08:39:07,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:39:07,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517946258] [2021-11-07 08:39:07,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517946258] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:39:07,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173572333] [2021-11-07 08:39:07,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:39:07,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:39:07,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:39:07,732 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:39:07,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-07 08:39:08,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:08,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 08:39:08,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:39:08,808 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 48 proven. 43 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-07 08:39:08,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173572333] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:39:08,809 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:39:08,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-11-07 08:39:08,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778007485] [2021-11-07 08:39:08,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-07 08:39:08,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:39:08,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-07 08:39:08,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-11-07 08:39:08,812 INFO L87 Difference]: Start difference. First operand 8506 states and 11674 transitions. Second operand has 19 states, 19 states have (on average 4.631578947368421) internal successors, (88), 15 states have internal predecessors, (88), 6 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-11-07 08:39:12,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:39:12,689 INFO L93 Difference]: Finished difference Result 13729 states and 18929 transitions. [2021-11-07 08:39:12,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-07 08:39:12,690 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.631578947368421) internal successors, (88), 15 states have internal predecessors, (88), 6 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 84 [2021-11-07 08:39:12,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:39:12,764 INFO L225 Difference]: With dead ends: 13729 [2021-11-07 08:39:12,764 INFO L226 Difference]: Without dead ends: 13093 [2021-11-07 08:39:12,770 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=778, Invalid=3254, Unknown=0, NotChecked=0, Total=4032 [2021-11-07 08:39:12,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13093 states. [2021-11-07 08:39:13,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13093 to 8840. [2021-11-07 08:39:13,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8840 states, 7064 states have (on average 1.3180917327293318) internal successors, (9311), 7908 states have internal predecessors, (9311), 676 states have call successors, (676), 592 states have call predecessors, (676), 1089 states have return successors, (2001), 339 states have call predecessors, (2001), 675 states have call successors, (2001) [2021-11-07 08:39:13,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8840 states to 8840 states and 11988 transitions. [2021-11-07 08:39:13,230 INFO L78 Accepts]: Start accepts. Automaton has 8840 states and 11988 transitions. Word has length 84 [2021-11-07 08:39:13,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:39:13,231 INFO L470 AbstractCegarLoop]: Abstraction has 8840 states and 11988 transitions. [2021-11-07 08:39:13,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.631578947368421) internal successors, (88), 15 states have internal predecessors, (88), 6 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-11-07 08:39:13,231 INFO L276 IsEmpty]: Start isEmpty. Operand 8840 states and 11988 transitions. [2021-11-07 08:39:13,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 08:39:13,238 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:39:13,238 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 5, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:39:13,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-07 08:39:13,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-07 08:39:13,452 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:39:13,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:39:13,452 INFO L85 PathProgramCache]: Analyzing trace with hash 57278106, now seen corresponding path program 1 times [2021-11-07 08:39:13,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:39:13,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223927145] [2021-11-07 08:39:13,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:39:13,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:39:13,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:13,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-07 08:39:13,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:13,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-07 08:39:13,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:13,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-07 08:39:13,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:13,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-07 08:39:13,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:13,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-07 08:39:13,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:13,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-07 08:39:13,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:13,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-07 08:39:13,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:13,754 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 70 proven. 29 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-07 08:39:13,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:39:13,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223927145] [2021-11-07 08:39:13,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223927145] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:39:13,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716351733] [2021-11-07 08:39:13,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:39:13,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:39:13,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:39:13,760 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:39:13,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-07 08:39:14,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:14,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 642 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 08:39:14,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:39:14,759 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 122 proven. 11 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-07 08:39:14,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716351733] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:39:14,760 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:39:14,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-11-07 08:39:14,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669000356] [2021-11-07 08:39:14,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 08:39:14,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:39:14,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 08:39:14,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-11-07 08:39:14,763 INFO L87 Difference]: Start difference. First operand 8840 states and 11988 transitions. Second operand has 18 states, 18 states have (on average 4.5) internal successors, (81), 15 states have internal predecessors, (81), 6 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2021-11-07 08:39:16,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:39:16,780 INFO L93 Difference]: Finished difference Result 7383 states and 9497 transitions. [2021-11-07 08:39:16,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-07 08:39:16,781 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.5) internal successors, (81), 15 states have internal predecessors, (81), 6 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) Word has length 84 [2021-11-07 08:39:16,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:39:16,811 INFO L225 Difference]: With dead ends: 7383 [2021-11-07 08:39:16,811 INFO L226 Difference]: Without dead ends: 6879 [2021-11-07 08:39:16,813 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=589, Invalid=2063, Unknown=0, NotChecked=0, Total=2652 [2021-11-07 08:39:16,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6879 states. [2021-11-07 08:39:17,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6879 to 6570. [2021-11-07 08:39:17,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6570 states, 5270 states have (on average 1.276470588235294) internal successors, (6727), 5848 states have internal predecessors, (6727), 508 states have call successors, (508), 466 states have call predecessors, (508), 781 states have return successors, (1239), 255 states have call predecessors, (1239), 507 states have call successors, (1239) [2021-11-07 08:39:17,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6570 states to 6570 states and 8474 transitions. [2021-11-07 08:39:17,161 INFO L78 Accepts]: Start accepts. Automaton has 6570 states and 8474 transitions. Word has length 84 [2021-11-07 08:39:17,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:39:17,162 INFO L470 AbstractCegarLoop]: Abstraction has 6570 states and 8474 transitions. [2021-11-07 08:39:17,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.5) internal successors, (81), 15 states have internal predecessors, (81), 6 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2021-11-07 08:39:17,162 INFO L276 IsEmpty]: Start isEmpty. Operand 6570 states and 8474 transitions. [2021-11-07 08:39:17,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 08:39:17,165 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:39:17,166 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:39:17,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-07 08:39:17,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:39:17,380 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:39:17,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:39:17,381 INFO L85 PathProgramCache]: Analyzing trace with hash -478636956, now seen corresponding path program 1 times [2021-11-07 08:39:17,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:39:17,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013293819] [2021-11-07 08:39:17,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:39:17,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:39:17,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 08:39:17,479 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-07 08:39:17,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 08:39:17,673 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-07 08:39:17,673 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-11-07 08:39:17,675 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr5ENSURES_VIOLATIONMEMORY_LEAK [2021-11-07 08:39:17,678 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr0REQUIRES_VIOLATION [2021-11-07 08:39:17,679 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr1REQUIRES_VIOLATION [2021-11-07 08:39:17,679 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr2REQUIRES_VIOLATION [2021-11-07 08:39:17,679 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr3REQUIRES_VIOLATION [2021-11-07 08:39:17,680 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr4REQUIRES_VIOLATION [2021-11-07 08:39:17,680 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr5REQUIRES_VIOLATION [2021-11-07 08:39:17,680 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr6REQUIRES_VIOLATION [2021-11-07 08:39:17,681 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr7REQUIRES_VIOLATION [2021-11-07 08:39:17,681 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr0REQUIRES_VIOLATION [2021-11-07 08:39:17,681 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr1REQUIRES_VIOLATION [2021-11-07 08:39:17,681 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr2REQUIRES_VIOLATION [2021-11-07 08:39:17,682 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr3REQUIRES_VIOLATION [2021-11-07 08:39:17,682 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr4REQUIRES_VIOLATION [2021-11-07 08:39:17,682 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr5REQUIRES_VIOLATION [2021-11-07 08:39:17,683 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-11-07 08:39:17,683 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-11-07 08:39:17,684 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2ASSERT_VIOLATIONMEMORY_FREE [2021-11-07 08:39:17,684 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3ASSERT_VIOLATIONMEMORY_FREE [2021-11-07 08:39:17,685 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4ASSERT_VIOLATIONMEMORY_FREE [2021-11-07 08:39:17,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-07 08:39:17,691 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:39:17,696 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-07 08:39:17,810 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-11-07 08:39:17,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 08:39:17 BoogieIcfgContainer [2021-11-07 08:39:17,897 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-07 08:39:17,897 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-07 08:39:17,897 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-07 08:39:17,898 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-07 08:39:17,899 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:38:19" (3/4) ... [2021-11-07 08:39:17,903 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-07 08:39:17,904 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-07 08:39:17,906 INFO L168 Benchmark]: Toolchain (without parser) took 60207.96 ms. Allocated memory was 94.4 MB in the beginning and 436.2 MB in the end (delta: 341.8 MB). Free memory was 58.8 MB in the beginning and 240.9 MB in the end (delta: -182.1 MB). Peak memory consumption was 160.6 MB. Max. memory is 16.1 GB. [2021-11-07 08:39:17,907 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 94.4 MB. Free memory was 64.7 MB in the beginning and 64.7 MB in the end (delta: 28.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 08:39:17,907 INFO L168 Benchmark]: CACSL2BoogieTranslator took 728.21 ms. Allocated memory is still 94.4 MB. Free memory was 58.6 MB in the beginning and 61.2 MB in the end (delta: -2.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 08:39:17,908 INFO L168 Benchmark]: Boogie Preprocessor took 121.18 ms. Allocated memory is still 94.4 MB. Free memory was 61.2 MB in the beginning and 58.4 MB in the end (delta: 2.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-11-07 08:39:17,908 INFO L168 Benchmark]: RCFGBuilder took 885.55 ms. Allocated memory was 94.4 MB in the beginning and 119.5 MB in the end (delta: 25.2 MB). Free memory was 58.4 MB in the beginning and 92.7 MB in the end (delta: -34.3 MB). Peak memory consumption was 31.6 MB. Max. memory is 16.1 GB. [2021-11-07 08:39:17,909 INFO L168 Benchmark]: TraceAbstraction took 58450.38 ms. Allocated memory was 119.5 MB in the beginning and 436.2 MB in the end (delta: 316.7 MB). Free memory was 92.7 MB in the beginning and 242.0 MB in the end (delta: -149.3 MB). Peak memory consumption was 167.2 MB. Max. memory is 16.1 GB. [2021-11-07 08:39:17,910 INFO L168 Benchmark]: Witness Printer took 6.64 ms. Allocated memory is still 436.2 MB. Free memory was 242.0 MB in the beginning and 240.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 08:39:17,912 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 94.4 MB. Free memory was 64.7 MB in the beginning and 64.7 MB in the end (delta: 28.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 728.21 ms. Allocated memory is still 94.4 MB. Free memory was 58.6 MB in the beginning and 61.2 MB in the end (delta: -2.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 121.18 ms. Allocated memory is still 94.4 MB. Free memory was 61.2 MB in the beginning and 58.4 MB in the end (delta: 2.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 885.55 ms. Allocated memory was 94.4 MB in the beginning and 119.5 MB in the end (delta: 25.2 MB). Free memory was 58.4 MB in the beginning and 92.7 MB in the end (delta: -34.3 MB). Peak memory consumption was 31.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 58450.38 ms. Allocated memory was 119.5 MB in the beginning and 436.2 MB in the end (delta: 316.7 MB). Free memory was 92.7 MB in the beginning and 242.0 MB in the end (delta: -149.3 MB). Peak memory consumption was 167.2 MB. Max. memory is 16.1 GB. * Witness Printer took 6.64 ms. Allocated memory is still 436.2 MB. Free memory was 242.0 MB in the beginning and 240.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 592]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 592. Possible FailurePath: [L528] struct cell *S; [L529] int pc1 = 1; [L530] int pc4 = 1; [L531] static struct cell *t1 = ((void *)0); [L532] static struct cell *x1 = ((void *)0); [L561] struct cell* garbage; [L562] static struct cell *t4 = ((void *)0); [L563] static struct cell *x4 = ((void *)0); [L566] static int res4; VAL [\old(garbage)=54, \old(garbage)=49, \old(pc1)=67, \old(pc4)=50, \old(res4)=60, \old(S)=57, \old(S)=55, \old(t1)=62, \old(t1)=70, \old(t4)=58, \old(t4)=53, \old(x1)=74, \old(x1)=61, \old(x4)=68, \old(x4)=51, garbage={0:0}, pc1=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] [L594] 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() [L594] 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() VAL [1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int()=1, \old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, __VERIFIER_nondet_int()=1, garbage={0:0}, pc1=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] [L594] COND TRUE 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L537] x1 = malloc(sizeof(*x1)) [L538] x1->data = 0 VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=2, pc1++=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L539] x1->next = ((void *)0) VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=2, pc1++=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() VAL [1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int()=1, \old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] COND TRUE 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=2, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=-1, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L541] case 2: VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=2, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=-1, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=3, pc1++=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L542] x1->data = 4 VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=2, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=-1, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=3, pc1++=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=3, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() VAL [1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int()=1, \old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=3, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] COND TRUE 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=3, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=-1, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=3, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L545] t1 = S VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=3, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=-1, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=4, pc1++=3, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=4, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() VAL [1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int()=1, \old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=4, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] COND TRUE 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=4, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=-1, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=4, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L547] case 4: VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=4, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=-1, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=5, pc1++=4, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L548] x1->next = t1 VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=4, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=-1, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=5, pc1++=4, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=5, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() VAL [1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int()=1, \old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=5, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] COND TRUE 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=5, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=-1, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=5, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L547] case 4: [L550] case 5: VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=5, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=-1, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc1++=5, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L551] COND TRUE S == t1 [L552] S = x1 VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=5, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=-1, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc1++=5, pc4=1, res4=0, S={-1:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=1, res4=0, S={-1:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() VAL [1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int()=1, \old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=1, res4=0, S={-1:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] COND TRUE 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=6, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=-1, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=-1, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=6, pc4=1, res4=0, S={-1:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L547] case 4: [L550] case 5: [L556] case 6: [L557] pc1 = 1 VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=6, \old(pc4)=1, \old(res4)=0, \old(S)=-1, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=-1, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=1, pc1++=6, pc4=1, res4=0, S={-1:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=1, pc4=1, res4=0, S={-1:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() [L594] 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() VAL [1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int()=0, \old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, __VERIFIER_nondet_int()=0, garbage={0:0}, pc1=1, pc4=1, res4=0, S={-1:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] COND FALSE !(1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int()) [L600] COND FALSE !(\read(*garbage)) VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, garbage={0:0}, pc1=1, pc4=1, res4=0, S={-1:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L605] S = ((void *)0) [L606] t1 = ((void *)0) [L607] x1 = ((void *)0) [L608] t4 = ((void *)0) [L609] x4 = ((void *)0) [L610] return !!garbage; VAL [\old(garbage)=0, \old(garbage)=0, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=0, \old(S)=0, \old(t1)=0, \old(t1)=0, \old(t4)=0, \old(t4)=0, \old(x1)=0, \old(x1)=0, \old(x4)=0, \old(x4)=0, \result=0, garbage={0:0}, pc1=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 539]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 539]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 585]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 585]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 586]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 586]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 601]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 601]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 11 procedures, 92 locations, 20 error locations. Started 1 CEGAR loops. OverallTime: 58.1s, OverallIterations: 23, TraceHistogramMax: 7, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 36.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1947 SDtfs, 6771 SDslu, 4282 SDs, 0 SdLazy, 13799 SolverSat, 2709 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1494 GetRequests, 891 SyntacticMatches, 2 SemanticMatches, 601 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14297 ImplicationChecksByTransitivity, 20.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=8840occurred in iteration=21, InterpolantAutomatonStates: 533, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 3.0s AutomataMinimizationTime, 22 MinimizatonAttempts, 12685 StatesRemovedByMinimization, 22 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.6s SatisfiabilityAnalysisTime, 9.5s InterpolantComputationTime, 1594 NumberOfCodeBlocks, 1594 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 1474 ConstructedInterpolants, 0 QuantifiedInterpolants, 6919 SizeOfPredicates, 58 NumberOfNonLiveVariables, 6597 ConjunctsInSsa, 220 ConjunctsInUnsatCore, 35 InterpolantComputations, 9 PerfectInterpolantSequences, 1332/1656 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-07 08:39:17,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/lockfree-3.1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY --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 f3bd5e04188199017a119b2ef3a434e2cfadf1e2e5bbf4182b28eb1a822c186f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 08:39:21,510 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 08:39:21,515 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 08:39:21,593 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 08:39:21,594 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 08:39:21,603 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 08:39:21,606 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 08:39:21,617 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 08:39:21,623 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 08:39:21,632 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 08:39:21,635 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 08:39:21,638 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 08:39:21,639 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 08:39:21,643 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 08:39:21,647 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 08:39:21,655 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 08:39:21,658 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 08:39:21,660 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 08:39:21,664 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 08:39:21,676 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 08:39:21,680 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 08:39:21,682 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 08:39:21,686 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 08:39:21,690 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 08:39:21,706 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 08:39:21,706 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 08:39:21,707 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 08:39:21,711 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 08:39:21,712 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 08:39:21,714 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 08:39:21,715 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 08:39:21,716 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 08:39:21,720 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 08:39:21,722 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 08:39:21,725 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 08:39:21,725 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 08:39:21,727 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 08:39:21,728 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 08:39:21,728 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 08:39:21,732 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 08:39:21,733 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 08:39:21,742 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-11-07 08:39:21,802 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 08:39:21,803 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 08:39:21,804 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 08:39:21,804 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 08:39:21,808 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 08:39:21,808 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 08:39:21,808 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 08:39:21,809 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 08:39:21,809 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 08:39:21,809 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 08:39:21,811 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 08:39:21,812 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 08:39:21,812 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 08:39:21,812 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 08:39:21,813 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 08:39:21,813 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-07 08:39:21,814 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 08:39:21,814 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 08:39:21,814 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 08:39:21,814 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 08:39:21,815 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 08:39:21,815 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 08:39:21,816 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 08:39:21,816 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 08:39:21,816 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 08:39:21,816 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:39:21,817 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 08:39:21,818 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 08:39:21,818 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-07 08:39:21,818 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 08:39:21,819 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 08:39:21,819 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 08:39:21,820 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f3bd5e04188199017a119b2ef3a434e2cfadf1e2e5bbf4182b28eb1a822c186f [2021-11-07 08:39:22,468 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 08:39:22,522 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 08:39:22,526 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 08:39:22,528 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 08:39:22,530 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 08:39:22,531 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/memsafety/lockfree-3.1.i [2021-11-07 08:39:22,640 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/data/9dd5a1932/45d41e61193a44d4b5e70eb34a48eede/FLAG15c4c96d4 [2021-11-07 08:39:23,616 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 08:39:23,617 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/sv-benchmarks/c/memsafety/lockfree-3.1.i [2021-11-07 08:39:23,642 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/data/9dd5a1932/45d41e61193a44d4b5e70eb34a48eede/FLAG15c4c96d4 [2021-11-07 08:39:23,792 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/data/9dd5a1932/45d41e61193a44d4b5e70eb34a48eede [2021-11-07 08:39:23,797 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 08:39:23,816 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-07 08:39:23,820 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 08:39:23,820 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 08:39:23,825 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 08:39:23,827 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:39:23" (1/1) ... [2021-11-07 08:39:23,828 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d332d87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:39:23, skipping insertion in model container [2021-11-07 08:39:23,829 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:39:23" (1/1) ... [2021-11-07 08:39:23,840 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 08:39:23,932 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 08:39:24,372 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:39:24,391 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 08:39:24,456 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:39:24,525 INFO L208 MainTranslator]: Completed translation [2021-11-07 08:39:24,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:39:24 WrapperNode [2021-11-07 08:39:24,526 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 08:39:24,530 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 08:39:24,530 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 08:39:24,531 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 08:39:24,549 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:39:24" (1/1) ... [2021-11-07 08:39:24,549 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:39:24" (1/1) ... [2021-11-07 08:39:24,602 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:39:24" (1/1) ... [2021-11-07 08:39:24,603 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:39:24" (1/1) ... [2021-11-07 08:39:24,632 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:39:24" (1/1) ... [2021-11-07 08:39:24,638 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:39:24" (1/1) ... [2021-11-07 08:39:24,646 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:39:24" (1/1) ... [2021-11-07 08:39:24,656 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 08:39:24,664 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 08:39:24,665 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 08:39:24,666 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 08:39:24,667 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:39:24" (1/1) ... [2021-11-07 08:39:24,677 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:39:24,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:39:24,714 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 08:39:24,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 08:39:24,789 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-07 08:39:24,789 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 08:39:24,790 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-11-07 08:39:24,790 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-07 08:39:24,792 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-07 08:39:24,792 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-07 08:39:24,792 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-11-07 08:39:24,793 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-11-07 08:39:24,794 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-11-07 08:39:24,794 INFO L138 BoogieDeclarations]: Found implementation of procedure push [2021-11-07 08:39:24,795 INFO L138 BoogieDeclarations]: Found implementation of procedure pop [2021-11-07 08:39:24,795 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-07 08:39:24,795 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-07 08:39:24,796 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-07 08:39:24,796 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-07 08:39:24,797 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-07 08:39:24,797 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-07 08:39:24,797 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 08:39:24,798 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-07 08:39:24,798 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-07 08:39:24,798 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-07 08:39:24,798 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-07 08:39:24,799 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-07 08:39:24,799 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-07 08:39:24,799 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-07 08:39:24,799 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-07 08:39:24,800 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-07 08:39:24,816 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-07 08:39:24,816 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-07 08:39:24,816 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-07 08:39:24,816 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-07 08:39:24,817 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-07 08:39:24,817 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-07 08:39:24,817 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-07 08:39:24,817 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-07 08:39:24,817 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-07 08:39:24,818 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-11-07 08:39:24,818 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-11-07 08:39:24,818 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-11-07 08:39:24,818 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-07 08:39:24,819 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-07 08:39:24,819 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-07 08:39:24,819 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-07 08:39:24,819 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-07 08:39:24,819 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-07 08:39:24,820 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-07 08:39:24,820 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-07 08:39:24,820 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-07 08:39:24,822 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-07 08:39:24,822 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-07 08:39:24,822 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-07 08:39:24,822 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-07 08:39:24,823 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-07 08:39:24,823 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-07 08:39:24,823 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-07 08:39:24,824 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-07 08:39:24,824 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-07 08:39:24,824 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-07 08:39:24,824 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-07 08:39:24,825 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-07 08:39:24,825 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-07 08:39:24,825 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-07 08:39:24,826 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-07 08:39:24,826 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-07 08:39:24,826 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-07 08:39:24,828 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-07 08:39:24,828 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-07 08:39:24,829 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-07 08:39:24,829 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-07 08:39:24,829 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-07 08:39:24,829 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-07 08:39:24,830 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-07 08:39:24,830 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-07 08:39:24,830 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-07 08:39:24,830 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-07 08:39:24,831 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-07 08:39:24,832 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-07 08:39:24,832 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-07 08:39:24,832 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-07 08:39:24,832 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-07 08:39:24,832 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-07 08:39:24,833 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-07 08:39:24,834 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-07 08:39:24,834 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-07 08:39:24,834 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-07 08:39:24,834 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-07 08:39:24,835 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-07 08:39:24,835 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-07 08:39:24,835 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-07 08:39:24,835 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-07 08:39:24,835 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-07 08:39:24,836 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-07 08:39:24,836 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-07 08:39:24,836 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-07 08:39:24,836 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-07 08:39:24,836 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-07 08:39:24,837 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-07 08:39:24,837 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-07 08:39:24,837 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-07 08:39:24,837 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-07 08:39:24,837 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-07 08:39:24,838 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-07 08:39:24,838 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-07 08:39:24,839 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-07 08:39:24,839 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-07 08:39:24,839 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-07 08:39:24,839 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-07 08:39:24,840 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-07 08:39:24,841 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-07 08:39:24,842 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-07 08:39:24,842 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-07 08:39:24,842 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-07 08:39:24,842 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-07 08:39:24,842 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-07 08:39:24,843 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-07 08:39:24,843 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-07 08:39:24,843 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-07 08:39:24,843 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-07 08:39:24,844 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-07 08:39:24,844 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-07 08:39:24,844 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-07 08:39:24,844 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-07 08:39:24,845 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-07 08:39:24,846 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-07 08:39:24,846 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-11-07 08:39:24,847 INFO L130 BoogieDeclarations]: Found specification of procedure push [2021-11-07 08:39:24,848 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 08:39:24,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 08:39:24,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 08:39:24,853 INFO L130 BoogieDeclarations]: Found specification of procedure pop [2021-11-07 08:39:24,853 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 08:39:24,856 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 08:39:24,857 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-07 08:39:24,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 08:39:24,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-07 08:39:24,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 08:39:24,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 08:39:24,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-11-07 08:39:24,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-07 08:39:24,865 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-07 08:39:25,954 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 08:39:25,955 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-07 08:39:25,958 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:39:25 BoogieIcfgContainer [2021-11-07 08:39:25,958 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 08:39:25,962 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 08:39:25,962 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 08:39:25,966 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 08:39:25,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:39:23" (1/3) ... [2021-11-07 08:39:25,968 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7176fb0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:39:25, skipping insertion in model container [2021-11-07 08:39:25,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:39:24" (2/3) ... [2021-11-07 08:39:25,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7176fb0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:39:25, skipping insertion in model container [2021-11-07 08:39:25,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:39:25" (3/3) ... [2021-11-07 08:39:25,971 INFO L111 eAbstractionObserver]: Analyzing ICFG lockfree-3.1.i [2021-11-07 08:39:25,979 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 08:39:25,979 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2021-11-07 08:39:26,061 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 08:39:26,073 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 08:39:26,073 INFO L340 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2021-11-07 08:39:26,099 INFO L276 IsEmpty]: Start isEmpty. Operand has 72 states, 43 states have (on average 1.9069767441860466) internal successors, (82), 65 states have internal predecessors, (82), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-07 08:39:26,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 08:39:26,130 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:39:26,131 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:39:26,132 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:39:26,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:39:26,141 INFO L85 PathProgramCache]: Analyzing trace with hash 913050877, now seen corresponding path program 1 times [2021-11-07 08:39:26,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:39:26,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [754934339] [2021-11-07 08:39:26,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:39:26,162 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:39:26,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:39:26,168 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:39:26,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 08:39:26,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:26,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 08:39:26,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:39:26,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:39:26,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:39:26,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:39:26,676 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:39:26,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [754934339] [2021-11-07 08:39:26,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [754934339] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:39:26,678 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:39:26,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 08:39:26,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290332645] [2021-11-07 08:39:26,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 08:39:26,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:39:26,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 08:39:26,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 08:39:26,713 INFO L87 Difference]: Start difference. First operand has 72 states, 43 states have (on average 1.9069767441860466) internal successors, (82), 65 states have internal predecessors, (82), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:39:26,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:39:26,741 INFO L93 Difference]: Finished difference Result 72 states and 88 transitions. [2021-11-07 08:39:26,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 08:39:26,743 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2021-11-07 08:39:26,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:39:26,759 INFO L225 Difference]: With dead ends: 72 [2021-11-07 08:39:26,759 INFO L226 Difference]: Without dead ends: 69 [2021-11-07 08:39:26,761 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 08:39:26,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-07 08:39:26,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-11-07 08:39:26,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 63 states have internal predecessors, (78), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-07 08:39:26,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 85 transitions. [2021-11-07 08:39:26,816 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 85 transitions. Word has length 8 [2021-11-07 08:39:26,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:39:26,817 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 85 transitions. [2021-11-07 08:39:26,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:39:26,818 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 85 transitions. [2021-11-07 08:39:26,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 08:39:26,819 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:39:26,819 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:39:26,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 08:39:27,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:39:27,036 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:39:27,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:39:27,037 INFO L85 PathProgramCache]: Analyzing trace with hash 913039345, now seen corresponding path program 1 times [2021-11-07 08:39:27,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:39:27,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [156001597] [2021-11-07 08:39:27,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:39:27,039 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:39:27,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:39:27,041 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:39:27,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 08:39:27,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:27,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 08:39:27,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:39:27,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:39:27,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:39:27,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:39:27,750 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:39:27,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [156001597] [2021-11-07 08:39:27,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [156001597] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:39:27,751 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:39:27,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 08:39:27,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903990349] [2021-11-07 08:39:27,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:39:27,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:39:27,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:39:27,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:39:27,760 INFO L87 Difference]: Start difference. First operand 69 states and 85 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:39:27,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:39:27,886 INFO L93 Difference]: Finished difference Result 120 states and 153 transitions. [2021-11-07 08:39:27,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:39:27,888 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2021-11-07 08:39:27,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:39:27,894 INFO L225 Difference]: With dead ends: 120 [2021-11-07 08:39:27,896 INFO L226 Difference]: Without dead ends: 120 [2021-11-07 08:39:27,897 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:39:27,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-11-07 08:39:27,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 102. [2021-11-07 08:39:27,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 71 states have (on average 1.8732394366197183) internal successors, (133), 93 states have internal predecessors, (133), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-07 08:39:27,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 145 transitions. [2021-11-07 08:39:27,947 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 145 transitions. Word has length 8 [2021-11-07 08:39:27,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:39:27,947 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 145 transitions. [2021-11-07 08:39:27,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:39:27,948 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 145 transitions. [2021-11-07 08:39:27,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 08:39:27,949 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:39:27,950 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:39:27,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 08:39:28,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:39:28,160 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:39:28,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:39:28,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1760552785, now seen corresponding path program 1 times [2021-11-07 08:39:28,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:39:28,163 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1800277492] [2021-11-07 08:39:28,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:39:28,164 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:39:28,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:39:28,178 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:39:28,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 08:39:28,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:28,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 08:39:28,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:39:28,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:39:28,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:39:28,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:39:28,527 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:39:28,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1800277492] [2021-11-07 08:39:28,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1800277492] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:39:28,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:39:28,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 08:39:28,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160949211] [2021-11-07 08:39:28,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:39:28,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:39:28,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:39:28,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:39:28,532 INFO L87 Difference]: Start difference. First operand 102 states and 145 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:39:28,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:39:28,749 INFO L93 Difference]: Finished difference Result 128 states and 182 transitions. [2021-11-07 08:39:28,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:39:28,752 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-11-07 08:39:28,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:39:28,755 INFO L225 Difference]: With dead ends: 128 [2021-11-07 08:39:28,755 INFO L226 Difference]: Without dead ends: 125 [2021-11-07 08:39:28,756 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:39:28,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-07 08:39:28,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 115. [2021-11-07 08:39:28,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 78 states have (on average 1.8333333333333333) internal successors, (143), 104 states have internal predecessors, (143), 10 states have call successors, (10), 6 states have call predecessors, (10), 7 states have return successors, (15), 5 states have call predecessors, (15), 9 states have call successors, (15) [2021-11-07 08:39:28,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 168 transitions. [2021-11-07 08:39:28,781 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 168 transitions. Word has length 9 [2021-11-07 08:39:28,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:39:28,782 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 168 transitions. [2021-11-07 08:39:28,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:39:28,783 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 168 transitions. [2021-11-07 08:39:28,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-07 08:39:28,783 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:39:28,784 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:39:28,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-07 08:39:29,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:39:29,003 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting pushErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:39:29,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:39:29,004 INFO L85 PathProgramCache]: Analyzing trace with hash 370381771, now seen corresponding path program 1 times [2021-11-07 08:39:29,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:39:29,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1695734188] [2021-11-07 08:39:29,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:39:29,006 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:39:29,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:39:29,007 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:39:29,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 08:39:29,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:29,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 08:39:29,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:39:29,324 INFO L388 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 [2021-11-07 08:39:29,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:39:29,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:39:29,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:39:29,382 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:39:29,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1695734188] [2021-11-07 08:39:29,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1695734188] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:39:29,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:39:29,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 08:39:29,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582395332] [2021-11-07 08:39:29,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:39:29,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:39:29,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:39:29,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:39:29,387 INFO L87 Difference]: Start difference. First operand 115 states and 168 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:39:29,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:39:29,639 INFO L93 Difference]: Finished difference Result 198 states and 290 transitions. [2021-11-07 08:39:29,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:39:29,643 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-07 08:39:29,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:39:29,647 INFO L225 Difference]: With dead ends: 198 [2021-11-07 08:39:29,647 INFO L226 Difference]: Without dead ends: 198 [2021-11-07 08:39:29,647 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:39:29,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-11-07 08:39:29,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 177. [2021-11-07 08:39:29,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 134 states have (on average 1.7761194029850746) internal successors, (238), 160 states have internal predecessors, (238), 14 states have call successors, (14), 10 states have call predecessors, (14), 11 states have return successors, (24), 7 states have call predecessors, (24), 13 states have call successors, (24) [2021-11-07 08:39:29,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 276 transitions. [2021-11-07 08:39:29,707 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 276 transitions. Word has length 11 [2021-11-07 08:39:29,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:39:29,707 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 276 transitions. [2021-11-07 08:39:29,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:39:29,708 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 276 transitions. [2021-11-07 08:39:29,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-07 08:39:29,709 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:39:29,709 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:39:29,732 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-07 08:39:29,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:39:29,928 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting pushErr1REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:39:29,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:39:29,929 INFO L85 PathProgramCache]: Analyzing trace with hash 370381772, now seen corresponding path program 1 times [2021-11-07 08:39:29,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:39:29,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [652371205] [2021-11-07 08:39:29,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:39:29,930 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:39:29,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:39:29,932 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:39:29,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 08:39:30,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:30,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 08:39:30,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:39:30,224 INFO L388 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 [2021-11-07 08:39:30,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:39:30,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:39:30,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:39:30,347 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:39:30,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [652371205] [2021-11-07 08:39:30,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [652371205] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:39:30,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:39:30,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 08:39:30,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715539679] [2021-11-07 08:39:30,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:39:30,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:39:30,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:39:30,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:39:30,351 INFO L87 Difference]: Start difference. First operand 177 states and 276 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:39:30,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:39:30,748 INFO L93 Difference]: Finished difference Result 333 states and 499 transitions. [2021-11-07 08:39:30,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:39:30,750 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-07 08:39:30,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:39:30,755 INFO L225 Difference]: With dead ends: 333 [2021-11-07 08:39:30,755 INFO L226 Difference]: Without dead ends: 333 [2021-11-07 08:39:30,755 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:39:30,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-11-07 08:39:30,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 295. [2021-11-07 08:39:30,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 242 states have (on average 1.7314049586776858) internal successors, (419), 268 states have internal predecessors, (419), 18 states have call successors, (18), 18 states have call predecessors, (18), 19 states have return successors, (35), 9 states have call predecessors, (35), 17 states have call successors, (35) [2021-11-07 08:39:30,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 472 transitions. [2021-11-07 08:39:30,813 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 472 transitions. Word has length 11 [2021-11-07 08:39:30,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:39:30,814 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 472 transitions. [2021-11-07 08:39:30,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:39:30,814 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 472 transitions. [2021-11-07 08:39:30,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-07 08:39:30,816 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:39:30,816 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:39:30,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 08:39:31,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:39:31,031 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting pushErr4REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:39:31,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:39:31,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1403059964, now seen corresponding path program 1 times [2021-11-07 08:39:31,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:39:31,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1003672939] [2021-11-07 08:39:31,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:39:31,033 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:39:31,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:39:31,040 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:39:31,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 08:39:31,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:31,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 08:39:31,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:39:31,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:39:31,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:39:31,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:39:31,448 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:39:31,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1003672939] [2021-11-07 08:39:31,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1003672939] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:39:31,452 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:39:31,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 08:39:31,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678046276] [2021-11-07 08:39:31,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:39:31,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:39:31,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:39:31,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:39:31,456 INFO L87 Difference]: Start difference. First operand 295 states and 472 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:39:31,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:39:31,524 INFO L93 Difference]: Finished difference Result 197 states and 283 transitions. [2021-11-07 08:39:31,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:39:31,525 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-11-07 08:39:31,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:39:31,528 INFO L225 Difference]: With dead ends: 197 [2021-11-07 08:39:31,528 INFO L226 Difference]: Without dead ends: 197 [2021-11-07 08:39:31,530 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:39:31,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-11-07 08:39:31,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 181. [2021-11-07 08:39:31,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 144 states have (on average 1.6736111111111112) internal successors, (241), 162 states have internal predecessors, (241), 12 states have call successors, (12), 12 states have call predecessors, (12), 13 states have return successors, (18), 7 states have call predecessors, (18), 11 states have call successors, (18) [2021-11-07 08:39:31,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 271 transitions. [2021-11-07 08:39:31,561 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 271 transitions. Word has length 12 [2021-11-07 08:39:31,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:39:31,561 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 271 transitions. [2021-11-07 08:39:31,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:39:31,562 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 271 transitions. [2021-11-07 08:39:31,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-07 08:39:31,563 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:39:31,563 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:39:31,579 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-07 08:39:31,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:39:31,779 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:39:31,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:39:31,779 INFO L85 PathProgramCache]: Analyzing trace with hash -2074754906, now seen corresponding path program 1 times [2021-11-07 08:39:31,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:39:31,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2021347238] [2021-11-07 08:39:31,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:39:31,780 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:39:31,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:39:31,781 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:39:31,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 08:39:32,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:32,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 08:39:32,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:39:32,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:39:32,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:39:32,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:39:32,178 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:39:32,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2021347238] [2021-11-07 08:39:32,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2021347238] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:39:32,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:39:32,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 08:39:32,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025381240] [2021-11-07 08:39:32,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:39:32,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:39:32,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:39:32,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:39:32,182 INFO L87 Difference]: Start difference. First operand 181 states and 271 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:39:32,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:39:32,240 INFO L93 Difference]: Finished difference Result 281 states and 404 transitions. [2021-11-07 08:39:32,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:39:32,241 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-11-07 08:39:32,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:39:32,245 INFO L225 Difference]: With dead ends: 281 [2021-11-07 08:39:32,245 INFO L226 Difference]: Without dead ends: 281 [2021-11-07 08:39:32,245 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:39:32,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-11-07 08:39:32,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 281. [2021-11-07 08:39:32,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 216 states have (on average 1.5648148148148149) internal successors, (338), 246 states have internal predecessors, (338), 22 states have call successors, (22), 22 states have call predecessors, (22), 31 states have return successors, (44), 13 states have call predecessors, (44), 21 states have call successors, (44) [2021-11-07 08:39:32,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 404 transitions. [2021-11-07 08:39:32,271 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 404 transitions. Word has length 13 [2021-11-07 08:39:32,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:39:32,271 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 404 transitions. [2021-11-07 08:39:32,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:39:32,272 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 404 transitions. [2021-11-07 08:39:32,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-07 08:39:32,273 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:39:32,274 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:39:32,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 08:39:32,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:39:32,487 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:39:32,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:39:32,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1772709125, now seen corresponding path program 1 times [2021-11-07 08:39:32,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:39:32,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1149671759] [2021-11-07 08:39:32,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:39:32,489 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:39:32,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:39:32,491 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:39:32,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 08:39:32,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:32,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 08:39:32,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:39:32,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:39:32,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:39:33,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:39:33,242 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:39:33,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1149671759] [2021-11-07 08:39:33,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1149671759] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 08:39:33,243 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:39:33,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-07 08:39:33,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118107746] [2021-11-07 08:39:33,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 08:39:33,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:39:33,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 08:39:33,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:39:33,246 INFO L87 Difference]: Start difference. First operand 281 states and 404 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-07 08:39:34,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:39:34,382 INFO L93 Difference]: Finished difference Result 690 states and 1010 transitions. [2021-11-07 08:39:34,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 08:39:34,383 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 18 [2021-11-07 08:39:34,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:39:34,391 INFO L225 Difference]: With dead ends: 690 [2021-11-07 08:39:34,391 INFO L226 Difference]: Without dead ends: 690 [2021-11-07 08:39:34,392 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2021-11-07 08:39:34,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2021-11-07 08:39:34,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 587. [2021-11-07 08:39:34,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 472 states have (on average 1.5423728813559323) internal successors, (728), 520 states have internal predecessors, (728), 42 states have call successors, (42), 42 states have call predecessors, (42), 61 states have return successors, (95), 25 states have call predecessors, (95), 41 states have call successors, (95) [2021-11-07 08:39:34,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 865 transitions. [2021-11-07 08:39:34,443 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 865 transitions. Word has length 18 [2021-11-07 08:39:34,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:39:34,444 INFO L470 AbstractCegarLoop]: Abstraction has 587 states and 865 transitions. [2021-11-07 08:39:34,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-07 08:39:34,444 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 865 transitions. [2021-11-07 08:39:34,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-07 08:39:34,446 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:39:34,446 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:39:34,467 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-07 08:39:34,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:39:34,664 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:39:34,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:39:34,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1092083902, now seen corresponding path program 1 times [2021-11-07 08:39:34,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:39:34,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1204412035] [2021-11-07 08:39:34,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:39:34,665 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:39:34,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:39:34,667 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:39:34,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 08:39:34,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:34,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 08:39:34,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:39:35,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:39:35,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:39:35,389 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:39:35,389 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:39:35,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1204412035] [2021-11-07 08:39:35,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1204412035] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 08:39:35,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:39:35,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-11-07 08:39:35,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053787676] [2021-11-07 08:39:35,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 08:39:35,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:39:35,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 08:39:35,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:39:35,392 INFO L87 Difference]: Start difference. First operand 587 states and 865 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-07 08:39:36,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:39:36,308 INFO L93 Difference]: Finished difference Result 909 states and 1312 transitions. [2021-11-07 08:39:36,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 08:39:36,312 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 20 [2021-11-07 08:39:36,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:39:36,322 INFO L225 Difference]: With dead ends: 909 [2021-11-07 08:39:36,324 INFO L226 Difference]: Without dead ends: 909 [2021-11-07 08:39:36,324 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-11-07 08:39:36,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2021-11-07 08:39:36,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 837. [2021-11-07 08:39:36,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 666 states have (on average 1.5015015015015014) internal successors, (1000), 738 states have internal predecessors, (1000), 62 states have call successors, (62), 62 states have call predecessors, (62), 97 states have return successors, (127), 37 states have call predecessors, (127), 61 states have call successors, (127) [2021-11-07 08:39:36,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1189 transitions. [2021-11-07 08:39:36,399 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1189 transitions. Word has length 20 [2021-11-07 08:39:36,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:39:36,400 INFO L470 AbstractCegarLoop]: Abstraction has 837 states and 1189 transitions. [2021-11-07 08:39:36,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-07 08:39:36,401 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1189 transitions. [2021-11-07 08:39:36,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 08:39:36,412 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:39:36,412 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:39:36,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 08:39:36,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:39:36,629 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:39:36,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:39:36,630 INFO L85 PathProgramCache]: Analyzing trace with hash -389155418, now seen corresponding path program 2 times [2021-11-07 08:39:36,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:39:36,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1624540998] [2021-11-07 08:39:36,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:39:36,632 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:39:36,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:39:36,633 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:39:36,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 08:39:37,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:39:37,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:39:37,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 08:39:37,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:39:37,182 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 08:39:37,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:39:37,394 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 08:39:37,395 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:39:37,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1624540998] [2021-11-07 08:39:37,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1624540998] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 08:39:37,395 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:39:37,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-11-07 08:39:37,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762435089] [2021-11-07 08:39:37,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 08:39:37,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:39:37,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 08:39:37,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:39:37,397 INFO L87 Difference]: Start difference. First operand 837 states and 1189 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-07 08:39:37,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:39:37,770 INFO L93 Difference]: Finished difference Result 1159 states and 1597 transitions. [2021-11-07 08:39:37,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 08:39:37,771 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 27 [2021-11-07 08:39:37,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:39:37,781 INFO L225 Difference]: With dead ends: 1159 [2021-11-07 08:39:37,781 INFO L226 Difference]: Without dead ends: 1159 [2021-11-07 08:39:37,784 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-11-07 08:39:37,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2021-11-07 08:39:37,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 1147. [2021-11-07 08:39:37,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 908 states have (on average 1.4405286343612336) internal successors, (1308), 1016 states have internal predecessors, (1308), 82 states have call successors, (82), 82 states have call predecessors, (82), 145 states have return successors, (195), 49 states have call predecessors, (195), 81 states have call successors, (195) [2021-11-07 08:39:37,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1585 transitions. [2021-11-07 08:39:37,857 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1585 transitions. Word has length 27 [2021-11-07 08:39:37,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:39:37,858 INFO L470 AbstractCegarLoop]: Abstraction has 1147 states and 1585 transitions. [2021-11-07 08:39:37,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-07 08:39:37,858 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1585 transitions. [2021-11-07 08:39:37,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-07 08:39:37,861 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:39:37,862 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:39:37,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 08:39:38,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:39:38,079 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting popErr0REQUIRES_VIOLATION === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:39:38,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:39:38,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1024254868, now seen corresponding path program 1 times [2021-11-07 08:39:38,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:39:38,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [158260178] [2021-11-07 08:39:38,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:39:38,080 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:39:38,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:39:38,081 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:39:38,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 08:39:38,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:38,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 08:39:38,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:39:38,875 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:39:38,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:39:39,553 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:39:39,553 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:39:39,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [158260178] [2021-11-07 08:39:39,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [158260178] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 08:39:39,554 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:39:39,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-11-07 08:39:39,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804446055] [2021-11-07 08:39:39,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 08:39:39,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:39:39,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 08:39:39,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-07 08:39:39,558 INFO L87 Difference]: Start difference. First operand 1147 states and 1585 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 4 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-07 08:39:40,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:39:40,911 INFO L93 Difference]: Finished difference Result 1680 states and 2280 transitions. [2021-11-07 08:39:40,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 08:39:40,912 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 4 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 29 [2021-11-07 08:39:40,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:39:40,928 INFO L225 Difference]: With dead ends: 1680 [2021-11-07 08:39:40,928 INFO L226 Difference]: Without dead ends: 1680 [2021-11-07 08:39:40,929 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2021-11-07 08:39:40,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1680 states. [2021-11-07 08:39:40,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1680 to 1467. [2021-11-07 08:39:40,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1467 states, 1157 states have (on average 1.4079515989628348) internal successors, (1629), 1297 states have internal predecessors, (1629), 107 states have call successors, (107), 107 states have call predecessors, (107), 191 states have return successors, (265), 63 states have call predecessors, (265), 106 states have call successors, (265) [2021-11-07 08:39:41,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1467 states to 1467 states and 2001 transitions. [2021-11-07 08:39:41,011 INFO L78 Accepts]: Start accepts. Automaton has 1467 states and 2001 transitions. Word has length 29 [2021-11-07 08:39:41,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:39:41,012 INFO L470 AbstractCegarLoop]: Abstraction has 1467 states and 2001 transitions. [2021-11-07 08:39:41,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 4 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-07 08:39:41,013 INFO L276 IsEmpty]: Start isEmpty. Operand 1467 states and 2001 transitions. [2021-11-07 08:39:41,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-07 08:39:41,014 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:39:41,015 INFO L513 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] [2021-11-07 08:39:41,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 08:39:41,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:39:41,228 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:39:41,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:39:41,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1836404925, now seen corresponding path program 1 times [2021-11-07 08:39:41,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:39:41,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [890169721] [2021-11-07 08:39:41,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:39:41,229 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:39:41,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:39:41,231 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:39:41,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 08:39:41,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:41,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 08:39:41,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:39:41,834 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:39:41,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:39:42,286 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:39:42,287 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:39:42,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [890169721] [2021-11-07 08:39:42,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [890169721] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 08:39:42,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:39:42,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 13 [2021-11-07 08:39:42,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650995239] [2021-11-07 08:39:42,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 08:39:42,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:39:42,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 08:39:42,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-07 08:39:42,290 INFO L87 Difference]: Start difference. First operand 1467 states and 2001 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 9 states have internal predecessors, (30), 3 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-07 08:39:43,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:39:43,760 INFO L93 Difference]: Finished difference Result 1681 states and 2135 transitions. [2021-11-07 08:39:43,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 08:39:43,761 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 9 states have internal predecessors, (30), 3 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2021-11-07 08:39:43,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:39:43,773 INFO L225 Difference]: With dead ends: 1681 [2021-11-07 08:39:43,773 INFO L226 Difference]: Without dead ends: 1497 [2021-11-07 08:39:43,774 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=219, Invalid=711, Unknown=0, NotChecked=0, Total=930 [2021-11-07 08:39:43,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1497 states. [2021-11-07 08:39:43,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1497 to 1379. [2021-11-07 08:39:43,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1379 states, 1071 states have (on average 1.373482726423903) internal successors, (1471), 1209 states have internal predecessors, (1471), 107 states have call successors, (107), 107 states have call predecessors, (107), 189 states have return successors, (237), 63 states have call predecessors, (237), 106 states have call successors, (237) [2021-11-07 08:39:43,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1379 states to 1379 states and 1815 transitions. [2021-11-07 08:39:43,850 INFO L78 Accepts]: Start accepts. Automaton has 1379 states and 1815 transitions. Word has length 30 [2021-11-07 08:39:43,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:39:43,851 INFO L470 AbstractCegarLoop]: Abstraction has 1379 states and 1815 transitions. [2021-11-07 08:39:43,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 9 states have internal predecessors, (30), 3 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-07 08:39:43,851 INFO L276 IsEmpty]: Start isEmpty. Operand 1379 states and 1815 transitions. [2021-11-07 08:39:43,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-07 08:39:43,855 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:39:43,855 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:39:43,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 08:39:44,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:39:44,069 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:39:44,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:39:44,070 INFO L85 PathProgramCache]: Analyzing trace with hash -746793865, now seen corresponding path program 2 times [2021-11-07 08:39:44,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:39:44,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [145374855] [2021-11-07 08:39:44,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:39:44,071 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:39:44,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:39:44,072 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:39:44,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 08:39:44,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:39:44,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:39:44,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 08:39:44,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:39:44,801 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 08:39:44,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:39:45,271 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:39:45,271 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:39:45,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [145374855] [2021-11-07 08:39:45,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [145374855] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 08:39:45,272 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:39:45,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-11-07 08:39:45,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207239014] [2021-11-07 08:39:45,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 08:39:45,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:39:45,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 08:39:45,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-07 08:39:45,274 INFO L87 Difference]: Start difference. First operand 1379 states and 1815 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 11 states have internal predecessors, (51), 6 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-07 08:39:47,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:39:47,062 INFO L93 Difference]: Finished difference Result 2266 states and 3046 transitions. [2021-11-07 08:39:47,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 08:39:47,063 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 11 states have internal predecessors, (51), 6 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) Word has length 39 [2021-11-07 08:39:47,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:39:47,082 INFO L225 Difference]: With dead ends: 2266 [2021-11-07 08:39:47,082 INFO L226 Difference]: Without dead ends: 2170 [2021-11-07 08:39:47,083 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=229, Invalid=701, Unknown=0, NotChecked=0, Total=930 [2021-11-07 08:39:47,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2170 states. [2021-11-07 08:39:47,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2170 to 1993. [2021-11-07 08:39:47,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1993 states, 1543 states have (on average 1.404406999351912) internal successors, (2167), 1753 states have internal predecessors, (2167), 165 states have call successors, (165), 153 states have call predecessors, (165), 273 states have return successors, (421), 87 states have call predecessors, (421), 164 states have call successors, (421) [2021-11-07 08:39:47,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1993 states to 1993 states and 2753 transitions. [2021-11-07 08:39:47,194 INFO L78 Accepts]: Start accepts. Automaton has 1993 states and 2753 transitions. Word has length 39 [2021-11-07 08:39:47,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:39:47,194 INFO L470 AbstractCegarLoop]: Abstraction has 1993 states and 2753 transitions. [2021-11-07 08:39:47,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 11 states have internal predecessors, (51), 6 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-07 08:39:47,195 INFO L276 IsEmpty]: Start isEmpty. Operand 1993 states and 2753 transitions. [2021-11-07 08:39:47,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-07 08:39:47,199 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:39:47,199 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:39:47,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 08:39:47,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:39:47,418 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:39:47,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:39:47,419 INFO L85 PathProgramCache]: Analyzing trace with hash -268124004, now seen corresponding path program 1 times [2021-11-07 08:39:47,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:39:47,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1769358068] [2021-11-07 08:39:47,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:39:47,420 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:39:47,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:39:47,422 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:39:47,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 08:39:47,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:47,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 08:39:47,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:39:48,300 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 08:39:48,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:39:48,929 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:39:48,929 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:39:48,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1769358068] [2021-11-07 08:39:48,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1769358068] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 08:39:48,930 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:39:48,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2021-11-07 08:39:48,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822284773] [2021-11-07 08:39:48,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 08:39:48,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:39:48,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 08:39:48,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-11-07 08:39:48,932 INFO L87 Difference]: Start difference. First operand 1993 states and 2753 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-07 08:39:51,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:39:51,083 INFO L93 Difference]: Finished difference Result 2261 states and 2959 transitions. [2021-11-07 08:39:51,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-07 08:39:51,084 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 39 [2021-11-07 08:39:51,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:39:51,104 INFO L225 Difference]: With dead ends: 2261 [2021-11-07 08:39:51,105 INFO L226 Difference]: Without dead ends: 2089 [2021-11-07 08:39:51,107 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=308, Invalid=1098, Unknown=0, NotChecked=0, Total=1406 [2021-11-07 08:39:51,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-11-07 08:39:51,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 1917. [2021-11-07 08:39:51,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1917 states, 1469 states have (on average 1.3839346494213751) internal successors, (2033), 1677 states have internal predecessors, (2033), 165 states have call successors, (165), 153 states have call predecessors, (165), 271 states have return successors, (393), 87 states have call predecessors, (393), 164 states have call successors, (393) [2021-11-07 08:39:51,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1917 states to 1917 states and 2591 transitions. [2021-11-07 08:39:51,245 INFO L78 Accepts]: Start accepts. Automaton has 1917 states and 2591 transitions. Word has length 39 [2021-11-07 08:39:51,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:39:51,246 INFO L470 AbstractCegarLoop]: Abstraction has 1917 states and 2591 transitions. [2021-11-07 08:39:51,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-07 08:39:51,246 INFO L276 IsEmpty]: Start isEmpty. Operand 1917 states and 2591 transitions. [2021-11-07 08:39:51,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 08:39:51,248 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:39:51,248 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:39:51,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 08:39:51,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:39:51,463 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:39:51,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:39:51,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1040706548, now seen corresponding path program 1 times [2021-11-07 08:39:51,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:39:51,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1760093883] [2021-11-07 08:39:51,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:39:51,465 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:39:51,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:39:51,467 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:39:51,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 08:39:52,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:39:52,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 08:39:52,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:39:53,089 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-07 08:39:53,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:39:55,747 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:39:55,747 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:39:55,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1760093883] [2021-11-07 08:39:55,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1760093883] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 08:39:55,748 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:39:55,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 26 [2021-11-07 08:39:55,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525603595] [2021-11-07 08:39:55,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-07 08:39:55,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:39:55,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-07 08:39:55,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-11-07 08:39:55,752 INFO L87 Difference]: Start difference. First operand 1917 states and 2591 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 20 states have internal predecessors, (58), 9 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2021-11-07 08:40:03,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:40:03,990 INFO L93 Difference]: Finished difference Result 3752 states and 4898 transitions. [2021-11-07 08:40:03,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-07 08:40:03,992 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 20 states have internal predecessors, (58), 9 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 45 [2021-11-07 08:40:03,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:40:04,044 INFO L225 Difference]: With dead ends: 3752 [2021-11-07 08:40:04,044 INFO L226 Difference]: Without dead ends: 3716 [2021-11-07 08:40:04,050 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1181 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=977, Invalid=4279, Unknown=0, NotChecked=0, Total=5256 [2021-11-07 08:40:04,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3716 states. [2021-11-07 08:40:04,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3716 to 3017. [2021-11-07 08:40:04,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3017 states, 2325 states have (on average 1.3320430107526882) internal successors, (3097), 2625 states have internal predecessors, (3097), 257 states have call successors, (257), 257 states have call predecessors, (257), 423 states have return successors, (665), 135 states have call predecessors, (665), 256 states have call successors, (665) [2021-11-07 08:40:04,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 4019 transitions. [2021-11-07 08:40:04,232 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 4019 transitions. Word has length 45 [2021-11-07 08:40:04,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:40:04,233 INFO L470 AbstractCegarLoop]: Abstraction has 3017 states and 4019 transitions. [2021-11-07 08:40:04,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 20 states have internal predecessors, (58), 9 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2021-11-07 08:40:04,234 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 4019 transitions. [2021-11-07 08:40:04,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 08:40:04,236 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:40:04,236 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:40:04,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 08:40:04,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:40:04,456 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:40:04,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:40:04,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1515964261, now seen corresponding path program 1 times [2021-11-07 08:40:04,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:40:04,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [206324496] [2021-11-07 08:40:04,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:40:04,458 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:40:04,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:40:04,460 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:40:04,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 08:40:05,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:05,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 08:40:05,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:40:05,679 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-07 08:40:05,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:40:06,604 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:40:06,605 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:40:06,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [206324496] [2021-11-07 08:40:06,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [206324496] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 08:40:06,605 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:40:06,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 19 [2021-11-07 08:40:06,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380166547] [2021-11-07 08:40:06,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-07 08:40:06,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:40:06,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-07 08:40:06,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-11-07 08:40:06,608 INFO L87 Difference]: Start difference. First operand 3017 states and 4019 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 13 states have internal predecessors, (51), 5 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-07 08:40:09,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:40:09,662 INFO L93 Difference]: Finished difference Result 4090 states and 5250 transitions. [2021-11-07 08:40:09,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-07 08:40:09,663 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 13 states have internal predecessors, (51), 5 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 48 [2021-11-07 08:40:09,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:40:09,704 INFO L225 Difference]: With dead ends: 4090 [2021-11-07 08:40:09,705 INFO L226 Difference]: Without dead ends: 3950 [2021-11-07 08:40:09,706 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=398, Invalid=1494, Unknown=0, NotChecked=0, Total=1892 [2021-11-07 08:40:09,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3950 states. [2021-11-07 08:40:09,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3950 to 3716. [2021-11-07 08:40:09,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3716 states, 2853 states have (on average 1.3126533473536628) internal successors, (3745), 3219 states have internal predecessors, (3745), 326 states have call successors, (326), 326 states have call predecessors, (326), 525 states have return successors, (779), 171 states have call predecessors, (779), 325 states have call successors, (779) [2021-11-07 08:40:09,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3716 states to 3716 states and 4850 transitions. [2021-11-07 08:40:09,919 INFO L78 Accepts]: Start accepts. Automaton has 3716 states and 4850 transitions. Word has length 48 [2021-11-07 08:40:09,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:40:09,919 INFO L470 AbstractCegarLoop]: Abstraction has 3716 states and 4850 transitions. [2021-11-07 08:40:09,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 13 states have internal predecessors, (51), 5 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-07 08:40:09,920 INFO L276 IsEmpty]: Start isEmpty. Operand 3716 states and 4850 transitions. [2021-11-07 08:40:09,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 08:40:09,922 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:40:09,922 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:40:09,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 08:40:10,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:40:10,142 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:40:10,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:40:10,142 INFO L85 PathProgramCache]: Analyzing trace with hash 574627678, now seen corresponding path program 1 times [2021-11-07 08:40:10,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:40:10,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [347118786] [2021-11-07 08:40:10,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:40:10,144 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:40:10,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:40:10,145 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:40:10,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 08:40:10,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:40:10,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-07 08:40:10,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:40:11,348 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 48 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-07 08:40:11,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:40:12,557 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:40:12,557 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:40:12,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [347118786] [2021-11-07 08:40:12,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [347118786] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 08:40:12,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:40:12,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 22 [2021-11-07 08:40:12,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664667166] [2021-11-07 08:40:12,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-07 08:40:12,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:40:12,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-07 08:40:12,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-11-07 08:40:12,561 INFO L87 Difference]: Start difference. First operand 3716 states and 4850 transitions. Second operand has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 15 states have internal predecessors, (64), 6 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2021-11-07 08:40:15,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:40:15,718 INFO L93 Difference]: Finished difference Result 4249 states and 5455 transitions. [2021-11-07 08:40:15,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-07 08:40:15,720 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 15 states have internal predecessors, (64), 6 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) Word has length 59 [2021-11-07 08:40:15,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:40:15,751 INFO L225 Difference]: With dead ends: 4249 [2021-11-07 08:40:15,751 INFO L226 Difference]: Without dead ends: 4177 [2021-11-07 08:40:15,753 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=493, Invalid=1957, Unknown=0, NotChecked=0, Total=2450 [2021-11-07 08:40:15,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4177 states. [2021-11-07 08:40:15,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4177 to 4017. [2021-11-07 08:40:15,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4017 states, 3083 states have (on average 1.3100875770353553) internal successors, (4039), 3485 states have internal predecessors, (4039), 349 states have call successors, (349), 349 states have call predecessors, (349), 573 states have return successors, (833), 183 states have call predecessors, (833), 348 states have call successors, (833) [2021-11-07 08:40:15,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4017 states to 4017 states and 5221 transitions. [2021-11-07 08:40:15,930 INFO L78 Accepts]: Start accepts. Automaton has 4017 states and 5221 transitions. Word has length 59 [2021-11-07 08:40:15,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:40:15,931 INFO L470 AbstractCegarLoop]: Abstraction has 4017 states and 5221 transitions. [2021-11-07 08:40:15,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 15 states have internal predecessors, (64), 6 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2021-11-07 08:40:15,932 INFO L276 IsEmpty]: Start isEmpty. Operand 4017 states and 5221 transitions. [2021-11-07 08:40:15,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 08:40:15,934 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:40:15,934 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:40:15,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 08:40:16,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:40:16,152 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:40:16,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:40:16,153 INFO L85 PathProgramCache]: Analyzing trace with hash 517554629, now seen corresponding path program 2 times [2021-11-07 08:40:16,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:40:16,153 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [405630710] [2021-11-07 08:40:16,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:40:16,154 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:40:16,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:40:16,155 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:40:16,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 08:40:16,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:40:16,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:40:17,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-07 08:40:17,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:40:18,079 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 49 proven. 49 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-07 08:40:18,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:40:21,209 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 20 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:40:21,209 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:40:21,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [405630710] [2021-11-07 08:40:21,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [405630710] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 08:40:21,209 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:40:21,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 32 [2021-11-07 08:40:21,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977479389] [2021-11-07 08:40:21,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-07 08:40:21,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:40:21,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-07 08:40:21,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2021-11-07 08:40:21,213 INFO L87 Difference]: Start difference. First operand 4017 states and 5221 transitions. Second operand has 32 states, 32 states have (on average 2.90625) internal successors, (93), 26 states have internal predecessors, (93), 12 states have call successors, (15), 10 states have call predecessors, (15), 10 states have return successors, (14), 11 states have call predecessors, (14), 12 states have call successors, (14) [2021-11-07 08:40:31,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:40:31,017 INFO L93 Difference]: Finished difference Result 7214 states and 9438 transitions. [2021-11-07 08:40:31,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-11-07 08:40:31,020 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.90625) internal successors, (93), 26 states have internal predecessors, (93), 12 states have call successors, (15), 10 states have call predecessors, (15), 10 states have return successors, (14), 11 states have call predecessors, (14), 12 states have call successors, (14) Word has length 70 [2021-11-07 08:40:31,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:40:31,083 INFO L225 Difference]: With dead ends: 7214 [2021-11-07 08:40:31,083 INFO L226 Difference]: Without dead ends: 7154 [2021-11-07 08:40:31,087 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=1482, Invalid=6890, Unknown=0, NotChecked=0, Total=8372 [2021-11-07 08:40:31,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7154 states. [2021-11-07 08:40:31,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7154 to 5071. [2021-11-07 08:40:31,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5071 states, 3907 states have (on average 1.3112362426414128) internal successors, (5123), 4429 states have internal predecessors, (5123), 421 states have call successors, (421), 421 states have call predecessors, (421), 731 states have return successors, (1057), 221 states have call predecessors, (1057), 420 states have call successors, (1057) [2021-11-07 08:40:31,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5071 states to 5071 states and 6601 transitions. [2021-11-07 08:40:31,395 INFO L78 Accepts]: Start accepts. Automaton has 5071 states and 6601 transitions. Word has length 70 [2021-11-07 08:40:31,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:40:31,397 INFO L470 AbstractCegarLoop]: Abstraction has 5071 states and 6601 transitions. [2021-11-07 08:40:31,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.90625) internal successors, (93), 26 states have internal predecessors, (93), 12 states have call successors, (15), 10 states have call predecessors, (15), 10 states have return successors, (14), 11 states have call predecessors, (14), 12 states have call successors, (14) [2021-11-07 08:40:31,399 INFO L276 IsEmpty]: Start isEmpty. Operand 5071 states and 6601 transitions. [2021-11-07 08:40:31,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 08:40:31,401 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:40:31,401 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:40:31,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 08:40:31,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:40:31,615 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr5ENSURES_VIOLATIONMEMORY_LEAK === [pushErr0REQUIRES_VIOLATION, pushErr1REQUIRES_VIOLATION, pushErr2REQUIRES_VIOLATION, pushErr3REQUIRES_VIOLATION, pushErr4REQUIRES_VIOLATION (and 15 more)] === [2021-11-07 08:40:31,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:40:31,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1608789574, now seen corresponding path program 1 times [2021-11-07 08:40:31,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:40:31,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [956362869] [2021-11-07 08:40:31,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:40:31,617 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:40:31,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:40:31,618 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:40:31,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 08:40:32,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 08:40:32,442 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-07 08:40:32,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 08:40:32,810 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-11-07 08:40:32,810 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-11-07 08:40:32,812 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr5ENSURES_VIOLATIONMEMORY_LEAK [2021-11-07 08:40:32,814 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr0REQUIRES_VIOLATION [2021-11-07 08:40:32,814 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr1REQUIRES_VIOLATION [2021-11-07 08:40:32,815 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr2REQUIRES_VIOLATION [2021-11-07 08:40:32,815 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr3REQUIRES_VIOLATION [2021-11-07 08:40:32,815 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr4REQUIRES_VIOLATION [2021-11-07 08:40:32,815 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr5REQUIRES_VIOLATION [2021-11-07 08:40:32,816 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr6REQUIRES_VIOLATION [2021-11-07 08:40:32,816 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location pushErr7REQUIRES_VIOLATION [2021-11-07 08:40:32,816 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr0REQUIRES_VIOLATION [2021-11-07 08:40:32,816 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr1REQUIRES_VIOLATION [2021-11-07 08:40:32,816 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr2REQUIRES_VIOLATION [2021-11-07 08:40:32,817 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr3REQUIRES_VIOLATION [2021-11-07 08:40:32,817 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr4REQUIRES_VIOLATION [2021-11-07 08:40:32,817 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location popErr5REQUIRES_VIOLATION [2021-11-07 08:40:32,817 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-11-07 08:40:32,818 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-11-07 08:40:32,818 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2ASSERT_VIOLATIONMEMORY_FREE [2021-11-07 08:40:32,818 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3ASSERT_VIOLATIONMEMORY_FREE [2021-11-07 08:40:32,818 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4ASSERT_VIOLATIONMEMORY_FREE [2021-11-07 08:40:32,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 08:40:33,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:40:33,045 INFO L731 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:40:33,049 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-07 08:40:33,133 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-11-07 08:40:33,201 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 08:40:33 BoogieIcfgContainer [2021-11-07 08:40:33,202 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-07 08:40:33,202 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-07 08:40:33,203 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-07 08:40:33,203 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-07 08:40:33,204 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:39:25" (3/4) ... [2021-11-07 08:40:33,208 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-07 08:40:33,209 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-07 08:40:33,210 INFO L168 Benchmark]: Toolchain (without parser) took 69393.92 ms. Allocated memory was 48.2 MB in the beginning and 209.7 MB in the end (delta: 161.5 MB). Free memory was 33.1 MB in the beginning and 69.9 MB in the end (delta: -36.8 MB). Peak memory consumption was 122.7 MB. Max. memory is 16.1 GB. [2021-11-07 08:40:33,212 INFO L168 Benchmark]: CDTParser took 0.44 ms. Allocated memory is still 48.2 MB. Free memory was 29.8 MB in the beginning and 29.8 MB in the end (delta: 52.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 08:40:33,213 INFO L168 Benchmark]: CACSL2BoogieTranslator took 709.59 ms. Allocated memory was 48.2 MB in the beginning and 62.9 MB in the end (delta: 14.7 MB). Free memory was 33.0 MB in the beginning and 39.3 MB in the end (delta: -6.4 MB). Peak memory consumption was 11.8 MB. Max. memory is 16.1 GB. [2021-11-07 08:40:33,213 INFO L168 Benchmark]: Boogie Preprocessor took 133.17 ms. Allocated memory is still 62.9 MB. Free memory was 39.1 MB in the beginning and 36.1 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 08:40:33,214 INFO L168 Benchmark]: RCFGBuilder took 1294.19 ms. Allocated memory is still 62.9 MB. Free memory was 35.9 MB in the beginning and 41.2 MB in the end (delta: -5.3 MB). Peak memory consumption was 11.9 MB. Max. memory is 16.1 GB. [2021-11-07 08:40:33,215 INFO L168 Benchmark]: TraceAbstraction took 67239.84 ms. Allocated memory was 62.9 MB in the beginning and 209.7 MB in the end (delta: 146.8 MB). Free memory was 40.7 MB in the beginning and 70.9 MB in the end (delta: -30.3 MB). Peak memory consumption was 116.3 MB. Max. memory is 16.1 GB. [2021-11-07 08:40:33,215 INFO L168 Benchmark]: Witness Printer took 6.41 ms. Allocated memory is still 209.7 MB. Free memory was 70.9 MB in the beginning and 69.9 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 08:40:33,218 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.44 ms. Allocated memory is still 48.2 MB. Free memory was 29.8 MB in the beginning and 29.8 MB in the end (delta: 52.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 709.59 ms. Allocated memory was 48.2 MB in the beginning and 62.9 MB in the end (delta: 14.7 MB). Free memory was 33.0 MB in the beginning and 39.3 MB in the end (delta: -6.4 MB). Peak memory consumption was 11.8 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 133.17 ms. Allocated memory is still 62.9 MB. Free memory was 39.1 MB in the beginning and 36.1 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1294.19 ms. Allocated memory is still 62.9 MB. Free memory was 35.9 MB in the beginning and 41.2 MB in the end (delta: -5.3 MB). Peak memory consumption was 11.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 67239.84 ms. Allocated memory was 62.9 MB in the beginning and 209.7 MB in the end (delta: 146.8 MB). Free memory was 40.7 MB in the beginning and 70.9 MB in the end (delta: -30.3 MB). Peak memory consumption was 116.3 MB. Max. memory is 16.1 GB. * Witness Printer took 6.41 ms. Allocated memory is still 209.7 MB. Free memory was 70.9 MB in the beginning and 69.9 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 592]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 592. Possible FailurePath: [L528] struct cell *S; [L529] int pc1 = 1; [L530] int pc4 = 1; [L531] static struct cell *t1 = ((void *)0); [L532] static struct cell *x1 = ((void *)0); [L561] struct cell* garbage; [L562] static struct cell *t4 = ((void *)0); [L563] static struct cell *x4 = ((void *)0); [L566] static int res4; VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=18, \old(pc4)=28, \old(res4)=22, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] [L594] COND TRUE 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L537] x1 = malloc(sizeof(*x1)) [L538] x1->data = 0 VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=2, pc1++=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L539] x1->next = ((void *)0) VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=2, pc1++=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L594] COND TRUE 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=2, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L541] case 2: VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=2, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=3, pc1++=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L542] x1->data = 4 VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=2, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=3, pc1++=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=3, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L594] COND TRUE 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=3, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=3, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L545] t1 = S VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=3, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=4, pc1++=3, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=4, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L594] COND TRUE 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=4, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=4, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L547] case 4: VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=4, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=5, pc1++=4, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L548] x1->next = t1 VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=4, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=5, pc1++=4, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=5, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L594] COND TRUE 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=5, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=5, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L547] case 4: [L550] case 5: VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=5, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc1++=5, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L551] COND TRUE S == t1 [L552] S = x1 VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=5, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc1++=5, pc4=1, res4=0, S={1:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=1, res4=0, S={1:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L594] COND TRUE 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=6, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=6, pc4=1, res4=0, S={1:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L547] case 4: [L550] case 5: [L556] case 6: [L557] pc1 = 1 VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=6, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=1, pc1++=6, pc4=1, res4=0, S={1:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L596] RET push() VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=1, pc4=1, res4=0, S={1:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L594] COND FALSE !(1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int()) [L600] COND FALSE !(\read(*garbage)) VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, garbage={0:0}, pc1=1, pc4=1, res4=0, S={1:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L605] S = ((void *)0) [L606] t1 = ((void *)0) [L607] x1 = ((void *)0) [L608] t4 = ((void *)0) [L609] x4 = ((void *)0) [L610] return !!garbage; VAL [\old(garbage)=null, \old(garbage)=null, \old(pc1)=1, \old(pc4)=1, \old(res4)=0, \old(S)=null, \old(S)=null, \old(t1)=null, \old(t1)=null, \old(t4)=null, \old(t4)=null, \old(x1)=null, \old(x1)=null, \old(x4)=null, \old(x4)=null, \result=0, garbage={0:0}, pc1=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 539]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 539]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 585]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 585]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 586]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 586]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 601]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 601]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 12 procedures, 96 locations, 20 error locations. Started 1 CEGAR loops. OverallTime: 66.9s, OverallIterations: 19, TraceHistogramMax: 6, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 35.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 2412 SDtfs, 14226 SDslu, 3700 SDs, 0 SdLazy, 10230 SolverSat, 3710 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 16.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1242 GetRequests, 822 SyntacticMatches, 0 SemanticMatches, 420 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4579 ImplicationChecksByTransitivity, 17.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=5071occurred in iteration=18, InterpolantAutomatonStates: 335, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.7s AutomataMinimizationTime, 18 MinimizatonAttempts, 4146 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 2.3s SatisfiabilityAnalysisTime, 17.4s InterpolantComputationTime, 567 NumberOfCodeBlocks, 567 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 956 ConstructedInterpolants, 0 QuantifiedInterpolants, 5575 SizeOfPredicates, 63 NumberOfNonLiveVariables, 4143 ConjunctsInSsa, 210 ConjunctsInUnsatCore, 36 InterpolantComputations, 14 PerfectInterpolantSequences, 291/834 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-07 08:40:33,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15fa213d-538c-4b95-a99d-be30129290c2/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample